Relevant bibliographies by topics / Power radio signal attenuation

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Power radio signal attenuation'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Power radio signal attenuation"

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Kolyadenko, Yu Yu, and N. A. Chursanov. "ANALYSIS OF INDICATORS OF ELECTROMAGNETIC COMPATIBILITY OF COMMUNICATION NETWORKS 5 G." Radio Electronics, Computer Science, Control, no. 3 (October 5, 2021): 7–16. http://dx.doi.org/10.15588/1607-3274-2021-3-1.

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Context. The next generation 5G / IMT-2020 technology, like any new technology, brings its own specific features to all aspects of the practice of its application. One of these particularly important aspects is electromagnetic compatibility. At the stage of preparation for the introduction of 5G radio networks, it is necessary to take early measures to effectively assess the EMC conditions for these networks based on a thorough analysis of the features of 5G technology, and by correctly and accurately assessing these conditions, successfully ensure the electromagnetic compatibility of radio equipment of new networks. Objective. The purpose of this work is to analyze the electromagnetic compatibility of the 5G communication network. Method. An analysis of the main features of the 5G radio interface provides an indication of the expected features of the EMC assessment procedures for these networks. These features mainly relate to taking into account the total interference from the network with its special architecture and dynamics of changes, the choice of new loss models (channel models) for spatially distributed radiation of multidimensional MIMO antennas and a heterogeneous signal propagation medium, as well as taking into account the spectral properties of new signal shapes and character radiation with new non-orthogonal radio access methods.For EMC analysis, a model of signal attenuation in millimeter-wave radio channels was used, taking into account attenuation of radio waves in free space; loss of energy of radio waves when propagating through rains; attenuation of a millimeter wave signal when propagating through the leaves of trees; attenuation of signals when passing through dense obstacles (buildings, structures, etc.). Results. The analysis of attenuation of the millimeter-wave signal in free space from the intensity of precipitation is carried out at various values of optical visibility. The analysis of the attenuation of the millimeter-wave signal from the distance when the signal propagates through obstacles in the form of walls at various values of the wall thickness is carried out. The analysis of the attenuation of the millimeter-wave signal from the depth of the leaf layer is carried out; it covers the signal propagation at different values of the carrier frequency. The analysis of the value of the power of the millimeter-wave signal at the input of the receiver on the intensity of precipitation is carried out at various values of optical visibility. The analysis of the value of the power of the millimeter-wave signal at the input of the receiver versus the distance when the signal propagates through obstacles in the form of walls at various values of the wall thickness is carried out. The analysis of the power value of the millimeter-wave signal at the receiver input from the depth of the leaf layer is carried out, overlaps the signal propagation at various values of the carrier frequency. Conclusions. The conducted studies of EMC indicators allow us to give recommendations on the application of 5G technology in specific practical situations.
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Avva, Jessica, John M. Kovac, Christian Miki, David Saltzberg, and Abigail G. Vieregg. "An in situ measurement of the radio-frequency attenuation in ice at Summit Station, Greenland." Journal of Glaciology 61, no. 229 (2015): 1005–11. http://dx.doi.org/10.3189/2015jog15j057.

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AbstractWe report an in situ measurement of the electric field attenuation length Lα at radio frequencies for the bulk ice at Summit Station, Greenland, made by broadcasting radio-frequency signals vertically through the ice and measuring the relative power in the return ground bounce signal. We find the depth-averaged field attenuation length to be at 75 MHz. While this measurement has clear radioglaciological applications, the radio clarity of the ice also has implications for the detection of ultra-high energy (UHE) astrophysical particles via their radio emission in dielectric media such as ice. Assuming a reliable extrapolation to higher frequencies, the measured attenuation length at Summit Station is comparable to previously measured radio-frequency attenuation lengths at candidate particle detector sites around the world, and strengthens the case for Summit Station as a promising northern site for UHE neutrino detection.
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Koliadenko, Yulia, Mykyta Chursanov, and Oleksii Koliadenko. "Methods of monitoring and control of parameters of signals and elements of the mobile communication network when solving the problem of electromagnetic compatibility." Problemi telekomunìkacìj, no. 2(27) (December 11, 2020): 3–15. http://dx.doi.org/10.30837/pt.2020.2.01.

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To ensure the electromagnetic compatibility of mobile networks, it is necessary to monitor and control: radio frequency resource, frequency and power of signals in the allocated frequency resource, group delay time, resistance parameters to linear attenuation and attenuation associated with multi-beam signal transmission, polarization signal parameters, location (coordinates) of moving sources. The evaluation of parameters based on the results of measurements is currently carried out based on observations, and decision-making is carried out based on sample statistics. The use of methods for measuring the parameters of network elements and communication signals against the background of thermal noise is proposed. The measurement methods are based on the recursive Robbins-Monroe algorithm for estimating such parameters as random variables and the recursive Kalman-Bussey algorithm for estimating random processes. The efficiency analysis of recursive algorithms of optimal estimation of random variables and random processes is carried out. The advantage of recursive estimation methods is that, in practice, they are more effective than statistical processing methods, as they provide real-time estimation and do not require a waste of time for accumulation and processing. In addition to noise, extraneous signals are concentrated in the spectrum with the measured signal in radio communication channels. This fact determines the problem relevance of extracting from the additive mixture of signals and interference of useful signals that come from measurements. Methods for measuring the parameters of network elements and communication signals in the conditions of external signals have been developed. The possibility of using in the meters of parameters of mobile communication networks adaptive noise compensators with adaptive reference reception channel is considered, reducing the power of extraneous signals by 20 … 30 decibels and more.
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Carotenuto, Riccardo, Fortunato Pezzimenti, Francesco G. Della Corte, Demetrio Iero, and Massimo Merenda. "Ranging with Frequency Dependent Ultrasound Air Attenuation." Sensors 21, no. 15 (2021): 4963. http://dx.doi.org/10.3390/s21154963.

