Log in

Relevant bibliographies by topics / Networks with underlay cognitive nodes / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Networks with underlay cognitive nodes.

Dissertations / Theses on the topic 'Networks with underlay cognitive nodes'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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

Select a source type:

Consult the top 24 dissertations / theses for your research on the topic 'Networks with underlay cognitive nodes.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Chakraborty, Pratik. "Improving secrecy and spectral utilization efficiency in networks with underlay cognitive nodes." Thesis, IIT Delhi, 2018. http://eprint.iitd.ac.in:80//handle/2074/8043.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Jasbi, Fahimeh Jafarali. "Hybrid overlay/underlay cognitive radio networks with MC-CDMA." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/hybrid-overlayunderlay-cognitive-radio-networks-with-mccdma(435d45a5-82c0-4507-9c53-23aa248988c9).html.

Full text

Abstract:

There has been a growing demand for wireless communication services in the past few years. Recent reports reveal that the demand will not only increase in the number of subscribers but also in more diverse applications such as Machine-to-Machine (M2M) communications and the Internet of Things. With such demand for capacity increase, there is a necessity to shift from today’s Static Frequency Allocation (SFA) to Dynamic Spectrum Access (DSA). The change will make efficient use of spectrum by utilizing the unused parts in different times, frequencies and spaces. With this regard, cognitive radio

APA, Harvard, Vancouver, ISO, and other styles

3

Al-Hraishawi, Hayder Abed Hussein. "DESIGN AND ANALYSIS OF COGNITIVE MASSIVE MIMO NETWORKS WITH UNDERLAY SPECTRUM SHARING." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/dissertations/1412.

Full text

Abstract:

Recently, massive multiple-input multiple-output (MIMO) systems have gained significant attention as a new network architecture to not only achieving unprecedented spectral and energy efficiencies, but also to alleviating propagation losses and inter-user/inter-cell interference. Therefore, massive MIMO has been identified as one of the key candidate technologies for the 5th generation wireless standard. This dissertation thus focuses on (1) developing a performance analysis framework for cognitive massive MIMO systems by investigating the uplink transmissions of multi-cell multi-user massiv

APA, Harvard, Vancouver, ISO, and other styles

4

Kumar, Bhupendra. "Performance of an underlay cooperative cognitive networks with a buffer-aided-relay." Thesis, IIT, Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8070.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Kabiri, Charles. "On the Performance of Underlay Cognitive Radio Networks with Interference Constraints and Relaying." Doctoral thesis, Blekinge Tekniska Högskola [bth.se], Faculty of Computing - Department of Communication Systems, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00609.

Full text

Abstract:

Efficiently allocating the scarce and expensive radio resources is a key challenge for advanced radio communication systems. To this end, cognitive radio (CR) has emerged as a promising solution which can offer considerable improvements in spectrum utilization. Furthermore, cooperative communication is a concept proposed to obtain spatial diversity gains through relays without requiring multiple antennas. To benefit from both CR and cooperative communications, a combination of CR networks (CRNs) with cooperative relaying referred to as cognitive cooperative relay networks (CCRNs) has recently

APA, Harvard, Vancouver, ISO, and other styles

6

Tran, Hung. "Performance Analysis of Cognitive Radio Networks with Interference Constraints." Doctoral thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00550.

Full text

Abstract:

To support the rapidly increasing number of mobile users and mobile multimedia services, and the related demands for bandwidth, wireless communication technology is facing a potentially scarcity of radio spectrum resources. However, spectrum measurement campaigns have shown that the shortage of radio spectrum is due to inefficient usage and inflexible spectrum allocation policies. Thus, to be able to meet the requirements of bandwidth and spectrum utilization, spectrum underlay access, one of the techniques in cognitive radio networks (CRNs), has been proposed as a frontier solution to deal wi

APA, Harvard, Vancouver, ISO, and other styles

7

Sibomana, Louis. "Performance Analysis of Cognitive Radio Networks under Spectrum Sharing and Security Constraints." Doctoral thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11739.

