Dissertations / Theses: 'Power Line Communication'

1

Rabie, Khaled Maaiuf. "Power line communication systems." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/power-line-communication-systems(7692173b-5d68-4483-b5ea-d871bfcdafcf).html.

Full text

Abstract:

The remarkably increasing demand for communication systems has recently forced the research community to consider power line (PL) networks for data transmission, which is commonly referred to as power line communications(PLC). In particular, this technology becomes more attractive in harsh wireless environments where radio spectrum is scarce or/and propagation loss is high such as in underground structures and buildings with metal walls. PLC can support many applications such as home-networking, internet and smart grid. More specifically, PLC is considered the backbone of smart grids, not only because no extra wiring installation is required, but also because PLC is a through-grid technology which could reduce the reliance of the utility companies on third party connectivity and, consequently, overcome many security and privacy issues. On the other hand, since PLs were not designed for data transmission, communication signals over such channels can degrade tremendously. Contrary to many other communication channels, noise over PLs cannot be described as additive white Gaussian noise. It is rather categorized broadly into impulsive noise and background noise with the former being the most crucial element influencing PLC systems. With this in mind, this thesis will primarily focus on studying and developing advanced techniques and algorithms to reduce the severity of impulsive noise over PL channels. The contributions of this thesis are described as follows. Initially, a thorough review is provided to introduce and compare the challenges facing PLC, PL channel and noise modelling schemes, as well as some noise mitigation techniques. Next, novel approaches are proposed, with different degrees of effectiveness and complexity, to reduce the effect of impulsive noise in orthogonal frequency-division multiplexing (OFDM)-based PLC systems. Firstly, an adaptive hybrid preprocessing system is introduced to improve the performance of the conventional hybrid approach. In this respect, closed-form expressions for the output signal-to-noise ratio (SNR), probability of missed detection and probability of successful detection are derived. Secondly, and unlike existing works which are entirely based on countering impulsive noise at the receiver side, we show that if the OFDM signal is preprocessed at the transmitter side in such a way to minimize the signal peaks, the noise cancellation process can be made more efficient at the receiver. This is accomplished by applying a peak-to-average power ratio reduction scheme such as selective mapping. A closed-form expression for the probability of blanking error of this system is derived. Thirdly, to eliminate the estimation requirement problem of the short-term noise statistics associated with the aforementioned approaches, we propose the dynamic peak-based threshold estimation (DPTE) method. This method relies on utilizing the OFDM signal peak estimates with which optimal blanking is achieved irrespective of the noise parameters. In addition, to realize DPTE, a look-up table algorithm with uniform quantization is exploited and investigated in various system configurations. Furthermore, this thesis explores the performance of multi-carrier code division multiple access (MC-CDMA) systems over the multipath PL channel contaminated with Middleton class-A noise for various spreading codes, namely, Pseudonoise, Walsh-Hadamard and orthogonal poly-phase sequences. Different nonlinear preprocessors are implemented and the corresponding performance is evaluated in terms of the output SNR and symbol error rate.

APA, Harvard, Vancouver, ISO, and other styles

2

Sun, Yuhao. "Power optimised narrowband power-line communication systems." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648110.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Rönnberg, Sarah. "Power line communication and customer equipment." Licentiate thesis, Luleå tekniska universitet, Energivetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18508.

Full text

Abstract:

In Sweden, the change from manual meter reading at irregular intervals, to automatic remote meter reading at predefined instants was completed in July 2009. This change is ongoing or largely completed in a number of other European countries as well. Several methods for communication between the meter and the network operator are in use. In Sweden power-line communication is used for communication with about half of the meters. The frequency range between 9 and 95 kHz contains, in addition to communication signals, conducted emission from end-user equipment connected to the power grid. Electronic components in end-user equipment can also in other ways affect the characteristic of the power lines as a communication media.The aim of this thesis is to give an overview of how power line communication in the frequency range 9 to 95 kHz can interact with modern energy saving end-user equipment. Potential problems concerning this interaction have been identified.Results presented in this thesis are based on a large number of measurements of voltage and current distortions due to connected loads and due to power line communication.A total of five different ways of interaction between power-line communication and end-user equipment are identified in this thesis. As a spin-off from this work, also new aspects of the interaction between end-user equipment have been identified. Godkänd; 2011; 20110325 (ronsar); LICENTIATSEMINARIUM Ämnesområde: Energiteknik/Energy Engineering Examinator: Professor Math Bollen, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet Diskutant: Dr, Senior Researcher Pertti Pakonen, Tampere University of Technology, Finland Tid: Torsdag den 28 april 2011 kl 10.00 Plats: Campus Skellefteå, Luleå tekniska universitet

APA, Harvard, Vancouver, ISO, and other styles

4

Huo, Yinjia. "Efficient access control for power line communication networks." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61360.

Full text

Abstract:

Broadband power line communications (BB-PLC) reuse power line infrastructure to provide high-speed and high-penetration data transmissions, which make BB-PLC an attractive solution to in-vehicle networks (IVNs) and home area networks (HANs). However, there still exist many research issues that need to be addressed before we can readily apply BB-PLC to these two application scenarios. To partially address these issues, the thesis proposes some efficient access control schemes by extending a popular BB-PLC protocol, HomePlug AV (HPAV). The latency performance of the original HPAV protocol is not satisfactory for IVNs. Thus, we introduce the Virtual Collision (VC) mechanism as an enhancement to the HPAV random back-off procedure to reduce the queuing latency. In addition, the relationships between transmissions of different classes of network traffic involved in an IVN are not well handled by the strict priority transmission selection algorithm (TXSA) specified in the HPAV protocol. In this regard, we propose to combine the strict priority TXSA with the Audio Video Bridging credit-based shaping (CBS) TXSA. The efficiency of the HPAV medium access control (MAC) layer is restricted by various MAC overheads, which makes the deployment of BB-PLC in a HAN less attractive. We use the emerging in-band full duplexing capability to enable two new techniques, Mutual Preamble Detection (MPD) and Contention Free Pre-sensing (CFP) to reduce these overheads. Then, aiming to provide a unified solution to support various HAN applications, we develop an interface with prioritization and traffic shaping to accommodate the heterogeneous network traffic involved. We use OMNeT++, a discrete event simulator, to verify the effectiveness of our proposed schemes, by comparing the network performance with our proposed schemes to that of the original HPAV protocol. The simulation results show that VC satisfactorily reduces queuing latency, the new TXSA better handles different priorities, MPD works well with CFP to improve MAC efficiency and the developed interface functions properly. While there still exist many research issues before we can exploit the full advantages of BB-PLC, our proposed schemes bring us one step closer towards that goal. Applied Science, Faculty of Electrical and Computer Engineering, Department of Graduate

APA, Harvard, Vancouver, ISO, and other styles

5

Morris, Kerry John. "Power line communication systems for industrial control applications." Thesis, Open University, 2001. http://oro.open.ac.uk/58199/.

Full text

Abstract:

For almost as long as the electricity distribution industry itself has existed, so also has the idea of utilising the transmission grid, be it over a wide area or on a local basis, for the transmission of 'intelligence'. This might be in the form of voice transmissions, or for the purposes of monitoring or controlling electrical devices attached to the network. This thesis specifically concerns itself with the potential applications of power-line-carrier (PLC) communications technology within the field of industrial plant/equipment control, as it is within this field that the author works. We look at the entire subject area of industrial control, starting from a historical viewpoint, and consider the special needs and requirements that a proposed PLC solution must offer for this application, especially based on the noise conditions likely to be experienced on a `real' power line. A proposal is made for a `Power Bus', intended for use within certain areas of industrial control, and decisions are made based on the projected link response times for such applications. The experimental phase of the research is practical in nature and consists of a raft of tests and evaluations of the performance of power line modem technologies, under controlled and repeatable noise conditions. To complement these results, further tests are carried out under `real world' conditions, within an actual factory environment. Based on the results of all of these tests, the suitability of a PLC solution for this type of industrial control application is considered. The Thesis concludes with a look at recent developments in, as well as the future of, Power Line Communication techniques.

APA, Harvard, Vancouver, ISO, and other styles

6

Wicomb, Lindsay Paul. "OFDM modulation techniques for domestic power line communication." Thesis, Cape Peninsula University of Technology, 2005. http://hdl.handle.net/20.500.11838/1083.

Full text

Abstract:

Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2005 With the growth of the personal computer industry, a number of households now contain two or more personal computers. The need to share resources such as printers, scanners and other PC peripherals has become evident. Communication between personal computers and other smart devices in the home is also required. This brings the emergence of home networking together with home automation. Home networking is the collection of elements to enable the connection and integration of multiple computing, control and communication devices. There are various options at this stage for home networking. One of the broadband options is indoor power line communication. The aim of the project was to evaluate a communication system capable of performing efficiently in South African Home Power line environment. In designing a communication system capable of performing in the harsh conditions which are presented in the home environment (noise, attenuation, phase distortion, etc.), a mathematical model that is representative of a typical suburban South African home power line is required. To aid the modeling process, an experimental network was constructed so measurements could be taken in a controlled environment. In conjunction with simulation, the model of the home power line network has aided the design of the data communication system. The project has involved: • Determining optimal specifications for the communication system. • Development of a home power line model representative of a typical South African suburban home environment. • Construction and measurement of an experimental power grid • Development of methods, algorithms and programs for the design of an OFDM PLC modem (in software) to optimal specifications. • Simulation development in MA1LAB of the OFDM Modem. • Comparison of different OFDM sub-modulation schemes for enhancing the communication system performance, In conclusion, the simulation model of the PLC modem correlates well with typical practical systems. Optimising throughput of the communication system and hardware development of the modem will form the basis for further research.

APA, Harvard, Vancouver, ISO, and other styles

7

Tran, Thanh Kha. "Power Line Communication (PLC) for DC Microgrid systems." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSE1035.