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Measuring the distance between two points has multiple uses. Position can be geometrically calculated from multiple measurements of the distance between reference points and moving sensors. Distance measurement can be done by measuring the time of flight of an ultrasonic signal traveling from an emitter to receiving sensors. However, this requires close synchronization between the emitter and the sensors. This synchronization is usually done using a radio or optical channel, which requires additional hardware and power to operate. On the other hand, for many applications of great interest, low-cost, small, and lightweight sensors with very small batteries are required. Here, an innovative technique to measure the distance between emitter and receiver by using ultrasonic signals in air is proposed. In fact, the amount of the signal attenuation in air depends on the frequency content of the signal itself. The attenuation level that the signal undergoes at different frequencies provides information on the distance between emitter and receiver without the need for any synchronization between them. A mathematical relationship here proposed allows for estimating the distance between emitter and receiver starting from the measurement of the frequency dependent attenuation along the traveled path. The level of attenuation in the air is measured online along the operation of the proposed technique. The simulations showed that the range accuracy increases with the decrease of the ultrasonic transducer diameter. In particular, with a diameter of 0.5 mm, an error of less than ± 2.7 cm (average value 1.1 cm) is reached along two plane sections of the typical room of the office considered (4 × 4 × 3 m3).
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Samad, Md Abdus, and Dong-You Choi. "Learning-Assisted Rain Attenuation Prediction Models." Applied Sciences 10, no. 17 (2020): 6017. http://dx.doi.org/10.3390/app10176017.

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Rain attenuation becomes significant to degrade the earth-space or terrestrial radio link’s signal-to-noise ratio (SNR). So, to maintain the desired SNR level, with the help of fade mitigation techniques (FMTs), it needs to control transmitted signals power considering the expected rainfall. However, since the rain event is a random phenomenon, the rain attenuation that may be experienced by a specific link is difficult to estimate. Many empirical, physical, and compound nature-based models exist in the literature to predict the expected rain attenuation. Furthermore, many optimizations and decision-making functions have become simpler since the development of the learning-assisted (LA) technique. In this work, the LA rain attenuation (LARA) model was classified based on input parameters. Besides, for comparative analysis, each of the supported frequency components of LARA models were tabulated, and an accurate contribution of each model was identified. In contrast to all the currently available LARA models, the accuracy and correlation of input-output parameters are presented. Additionally, it summarizes and discusses open research issues and challenges.
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Mendakulov, Zh K., S. Morosi, A. Martinelli, and K. Zh Isabaev. "Investigation of the possibility of reducing errors in determining the coordinates of objects indoors by multi-frequency method." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 1 (2021): 137–44. http://dx.doi.org/10.33271/nvngu/2021-1/137.

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Purpose. To investigate the influence of LOS/NLOS conditions on the radio signal propagation and the possibility of interference mitigation by using multi-frequency method of transmitting and receiving for positioning tasks in enclosed spaces. To check the difference in measurement accuracy when receiving a signal at one frequency from receiving a signal at four frequencies by combining the measurement results of individual frequencies into one reading. To check the influence of various obstacles on the signal passing. Methodology. Design at the laboratory of UHF generator and BLE beacons with the ability to set broadcast frequencies and adjust transmission power. Application of a multi-frequency transmission and reception method. Findings. The possibility of increasing the accuracy of positioning of objects in closed rooms, including mine workings, through the use of multi-frequency radio signals is investigated. It is shown that the influence of re-reflections of radio signals from the walls of structures, from obstacles of various origins, and the associated interference, can be reduced by using averaged values of attenuation at different frequencies. The use of radio emitters with many frequencies as beacons can provide new possibilities in solving the problem of positioning objects in closed rooms. Originality. The work proposes a method for combining measurement results of individual frequencies into one reading, which will reduce interference. Multi-frequency transmission method and multi-frequency reception method are proposed to reduce the influence of interference caused at one frequency on the overall signal level. Practical value. The experimental results obtained can be used at deploying positioning systems in closed rooms, including mine workings.
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Dvornikov, Sergey V., Evgeniy V. Markov, and Adjan A. Manoshi. "NCREASING IMMUNITY OF DECAMETER RADIO CHANNEL TRANSMISSIONS UNDER UNINTENDED INTERFERENCE." T-Comm 15, no. 6 (2021): 4–9. http://dx.doi.org/10.36724/2072-8735-2021-15-6-4-9.

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The transmission of messages is a complex process, which is largely determined by the properties of the radio channel used. Decameter radio channels are the most difficult for organizing communication, since the ionospheric propagation of radio waves is associated with their significant attenuation, due to the significant length of the paths, as well as the presence of Rayleigh fading in the channel. However, the possibility of transmitting information over long distances without serious resource costs stimulates further research to improve the reliability of decameter radio communication. In this paper, we investigate the possibility of increasing the noise immunity of frequency-shift keying transmissions of decameter radio channels in conditions of unintentional interference due to the use of broadband signals. An analytical expression of the dependence of the probability of a bit error on the level of the ratio of the peak signal power to the peak interference power is considered; a graph of this dependence is presented. It is shown that the plot is consistent with the overall noise immunity estimate for Rayleigh fading channels using double FSK signals. The rationality of methods for obtaining the required reception quality in decameter radio channels is analyzed. It is shown that the most rational direction for increasing the noise immunity of FM-2 transmissions in decameter radio channels with Rayleigh fading in conditions of unintended interference is the use of broadband signals. In this case, for expansion, it is advisable to choose a value kf = 7, which makes it possible to increase the noise immunity by 9 dB. The conclusions are illustrated by graphs.
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Marsic, Vlad, Tazdin Amietszajew, Christopher Gardner, Petar Igic, Soroush Faramehr, and Joe Fleming. "Impact of Li-Ion Battery on System’s Overall Impedance and Received Signal Strength for Power Line Communication (PLC)." Sensors 22, no. 7 (2022): 2634. http://dx.doi.org/10.3390/s22072634.