Full text

Abstract:

The cognitive radio network (CRN) concept has been proposed as a solution to the growing demand and underutilization of the radio spectrum. To improve the radio spectrum utilization, CRN technology allows the coexistence of licensed and unlicensed systems over the same spectrum. In an underlay spectrum sharing system, secondary users (SUs) transmit simultaneously with the primary users (PUs) in the same frequency band given that the interference caused by the SU to the PU remains below a tolerable interference limit. Besides the transmission power limitation, a secondary network is subject to

APA, Harvard, Vancouver, ISO, and other styles

8

Chu, Thi My Chinh. "On the Performance Assessment of Advanced Cognitive Radio Networks." Doctoral thesis, Blekinge Tekniska Högskola [bth.se], Faculty of Computing - Department of Communication Systems, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00611.

Full text

Abstract:

Due to the rapid development of wireless communications together with the inflexibility of the current spectrum allocation policy, radio spectrum becomes more and more exhausted. One of the critical challenges of wireless communication systems is to efficiently utilize the limited frequency resources to be able to support the growing demand of high data rate wireless services. As a promising solution, cognitive radios have been suggested to deal with the scarcity and under-utilization of radio spectrum. The basic idea behind cognitive radios is to allow unlicensed users, also called secondary

APA, Harvard, Vancouver, ISO, and other styles

9

Devanarayana, Chamara. "Spectrum access in cognitive radio networks based on prediction and estimation." EURASIP Journal on Wireless Communications and Networking, 2011. http://hdl.handle.net/1993/31605.

Full text

Abstract:

In the literature, Cognitive radio (CR) as well as full-duplex (FD) communication technologies are proposed to increase the spectrum efficiency. The main contribution of this thesis is to introduce prediction and estimation techniques with low control overhead, and use the predicted or estimated information in resource allocation in CR networks, both in the overlay networks and the underlay networks. Prediction and estimation are important in increasing the data rate and keeping the interference at a low level. In the overlay scheme, I modeled the primary user (PU) traffic characteristi

APA, Harvard, Vancouver, ISO, and other styles

10

Samarasekera, Andawattage Chaminda Janaka. "The Performance of Dual-Hop Decode-and-Forward Underlay Cognitive Relay Networks with Interference Power Constraints over Weibull Fading Channels." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3201.

Full text

Abstract:

With the rapid development and the increasing use of wireless devices, spectrum scarcity has become a problem. The higher frequencies have bad propagation characteristics and the lower frequencies have low data rates, therefore the radio spectrum that is available for efficient wireless transmission is a limited resource. One of the proposed solutions for this problem is cognitive relay networks (CRNs), where cognitive radio is combined with a cooperative spectrum sharing system to increase the spectrum utilization. In this thesis, the outage probability performances of underlay CRNs with inte

APA, Harvard, Vancouver, ISO, and other styles

11

Lu, Lu. "Spectral-efficient design in modern wireless communications networks." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53902.

Full text

Abstract:

We investigate spectral-efficient design and develop novel schemes to improve spectral efficiency of the modern wireless communications networks. Nowadays, more and more spectrum resources are required to support various high-data-rate applications while spectrum resources are limited. Moreover, static allocation and exclusive access in current spectrum assignment policy caused a lot of licensed spectrum bands to be underutilized. To deal with the problem, cognitive radio (CR) has been developed, which allows unlicensed/secondary users to transmit with licensed/primary users as long as the for

APA, Harvard, Vancouver, ISO, and other styles

12

Janghel, Komal. "Performance analysis of underlay cognitive radio networks with energy harvesting nodes." Thesis, 2018. http://localhost:8080/xmlui/handle/12345678/7661.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Moteka, Leutsoa. "User pairing and power allocation in underlay cognitive NOMA networks." Thesis, 2020. https://hdl.handle.net/10539/31115.