Full text

Abstract:

L'utilisation de fils électriques pour fournir des capacités de transmission de données, connues sous le nom de Courant Porteur en Ligne (CPL), a beaucoup évolué au cours des dernières années afin de pouvoir répondre à des besoins croissants de transfert de données l’impliquant la communauté scientifique, la recherche industrielle, ainsi que des organismes de réglementation et de normalisation. Les réseaux CPL offrent un certain nombre d’avantages qui en font un complément utile et un concurrent fort pour les solutions de réseau sans fil. Le principal intérêt des réseaux CPL réside sur le coût marginal de déploiement lorsqu'une infrastructure électrique câblée est déjà en place. Les réseaux CPL permettent la communication à des débits de données élevés à travers des obstacles qui dégradent généralement les signaux sans fil. Et constitue donc constitue une alternative peu coûteuse pour compléter les technologies existantes en vue d'une couverture complété d’un bâtiment ou d’un quartier. La plupart des solutions CPL étaient utilisées sur le réseau à courant alternatif (CA), mais avec l’arrivée des énergies renouvelables de nouvelles perspectives s’ouvrent avec les réseaux à courant continu (CC). Cette thèse propose une solution CPL simple et innovante pour une structure maillée micro-réseau pour la distribution et la consommation d'énergie à CC. Cette contribution fait partie du projet Composant Commande Communication des micro-grids DC (C3μ) financé par l’ANR (2016 – 2020). Ce projet propose de remplacer la distribution « classique » d’une architecture (CA) par une architecture de micro-réseau intelligent à CC permettant l’intégration de diverses sources (EnR, batterie, …) pour la distribution d’électricité dans les bâtiments. Cette thèse propose une architecture de Courant Porteur en Ligne pour les micro-réseaux à CC basée sur un nouveau modem physique sur courant porteur sur le bus CC et CAN (une norme ouverte issue de l’industrie automobile). Afin de valider l’architecture, un véritable banc de test pour micro-réseaux à CC avec PV, LED et la batterie a été mis en œuvre pour servir d’outil de test pour la communication. Les tests de transmission de données entre les nœuds de CPL ont permis d’évaluer les performances de notre pile de protocolaire par rapport aux exigences des applications de micro-réseaux CC. Les principaux résultats concernant l'applicabilité de ce concept et ses limites sont également été présentés The use of electrical wires to provide data transmission capabilities, known as Power Line Communication (PLC), has recently attracted considerable attention from the research community and industry, as well as from regulatory and standardization bodies. PLC networks boast several outstanding features that make them both a useful complement and a strong competitor for wireless networking solutions. The most obvious appeal of PLC networks is their low deployment cost when a wired electrical infrastructure is already in place. Besides, PLC networks allow communication through obstacles that commonly degrade wireless signals and deliver high data-rates simultaneously. PLC also provides a low-cost alternative that complements existing technologies with the aim of ubiquitous coverage. However, most PLC solutions are used on the AC grid. Until now, there are only a few studies on PLC for the DC grid, especially the DC microgrid. This thesis focuses on proposing an innovative and straightforward PLC solution for applications in DC energy distribution systems. This subject refers to a part of the C3μ project funded by the National Research Agency of France (ANR). This C3μ project investigates the possibility of using a DC smart microgrid architecture for distributing electricity in buildings instead of an AC one.This thesis has proposed a powerline communication solution for DC microgrid based on a new powerline physical modem on DC bus and CANopen (an open standard coming from the automotive industry). Moreover, a real DC microgrid testbed with PV, LED, and the battery has been implemented as a research tool for communication. The practical data transmission tests between PLC nodes have been carried out to evaluate the performance of our solution against the requirements set by the DC microgrid applications. The main results concerning the applicability of this concept and its limitations have also been presented

APA, Harvard, Vancouver, ISO, and other styles

8

Zhuang, Yifei. "Physical layer security in MIMO power line communication networks." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50241.

Full text

Abstract:

It has been well established that multiple-input multiple-output (MIMO) transmission using multiple conductors can improve the data rate of power line communication (PLC) systems. In this thesis, we investigate whether the presence of multiple conductors could also facilitate the communication of confidential messages by means of physical layer security methods. In particular, this thesis focuses on the secrecy capacity of MIMO PLC. Numerical experiments show that multi-conductor PLC networks can enable a more secure communication compared to the single conductor case. On the other hand, we demonstrate that the keyhole property of PLC channels generally diminishes the secure communication capability compared to what would be achieved in a similar wireless communications setting. Furthermore, we consider the cases of unknown and partially known channel state information (CSI) about the eavesdropper channel. For this purpose, we provide deterministic channel uncertainty model parameters for PLC networks via the bottom-up channel modelling method. Numerical results show how imperfect CSI has a negative impact on secure communication, and enable us to analyze the tradeoff between choosing different transmission strategies that correspond to unknown CSI and partially known CSI. Applied Science, Faculty of Electrical and Computer Engineering, Department of Graduate

APA, Harvard, Vancouver, ISO, and other styles

9

Fernandes, Daniel Leocádio. "Comunicação cooperativa e em diversidade para power line communication." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/4148.

Full text

Abstract:

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-24T11:27:36Z No. of bitstreams: 1 danielleocadiofernandes.pdf: 2042919 bytes, checksum: c8ee87c6b0e8118f3fdb4cd6ebbc26c6 (MD5) Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-24T16:54:33Z (GMT) No. of bitstreams: 1 danielleocadiofernandes.pdf: 2042919 bytes, checksum: c8ee87c6b0e8118f3fdb4cd6ebbc26c6 (MD5) Made available in DSpace on 2017-04-24T16:54:33Z (GMT). No. of bitstreams: 1 danielleocadiofernandes.pdf: 2042919 bytes, checksum: c8ee87c6b0e8118f3fdb4cd6ebbc26c6 (MD5) Previous issue date: 2012-09-27 A presente contribuição apresenta investigações e análises da comunicação cooperativa e em diversidade para melhorar a cobertura e o desempenho de sistemas power line communication (PLC) em redes de distribuição de energia elétrica externas e de baixa tensão. Neste contexto, o desempenho dos protocolos de cooperação ampliﬁcar e retransmitir (amplify and forward - AF); ampliﬁcar, equalizar e retransmitir (amplify, equalize, and forward - AEF) e decodiﬁcar e retransmitir (decode and forward - DF) é analisado quando existe um nó de retransmissão ou de cooperação entre os nós de origem e destino. Os esquemas orthogonal frequency division multiplexing (OFDM) e single carrier with cyclic preﬁx (SC-CP); a modulação coerente 4-QAM, o canal PLC modelado como linear e invariante no tempo, ruído aditivo modelado additive white Gaussian noise (AWGN) e additive impulsive Gaussian noise (AIGN) constituem os esquemas de modulação adotados e o meio de comunicação de dados. Os resultados indicam que a cooperação traz benefícios para sistemas PLC e, portanto, é de grande interesse a sua introdução nas novas gerações de transceptores PLC. Além disso, considerando o esquema OFDM, modulação 4-QAM e cenário de simulação baseado nas mesmas premissas adotadas para avaliar a comunicação cooperativa, a comunicação em diversidade, baseada na seleção das sub-portadoras, foi analisada visando, sobretudo, veriﬁcar os ganhos que podem ser obtidos em relação a robustez e conﬁabilidade de transceptores PLC, os quais são voltados para o atendimento dos requisitos de qualidade de serviços de aplicações smart grid communication, tal como smart metering. Os resultados numéricos, obtidos através de simulações computacionais, conﬁrmam que o aumento da diversidade melhora a conﬁabilidade dos sistemas PLC, mas reduz a vazão do mesmo. Assim sendo, comunicação em diversidade é promissora para smart metering, posto que, para esta aplicação, conﬁabilidade e robustez são requisitos de maior importância do que elevada vazão. This thesis aims at investigating and analyzing cooperative communication as well as communication with diversity to improve the coverage and the performance of power line communication (PLC) systems in outdoor and low-voltage distribution electric grids. In this context, the performance of cooperative protocols, such as amplify and forward (AF); amplify, equalize, and forward (AEF); and decode and forward (DF), are analyzed when only one relay, between the source node and destination node, is considered. The orthogonal frequency division multiplexing (OFDM) and single carrier with cyclic preﬁx (SC-CP) schemes; 4-QAM coherent modulation; linear and time invariant PLC channels, additive noise modeled as additive white Gaussian noise (AWGN) and additive impulsive Gaussian noise (AIGN) constitute the end-to-end communication link for performance evaluation. The performance results show that cooperation can oﬀer beneﬁts to PLC systems and, as a consequence, its introduction in new generations of PLC transceivers could be beneﬁcial. Additionally, by taking into account the OFDM scheme, 4-QAM coherent modulation and the same constraints applied to analyze the cooperative communication, the communication with diversity, in which a subcarrier selection criterion is adopted, was also investigated and analyzed. The purpose of addressing diversity is to highlight what kind of gains can be obtained to improve the reliability and robustness of PLC transceivers, in order to fulﬁll the requirements of smart grid communication, such as smart metering. The numerical results verify that diversity can indeed increase the reliability and robustness of PLC transceivers, however it reduces the throughput. For smart metering, communication with diversity seems to be promising because reliability and robustness are much more important requirement than higher throughput.

APA, Harvard, Vancouver, ISO, and other styles

10

Franzin, Renato Pivesso. "Estudo da técnica FBMC aplicada em Power line communication." Universidade Presbiteriana Mackenzie, 2017. http://tede.mackenzie.br/jspui/handle/tede/3443.