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In anticipation of the hybrid utilisation of the radio frequency (RF) wireless transceiver technology embedded in future smart Li-ion battery cells to deliver hybrid links based on power line communication (PLC) and wireless connections, herein we present an empirical high-frequency investigation of the direct current (DC) bus. The focus is to determine, via statistical tools including correlation coefficient (CC), root mean squared error (RMSE) and feature selective validation (FSV) method, the impedance and signal change impact on a possible communication link when fully charged cells are present or completely missing from the bus. Moreover, to establish if technological differences may be accounted for during the empirical experiments, Li-ion cells from two different manufacturers were selected and connected via three subsequent capacitive couplings of 1 µF, 1 nF and 1 pF. According to a methodical comparison by employing CC, RMSE, and FSV over the measured impedance and signal attenuation, this study has shown that the physical DC network is the dominant impedance at high frequencies and that the signal attenuation on the DC line supports communication in the investigated spectrum. The reported findings are critical for in situ hybrid PLC and wireless communication implementation of BMS for Li-ion systems supported through only one RF transceiver.
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Medina-Acosta, G. A., and José A. Delgado-Penín. "Opportunistic Communication (Cognitive Radio) over Primary Discarded Subchannels by Applying a Double Power Distribution." International Journal of Digital Multimedia Broadcasting 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/823494.

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This paper proposes the establishment of a simultaneous cognitive radio communication based on a subdistribution of power made over unselected subchannels which were discarded by the primary user through an initial optimal power allotment. The aim of this work is to show the possibility of introducing an opportunistic communication into a licensed transmission where the total power constraint is shared. The analysis of the proposed transmission scheme was performed by considering 128 and 2048 independent subchannels affected byRayleighfading, over 10,000 channel realizations, and three different signal-to-noise ratios (8 , 16 , and 24 ). From the system evaluation it was possible to find the optimal power allotment for the primary user, the subdistribution of power for the secondary user, as well as the attenuation and the capacity per subchannel for every channel realization. Moreover, thePDFandCDFof the total obtained capacities, as well as the generation of empirical capacity regions, were estimated as complementary results.
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Rodríguez, José-Víctor, Mats Gustafsson, José-María Molina-García-Pardo, Leandro Juan-Llácer, and Ignacio Rodríguez-Rodríguez. "Frequency-Selective Wallpaper for Indoor Interference Reduction and MIMO Capacity Improvement." Symmetry 12, no. 5 (2020): 695. http://dx.doi.org/10.3390/sym12050695.

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This paper presents the design and features of frequency-selective wallpaper—based on periodic and symmetric metallic hexagons—intended to be attached to standard walls for filtering out 5 GHz signals (e.g., IEEE 802.11a systems) without blocking other selected radio communication services (e.g., cellular mobile communication signals). It analyzes the characteristics of the radio channel—as found within standard indoor environments—with both regular walls and walls with the proposed frequency-selective wallpaper, examined using a ray-launching program for single-input single-output (SISO) and multiple-input multiple-output (MIMO) systems. This allows the harvesting of parameters, including channel capacity, power delay profile, and signal-to-interference ratio, for proper comparison between the two environments under study: with and without the presented wallpaper. The achieved results clearly show that the use of the proposed frequency-selective wallpaper in an indoor scenario reduces interference levels by an additional attenuation of up to 20 dB in comparison to an unpapered wall. Additionally, with MIMO systems, radio channel characteristics, such as capacity, are improved due to the increase in the magnitude of all singular values of the channel transfer matrix compared to the unpapered wall case, thereby leading to the existence of more relevant subchannels.
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Dissertations / Theses on the topic "Power radio signal attenuation"

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Maenou, Takatoshi, and Masaaki Katayama. "Study on Signal Attenuation Characteristics in Power Line Communications." IEEE, 2006. http://hdl.handle.net/2237/7798.

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De, Villiers Wernich. "Prediction and measurement of power line carrier signal attenuation and fluctuation." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52410.

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Thesis (MScEng)--University of Stellenbosch, 2001,<br>ENGLISH ABSTRACT: A frequency domain Power Line Carrier (PLC) simulation program, with the ability to simulate signal attenuation including the coupling equipment, was developed. This simulation program was put to the test against the independent program of Professor L.M. Wedepohl and against practical field measurements. The predictions of the two programs were in precise agreement for a wide range of input parameters. Results from the field tests and predictions also showed close agreement. Further investigations, applying the simulation program, explained how ground conductors and soil resistivity influences PLC signal propagation. An experiment, which was developed to monitor PLC signal attenuation, was installed on the PLC system between Koeberg power station and Acacia substation, both near Cape Town. Data logged continuously over 28 days, indicated measurable and deterministic PLC signal attenuation variations with typical time constants of a few hours. Simulations of the PLC system indicated that the signal amplitude variations were influenced by changes in the height above the ground plane of the phase conductor. This significant finding creates the possibility to obtain real time knowledge of the sag of an Over Head Transmission Line (OHTL) by exploiting an operational PLC system. The knowledge about real time sag can be used in economical dynamic ampacity control systems. The practical and financial benefits to the electricity supply and distribution industry can be significant.<br>AFRIKAANSE OPSOMMING: 'n Frekwensie gebied "Power Line Carrier" (PLC) simulasie program wat die sein verswakking en die koppeling verliese kan naboots, is ontwikkel. Die program is getoets teen die onafhanklike program van Professor L.M. Wedepohl asook praktiese metings in die veld. Die vooruitskatings van beide programme is presies die selfde vir 'n wye reeks van parameters. Metings en nabootsings het ook noue ooreenstemming getoon. Verdere ondersoek, m. b. v. die program, is gedoen ten einde te verduidelik hoe grond-geleiers en grond weerstand die PLC sein se voortplanting beïnvloed. 'n Eksperiment om die PLC sein se verswakking mee te monitor is ontwerp. Die eksperiment was geïnstalleer in die PLC stelsel tussen Koeberg kernkragstasie en Acacia substasie, naby Kaapstad. Die eksperiment was vir 28 dae geaktiveer en die data wat die eksperiment opgelewer het toon meetbare PLC sein verswakking met tyd konstantes van 'n paar uur. Verdere nabootsings het gewys dat die veranderende verswakking in die PLC seinsterkte toegeskryf kan word aan die wisseling in hoogte van die fase geleiers bo die grondvlak. Hierdie bevinding is van besondere belang aangesien dit die moontlikheid oopmaak om die gemiddelde sak van kraglyne in reële tyd en onder bedryfs toestande te kan meet. Die informasie van die reële sak van kraglyne kan gebruik word in effektiewe stroomdrae-vermoë beheer stelsels. Die praktiese en finansiële voordele wat krag voorsieners en verspreiders hieruit kan put kan aansienlik wees.
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Yang, Hong-Kui. "Low-power oversampled signal processing for digital radio receivers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/NQ32351.pdf.