Full text

Abstract:

A dissertation submitted in the fulfilment of the requirements for the degree of Master of Science in Engineering (MSc. Eng.) in the School of Electrical and Information Engineering in the Faculty of Engineering and the Built Environment, University of the Witwatersrand, 2020<br>The unique structure of Non-Orthogonal Multiple Access (NOMA), a candidate for multiple access techniques for fifth-generation mobile networks, poses formidable design challenges when the number of users in the network rises. Fifth generation networks, however, demand hyper connected societies with phenomenal num

APA, Harvard, Vancouver, ISO, and other styles

14

Ao, Weng-Chon, and 歐永俊. "Phase Transition Analysis for Underlay Heterogeneous Cognitive Radio Networks with Applications." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/23981309145885872180.

Full text

Abstract:

碩士<br>臺灣大學<br>電信工程學研究所<br>98<br>Characterizing the topology and therefore fundamental limit is a must to establish effective cognitive radio networking (CRN). However, there lacks complete understanding of the relationship among connectivity, interference, latency and other system parameters of the underlay CRN. To clarify this complication, by employing tools from both percolation theory and stochastic geometry, we provide a novel parametrization of underlay secondary ad hoc CRN wherein the secondary network is regarded as an operating point in the phase space in both cases with and with

APA, Harvard, Vancouver, ISO, and other styles

15

Yu, Hao-Ting, and 游皓婷. "Lifetime Maximization of Secondary Cooperative Systems in Underlay Cognitive Radio Networks." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/14507104935542138794.

Full text

Abstract:

碩士<br>國立中山大學<br>通訊工程研究所<br>100<br>In this thesis, we consider cognitive radio networks (CRN) combined with cooperative transmission, and investigate relay selection and power allocation strategies to maximize network lifetime (NLT). Cognitive radio network enhances spectrum efficiency resource by exploiting capabilities of cognition, learning and coordination against insufficient spectrum resource. In underlay cognitive radio network, however, transmitted energy of secondary user is constrained by interference level observed at primary user (PU). Though cooperation among secondary users (SU),

APA, Harvard, Vancouver, ISO, and other styles

16

Song, Yao. "Threshold Based Opportunistic Scheduling of Secondary Users in Underlay Cognitive Radio Networks." Thesis, 2011. http://hdl.handle.net/10754/205811.

Full text

Abstract:

In underlay cognitive radio networks, secondary users can share the spectrum with primary users as long as the interference caused by the secondary users to primary users is below a certain predetermined threshold. It is reasonable to assume that there is always a large pool of secondary users trying to access the channel, which can be occupied by only one secondary user at a given time. As a result, a multi-user scheduling problem arises among the secondary users. In this thesis, by manipulating basic schemes based on selective multi-user diversity, normalized thresholding, transmission power

APA, Harvard, Vancouver, ISO, and other styles

17

Sainath, B. "Optimal Amplify-And-Forward Relaying For Cooperative Communications And Underlay Cognitive Radio." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/2650.

Full text

Abstract:

Relay-assisted cooperative communication exploits spatial diversity to combat wireless fading, and is an appealing technology for next generation wireless systems. Several relay cooperation protocols have been proposed in the literature. In amplify-and-forward (AF)relaying, which is the focus of this thesis, the relay amplifies the signal it receives from the source and forwards it to the destination. AF has been extensively studied in the literature on account of its simplicity since the relay does not need to decode the received signal. We propose a novel optimal relaying policy for two-ho

APA, Harvard, Vancouver, ISO, and other styles

18

Sainath, B. "Optimal Amplify-And-Forward Relaying For Cooperative Communications And Underlay Cognitive Radio." Thesis, 2015. http://etd.iisc.ernet.in/handle/2005/2650.

Full text

Abstract:

Relay-assisted cooperative communication exploits spatial diversity to combat wireless fading, and is an appealing technology for next generation wireless systems. Several relay cooperation protocols have been proposed in the literature. In amplify-and-forward (AF)relaying, which is the focus of this thesis, the relay amplifies the signal it receives from the source and forwards it to the destination. AF has been extensively studied in the literature on account of its simplicity since the relay does not need to decode the received signal. We propose a novel optimal relaying policy for two-hop

APA, Harvard, Vancouver, ISO, and other styles

19

Dadallage, Suren Tharanga Darshana. "Joint beamforming, channel and power allocation in multi-user and multi-channel underlay MISO cognitive radio networks." 2014. http://hdl.handle.net/1993/30077.