Full text

Abstract:

Submitted by Marta Toyoda (1144061@mackenzie.br) on 2018-02-08T19:53:42Z No. of bitstreams: 2 RENATO PIVESSO FRANZIN.pdf: 4022365 bytes, checksum: 9a9f1f649dcaff054b2cc033a7c69dba (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Paola Damato (repositorio@mackenzie.br) on 2018-02-22T13:30:38Z (GMT) No. of bitstreams: 2 RENATO PIVESSO FRANZIN.pdf: 4022365 bytes, checksum: 9a9f1f649dcaff054b2cc033a7c69dba (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2018-02-22T13:30:38Z (GMT). No. of bitstreams: 2 RENATO PIVESSO FRANZIN.pdf: 4022365 bytes, checksum: 9a9f1f649dcaff054b2cc033a7c69dba (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-10-27 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior The present dissertation presented a comparative analysis between OFDM and FBMC modulation techniques, applied in Power Line Communication (PLC) technology, considering realistic channel models. With the growing demand for access to broadband data networks, there is a need to integrate the various data communication technologies. In this scenario, PLC networks can o er a viable alternative as a provider of network access, since they use the infrastructure of the transmission lines. However, the electrical network is a hostile medium for data transmission, presenting impedance mismatches, noise interference and signal propagation in multipath, characterizing the PLC channel model. With the objective of increasing the data transmission rate, as well as to obtain a better utilization of available bandwidth, the present work proposed to replace the OFDM technique by FBMC in PLC networks. For this, a study of the channel model was carried out to obtain the necessary parameters for the computational simulations through Matlab software. The OFDM and FBMC techniques were implemented according to IEEE 1901 standard technical speci cations. With the results obtained in the simulations, it was veri ed that the FBMC is more robust the channel interferences, presenting gains of up to 8 dB in the bit error rate, and an increase in the data transmission rate and spectral e ciency of up to 25% in relation to OFDM. Therefore, the FBMC technique can be implemented at the physical layer of the IEEE 1901 standard, replacing OFDM. A presente dissertação apresentou uma análise comparativa entre as t_ecnicas de modulação OFDM e FBMC, aplicadas na tecnologia Power Line Communication (PLC), considerando modelos realísticos de canais. Com a crescente demanda ao acesso das redes de dados em banda larga, há uma necessidade de integração das diversas tecnologias de comunicação de dados. Nesse cenário, as redes PLC podem oferecer uma alternativa viável como provedora de acesso à rede, pois utilizam a infraestrutura das linhas de transmissão de energia elétrica. Entretanto, a rede elétrica é um meio hostil para transmissão de dados, apresentando desajustes de impedância, interferência de ruído e propagação do sinal em multipercursos, caracterizando o modelo do canal PLC. Com o objetivo de aumentar a taxa de transmissão de dados, como também obter um melhor aproveitamento da largura de banda disponível, o presente trabalho propôs substituir a técnica OFDM pela FBMC em redes PLC. Para isso, foi realizado um estudo do modelo do canal, para obter os parâmetros necessários para as simulações computacionais por meio do software Matlab. As técnicas OFDM e FBMC foram implementadas de acordo com especificações técnicas do padrão IEEE 1901. Com os resultados obtidos nas simulações, constatou que o FBMC é mais robusto as interferências do canal, apresentando ganhos de até 8 dB na taxa de erro de bit, e um incremento na taxa de transmissão de dados e eficiência espectral de até 25% em relação ao OFDM. Portanto, a técnica FBMC pode ser implementada na camada física do padrão IEEE 1901, substituindo o OFDM.

APA, Harvard, Vancouver, ISO, and other styles

11

Çelebi, Hasan Basri. "Noise and Multipath Characteristics of Power Line Communication Channels." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1594.

Full text

Abstract:

With the recent developments in technology, information and communication technologies (ICTs) are becoming more widespread and one of the basic building blocks of every humans life. The increasing demand in broadband communication calls for new technologies. Power line communication (PLC) is one of the potential candidates for next generation ICTs. Although communication through power lines has been investigated for a long time, PLC systems were never taken into account seriously because of its harsh communication medium. However, with the development of more robust data transmission schemes, communication over the power lines is becoming a strong alternative technology because of the existence of the infrastructure and the ubiquity of the network. In order to establish reliable communication systems operating on power line networks (PLNs), characteristics of power line channels have to be investigated very carefully. Unpredictable characteristics of PLNs seriously affect the performance of communication systems. Similar to the other communication channels, PLC environment is affected by noise, attenuation, and multipath type of channel distortions. The level of noise in PLNs is much higher than any other type of communication networks. Furthermore, the frequency dependent attenuation characteristics of power lines and multipath stemming from impedance mismatches are the other distortion factors which have to be investigated in order to establish a reliable PLC system. In this thesis, we focus on modeling of noise, frequency dependent attenuation, and multipath characteristics of power line channels within the frequency range between 30kHz and 30MHz.

APA, Harvard, Vancouver, ISO, and other styles

12

Chin, Pin Rui. "Adaptive impedance matching circuit for narrowband power line communication." Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/1345.

Full text

Abstract:

The noise level and impedance mismatch are still the main concerns in the narrowband power line communication (NB-PLC) technology. The low voltage power line network has impedances that are time and location variant. So it is difficult to achieve maximum power transfer all the time. Thus two new adaptive impedance matching circuits are proposed for NB-PLC. These methodologies are derived from the RLC and LCRC circuit model to achieve simpler configuration and higher matching resolution.

APA, Harvard, Vancouver, ISO, and other styles

13

Tam, Wai Kei. "Home appliances control system incorporating wireless communication and power line." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1636548.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Dan, Wu. "Improvement for LDPC Coded OFDM Communication System over Power Line." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128177.

Full text

Abstract:

Power line communication has been around in past decades and gained renewed attention thanks to the demand of high-speed Internet access. With the significant advantages of existing infrastructure and accessibility to even remote areas, power grid has become one of the promising competitors for multi-media transmission in household. However, the power line was not oriented for data transmission providing a rather hash environment. To overcome the difficulties, advanced modulation and channel coding schemes should be employed. In the thesis low density parity check code (LDPC) is employed to reduce the loss caused by various kinds of effects in the channel especially the noise since its performance approaches to Shannon capacity limit. Moreover, OFDM multi-carrier transmission technique is involved which could decrease the inter-symbol interference and frequency selective fading. Nevertheless, LDPC decoding process was designed specifically for the common Gaussian white noise condition, combined with OFDM modulation the system still could not provide satisfying and practicable performance so improvements are needed for the system. The main works of the thesis are as follows. Set up an environment of power line transmission investigating and simulating the channel characteristics; employ multi-path channel model and Class‐A noise model for further developing the improvement algorithms to deal with the selective fading and impulse noise. Two algorithms proposed here are from different perspectives: the first one is modifying initial posterior information for LDPC decoding and the second one aims at suppressing the impulse noise after demodulation. Finally, a few simulations are performed to reveal the effectiveness of proposed methods. As a result, the improved scheme shows a great superiority improving the performance by no less than 5dB compared to traditional system.

APA, Harvard, Vancouver, ISO, and other styles

15

Mehboob, Anser. "Impulsive noise mitigation for OFDM based power line communication systems." Thesis, University of Leeds, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.634532.

Full text

Abstract:

There has been significant progress in the area of Power Line Communications (PLC) in the recent few years primarily focused on in-house PLC systems. Since the cables are already laid down in the house, PLC offers quite attractive option for in-house automation, broadband communication and high definition video transmission. However, since the power lines have not been designed for data communications, the environment is considerably unfavorable for communications due to the multipath effects from the joints in the cables and different types of noise impurities especially asynchronous impulsive noise. The asynchronous impulsive noise in power lines varies in its density over the time which makes it formidable to estimate and remove. This thesis documents the premises of Orthogonal Frequency Division Multiplexing (OFDM) based PLC systems in regards to the impulsive noise mitigation. For this purpose, an adaptive impulsive noise mitigation scheme has been developed to accurately estimate the 'varying-density' impulsive noise using adaptive pilots assignment and Compressed Sensing thereby coining the term Multi Mode Compressed Sensing (MMCS). The MMCS scheme has further been improved by proposing more accurate density estimation algorithm called Modified Gini Index. The MMCS scheme has been shown to improve the Bit Error Rate (BER) performance and overall throughput of the system as compared to fixed pilots CS schemes. In addition to that, the time-domain impulsive noise and channel impulse response reconstruction is cast as a single joint estimation problem using the notion of sparsity for OFDM system wherein the probability of impulsive noise interfering with channel impulse response is shown to be negligibly small. This allows the impulsive noise and channel impulse response supports to be assumed as disjoint. Furthermore, Compressed Sensing (CS) based algorithm is shown - with the aid of Signal to Noise Ratio (SNR) and Mean Square Error (MSE) analysis - to achieve better performance in the joint setting as compared to the separate estimations of impulsive noise and channel impulse response. Numerical simulations confirm the improvements in terms of Mean Square Error (MSE), Bit Error Rate (BER) or spectral efficiency offered by the proposed (joint) scheme.

APA, Harvard, Vancouver, ISO, and other styles

16

Colen, Guilherme Ribeiro. "Resource allocation and time-frequency modulation for power line communication." Universidade Federal de Juiz de Fora, 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/2268.

Full text

Abstract:

Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-07-28T20:18:01Z No. of bitstreams: 1 guilhermeribeirocolen.pdf: 4525385 bytes, checksum: e90d041d33c901d139d8476b96e02078 (MD5) Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2016-07-29T11:52:52Z (GMT) No. of bitstreams: 1 guilhermeribeirocolen.pdf: 4525385 bytes, checksum: e90d041d33c901d139d8476b96e02078 (MD5) Made available in DSpace on 2016-07-29T11:52:52Z (GMT). No. of bitstreams: 1 guilhermeribeirocolen.pdf: 4525385 bytes, checksum: e90d041d33c901d139d8476b96e02078 (MD5) Previous issue date: 2016-03-31 CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Esta tese concentra-se na redução da complexidade computacional e na necessidade de largura de banda associada com a utilização de técnicas de alocação de recursos em sistemas de comuniação via rede elétrica (power line communication – PLC) com base no esquema de multiplexação por divisão ortogonal na frequência (orthogonal frequency division multiplexing – OFDM). Neste contexto, é introduzida a técnica sub-ótima chamada de temporal compressive resource allocation (TCRA). Esta técnica é capaz de explorar a relação existente entre microslots (exploração no domínio do tempo) para reduzir o número de vezes por segundo que alocação de recursos é executada. Além disso, é proposto um novo parâmetro, denominado de banda de coerência da relação sinal ruído normalizada (normalized signal to noise ratio – nSNR) para informar precisamente a planicidade da nSNR. A eficácia deste parâmetro é comparada com a banda de coerência. Diante disto, sua modelagem estatística para ambientes in-home, outdoor de baixa tensão e PLC-wireless é apresentada considerando distribuições de componentes individuais e misturas de Gaussianas. Com base na definição da banda de coerência da nSNR, é descrita a técnica sub-ótima denominada spectral compressive resource allocation (SCRA). Ela explora a relação existente entre os sub-canais adjacentes (exploração no domínio da frequência) para reduzir a dimensão do vector de nSNR, que é a principal informação de entrada para a técnicas de alocação de recursos. Com base no fato de que a geometria de tiles associadas com a transformada de Fourier discreta limita os ganhos associados com o uso da técnica SCRA em conjunto com o esquema OFDM, é introduzido pela primeira vez o esquema chamado multiplexação por divisão ortogonal no tempo-frequência (orthogonal time-frequency division multiplexing – OTFDM). Este esquema se baseia na transformada ortogonal de Stockwell discreta para oferecer diferentes geometrias de tiles e funciona tanto para comunicação de dados em banda de base quanto em banda passante. Os resultados numéricos baseados em canais PLC medidos e no uso de protótipo de transceptores PLC mostram que as técnicas TCRA e SCRA podem trocar redução de complexidade computacional por perda de taxa de transmissão e que economia de complexidade computacional relevante pode ser realizada com baixas perdas na taxa de transmissão. Ademais, os resultados numéricos mostram que o esquema OTFDM pode ser superado pelo esquema de OFDM se a informação de estado de canal não está disponível no lado do transmissor. No entanto, a disponibilidade de tais informações no lado do transmissor permite a utilização do esquema OTFDM em conjunto com a técnica SCRA atingir uma melhoria notável em comparação com o esquema OFDM trabalhando com a técnica SCRA. This dissertation focuses on the computational complexity reduction and on the need for network bandwidth associated with the use of resource allocation techniques in power line communication (PLC) system based on orthogonal frequency division multiplexing (OFDM) scheme. In this context, the so-called temporal compressive resource allocation (TCRA) technique, which is a sub-optimal technique, is introduced. The TCRA is capable of exploiting the existing relationship among microslots (time domain exploitation) to reduce the number of times per second the resource allocation technique is executed. Also, a noval parameter, called nSNR coherence bandwidth, that precisely informs the flatness of the normalized signal to noise ratio (nSNR) is proposed. The effectiveness of this parameter is compared to the coherence bandwidth. Also, its statistical modeling for in-home, outdoor and low-voltage, and hybrid PLC-wireless channels with single-component and Gaussian mixture distributions is presented. Based on the nSNR coherence bandwidth definition, the spectral compressive resource allocation (SCRA) technique, which is a suboptimal technique, is outlined. The SCRA technique exploits the existing relationship among adjacent subchannels (frequency domain exploitation) to reduce the dimensionality of the nSNR vector, which is the main feeding information for the resource allocation technique. Based on the fact that the geometry of the tiles associated with the discrete Fourier transform limits the gains associated with the use of the SCRA together with the OFDM scheme, the so-called orthogonal time-frequency division multiplexing (OTFDM) scheme is, for the first time, introduced. The OTDFM scheme, which is based on the discrete orthogonal Stockwell transform, offers different tile geometries and works in both baseband and passband data communications. Numerical results based on measured PLC channels and the use of prototype of PLC transceivers show that TCRA and SCRA techniques can trade computational complexity reduction with data rate loss and relevant computational complexity savings may be accomplished with low data rate losses. Moreover, the numerical results show that the OTFDM scheme may be outperformed by the OFDM scheme if channel state information is not available at the transmitter side; however, the availability of such information at the transmitter side allow the use of the OTFDM scheme together with the SCRAs achieve remarkable improvement in comparison with OFDM scheme working with the SCRA technique.

APA, Harvard, Vancouver, ISO, and other styles

17

Colen, Guilherme Ribeiro. "Sistemas Clustered-OFDM SISO e MIMO para power line communication." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/4141.

Full text

Abstract:

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-20T15:37:28Z No. of bitstreams: 1 guilhermeribeirocolen.pdf: 1980646 bytes, checksum: 55067533570f6bd2d5a1ab3288db464d (MD5) Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-24T16:49:37Z (GMT) No. of bitstreams: 1 guilhermeribeirocolen.pdf: 1980646 bytes, checksum: 55067533570f6bd2d5a1ab3288db464d (MD5) Made available in DSpace on 2017-04-24T16:49:37Z (GMT). No. of bitstreams: 1 guilhermeribeirocolen.pdf: 1980646 bytes, checksum: 55067533570f6bd2d5a1ab3288db464d (MD5) Previous issue date: 2012-09-06 CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico Esta dissertação tem como objetivo investigar, propor e analisar esquemas para reduzir a complexidade computacional de algoritmos implementados na camada física de transceptores para comunicação de dados via rede elétrica - power line communication (PLC) que são baseados em multiplexação por divisão de frequência ortogonal - orthogonal frequency division multiplexing (OFDM). Inicialmente, o Clustered-OFDM é investigado e analisado com o intuito de reduzir a complexidade computacional dos transceptores PLC. Além disto, uma relação entre complexidade computacional e desempenho é demonstrada para Clustered-OFDM e múltiplo acesso por divisão de frequência ortogonal - orthogonal frequency division multiple access (OFDMA). Os resultados computacionais quantiﬁcam a relação entre complexidade computacional e redução da capacidade do canal para o Clustered-OFDM em comparação com o OFDMA. Em seguida, é proposto e analisado um esquema Clustered-OFDM para comunicação com múltiplas entradas e múltiplas saídas - multiple-input and multiple-output (MIMO) 2×2, denominado MIMO-Clustered-OFDM, que tem como base um código de bloco espacial e temporal. Os resultados de comparações revelam que a proposta MIMO-Clustered-OFDM pode reduzir a capacidade do canal para atingir uma menor complexidade computacional, comparado ao MIMO-OFDMA. Por último, é introduzido um processo para analisar estatisticamente a degradação gerada pelo agrupamento de subportadoras contíguas para o uso de algoritmos de alocação de bits. Um estudo de caso com canais PLC revela que o critério aplicado para agrupar subportadoras contíguas pode proporcionar diferentes níveis de reduções de rendimento, bem como de outras perdas de desempenho se o tamanho do grupo é variável. This thesis aims at investigating, proposing, and analyzing techniques to reduce the computational complexity of algorithms implemented in the physical layer of power line communication (PLC) transceivers which are based on orthogonal frequency division multiplexing (OFDM). First, the clustered-OFDM is investigated and analyzed to reduce computational complexity. Also, a trade between computational complexity and performance is demonstrated for clustered-OFDM and orthogonal frequency division multiple access (OFDMA). Performance results quantify what kind of tradeoﬀ between computational complexity and capacity reduction can be achieved in comparison with OFDMA. Second, a clustered-OFDM scheme for 2×2 multiple input multiple output (MIMO) communication based on space time block code, named MIMO-clustered-OFDM, is proposed and analyzed. Comparison results reveal that the proposed MIMO-clustered-OFDM can trade capacity with computational complexity and can achieve lower computational complexity than MIMO-OFDMA. Third, a procedure to statistically analyze the degradation yielded by the use of granularity for grouping a set of contiguous subcarriers to be used by bitloading algorithm is introduced. A case study with PLC channels reveals that the criterion applied to group of contiguous subcarriers can oﬀer diﬀerent levels of throughput reductions and other performance losses if the size of the group is varied.

APA, Harvard, Vancouver, ISO, and other styles

18

Zhang, C. "Dynamic topology estimation and resource allocation for power line communication." Thesis, University of Liverpool, 2016. http://livrepository.liverpool.ac.uk/3001025/.

Full text

Abstract:

Power line communication (PLC), which uses existing infrastructure of power delivery for data transfer, is regarded as an economical, pervasive and extensive communication solution for smart grid and home broadband applications. One of the challenges of applying communication technologies to power line network lies in acquirement of channel state information (CSI), which is dependent on network topology. Moreover, the knowledge of topology provides a basis for the design of routing protocols and power flow optimization. Therefore, efficient approaches for dynamic topology estimation are highly demanded. While dynamic routing and resource allocation enable high-speed and multi-tasking communication services over power lines. In this thesis, a dynamic topology estimation scheme for PLC is investigated, and a cross-layer routing and resource allocation scheme assisted by dynamic topology estimation is developed to improve the system performance. In the first contribution, a high-resolution and low-complexity dynamic topology estimation scheme for time-varying indoor PLC networks is proposed. The scheme consists of three parts: a) a time-frequency domain reflectometry (TFDR) based path length estimation method, which requires measurement at a single PLC modem and achieves a much higher resolution than the frequency domain reflectometry (FDR) based method; b) a node-by-node greedy algorithm for topology reconstruction, which is much more computationally efficient than the existing peak-by-peak searching algorithm; c) an impulsive noise assisted dynamic topology re-estimation method, which results in a significant complexity reduction over fixed-frequency re-estimation. In the second contribution, a cross-layer routing and resource allocation (RA) scheme assisted by dynamic topology estimation is proposed to optimize the system throughput of indoor PLC network with heterogeneous delay requirements. The proposed scheme provides a multi-layer solution, which conducts the network layer routing based on the result of PHY layer resource allocation which is constrained by the MAC layer queuing delay. With the dynamic topology estimation proposed in the first contribution, the routing can be solved centrally at the source, which is more robust against topology changes compared to distributed solutions. The proposed cross-layer RA scheme consists of subcarrier allocation (SA) to multiple users and power allocation (PA) to subcarriers satisfying heterogeneous delay requirements. It is demonstrated that the proposed centralized routing strategy achieves a much lower packet loss rate (PLR) than a distributed routing scheme; while with optimal RA, the system throughput is significantly improved compared to the routing schemes without considering RA.

APA, Harvard, Vancouver, ISO, and other styles

19

Shrestha, Deep. "Impulsive noise cancellation and channel estimation in power line communication systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667520.