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Apostolou, Nikolaos. "Signal synthesis with dynamically-changed power spectral density in a software defined radio transmitter." Thesis, Monterey, California. Naval Postgraduate School, 2003. http://hdl.handle.net/10945/874.

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Approved for public release; distribution is unlimited<br>The objective of this thesis is to synthesize signals with a dynamically change power spectral density, in a SDR transmitter, utilizing the most appropriate channels, modulation schemes and transmission rates for communication, based on the noise profile (AWGN plus interferences) of the link, in order to achieve performance within some predefined acceptable levels. The objective is obtained by simulation.<br>Major, Hellenic Army
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Hetzel, Simon Andrew. "Power efficient linear transmitters and the LINC technique." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261286.

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Lahdenperä, J. (Juho). "On feasibility of the UE power saving signal for the 5G new radio." Master's thesis, University of Oulu, 2019. http://jultika.oulu.fi/Record/nbnfioulu-201906072487.

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Abstract. The objective of this thesis is to study and evaluate physical layer signals and channels to achieve the user equipment (UE) power saving in the 3rd generation partnership project (3GPP) new radio (NR). The fifth generation (5G) mobile network has strict objectives regarding power consumption and performance. The UE power consumption also has a big impact on the end user’s quality of experience (QoE) and future deployment of NR devices. Therefore, it is very important to study ways to reduce UE power consumption. One feasible power saving technique is the usage of so-called power saving signal or channel, which triggers the UE to transition to the active mode from the power saving mode. The first part of this work provides an overview of general properties of the NR and its physical downlink signals and channels, as well as the UE operation and power consumption in the connected mode. Then, examples of existing power saving techniques are discussed and a new scheme of the wake-up mechanism and the UE power saving signal/wake-up signal (WUS) is described. Lastly, different design options for the power saving signal are described and their detection performance is studied. The power saving signal options of this thesis can be divided into physical downlink control channel (PDCCH) based and sequence-based signals/channels. In the PDCCH based option, the power saving indication is carried as a payload of the PDCCH. Studied sequence-based options are the secondary synchronization signal (SSS), the PDCCH demodulation reference signal (DMRS), the channel state information reference signal (CSI-RS) and a UE-specific sequence that is mapped to all radio resources allocated for the PDCCH. The detection of the latter is done in time domain, and the detection of the other sequences is done in frequency domain. The detection performance of these signals/channels is compared based on link-level simulation results. Simulations were done with a Matlab-based simulator. They show the impact of the frequency- and time-selectivity and implementation impairments. Based on the numerical results, the impact of the UE speed up to 120 km/h and the carrier frequency offset (CFO) up to 400 Hz can be neglected with all the options except CSI-RS. It was shown that the sequence-based WUS options tend to suffer from the frequency-selective radio channel. By making decisions within the channel’s coherence bandwidth and using precoder cycling, the negative impact of the channel can be reduced. With these techniques, PDCCH DMRS outperforms all the other sequence-based options. However, in terms of detection performance, the PDCCH based power saving signal/channel is the most robust option of this set of candidates.Päätelaitteen virransäästösignaalin soveltuvuus 5G:n uuteen radiorajapintaan. Tiivistelmä. Tämän diplomityön tavoitteena on tutkia ja verrata fyysisen kerroksen signaaleja, päätelaitteen (user equipment, UE) virransäästön toteuttamiseksi 3GPP:n uudessa radiorajapinnassa (New Radio, NR). Viidennen sukupolven (5th generation, 5G) mobiiliverkolla on tiukat tavoitteet virransäästön ja suorituskyvyn osalta. Päätelaitteen virrankulutuksella on myös suuri vaikutus loppukäyttäjän kokemukseen ja tulevien NR-laitteiden käyttöönottoon. Siksi onkin erittäin tärkeää tutkia mahdollisia tapoja vähentää päätelaitteen virrankulutusta. Yksi mahdollinen virransäästötekniikka on niin sanottu virransäästösignaali, joka herättää päätelaitteen virransäästötilasta verkkoyhteyteen. Työn ensimmäinen osa käsittelee NR:n yleisiä ominaisuuksia, alalinkin fyysisiä signaaleja ja kanavia, sekä päätelaitteen virrankulutusta verkkoyhteydessä. Seuraavaksi käsitellään olemassa olevia virransäästötekniikoita, sekä käydään läpi uutta herätys-tyyppistä mekanismia ja päätelaitteen virransäästösignaalin/herätyssignaalin (wake-up signal, WUS) toimintaa. Lopuksi kuvataan erilaisia virransäästösignaalivaihtoehtoja ja tutkitaan niiden havaitsemisen suorituskykyä. Työn virransäästösignaalivaihtoehdot voidaan jakaa alalinkin kontrollikanava- (physical downlink control channel, PDCCH) ja sekvenssipohjaisiin signaaleihin/kanaviin. PDCCH-pohjaisessa vaihtoehdossa virransäästösignaali siirretään PDCCH:n hyötykuormana. Tutkitut sekvenssipohjaiset vaihtoehdot ovat toissijainen synkronointisignaali (secondary synchronization signal, SSS), PDCCH-demodulaatio-referenssisignaali (demodulation reference signal, DMRS), kanavan tilatieto-referenssisignaali (channel-state information reference signal, CSI-RS), sekä UE-spesifinen sekvenssi, joka asetetaan PDCCH:n jokaiseen alikantoaaltoon. Jälkimmäisen havaitseminen tehdään aikatasossa ja muiden sekvenssien havaitseminen tehdään taajuustasossa. Näiden signaalien/kanavien havaitsemisen suorituskykyä vertaillaan linkkitason simulointitulosten perusteella. Simulaatiot tehtiin Matlab-pohjaisella simulaattorilla. Ne esittävät aika- ja taajuusselektiivisyyden, sekä toteutuksen epäideaalisuuksien vaikutusta. Numeeristen tulosten perusteella, UE:n nopeus arvoon 120 km/h ja kantoaaltotaajuussiirto (carrier frequency offset, CFO) 400 Hz:iin asti voidaan jättää huomioimatta, kaikkien muiden paitsi CSI-RS:n tapauksessa. Työssä osoitettiin, että sekvenssipohjaiset WUS-vaihtoehdot kärsivät taajuusselektiivisestä radiokanavasta. Kanavan negatiivista vaikutusta voidaan pienentää tekemällä päätöksiä kanavan koherenssikaistanleveyttä pienemmissä osissa, sekä käyttämällä syklistä esikooderia. Näillä tekniikoilla PDCCH DMRS suoriutuu kaikkia muita sekvenssipohjaisia vaihtoehtoja paremmin. Kuitenkin, havaitsemisen suorituskyvyn perusteella PDCCH-pohjainen virransäästösignaali/kanava on vahvin ehdokas näistä vaihtoehdoista.
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Chan, kwong Fu. "Large-signal characterization/modeling and linearization techniques for RF power amplifiers /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202004%20CHANK.