Full text

Abstract:

In this thesis, we consider joint beamforming, power, and channel allocation in a multi-user and multi-channel underlay cognitive radio network (CRN). In this system, beamforming is implemented at each SU-TX to minimize the co-channel interference. The formulated joint optimization problem is a non-convex, mixed integer nonlinear programming (MINLP) problem. We propose a solution which consists of two stages. At first, given a channel allocation, a feasible solutions for power and beamforming vectors are derived by converting the problem into a convex form with an introduced optimal auxiliary

APA, Harvard, Vancouver, ISO, and other styles

20

陳韋豪. "Optimal Probabilistic Power Allocation For Underlay Cognitive Radio Networks with Outage Constraint and One-bit Side Information." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/00418626018213841944.

Full text

Abstract:

碩士<br>國立清華大學<br>通訊工程研究所<br>101<br>In this paper, we study a spectrum sharing based cognitive radio network (CRN) where $N$ secondary users (SUs) share the same spectrum with a primary user (PU) over block fading channels. We assume complete perfect channel state information (CSI) at the secondary transmitters while only local instantaneous CSI is assumed at the primary transmitter. The PU is assumed to adopt an ON-OFF power control policy and convey this one-bit side information to all secondary transmitters. Based on these assumptions, we investigate the optimal probabilistic power allocation

APA, Harvard, Vancouver, ISO, and other styles

21

Jamal, Nadia. "Throughput Scaling Laws in Point-to-Multipoint Cognitive Networks." Thesis, 2010. http://hdl.handle.net/10012/5289.

Full text

Abstract:

Simultaneous operation of different wireless applications in the same geographical region and the same frequency band gives rise to undesired interference issues. Since licensed (primary) applications have been granted priority access to the frequency spectrum, unlicensed (secondary) services should avoid imposing interference on the primary system. In other words, secondary system’s activity in the same bands should be in a controlled fashion so that the primary system maintains its quality of service (QoS) requirements. In this thesis, we consider collocated point-to-multipoint primary and s

APA, Harvard, Vancouver, ISO, and other styles

22

Venugopalakrishna, Y. R. "Data Fusion Based Physical Layer Protocols for Cognitive Radio Applications." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2683.

Full text

Abstract:

This thesis proposes and analyzes data fusion algorithms that operate on the physical layer of a wireless sensor network, in the context of three applications of cognitive radios: 1. Cooperative spectrum sensing via binary consensus; 2. Multiple transmitter localization and communication footprint identification; 3.Target self-localization using beacon nodes. For the first application, a co-phasing based data combining scheme is studied under imperfect channel knowledge. The evolution of network consensus state is modeled as a Markov chain, and the average transition probability matrix is

APA, Harvard, Vancouver, ISO, and other styles

23

Venugopalakrishna, Y. R. "Data Fusion Based Physical Layer Protocols for Cognitive Radio Applications." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2683.

Full text

Abstract:

This thesis proposes and analyzes data fusion algorithms that operate on the physical layer of a wireless sensor network, in the context of three applications of cognitive radios: 1. Cooperative spectrum sensing via binary consensus; 2. Multiple transmitter localization and communication footprint identification; 3.Target self-localization using beacon nodes. For the first application, a co-phasing based data combining scheme is studied under imperfect channel knowledge. The evolution of network consensus state is modeled as a Markov chain, and the average transition probability matrix is

APA, Harvard, Vancouver, ISO, and other styles

24

Guo, Jing. "Stochastic Geometry for Modeling, Analysis and Design of Future Wireless Networks." Phd thesis, 2016. http://hdl.handle.net/1885/107351.

Full text

Abstract:

This thesis focuses on the modeling, analysis and design of future wireless networks with smart devices, i.e., devices with intelligence and ability to communicate with one another with/without the control of base stations (BSs). Using stochastic geometry, we develop realistic yet tractable frameworks to model and analyze the performance of such networks, while incorporating the intelligence features of smart devices. In the first half of the thesis, we develop stochastic geometry tools to study arbitrarily shaped network regions. Current techniques

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!