Full text

Abstract:

Power line communication (PLC) is considered as the most viable enabler of the smart grid. PLC exploits the power line infrastructure for data transmission and provides an economical communication backbone to support the requirements of smart grid applications. Though PLC brings a lot of benefits to the smart grid implementation, impairments such as frequency selective attenuation of the high-frequency communication signal, the presence of impulsive noise (IN) and the narrowband interference (NBI) from closely operating wireless communication systems, make the power line a hostile environament for reliable data transmission. Hence, the main objective of this dissertation is to design signal processing algorithms that are specifically tailored to overcome the inevitable impairments in the power line environment. First, we propose a novel IN mitigation scheme for PLC systems. The proposed scheme actively estimates the locations of IN samples and eliminates the effect of IN only from the contaminated samples of the received signal. By doing so, the typical problem encountered while mitigating the IN is avoided by using passive IN power suppression algorithms, where samples besides the ones containing the IN are also affected creating additional distortion in the received signal. Apart from the IN, the PLC transmission is also impaired by NBI. Exploiting the duality of the problem where the IN is impulsive in the time domain and the NBI is impulsive in the frequency domain, an extended IN mitigation algorithm is proposed in order to accurately estimate and effectively cancel both impairments from the received signal. The numerical validation of the proposed schemes shows improved BER performance of PLC systems in the presence of IN and NBI. Secondly, we pay attention to the problem of channel estimation in the power line environment. The presence of IN makes channel estimation challenging for PLC systems. To accurately estimate the channel, two maximumlikelihood (ML) channel estimators for PLC systems are proposed in this thesis. Both ML estimators exploit the estimated IN samples to determine the channel coefficients. Among the proposed channel estimators, one treats the estimated IN as a deterministic quantity, and the other assumes that the estimated IN is a random quantity. The performance of both estimators is analyzed and numerically evaluated to show the superiority of the proposed estimators in comparison to conventional channel estimation strategies in the presence of IN. Furthermore, between the two proposed estimators, the one that is based on the random approach outperforms the deterministic one in all typical PLC scenarios. However, the deterministic approach based estimator can perform consistent channel estimation regardless of the IN behavior with less computational effort and becomes an efficient channel estimation strategy in situations where high computational complexity cannot be afforded. Finally, we propose two ML algorithms to perform a precise IN support detection. The proposed algorithms perform a greedy search of the samples in the received signal that are contaminated by IN. To design such algorithms, statistics defined for deterministic and random ML channel estimators are exploited and two multiple hypothesis tests are built according to Bonferroni and Benjamini and Hochberg design criteria. Among the proposed estimators, the random ML-based approach outperforms the deterministic ML-based approach while detecting the IN support in typical power line environment. Hence, this thesis studies the power line environment for reliable data transmission to support smart grid. The proposed signal processing schemes are robust and allow PLC systems to effectively overcome the major impairments in an active electrical network.The efficient mitigation of IN and NBI and accurate estimation of channel enhances the applicability of PLC to support critical applications that are envisioned for the future electrical power grid. La comunicación a través de líneas de transmisión eléctricas (PLC) se considera uno de los habilitadores principales de la red eléctrica inteligente (smart grid). PLC explota la infraestructura de la red eléctrica para la transmisión de datos y proporciona una red troncal de comunicación económica para poder cumplir con los requisitos de las aplicaciones para smart grids. Si bien la tecnología PLC aporta muchos beneficios a la implementación de la smart grid, los impedimentos, como la atenuación selectiva en frecuencia de la señal de comunicación, la presencia de ruido impulsivo (IN) y las interferencias de banda estrecha (NBI) de los sistemas de comunicación inalámbrica de operación cercana, hacen que la red eléctrica sea un entorno hostil para la transmisión fiable de datos. En este contexto, el objetivo principal de esta tesis es diseñar algoritmos de procesado de señal que estén específicamente diseñados para superar los impedimentos inevitables en el entorno de la red eléctrica como son IN y NBI. Primeramente, proponemos un nuevo esquema de mitigación de IN en sistemas PLC. El esquema propuesto estima activamente las ubicaciones de las muestras de IN y elimina el efecto de IN solo en las muestras contaminadas de la señal recibida. Al hacerlo, el problema típico que se encuentra al mitigar el IN con técnicas tradicionales (donde también se ven afectadas otras muestras que contienen la IN, creando una distorsión adicional en la señal recibida) se puede evitar con la consiguiente mejora del rendimiento. Aparte de IN, los sistemas PLC también se ven afectados por el NBI. Aprovechando la dualidad del problema (el IN es impulsivo en el dominio del tiempo y el NBI es impulsivo en el dominio de la frecuencia), se propone un algoritmo de mitigación de IN ampliado para estimar con precisión y cancelar efectivamente ambas degradaciones de la señal recibida. La validación numérica de los esquemas propuestos muestra un mejor rendimiento en términos de tasa de error de bit (BER) en sistemas PLC con presencia de IN y NBI. En segundo lugar, prestamos atención al problema de la estimación de canal en entornos PLC. La presencia de IN hace que la estimación de canal sea un desafío para los sistemas PLC futuros. En esta tesis, se proponen dos estimadores de canal para sistemas PLC de máxima verosimilitud (ML) para sistemas PLC. Ambos estimadores ML explotan las muestras IN estimadas para determinar los coeficientes del canal. Entre los estimadores de canal propuestos, uno trata la IN estimada como una cantidad determinista, y la otra asume que la IN estimada es una cantidad aleatoria. El rendimiento de ambos estimadores se analiza y se evalúa numéricamente para mostrar la superioridad de los estimadores propuestos en comparación con las estrategias de estimación de canales convencionales en presencia de IN. Además, entre los dos estimadores propuestos, el que se basa en el enfoque aleatorio supera el determinista en escenarios PLC típicos. Sin embargo, el estimador basado en el enfoque determinista puede llevar a cabo una estimación de canal consistente independientemente del comportamiento de la IN con menos esfuerzo computacional y se convierte en una estrategia de estimación de canal eficiente en situaciones donde no es posible disponer de una alta complejidad computacional

APA, Harvard, Vancouver, ISO, and other styles

20

Katayama, Masaaki, Takaya Yamazato, Hiraku Okada, 正昭片山, 敬也山里, and 啓. 岡田. "A mathematical model of noise in narrowband power line communication systems." IEEE, 2006. http://hdl.handle.net/2237/6703.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Katayama, Masaaki. "Introduction to Robust, Reliable, and High-Speed Power-Line Communication Systems." IEICE, 2001. http://hdl.handle.net/2237/7222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Kenarsari, Anhari Amir. "Medium access control protocol design for in-vehicle power line communication." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45394.

Full text

Abstract:

Nowadays, the number of electronic devices in vehicles grows at an exponential rate. For the purpose of communication between these components, several standardized communication protocols such as controller area network (CAN), local interconnect network (LIN), and FlexRay have been developed and are used in vehicles. However, the use of additional wires for data communication still results in a significant increase in the complexity, volume, weight, and cost of wiring harness. Vehicular power line communication (V-PLC) is an interesting alternative that offers numerous advantages. This technology reuses the existing direct current (DC) power network in vehicles as the physical medium for data transmission and allows eliminating some of the wiring harnesses devoted to convey data signals. Hence, This technology can potentially reduce the vehicle cost, weight, and fuel consumption. However, to provide reliable communication over power lines, several challenges need to be addressed. These include impulsive noise produced by electrical devices connected to the bus and frequency-selective behavior of the power line channels introduced by impedance mismatches in the wiring harness. In this thesis, we study research challenges for the medium access control (MAC) protocol design of V-PLC networks. We propose MAC protocols for such systems, which provide fast collision resolution, and perform performance evaluations on these protocols in terms of collision probability, system throughput, and packet delay. Our results show that these protocols outperform the previously proposed protocol, contention detection and resolution (CDR) in all scenarios. We then investigate the effect of carrier sensing errors on the performance of the proposed MAC protocols. We start with addressing the problem of detection of unknown signals in impulsive noise by using a robust detector, which first removes the impulses from the signal and then performs linear signal detection on the cleaned samples. We obtain the network throughput and delay of the proposed protocols as a function of carrier sensing errors. We then suggest a framework for the optimal joint design of the physical layer signal detector and MAC layer protocol.

APA, Harvard, Vancouver, ISO, and other styles

23

Nikfar, Babak [Verfasser], and Han A. J. [Akademischer Betreuer] Vinck. "Multichannel power line communication / Babak Nikfar ; Betreuer: Han A. J. Vinck." Duisburg, 2018. http://d-nb.info/1152210599/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Silveira, Luã Moloise Fernandes da. "CodePLC: um protocolo de network coding MAC para power line communication." Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/4765.

Full text

Abstract:

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-05-30T14:18:27Z No. of bitstreams: 1 luamoloisefernandesdasilveira.pdf: 589211 bytes, checksum: e51494b1c23ff74fa1fc26264147a6a1 (MD5) Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-05-30T15:36:08Z (GMT) No. of bitstreams: 1 luamoloisefernandesdasilveira.pdf: 589211 bytes, checksum: e51494b1c23ff74fa1fc26264147a6a1 (MD5) Made available in DSpace on 2017-05-30T15:36:08Z (GMT). No. of bitstreams: 1 luamoloisefernandesdasilveira.pdf: 589211 bytes, checksum: e51494b1c23ff74fa1fc26264147a6a1 (MD5) Previous issue date: 2016-08-19 Recentemente, Power Line Communication (PLC) tem atraído o interesse de pesquisadores de todo mundo. Contudo, sistemas PLC enfrentam diversos desaﬁos em termos da degradação da qualidade de comunicação de dados. Para superar tais problemas, propomos o CodePLC, um protocolo MAC para PLC que utiliza network coding. Utilizamos um nó intermediário para intermediar a comunicação, armazenar e repassar uma combinação linear de pacotes PLC. Avaliamos o desempenho do CodePLC através da simulação de uma topologia comum em um sistema PLC baseado no esquema Orthogonal Frequency Division Multiplexing whith Time Domain Multiple Access (TDMA-OFDM), sob uma ampla gama de cenários. Em suma, os resultados mostram que, para transmissões do tipo broadcast, o uso de network coding melhora desempenho geral do sistema PLC baseado no TDMA-ODFM. De fato, quando comparado a um sistema que utiliza uma camada MAC PLC multihop stop&wait tradicional, podemos observar um pico de aumento de 110% no valor de pico do goodput. Além disso, nosso protocolo reduz em até 71,4% a ocupação dos buﬀers da rede. Finalmente, CodePLC pode reduz a latência média em até quatro vezes. Recently, power line communication (PLC) has attracted interest of worldwide researchers. However, PLC systems face several challenges which degrade data communication quality. To overcome such issues, we propose CodePLC, a network coding PLC MAC protocol. We use a single relay node to intermediate communication, storing and forwarding linear combinations of PLC data packets. We evaluate CodePLC performance through simulations of a common topology for a PLC system based in Orthogonal Frequency Division Multiplexing whith Time Domain Multiple Access (TDMA-OFDM) under a wide range of scenarios. In summary, our results show that in a broadcast like transmission, the use of network coding enhances overall system performance. In fact, when compared to a traditional PLC system using multihop stop&wait MAC layer protocol, we have observed an peak of 110% goodput increase. Moreover, our protocol reduces in 71,4% network occupancy buﬀers. Finally, CodePLC reduces mean latency by four times.