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Одарченко, Роман Сергійович, Roman Odarchenko та Одарченко Роман Сергеевич. "Методологія підвищення ефективності функціонування стільникових мереж зв'язку". Thesis, Національний авіаційний університет, 2019. http://er.nau.edu.ua/handle/NAU/38385.

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В роботі було розроблено методологію підвищення ефективності стільникових мереж зв’язку, яка полягає у використанні удосконалено методу планування мережі стільникового зв’язку для розгортання стільникових мереж нового покоління, методу оцінки ключових показників функціонування мережі стільникового оператора з метою безперервної оптимізації мережі оператора шляхом використання методу оптимізації підсистеми базових станцій розгорнутої мережі стільникового оператора, удосконаленого методу розвантаження радіо інтерфейсу мережі стільникового оператора із використанням підмережі Wi-Fi (Wireless Fidelity), методу оптимізації багаторівневого транспортного сегменту стільникової мереж, удосконаленого методу маршрутизації із резервуванням ресурсів та балансуванням навантаження транспортної мережі стільникового оператора, методу оцінки ефективності програмно-конфігурованої мережі та методу мережецентричного моніторингу та реагування на кіберінциденти в мережі оператора стільникового зв’язку. За допомогою розробленої методології операторам стільникового зв’язку вдається підвищити ефективність функціонування своїх мереж за рахунок збільшення радіусу зон обслуговування абонентів стільникових мереж, мінімізації необхідної кількості базових станцій для побудови мережі, збільшення вдвічі кількості активних абонентів, які обслуговуються в стільнику та забезпечення балансування навантаження в радіопідмережі, підвищення економічної ефективності транспортної мережі, підвищення рівня надійності мережі, оптимізації утилізації транспортних каналів, проведення більш гнучкого та оперативного розширення мережі, запровадження нових сервісів, підвищення оперативності доставки даних для ієрархічної структури рівня управління. Отримані наукові результати доцільно використовувати під час планування безпроводових мереж стандарту LTE та 5G, розробки обладнання та програмного забезпечення для систем передачі даних, а також в навчальному процесі.<br>Диссертация посвящена вопросам разработки методологии повышения эфективности сотовых сетей связи. В работе был проведен анализ качества обслуживания абонентов сотовых сетей в Украине с целью определения их эффективности. Было установлено, что заявленные требования к сетям четвертого поколения не достигаются ни в одной из реализованных сетей, а фактическое качество обслуживания абонентов находится на достаточно низком уровне, что свидетельствует о низкой эффективности существующих методов планирования радиосетей, транспортных подсистем и методов управления. В работе были предложены альтернативные стратегии развития операторов сотовой связи в Украине. В работе впервые разработана методология повышения эффективности сотовых сетей связи, заключающаяся в использовании усовершенствованного метода планирования сети LTE для развертывания сотовых сетей нового поколения, метода оценки ключевых показателей функционирования сети сотового оператора с целью непрерывного оп-тимизации сети оператора путем использования метода оптимизации подсистемы базо вых станций развернутой сети сотового оператора, усовершенствованного метода рас-погрузки радио интерфейса сети сотового оператора с использованием подмел-режиме Wi-Fi, метода оптимизации многоуровневого транспортного сегмента сотовой сетей, метода резервирования ресурсов и балансировки нагрузки транспортной ме-режи сотового оператора и метода оценки эффективности программно-конфигурируемых сети. С помощью разработанной методологии операторам сотовой связи удается повысить эффективность своих сетей за счет увеличения радиус зон обслуживания абонентов сотовых сетей, минимизации необходимого количества базовых станций для построения сети, увеличение вдвое количества активных абонентов, обслугвуються в базовой и обеспечения балансировки нагрузки в радиопидмережи, повышение економинои эффективности транспортной сети, повышение уровня надежности сети, оптимизацией утилизации транспортных каналов, проведение более гибкого и оперативного расширения сети, внедрение новых сервисов, повышения оперативности доставки данных для иерархической структуры уровня управления.<br>The amount of traffic carried over wireless networks is growing rapidly and is being driven by many factors. Chief among them is the tremendous growth in multimedia applications on mobile devices – streaming music and video, two-way video conferencing and social networking to name a few. The telecoms industry is undergoing a major transformation towards 5G networks in order to fulfil the needs of existing and emerging use cases. The 5G architecture should seamlessly support both fixed and mobile access technologies under a fully converged end-to-end system in order to deliver future service requirements for some of the deployment scenarios that could be supported. This technologies in nearest future have come to Ukraine too. That’s why in this dissertation an analysis of the quality of service of subscribers of cellular networks in Ukraine was conducted in order to determine the efficiency of their operation and security. An analysis of the quality of customer service in the implemented projects of LTE networks in the world and 4G networks in Ukraine has established that the claimed requirements for fourth generation networks are not achieved in any of the implemented networks, and the actual quality of customer service (target efficiency) is at a rather low level which indicates the low efficiency of existing radio network planning methods, transport subsystems, control and cybersecurity management methods. This made it possible to determine the directions by which it is necessary to increase the efficiency of the operation of cellular networks. In this dissertation were developed several methods to improve network efficiency. The method of planning of the network of the cellular operator enables cellular operators to more accurately assess the coverage of radio coverage areas, choose key indicators of service quality, more efficient frequency planning and capital cost calculation, which in turn allows us to assess the feasibility of constructing a cellular network option. On the basis of this advanced method, a training software (web-application) was developed to evaluate radio coverage zones of LTE network base stations. The method for evaluating key indicators of service quality, the level of information security and the efficiency of cellular networks makes it possible to assess the most important indicators of the quality of functioning and security of the cellular network network in order to continuously monitor and optimize them when introducing new services during customer service. The method for optimizing the subsystem of base stations allows to increase the radius of subscriber service areas of cellular networks, which allows minimizing the number of base stations for network construction, and therefore reduce the cost of the cellular operator to build the subsystem of the base stations, that is, increase the economic efficiency of the network. Improved method of the radio interface off-loading using a non-3GPP standard subnet allow to reduce the load on the radio interface of the network of the cellular network to an acceptable level, double the number of active subscribers, which are served in the cell, and provide load balancing and increase the efficiency of the radio subnetwork. The method of optimization of a multi-level transport segment of a cellular network has been developed, which allows to improve the structure of the transport network during the transition to new generations networks, providing the necessary capacity and increasing and improving the efficiency of the transport network. The method of routing with resource reservation and balancing of the traffic of a cellular operator with the consideration of information security requirements allows to increase the efficiency of the transport channels usage. The method for evaluating the effectiveness of a software-configured network allows for a more flexible and operational expansion of the network, the introduction of new services, increasing the efficiency of data delivery for the hierarchical structure. The method of network-centric monitoring and response to cyber incidents in the network of the cellular network allows real-time monitoring of the state of cyber security, its level and, consequently, the efficiency of the cellular network. On the base of these methods in this dissertation was developed cellular networks efficiency improving methodology, which is using the improved method of LTE network planning, the key method for assessing performance of the cellular operator for the purpose of continuous operator network optimizing using the method of base station subsystem optimization, improved method of radio interface of the cellular operator offloading using Wi-Fi, the method of optimization of multi-vehicle segment of the cellular network, the method of roating with resource reservation and load balancing of mobile operator and method of SDN network effectiveness evaluation. Using the developed methodology mobile operators can improve the efficiency of their networks by increasing the radius of the service areas, minimizing the required number of base stations for the construction of the network, doubling the number of active subscribers in the cell and provide load balancing in transport and radio network, increase transport network efficiency, enhance network reliability, optimize utilization of transport channels for a more flexible and rapid network expansion, introduction of new services and improved data delivery in the hierarchical structure of SDN. It is advisable to use the obtained scientific results when planning LTE and 5G wireless networks, developing equipment and software for data transmission systems, as well as in the learning process.
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Fioravanti, Paolo. "Large signal design of silicon field effect transistors for linear radio frequency power amplifiers." Thesis, De Montfort University, 2006. http://hdl.handle.net/2086/13294.