APA, Harvard, Vancouver, ISO, and other styles

25

Costa, Luís Guilherme da Silva. "Non-Adaptive and Adaptive Coupling Circuits for Power Line Communication System." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/6011.

Full text

Abstract:

Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2017-12-21T11:52:32Z No. of bitstreams: 1 luisguilherrmedasilvacosta.pdf: 2910682 bytes, checksum: da61cee3e668dc7356aa3ab54ff0c28c (MD5) Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-12-22T11:58:44Z (GMT) No. of bitstreams: 1 luisguilherrmedasilvacosta.pdf: 2910682 bytes, checksum: da61cee3e668dc7356aa3ab54ff0c28c (MD5) Made available in DSpace on 2017-12-22T11:58:44Z (GMT). No. of bitstreams: 1 luisguilherrmedasilvacosta.pdf: 2910682 bytes, checksum: da61cee3e668dc7356aa3ab54ff0c28c (MD5) Previous issue date: 2017 Esta tese de doutorado apresenta, inicialmente, uma revisão sobre acopladores para power line communication (PLC), utilizados para acoplar o sinal dos transceptores PLC à rede de energia elétrica. As questões predominantes para o projeto de acopladores e, consequentemente, os diferentes tipos de acopladores são discutidos. Uma classificação dos acopladores PLC baseada nos tipos de acoplamentos (capacitivo, indutivo, resistivo e por antenas), níveis de tensão, largura de banda de frequência, modos de propagação e números de conexões com a rede de energia elétrica é apresentada. Em seguida, o projeto de circuitos PLC de acoplamento capacitivo não adaptativos, single input single output (SISO) de baixa tensão para aplicações banda larga e banda estreita são discutidos. O acoplador PLC banda estreita é projetado para a banda de frequência de 9 kHz-500 kHz, enquanto os acopladores banda larga são projetados para a banda de frequência de 1.7-50 MHz, 1.7-100 MHz e 1.7-500 MHz. Além disso, discute-se as especificações e o projeto dos protótipos desses circuitos de acoplamento PLC medindo seus parâmetros de espalhamento. A seguir, é discutida a medida da impedância de acesso da rede de energia elétrica de baixa tensão na banda de frequência 2- 500 MHz, visando apresentar prévio conhecimento da impedância de acesso da rede de energia elétrica no Brasil com base em uma campanha de medição realizada em várias instalações em três cidades brasileiras diferentes. Além disso, é proposto um procedimento para obter um modelo estatístico da impedância de acesso na referida faixa de frequência. Com base em uma série de medidas de impedâncias de acesso da rede de energia elétrica e critérios para a escolha de modelos estatísticos, esta tese sugere duas distribuições para modelar as componentes resistência e reatância da impedância de acesso da rede de energia elétrica. Uma vez que, os parâmetros de tais modelos mudam com a frequência e que a impedância de acesso é um processo aleatório no domínio da frequência, um modelo simples para gerar amostras em função desse processo aleatório, que leva em consideração as distribuições sugeridas, é detalhado. Por fim, é proposto um circuito de acoplamento adaptativo PLC, capacitivo, SISO de baixa tensão. Estes circuitos de acoplamento adaptativos usam três diferentes filtros analógicos passa-baixa com diferentes impedâncias de entrada. A impedância de entrada de cada filtro analógico é projetado de acordo com os valores obtidos através da campanha de medição, e a impedância de saída é projetada para 50 Ω. A escolha do filtro analógico que proporciona melhor casamento de impedância com a rede de energia elétrica é obtido por um microcontrolador, que através de um conversor analógico digital, monitora a tensão fornecida por um circuito que mede a potência dos sinais injetados nos acopladores PLC pelos transceptores PLC. A monitoração da potência é realizada continuamente pelo conversor analógico digital do microcontrolador que escolhe qual o filtro analógico proporciona o melhor casamento de impedância com a rede de energia elétrica e comuta os filtros analógicos através de uma chave de analógica conectando os transceptores PLC a rede de energia elétrica através dos acopladores PLC. Além disso, as medições dos valores do parâmetro de espalhamento S11 confirmam que a componente resistiva da impedância de acesso da rede de energia elétrica apresentou melhor casamento de impedância entre 50 Ω e 100 Ω. Por fim, os valores medidos do parâmetro de espalhamento S12 mostram que a atenuação cresce com o aumento da frequência devido ao comportamento indutivo da rede de energia elétrica. This work outlines a comprehensive review of PLC coupling circuits, which are required for narrowband and broadband PLC transceivers. Prevailing issues that protract the design of couplers and consequently subtended the inventions of different types of couplers are clearly described. Also, it provides a useful classification of PLC couplers based on the type of physical couplings, voltage levels, frequency bandwidth, propagation modes and a number of connections. Next, the focus is on the design of non-adaptive capacitive, SISO and low-voltage (LV) PLC coupling circuits for both broadband and narrowband applications. The narrowband cover the frequency band 9 kHz-500 kHz, while broadband frequency bands are 1.7-50MHz, 1.7-100MHz and 1.7- 500 MHz. Moreover, it discusses the specification and design of the prototypes of the PLC coupling circuits measuring their scattering parameters. The access impedance of Brazilian in-home, broadband and low-voltage electric power grid in the frequency band 2-500 MHz is taken into account. Based on the use of a measurement setup a large measurement campaign that was carried out in several facilities in three different Brazilian cities is discussed. Also, a procedure to obtain a statistical model of the access impedance in the aforementioned broadband frequency is outlined. Based on a number of measured access impedances and well-known criteria for choosing statistical models, two distributions to model the resistance and reactance components of the access impedance are suggested. Due to the fact that the parameters of such models change with the frequency and the access impedance is a random process in the frequency domain, a simple and effective model to generate samples function of such random process, which takes into account the suggested distributions, is addressed. Finally, adaptive capacitive, SISO and LV PLC coupling circuits are proposed for broadband power line communication. These adaptive coupling circuits use three different analog low-pass filter for impedance matching. This filter is an array of analog low-pass irregular filters that separate the input and output signal into three analog low-pass filters, each one matching the impedance between the electric power grid and PLC transceiver. The input impedance of each filter has a different impedance value, chosen according to the impedance of the measurement campaign, and the output impedance is fixed in 50 Ω for all analog low-pass filter. The choice of the analog filter that provides better impedance matching to the electrical power grid is obtained by a microcontroller, which through an analog-to-digital converter (ADC), measure the voltage provided by a circuit that measures the power of the signals injected into the PLC coupling circuit by the PLC transceivers. The power is continuously measured by an ADC of the microcontroller which chooses which analog filter provides the best impedance matching with the electric power grid and switches the analog filters through an analog switcher connecting the PLC transceivers to the electric power grid through the PLC coupling circuit. In addition, the measured values of the scattering parameter S11 show that the best impedance matching occurs when the resistive impedance component of the access impedance is between 50 Ω and 100 Ω . For the scattering parameter S12 it has been found that the attenuation increases as the frequency increases because of the inductive behavior of the electric power grid.

APA, Harvard, Vancouver, ISO, and other styles

26

Hosseinpour, Ali. "Investigation of orthogonal frequency division multiplexing based Power Line Communication systems." Thesis, University of East London, 2015. http://roar.uel.ac.uk/4420/.

Full text

Abstract:

Power Line Communication (PLC) has the potential to become the preferred technique for providing broadband to homes and offices with the advantage of eliminating the need for new wiring infrastructure and reducing the cost. Power line grids, however, present a hostile channel for data communication, since the fundamental purpose of the power line channel was only the transmission of electric power at 50/60 Hz frequencies. The development of PLC systems for providing broadband applications requires an adequate knowledge of the power line channel characteristics. Various types of noise and multipath effects are some of the limitations for power line channels which need to be considered carefully in designing PLC systems. An effect of an impulsive noise characterized with short durations is identified as one of the major impairment in PLC system. Orthogonal Frequency Division Multiplexing (OFDM) technique is one of the modulation approaches which has been regarded as the modulation technique for PLC systems by most researchers in the field and is used in this research study work. This is because it provides high robustness against impulsive noise and minimizes the effects of multipath. In case of impulsive noise affecting the OFDM system, this effect is spread over multiple subcarriers due to Discrete Fourier Transform (DFT) at the receiver. Hence, each of the transmitted communication symbols is only affected by a fraction of the impulsive noise. In order to achieve reliable results for data transmission, a proper power line channel with various noise models must be used in the investigations. In this research study work, a multipath model which has been widely accepted by many researchers in the field and practically proven in the Tanzanian power line system is used as the model for the power line channel. The effects of different scenarios such as variations in direct path length, path number, branch length and load on the channel frequency response are investigated in this research work. Simulation results indicate the suitability of multi-carrier modulation technique such as an OFDM over the power line channels. To represent the actual noise scenario in the power line channel, an impulsive noise and background noise are classified as the two main noise sources. A Middleton class A noise is modelled as an impulsive noise, whereas the background noise is modelled as an Additive White Gaussian Noise (AWGN). The performance of PLC system based on OFDM is investigated under Middleton Class A and AWGN noise scenarios. It is observed that Bit Error Rate (BER) for the impulsive noise is higher than the background noise. Since channel coding can enhance the transmission in a communication system, Block code and convolutional codes have been studied in this research work. The hamming code chosen as a type of the block code, whereas the Trellis Coded Modulation (TCM) selected from the category of the convolutional channel codes and modelled in Matlab2013b. Although TCM code produces improvements in the Signal-to-Noise Ratio (SNR), they do not perform well with Middleton class A noise. A rectangular 16-QAM TCM based on OFDM provides better BER rate compared to the general TCM.