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Hussain, Sajjad. "PEAK TO AVERAGE POWER RATIO ANALYSIS AND REDUCTION OF COGNITIVE RADIO SIGNALS." Phd thesis, Université Rennes 1, 2009. http://tel.archives-ouvertes.fr/tel-00426930.

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* La multiplication des standards de télécommunications fait apparaître la nécessité de disposer de terminaux multistandard et reconfigurables. Ces nouvelles fonctionnalités trouvent leurs réponses dans le domaine de la radio logicielle. De tels terminaux ne sont pas encore réalisables pour des raisons technologiques liées à la complexité nécessaire à leur réalisation (convertisseurs ultra rapides, processeurs reconfigurables, antennes et amplificateurs très large bande, ....). En se basant alors sur une véritable technologie radio logicielle, la radio intelligente va encore plus loin dans la prospective en dotant le terminal de capteurs qui lui permettront de s'adapter et de réagir vis à vis de son environnement. La radio devient alors décentralisée et flexible se détachant de la notion de standards et transmettant de façon opportuniste une communication dans une bande qui aura été détectée comme libre. Cette présentation s'inscrit dans le contexte présenté ci-dessus en se focalisant sur les conséquences de l'amplification de puissance d'un signal multistandard. En effet, l'amplication de puissance est un étage fondamental de tout système radio et certaines précautions doivent être prises avant d'amplifier un signal. En effet, les amplificateurs ont des caractéristiques non linéaires et de faibles rendements nécessitant un traitement du signal à amplifier afin de limiter d'une part les distorsions non linéaires et d'autre part la consommation des terminaux. Les signaux caractérisant les systèmes multistandard ayant des caractéristiques proches de celle d'un signal OFDM (connu pour les problèmes liés à l'amplification de puissance), ce travail apporte des réponses sur : * les niveaux de puissance d'un signal multistandard * les méthodes à développer pour en minimiser les fluctuations de puissance * les conséquences de l'accès opportuniste au spectre sur les fluctuations de puissance dans un contexte de radio intelligente
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Books on the topic "Power radio signal attenuation"

1

Rudiakova, Anna, and Vladimir Krizhanovski. Advanced Design Techniques for RF Power Amplifiers (Analog Circuits and Signal Processing). Springer, 2006.

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RF Power Amplifiers for Mobile Communications (Analog Circuits and Signal Processing). Springer, 2006.

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Adaptive Low-Power Circuits for Wireless Communications (Analog Circuits and Signal Processing). Springer, 2006.

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Signal Synthesis With Dynamically-Changed Power Spectral Density in a Software Defined Radio Transmitter. Storming Media, 2003.

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The Role of Adaptive Photorefractive Power Limiting on Acousto-Optic Radio Frequency (RF) Signal Excision. Storming Media, 2001.

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Ultra Low Power Transceiver for Wireless Body Area Networks Analog Circuits and Signal Processing. Springer International Publishing AG, 2013.

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Faramaz, Davarian, Jet Propulsion Laboratory (U.S.), and Advanced Communications Technology Satellite (ACTS) Propagation Studies Workshop (7th : 1995 : Fort Collins, Colo.), eds. Proceedings of the nineteenth NASA Propagation Experimenters Meeting (NAPEX XIX) and the Advanced Communications Technology Satellite (ACTS) Propagation Studies Workshop (APSW VII) held in Fort Collins, Colorado, June 14-16, 1995. National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology, 1995.

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1938-, Huijsing Johan H., Plassche Rudy van de, Sansen Willy M. C, and Workshop of Advances in Analogue Circuit Design (7th : 1998 Copenhagen, Denmark), eds. Analog circuit design: Volt electronics, mixed-mode systems, low-noise and RF power amplifiers for telecommunication. Kluwer Academic Publishers, 1999.

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(Editor), Johan H. Huijsing, Rudy J. van de Plassche (Editor), and Willy M.C. Sansen (Editor), eds. Analog Circuit Design: Volt Electronics; Mixed-Mode Systems; Low-Noise and RF Power Amplifiers for Telecommunication. Springer, 1998.

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Book chapters on the topic "Power radio signal attenuation"

1

Apsel, Alyssa, Xiao Wang, and Rajeev Dokania. "Low Power Impulse Radio Transceivers." In Analog Circuits and Signal Processing. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-1845-0_3.

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Apsel, Alyssa, Xiao Wang, and Rajeev Dokania. "Approaches to Low Power Radio Design." In Analog Circuits and Signal Processing. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-1845-0_2.

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Korchagin, Yury, Oleg Chernoyarov, Mikhail Trifonov, and Alexander Makarov. "Localization of the Radio Signal with the Unknown Non-power Parameter." In Software Engineering Application in Informatics. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-90318-3_45.

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Höflinger, Fabian, Joan Bordoy, Rui Zhang, et al. "Indoor Localization System Using Ultra Low-Power Radio Landmarks Based on Radio Signal Strength and Travel Time." In Communications in Computer and Information Science. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30110-1_6.

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Munoz Torrico, Max, Robert Foster, and Yang Hao. "Identifying Physiological Features from the Radio Propagation Signal of Low-Power Wireless Sensors." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37893-5_38.

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Guilherme, David, Jorge Guilherme, and Nuno Horta. "Automatic Layout Optimizations for Integrated MOSFET Power Stages." In Computational Intelligence in Analog and Mixed-Signal (AMS) and Radio-Frequency (RF) Circuit Design. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19872-9_6.

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Chen, Xiaofei, Xue Wang, Xiaochun Lu, Jing Ke, and Xia Guo. "Navigation Signal Design and Ranging Performance Evaluation of Cn Band Based on Satellite-to-Ground Link." In Machine Learning and Artificial Intelligence. IOS Press, 2020. http://dx.doi.org/10.3233/faia200809.

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As the only priority frequency band for navigation services except L protected by ITU, the Cn band could provide navigation services to solve problems of spectrum congestion and vulnerability to interference faced in L using global navigation satellite systems. However, Cn band navigation still faces some problems such as limited-bandwidth and link uncertainty. To solve these problems, an orthogonal MSK signal is designed in this paper under Cn limited bandwidth constraint. The analysis results show that although it’s ranging performance of narrow correlation spacing has been deteriorated, the performance of wide correlation spacing has been improved, and it can reduce 98.7% power interference to adjacent radio astronomy band. On the other hand, the Cn band navigation signal test based on the satellite-to-ground link is carried out in this paper. The test results show that the trend of designed signals’ ranging performance is consistent with the simulation results and its rain attenuation is 0.5–1dB.
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"Low Voltage Low Power Analog Circuit Design OTA Using Signal Attenuation Technique and Applications." In Sensors, Circuits and Instrumentation Systems. De Gruyter, 2019. http://dx.doi.org/10.1515/9783110592566-001.

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Kaman, Mathan, Radhakrishnan P., and Sekar K. "IoT-Based Wireless Microwave Power Transmission Using Rectenna." In Antenna Design for Narrowband IoT. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9315-8.ch008.

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Wireless microwave power transfer (WMPT) knowledge is measured as one of efficient energy shifting technologies. Power transmission by radio waves dates back to the early 1890s. WMPT had a long history before the recent movement towards it. This chapter proposed that the WMPT can be applied to beam-type point-point technique as well as an energy collecting system fed by broadcasting radio waves and solar powered satellites to power IoT devices. WMPT is an important technology in the practice of rectenna (rectifying antenna) to convert microwave signal to a direct current (DC) signal with good efficiency. This method of transferring the power through wireless medium will minimize the wastage of power.
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Yeap, Kim Ho, Wei Gie Lim, Tee Tang, and Veerendra Dakulagi. "Development of a Simple Home-Brew Radio Telescope." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2381-0.ch003.

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In this chapter, the design and construction of a simple home-brew radio telescope are illustrated. The radio telescope is built essentially from commercial off-the-shelf components. The main components include an offset prime-focus Ku-band reflector antenna, RF detector circuit, Arduino microcontroller, and a computer. To demonstrate the viability of the telescope, a drift-scan of the sun was performed. From the measurement, it is observed that the radiation signal from the sun has a peak power of –34.3 dBm, half power of –35.4 dBm, and a beamwidth of 3.13o. The impact of rain on the signal from the sky was also investigated. The result shows that there was a noticeable degradation of the power received. A significant amount of energy is absorbed by the dense water vapour in the atmosphere.
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Conference papers on the topic "Power radio signal attenuation"

1

Demetri, Silvia, Gian Pietro Picco, and Lorenzo Bruzzone. "Estimating Low-Power Radio Signal Attenuation in Forests: A LiDAR-Based Approach." In 2015 International Conference on Distributed Computing in Sensor Systems (DCOSS). IEEE, 2015. http://dx.doi.org/10.1109/dcoss.2015.17.

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Mathew, Jimson, R. Mahesh, A. P. Vinod, and Edmund M.-K. Lai. "Realization of low power high-speed channel filters with stringent adjacent channel attenuation specifications for software radio receivers." In 2007 6th International Conference on Information, Communications & Signal Processing. IEEE, 2007. http://dx.doi.org/10.1109/icics.2007.4449884.

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Yi, Tongxun, Ephraim J. Gutmark, and Michael Cornwell. "Characteristics and Control of an Unstable Liquid-Fueled Multi-Swirling Combustor." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-69020.

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This paper reports our initial results on active control of combustion instability in a lean direct fuel injection combustor featured with multiple air swirls and distributed fuel injection. Fuel modulation is achieved by “pushing” fuel out of the valve cavity using a magnetostrictive rod that extends or contracts with unsteady currents going through its surrounding coil. To follow the flow commands and quickly reject exogenous disturbances on mean fuel flow rate, an LQG pulse-width modulation controller based on system identification models is developed. As a starting point, we tried a phase shift controller whose optimal control phase is directly obtained from system identification models. Pressure attenuation up to 20 dB is achieved within 150 ms using pressure feedback that achieves more pressure attenuation than optical fiber feedback. It is found that, during unstable combustions, pressure has a higher signal noise ratio than the optical fiber output mainly because the thermoacoustic system has a high gain around its resonant frequencies. Time-varying phase relationship exists between heat release and pressure. Partial blockage of the combustor exit considerably reduces combustion oscillation intensity and postpones the occurrence of unstable combustion to a higher equivalence ratio. This may be because the exit blockage increases the acoustic impedance at the combustor exit and modifies the reacting flow field. With higher preheat temperature, strong combustion oscillations may occur at a lower equivalence ratio. Pressure pulsations may exhibit hysterisis with equivalence ratio, especially at lower preheat temperature.
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An, Liansuo, Peng Wang, Guoqing Shen, and Jie Shi. "Time Delay Estimator for Boiler Tube Leakage Localization." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55442.

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The inference of strong background noise and reflected by the wall and tube rows surface makes it impossible that justify accurately leakage position employing the characteristic received by multi-channel sensors. It is the ‘bottleneck’ for promoting the accuracy of boiler tube leakage location. The 600MW supercritical boiler model was established, the leakage source propagation process of reflection and attenuation in boiler furnace was simulated by EASE. The approximate signal to noise ratio (SNR) was obtained and the reverberation time was calculated with the squared impulse response integration method on the foundation of simulation. The time delay estimation algorithm PTN, SWITCH derived from PHAT and ML, respectively, are proposed and experiments results revealed the superiority over the classical generalized cross correlation (GCC) method in reverberant and noisy boiler background. Although SWITCH is outperformed by PTN slightly, but the prior knowledge of reverberant energy to direct energy ratio may be hard to obtain in practice and frequencies onset detection is required in PTN method, so the implementation of SWITCH is much easier.
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Zhu, Jiabin, Hua Zhou, and Huayong Yang. "Investigations on Pulsation-Reduction Characteristics of Hydraulic Attenuator Based on Experimental Method." In ASME/BATH 2014 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fpmc2014-7835.

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Three types of hydraulic attenuators are designed and investigated to study the pulsation-reduction characteristics in hydraulic system. Attenuator test rig is established to obtain pressure signals in time domain and frequency domain (5 Hz to 1200 Hz), respectively. Influences of changing source impedance and loading impedance to the attenuation rate (Ka) and pressure ratio of inlet and outlet (Pio) are discussed. Experiment results show that expansion chamber attenuator (ECA) is a better choice for a wide frequency range of pulsation reduction. Two types of perforated tube attenuators (PTA) have better performances in some certain frequency range. The performance of PTA can have further improvements by designing the damping holes diameters. The performance of the attenuator is mainly influenced by pump character and rotating speed. The system loading has limited influence on the performance comparing to source impedance.
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Suherman, Ali Hanafiah, Naemah Mubarakah, and Agustiar Widodo. "Underground Radio Signal Attenuation at 109.8 MHz." In International Conference of Science, Technology, Engineering, Environmental and Ramification Researches. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0010074601880191.

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Adagunodo, T. A., S. A. Akinwumi, T. V. Omotosho, and M. L. Akinyemi. "Estimation of specific attenuation of radio signal in Southwest Nigeria." In 2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO). IEEE, 2017. http://dx.doi.org/10.23919/radio.2017.8242225.

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Kikkert, Cornelis Jan, and Geoffrey Reid. "Radiation and attenuation of communication signals on power lines." In Signal Processing (ICICS). IEEE, 2009. http://dx.doi.org/10.1109/icics.2009.5397568.

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Asp, Ari, Yaroslav Sydorov, Mikko Valkama, and Jarno Niemela. "Radio signal propagation and attenuation measurements for modern residential buildings." In 2012 IEEE Globecom Workshops (GC Wkshps). IEEE, 2012. http://dx.doi.org/10.1109/glocomw.2012.6477638.

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Zhou, Sai-Qiong, Kun Liao, Jiao He, and Er-Ping Li. "Investigation of the attenuation characteristics of radio signal in ruins." In 2015 IEEE International Wireless Symposium (IWS). IEEE, 2015. http://dx.doi.org/10.1109/ieee-iws.2015.7164543.

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Reports on the topic "Power radio signal attenuation"

1

Stevens, Dale M. The Role of Adaptive Photorefractive Power Limiting on Acousto-Optic Radio Frequency (RF) Signal Excision. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada406769.

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