APA, Harvard, Vancouver, ISO, and other styles

27

Sawada, Naoya, Takaya Yamazato, and Masaaki Katayama. "Bit and power allocation for power-line communications under nonwhite and cyclostationary noise environment." IEEE, 2009. http://hdl.handle.net/2237/13974.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Gruber, Florian [Verfasser], Johannes [Akademischer Betreuer] Huber, Johannes [Gutachter] Huber, and Johann [Gutachter] Jäger. "Degradation detection on power lines using power line communication devices / Florian Gruber ; Gutachter: Johannes Huber, Johann Jäger ; Betreuer: Johannes Huber." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1201886759/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Lohani, Satyendra Nath. "Communication Network Analysis in Smart Grid." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-19088.

Full text

Abstract:

With the world suffering from energy crisis, Smart Grid is the expanding research topic that deals vigorously with the current problems. It promotes decentralized renewable energy generation system, participate many local energy producers to energy market, adds vehicle to grid (V2G), minimize the energy loss in the electrical system, and participate many active consumers to the real market. It is an emerging project that needs an expert from many fields, thus it opens door of opportunities for many people around the globe. The present thesis deals with the communication scenario in smart grid. Communication is the backbone of Smart Grid and the thesis tries to highlight the available communication technologies for smart grid application. The thesis discuss most profitable communication technologies used for this purpose which are power line communication and wireless communication, in which power line communication aspects and characteristics are covered more than wireless communication for its use are seen more in upcoming days. In all the thesis will outline the opportunities and challenges of power line communication and wireless communication for smart grid application.

APA, Harvard, Vancouver, ISO, and other styles

30

Cosic, Aleksandar J. "Digital power line communication on EHV power lines." Thesis, 1991. https://vuir.vu.edu.au/15585/.

Full text

Abstract:

Digital modulation can be used on PLC communication links to increase system capacity. The improved noise and interference capability of digital modulation can lead to reduced guard distances between co-channel users and can more than offset the additional bandwidth requirements of digital modulation. QAM-16 is proposed as a suitable modulation scheme. In the example given this modulation leads to a modest capacity improvement of 10% when ADPCM is used for voice coding. This improves dramatically with the use of more advanced voice coders. Simulations are performed on a 500 KV line to determine the effect of reflections and modal propagation on the equalization requirements of the modem. The major distortions are caused by the applied filtering within the modem, and the reflections on the transmission path, the later are particularly evident at low carrier frequencies, and when the line lengths are short. A PLC bandlimited modem, whose frequency is user selectable within the PLC spectrum has been designed and tested. Particular emphasis is placed on the adaptive equalisation algorithm, that is selected in the modem design to combat distortions due to the imperfections of the modem and reflections on the power line. Most of the modem functions were implemented using DSP techniques.

APA, Harvard, Vancouver, ISO, and other styles

31

Zwane, Fulatsa. "Power line communication channel modelling." Thesis, 2014. http://hdl.handle.net/10413/11290.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Tseng, Hsing-Ching, and 曾星璟. "AC Power Energy Monitoring with Power Line Communication." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/43625650248565925727.

Full text

Abstract:

碩士 中華大學 電機工程學系 105 In recent years, global warming and energy crisis have become increasingly serious. Most of our energy depends on imported petrochemical raw materials and nuclear, which resulting in a lot of environmental pollution and greenhouse effect. Because the industrial energy consumption is more than half of total energy. Industrial energy efficiency should be improved immediately. In this thesis, the system architecture and requirements are discussed as first step, and then divided the system into two parts master and slave. The PLC and the Ethernet are used for communication, and current measurement is using current transformer. Their specifications should be elaborated in detail. Embedded chip is used as a core for slave hardware, and this chip controls the communication and processing. A particular embedded chip used to measure the energy, and then the measured data send to the core by SPI. After the data had computed by the chip, and send it to master through the PLC. Embedded chip also adopted by master hardware as a core. After received a command within a package from PC by way of Ethernet. Then the slave interpreted the command to execute the related measurement, the measured information will be sent to the master through the PLC. At last, the master transferred to the PC through the Ethernet. The measurement and the communication are complicated processes and have to plan, such as scenario and communication protocol. Then following the plan design the program as firmware. After completed circuit board constructing and testing, it had installed in the application field without additional wiring. The system can collect the information that the correct power data is measured form each Slave.

APA, Harvard, Vancouver, ISO, and other styles

33

Ko, Shun-Yang, and 柯舜揚. "Power line communication sensor network receiver." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/32655760970963286416.

Full text

Abstract:

碩士 國立臺灣大學 電機工程學研究所 96 This thesis presents the design and implements of the Power line communication receiver adapted to CENCLEC BS EN 50065-1 standard in TSMC 0.35 2P4M CMOS process. The main function, lowpass filter, is verified by two chips. One is the 3rd-order chebyshev LowPass filter. The filter type of the 3rd-order chebyshev LowPass filter is a leapfrog structure, and cascade method is applied to implement this high-order filter. According to measurement results, the gain level of the filter is 0dB. The f-3dB is 2.28MHz. The die area is 1.086 x 0.947 mm2 and the power consumption is 8.413mW. The other chip is designed for power line communication receiver which is comprised of an AGC circuit, a thirteenth-order Butterworth LowPass filter, an Equalizer, a peak detector, and a comparator. The f-3dB of the thirteenth-order Butterworth LowPass filter realized by Sallen-Key Biquad cascade is 125K Hz. The die area is 1.914 x 1.853 mm2 and the power consumption is 21.21mW.

APA, Harvard, Vancouver, ISO, and other styles

34

Ko, Shun-Yang. "Power line communication sensor network receiver." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2507200812595900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Meng-Jhong, Siao. "Power-Line Communication Employing Power Allocation and PAPR reduction." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2007200621501800.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Siao, Meng-Jhong, and 蕭盟鐘. "Power-Line Communication Employing Power Allocation and PAPR reduction." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/01954513437010183646.

Full text

Abstract:

碩士 國立臺灣大學 電信工程學研究所 94 With the improvement on communication technology, high speed data transmission through power-line comes true. More and more studying and research focus on power- line communications. In this thesis, we design power-line communication system based on some speci - cation provided by HomePlug1.0 and HomePlug AV. The Dostert power-line channel model is chosen to simulate the power line environment. We consider several bitload- ing algorithms. The e ect of high peak to average power ratio PAPR on OFDM and the associated PAPR reduction methods is also considered.

APA, Harvard, Vancouver, ISO, and other styles

37

Tai, Jen-Tsang, and 戴仁倉. "Addressable Lighting System using Power Line communication." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/23594682212698031370.

Full text

Abstract:

碩士 中華大學 電機工程學系(所) 98 Global warming is more serious in the past decade. Human needed to be paying more attention on environment change, because here is our planet. We have to think that how to save energy and reduce CO2. Lighting control is one of save energy solution. Using addressable microcontroller to send modulation signal via AC power lines will be a cheaper way as compared to using additional signal lines. This technology can also save more additional wiring time. In this thesis, how to use PLC (Power Line Communication) technology to control lighting system will be explained in detail, including data frame definitions and modulation/demodulation schemes. Used oscilloscope to make sure signals which coupling on power line. After that using PWM technology transfer digital signal to DC voltage leave to control ballast, which will be drive the lamp. To saving energy and our planet, we should choose better solution.

APA, Harvard, Vancouver, ISO, and other styles

38

Wen-Hao, Hsieh, and 謝文豪. "Short-distance DC Power Line Communication Module." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/agsdkx.

Full text

Abstract:

碩士 逢甲大學 資訊電機工程碩士在職學位學程 107 The purpose of this study is to improve the internal connection and architecture of various electrical appliances by using short-distance DC power communication to simplify or even reduce the cost of the original cumbersome internal communication structure. Most of the existing electrical systems mainly controlling the entire system using only one microprocessor. It seems to be able to minimize the cost of parts, but when the loading and signals is increased, the wires connected to operation panel and the loading controller will be increased. Therefore, the longer signal line or the analog signal is more likely to be disturbed. If the whole electrical system is modified to have a separate control of the control panel and the motherboard, the exchange of information and control signals only through the power line will greatly reduce the chances of being disturbed and using the wire. This study using the short-distance DC power communication module to simulate the control site and the host site. The power cord is used to transmit signal between the two sites. The AM carrier is used on the power line and the signal is processed through the high-pass filter to achieve exchanging signal between the two sites.

APA, Harvard, Vancouver, ISO, and other styles

39

Huang, Shun-Yu, and 黃順煜. "Integrated Power Line Communication and Power Driver for Automobile Applications." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/97988717846447596626.

Full text

Abstract:

碩士 國立交通大學 電控工程研究所 100 The thesis proposes an integrated communication (PLC) and power driver for the automobile application. With a chip, we can replace the four communication lines. For the background noise, the direct sequence spread spectrum (DSSS) technology is used on a power line of DC 12V. The chip rate is 8.33 Mbps and data rate is 757.57 Kbps for coding by Barker code. We design the CDR by using Barker code’s correlation. The pulse-width modulator is controlled by the received signal. Most of the electrical components in an automobile can be driven by the power MOS. The overall system includes the transmitter, which uses FPGA to realize, and the receiver. Through an AC-coupling circuit, TX can send signals to the power line, and the received signals in RX are used to drive the LED and the motor. The chip is realized in tsmc 0.25 um process.

APA, Harvard, Vancouver, ISO, and other styles

40

CHEN, MAO-SONG, and 陳茂松. "A Research on Electric Power Meter with Power Line Communication." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/60780950786060719856.

Full text

Abstract:

碩士 中華大學 電機工程學系 104 In recent years, human increasing emphasis on energy issues like as global warming, greenhouse worsening. First, we must grasp the information of energy consumption if we want to save energy. Through a power meter we can obtain information of electrical power consumption. Transmit the information to the console with the power lines communication. The information will be analyzed after the console received. Then make the decision of re-deployment of electricity to achieve energy-saving. The thesis designed an electrical power meter with power line communication. We use a micro-resistor as current sensing to retrieve current that pass through load of the loop. We also use a set of attenuator to extract the voltage across the load. Then send these two original data into two ADCs' input-pins of System on a Chip (SoC). The SoC will convert the analog signal into digital signal, then calculate a set of parameter, such as the wattage, power factor, frequency of the power, and power consumption accumulation. These parameters will send to the master through the original power lines. The Wi-Fi or Ethernet can be used for communication between PC and the master. The Wi-Fi or Ethernet can be used for communication between PC and the master. A power management system is contained in the PC. The power management system can make integrated analysis. The results can be used to make decisions of electrical energy deployment to achieve energy-saving.

APA, Harvard, Vancouver, ISO, and other styles

41

ZHANG, YUAN-HUA, and 張原華. "Design and Implementation of a Power Line Communication System on Low-voltage DC Power Line." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4fu3zp.

Full text

Abstract:

碩士 南臺科技大學 電子工程系 107 Power-Line Communication (PLC) technology has been applied to remote control and signal sensing since the 20th century. In 2001, PLC was used to realize broadband communication in power line networks. This technology enables data being sent over existing power cables and currently most companies offer the last mile solutions with an AC-based PLC scheme. The applications of DC-based PLC are relatively less. This thesis designs and implements a power line communication transceiver on a DC 12 to 24 volt power line. The proposed DC-based PLC transceiver is modularly designed and consists of signal processing and control (SPC) module, analog front-end (AFE) module and power supply (PS) module. The SPC module uses the STM32F405 microcontroller with digital signal processing (DSP) function as control and computation core to implement the orthogonal frequency division multiplexing (OFDM) modulation technology. The interpolation algorithm and channel estimation are carried out to fix the phase distortion of received data. In this module, the input and output signals are processed with ADC and DAC, receptively. In the AFE module, OFDM signal is preprocessed by a fourth-order band-pass filter. And the half-bridge current driver provides the processed signal with sufficient current for being coupled into the DC power line. When the AFE module receives the signal, the fourth-order band-pass filter is used to filter out the noise and DC components from power line. The gain control and voltage clamping of the signal are fulfilled by the two inverting amplifiers formed with LT1816 and TL072 and then the processed signals are demodulated. The PS module uses a RC-Pi type power filter to filter out the signals from the DC power line, and then utilizes LM317A for voltage stabilization to obtain a DC power to supply the SPC and AFE modules. In this thesis, we integrate the aforementioned modules and program firmware to realize a set of transceivers for DC 12 to 24 volt power line communication. The transmission signals are in the frequency band of 42 to 58 kHz and the data rate achieves 24 kbps. The signal transmission performance of the implemented DC-based PLC transceiver is verified on a DC 12 to 24 volt power line through texts and images being sent and received successfully.

APA, Harvard, Vancouver, ISO, and other styles

42

Chung-Hung, Lin. "A study on coding of power line communication." 2005. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2707200515453200.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Lin, Chung-Hung, and 林均鴻. "A study on coding of power line communication." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/84212003090259486647.

Full text

Abstract:

碩士 國立臺灣大學 電信工程學研究所 93 By the spread of Internet, home networking attracts much attention of people. The indoor power lines are potentially wide-spread, convenient and inexpensive “no new wire” candidate medium for data transmission. However, there are many technical problems to realize power line communication system with high rate and high reliability. After all, power lines are not devised for communication. In the thesis, we study the characteristics of power line channel like multipath effect and various types of noise. We choose four multipath channel models and take Middleton’s Class A noise as noise model in our simulation. And based on some HomePlug 1.0 Specification, we compare the performance of several effective coding on power line channel. We find that turbo code perform poorly as expected in some kind of channels, but we could always get better performance by using trellis codes with larger free distances in all channels.

APA, Harvard, Vancouver, ISO, and other styles

44

劉穎昌. "Study of power line communication in Home network." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/06817097207657008913.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Chang, Yu-Wei, and 張育維. "Implementation of the broadband Power Line Communication system." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/5zgwjg.

Full text

Abstract:

碩士 國立中山大學 資訊工程學系研究所 103 Digital home has been mentioned a lot in recent years. We can connect appliances through the internet to provide new services such as home care, digital entertainment, power management, and home safety, etc. Power Line Communication plays an important role in it. Power Line Communication uses the existing wires to transmit data, so there is no need to put extra wires. This thesis uses cell-based design flow to implement the broadband Power Line Communication system. The transmitter includes scrambler, convolutional encoder, block interleaver, quadrature amplitude modulator, and add cyclic prefix. The receiver includes remove cyclic prefix, quadrature amplitude demodulator, block deinterleaver, convolutional decoder, and descrambler. The experiment result shows that under different noisy channel, this design still has error correction ability. When signal to noise ratio is 0dB, bit error rate is 0.457. When signal to noise ratio is 10dB, bit error rate is 0.0001. This thesis uses TSMC 90nm process. The total area is 94188 um2, the power dissipation is 8.85mW.

APA, Harvard, Vancouver, ISO, and other styles

46

Cheng, Kwang-Hong, and 鄭光宏. "A Multiple-Access Design for Power-Line Communication." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/10645287744683893601.

Full text

Abstract:

碩士 國立臺灣大學 電信工程學研究所 95 Power-Line Communication(PLC) uses existing electric lines to transmit broadband signals in residential networking environments. Being inexpensive and convenient, PLC is a potential solution to the last-mile access problem. However, the transmission environment in PLC is quite hostile since power-lines are not initially designed for data transmission. Our work deals with a multiple-access system for PLC applications. Unlike the specifications defned in HomePlug 1.0 and HomePlug AV, the proposed system consists of the interleave-division multiple access(IDMA) scheme and the well-known OFDM transceiver. To enhance the system performance, we need to use bit-loading to match the PLC channel which consists of subchannels with great variety. We also develop a bit-loading scheme which can significantly improve the system performance since conventional bit-loading algorithms are not appropriate for IDMA-OFDM systems.

APA, Harvard, Vancouver, ISO, and other styles

47

Lee, Wei-Xian, and 李威賢. "A Measurement Study of Power Line Communication Systems." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/96143710783024660005.

Full text

Abstract:

碩士 國立臺灣師範大學 資訊工程研究所 100 In this thesis, we investigate the network path characteristic of power line communication (PLC) under HomePlug AV standard by experiments. First, we analyze the feature of PLC according to the specification of the HomePlug and the real products which are implemented by different factories. Based on the feature, the measurement issue in the kind of multi-rate network system is need to be solved. For the issue, HTMProbe is proposed to probe the minimum sending rate in highest transmission mode and at the same time probe the link capacity and available bandwidth. Then in the experiment environment, we use the existing well-known measurement tools to probe the link capacity of PLC, and find their limitations. We test HTMProbe in our testbed and find that is provides good estimates of the link capacity, available bandwidth and the minimum sending rate to overcome the limitations. Using power line as the media to transmit, it will be interfered by several electronic devices and obstruct the performance of network. We test several electronic devices, and classify them by the level of interference according to the download rate, and investigate the effect of different level of interference and the relative position between electronic devices and PLC devices. Final, we test the electromagnetic interference filter in the experiment environment to improve the PLC performance.

APA, Harvard, Vancouver, ISO, and other styles

48

Lee, Kuo-wei, and 李國維. "OFDM Power Line Communication for Automatic Meter Management." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/21892411453801329831.

Full text

Abstract:

碩士 國立臺灣科技大學 電子工程系 98 The powerline network is the biggest network around the world. Most of the electric device will need to connect to the powerline while we using it, except the mobile device. The powerline is the existence of abundant pre-installed wires and wall outlets. We will discuss the OFDM power line communication system base the define in PRIME 1.3 Draft PHY layer specification. In this thesis , we will build a matlab model to simulate the whole system operation, and use the simulation result as an reference when we build the hardware in the future. In the PRIME, it include the synchronization circuit ,data coding. Although the PRIME specification is only a draft version, it is the first one of the protocol specification of power line communication. We will been focus in building PRIME system in Matlab code, and considering the feasibility while we construct it.

APA, Harvard, Vancouver, ISO, and other styles

49

Chou, Zong-Han, and 周宗漢. "Transceiver implementation for low-speed power line communication." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/03803768117429051623.

Full text

Abstract:

碩士 國立臺灣大學 電機工程學研究所 97 With the development of semiconductor technology, many electronic products 1re integrated with CMOS circuit. This thesis uses TSMC 0.35 micron 2P4M CMOS technology to implement a transceiver compatible with BS EN50065-1 class C standard. This work included two chips. One is an automatic gain control amplifier with fifty-six voltage gains, and the other is a power line communication transceiver with FSK modulation. The feed-forward automatic gain control amplifier is composed of programmable gain amplifier, peak detector, analog-to-digital converter, and control unit. The die area is 1.41mm × 1.64mm, and the power consumption is 2.12mW. On the other hand, the power line communication transceiver which is compatible with BS EN50065-1 class C standard included FSK signal generator, programmable gain amplifier, low pass filter, peak detector, and hysteresis comparator with total die area of 1.68mm × 1.929mm, and the power consumption is 43.26mW..

APA, Harvard, Vancouver, ISO, and other styles

50

Cheng, Kwang-Hong. "A Multiple-Access Design for Power-Line Communication." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-0907200713052200.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Power Line Communication'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles