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Dissertations / Theses on the topic 'Frequency Selective Broadband Channels'

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Published: 25 May 2024
Last updated: 31 July 2025

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1

Kosa, Irfan. "Performance of IEEE 802.11a wireless LAN standard over frequency-selective, slowly fading Nakagami channels in a pulsed jamming environment." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FKosa.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2002.<br>Thesis advisor(s): R. Clark Robertson, Tri Ha. Includes bibliographical references (p. 107-108). Also available online.
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2

Bemani, Ali. "Affine Frequency Division Multiplexing (AFDM) for Wireless Communications." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS610.pdf.

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La recherche de nouvelles formes d'onde robustes, lorsque utilisées sur des canaux doublement sélectifs, est primordiale. De telles formes d'onde permettraient donc d'assurer des communications fiables pour les réseaux sans fil de nouvelle génération dans les scénarios de haute mobilité. Dans cette thèse, une nouvelle solution, le affine frequency division multiplexing (AFDM), est proposée. Cette nouvelle forme d'onde de type multichirps est basée sur la transformée de Fourier affine discrète (DAFT), une variante de la transformée de Fourier discrète caractérisée par deux paramètres pouvant êt
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3

Qin, Tianrui. "Over-the-air computation via broadband channels." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/26460.

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As the scale of the current network keeps increasing at a dramatic rate, the future Internet-of-Things applications will need to connect billions of sensor nodes. This brings great challenges to the traditional "transmit then compute" mode, as communication latency will be excessive for a large-scale communication network. The massive access points will also exhaust bandwidth resources in a conventional multiple-access scheme. By exploiting the superposition property of a multi-access channel, Over-the-Air Computation (AirComp) has been recognized as a low-latency solution for wireless senso
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4

Ekinci, Umut Utku. "Code Aided Frame Synchronization For Frequency Selective Channels." Thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/2/12611951/index.pdf.

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Frame synchronization is an important problem in digital communication systems. In frame synchronization, the main task is to find the frame start given the flow of the communication symbols. In this thesis, frame synchronization problem is investigated for both additive white Gaussian noise (AWGN) channels and frequency selective channels. Most of the previous works on frame synchronization consider the simple case of AWGN channels. The algorithms developed for this purpose fail in frequency selective channels. There is limited number of algorithms proposed for the frequency selective channel
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5

Chen, Xuan. "Adaptive equalization of frequency selective indoor wireless channels." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10132.

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In this thesis, we examine the performance of adaptive linear, T/2 fractionally spaced, and decision feedback equalizers (LE, FSE and DFE) for digital communication systems over indoor wireless channels affected by frequency selective fading. The channel is modeled as both fixed and time varying channels, and the data transmission rate is 10 M bits/s. The simulation results show that, with differential encoding, the quadrature phase shift keying (DQPSK) modulation scheme outperforms 4-state and 8-state 8PSK-based trellis coded modulations (D8PTCM4 and D8PTCM8), when the DFE with the least-mean
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6

So, Daniel Ka Chun. "MIMO wireless communications in frequency selective fading channels /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202003%20SO.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.<br>Includes bibliographical references (leaves 136-144). Also available in electronic version. Access restricted to campus users.
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7

Liu, Shoumin. "Soft-decision equalization techniques for frequency selective MIMO channels /." Available online. Click here, 2005. http://sunshine.lib.mtu.edu/ETD/DISS/lius/Dissertation.pdf.

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8

Xu, Ying Lin 1975. "OFDMA schemes with diversity in frequency-selective fading channels." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81577.

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By using sufficiently long prefix and orthogonal narrow-band sub-carriers with adaptive bit loading, orthogonal frequency-division multiple-access (OFDMA) can offer high bandwidth efficiency required for broadband wireless access communications in frequency-selective fading channels. However, when deep fading occurs in a frequency slot, it can create data loss in one or more sub-carriers. Diversity techniques could be used to enhance the performance of OFDMA in the presence of deep fades.<br>The research presented in this thesis aims to provide diversity in OFDMA for broadband wireless
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9

Davies, Martin. "Polynomial matrix decomposition techniques for frequency selective MIMO channels." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6047.

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For a narrowband, instantaneous mixing multi-input, multi-output (MIMO) communications system, the channel is represented as a scalar matrix. In this scenario, singular value decomposition (SVD) provides a number of independent spatial subchannels which can be used to enhance data rates or to increase diversity. Alternatively, a QR decomposition can be used to reduce the MIMO channel equalization problem to a set of single channel equalization problems. In the case of a frequency selective MIMO system, the multipath channel is represented as a polynomial matrix. Thus conventional matrix decomp
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10

Litchfield, Charan. "Single user diversity receivers for frequency selective WCDMA channels." Thesis, University of Kent, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443772.

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11

Assimi, Abdel Nasser. "Diversity techniques for HARQ transmissions over frequency-selective channels." Cergy-Pontoise, 2009. http://biblioweb.u-cergy.fr/theses/09CERG0428.pdf.

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Nous considérons dans cette thèse le problème de la transmission fiable de données par paquets en utilisant une transmission mono-porteuse sur des canaux sélectifs en fréquence à évanouissements. Notre objectif est de concevoir des couples émetteurs-récepteurs permettant d'améliorer les performances de la détection en l'absence d'information sur le canal à la transmission et ceci en exploitant la diversité temporelle disponible dans le cadre des protocoles de retransmission hybrides (HARQ). En analysant les performances du système de transmission avec un récepteur à maximum de vraisemblance, n
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12

Zhu, Xu. "Wireless MIMO antenna systems for frequency selective fading channels /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202003%20ZHU.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.<br>Includes bibliographical references (leaves 116-118). Also available in electronic version. Access restricted to campus users.
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13

Liu, Yuan. "FREQUENCY DOMAIN INDEPENDENT COMPONENT ANALYSIS APPLIED TO WIRELESS COMMUNICATIONS OVER FREQUENCY-SELECTIVE CHANNELS." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3150.

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In wireless communications, frequency-selective fading is a major source of impairment for wireless communications. In this research, a novel Frequency-Domain Independent Component Analysis (ICA-F) approach is proposed to blindly separate and deconvolve signals traveling through frequency-selective, slow fading channels. Compared with existing time-domain approaches, the ICA-F is computationally efficient and possesses fast convergence properties. Simulation results confirm the effectiveness of the proposed ICA-F. Orthogonal Frequency Division Multiplexing (OFDM) systems are widely used in wir
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14

Zheng, Jun. "Analysis of coded OFDM system over frequency-selective fading channels." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1137.

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This thesis considers the analysis of system performance and resource allocation for a coded OFDM system over frequency selective fading channels. Due to the inseparable role taken by channel coding in a coded OFDM system, an information theoretical analysis is carried out and taken as the basis for the system performance and throughput. Based on the results of the information theoretical analysis, the optimal system BER performance of a coded OFDM system is first shown to converge to the outage probability for large OFDM block lengths. Instead of evaluating the outage probability numerica
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15

Szubbocsev, Zoltan. "The EM algorithm for frequency selective, quasi-static fading channels /." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111503.

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A fractional iterative channel estimation and data detection algorithm is proposed for frequency selective, quasi-static MIMO channels. It is shown that due to the correlation of the noise samples after pulse matched filtering and sampling, the complexity of the derived receiver, based on the Expectation-Maximization (EM) algorithm with fractional sampling, is the same as that of the ML receiver, which requires an exhaustive search. It is shown that by using a noise whitening filter to whiten the noise samples, the algorithm can be efficiently implemented using the Viterbi algorithm instead of
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16

Count, Patrick A. "Performance analysis of OFDM in frequency selective, slowly fading Nakagami Channels." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA401365.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, December 2001.<br>Thesis Advisor(s): Ha, Tri T. ; Robertson, R. Clark. "December 2001." Includes bibliographical references (p. 109-110). Also available in print.
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17

Liu, Hong. "Frequency-domain equalization of single carrier transmissions over doubly selective channels." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1187064126.

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18

Chu, Alice Pin-Chen. "High-Rate Space-Time Block Codes in Frequency-Selective Fading Channels." Thesis, University of Canterbury. Electrical and Computer Engineering, 2012. http://hdl.handle.net/10092/10360.

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The growing popularity of wireless communications networks has resulted in greater bandwidth contention and therefore spectrally efficient transmission schemes are highly sought after by designers. Space-time block codes (STBCs) in multiple-input, multiple-output (MIMO) systems are able to increase channel capacity as well as reduce error rate. A general linear space-time structure known as linear dispersion codes (LDCs) can be designed to achieve high-data rates and has been researched extensively for flat fading channels. However, very little research has been done on frequency-selective f
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19

Song, Hui. "On statistical characterization of EESM effective SNR over frequency selective channels." Thesis, University of Bedfordshire, 2010. http://hdl.handle.net/10547/135260.

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With frequency selective fading, the SNRs of each sub-carrier would vary over the time and frequency. It would then cause fluctuations of the effective SNR. As the decision of MeS in LA is based on the effective SNR, the study of the statistical characterization of effective SNR over frequency selective fading channels would be very important, This problem forms the basis of investigation in this thesis. The methodology used in this thesis is generally divided into two parts. The first part is to investigate the method in obtaining the distribution of EESM over frequency selective fading chann
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20

Ahmed, Alaa Hussain. "Physical layer network coding based communication systems in frequency selective channels." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3871.

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The demand for wireless communications is growing every day which requiresmore speed and bandwidth. In two way relay networks (TWRN), physical layer network coding (PLNC) was proposed to double the bandwidth. A TWRN is a system where two end users exchange data through a middle node called the relay. The two signals are allowed to be physically added before being broadcasted back to the end users. This system can work smoothly in flat fading channels, but can not be applied straightforward in frequency selective channels. In a multipath multi-tap FIR channel, the inter-symbol interference (ISI
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21

Viteri, Mera Carlos Andres. "Beamforming Techniques for Frequency-Selective and Millimeter-Wave Indoor Broadcast Channels." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152344603415358.

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22

Le, Bidan Raphaël. "Turbo-equalization for bandwidth-efficient digital communications over frequency-selective channels." Rennes, INSA, 2003. http://www.theses.fr/2003ISAR0012.

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Cette thèse traite de la combinaison des fonctions d'égalisation et décodage pour les transmissions haut-débits avec modulations codées sur canaux sélectifs en fréquence. Nous considérons la Turbo-Egalisation, qui instaure un échange itératif d'information entre l'égaliseur et le décodeur. Nous étudions dans un premier temps le turbo-égaliseur reposant sur le critère maximum-a-posteriori, et montrons que ce récepteur offre des gains de performances importants en comparaison avec les récepteurs traditionnels. Nous considérons ensuite une seconde classe de turbo-égaliseurs de moindre complexité
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23

Rattray, George G. K. "Joint diversity trellis-coded modulation for frequency selective environments." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366060.

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24

Katayama, Masaaki. "Keynote: “Power line channels: frequency and time selective” Part 2.-Noise statistics of indoor PLC channels." IEEE, 2007. http://hdl.handle.net/2237/9424.

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25

SUGAHARA, TOMIE. "DETECTION OF TRELLIS-COBE MODULATED SIGNAL IN FREQUENCY NON-SELECTIVE FADING CHANNELS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1997. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8513@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Este trabalho examina uma nova estratégia para detenção de Sinais TCM em presença de desvanecimento não-seletivo em freqüência. Esta estratégia faz uso de um conjunto de estimativas da distorção do canal, cada uma associada a um estado da treliça de decodificação, que são utilizadas simultaneamente no processo de decodificação. No método proposto, a cada intervalo de símbolo calcula-se uma estimativa de canal para cada percurso sobrevivente, usando os sinais associados a este percurso como decisões dos sinais transmiti
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26

Aktas, Emre. "Channel estimation and equalization for wireless communication systems in frequency selective channels /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486546889382902.

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27

Iyer, Karthik S. "Iterative equalization and decoding for modified D-BLAST in frequency selective MIMO channels." Ann Arbor, Mich. : ProQuest, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1432940.

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Thesis (M.S. in Electrical Engineering)--S.M.U.<br>Title from PDF title page (viewed July 9, 2007). Source: Masters Abstracts International, Volume: 44-04, page: 1928. Adviser: Dinesh Rajan. Includes bibliographical references.
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28

Tung, Tai-Lai, Kung Yao, and Don Whiteman. "MULTIPLE-ANTENNA SPATIO-TEMPORAL PROCESSING FOR OFDM COMMUNICATIONS OVER FREQUENCY-SELECTIVE FADING CHANNELS." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606486.

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International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California<br>In this paper, we propose applying the spatio-temporal signal processing and OFDM techniques to a multiple-antenna system in order to achieve high data rate and high performance transmission capability. In order to perform real time processing for this system, we also propose a complexity reduced QR beamforming algorithm. The performance of the proposed system has been investigated for a two-ray frequency-selective fading model by extensive computer
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29

Gao, Wei, Shih-Ho Wang, and Kamilo Feher. "BLIND EQUALIZATION FOR FQPSK AND FQAM SYSTEMS IN MULTIPATH FREQUENCY SELECTIVE FADING CHANNELS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607298.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Blind adaptive equalization with application for Non-Linearly Amplified (NLA) quadrature amplitude modulation (QAM) systems in multipath selective fading channels is presented. With an offset sampling strategy in the receiver, the proposed blind equalization using Constant Modulus Algorithm (CMA) exhibits a fast convergent speed for a family of quadrature modulated systems in NLA and multipath fading channels. Feher’s patented Quadrature Phase Shift Keying (F
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30

Eddaghel, Masoud. "Mitigating PAPR in cooperative wireless networks with frequency selective channels and relay selection." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/16339.

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The focus of this thesis is peak-to-average power ratio (PAPR) reduction in cooperative wireless networks which exploit orthogonal frequency division multiplexing in transmission. To reduce the PAPR clipping is employed at the source node. The first contribution focuses upon an amplify-and-forward (AF) type network with four relay nodes which exploits distributed closed loop extended orthogonal space frequency block coding to improve end-to-end performance. Oversampling and filtering are used at the source node to reduce out-of-band interference and the iterative amplitude reconstruction decod
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31

Pham, Edward Carleton University Dissertation Engineering Electrical. "SER prediction for transmission of PSAM 16-QAM in frequency selective fading channels." Ottawa, 1992.

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32

Song, Liying Tugnait Jitendra K. "Channel estimation and equalization for doubly-selective channels using basis expansion models." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Electrical_and_Computer_Engineering/Dissertation/Song_Liying_29.pdf.

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33

D'Amours, Claude. "Differential and coherent RAKE receivers for DS-CDMA in frequency-selective Rayleigh fading channels." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/10753.

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The performance of digital communications over frequency-selective Rayleigh fading channels can be quite poor, thus diminishing, the capacity of a DS-CDMA system. This thesis compares differential detection, multiple symbol differential detection and pilot symbol-aided coherent detection of a direct-sequence spread spectrum signal for this channel. Diversity reception is obtained through RAKE reception, and both equal gain and maximal gain diversity combining are considered. The improvement provided by some error correcting convolutional codes arid interleaving are also studied.
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34

Kao, Chi-Han. "Performance of IEEE 802.11a wireless LAN standard over frequency-selective, slow, ricean fading channels." Thesis, Monterey California. Naval Postgraduate School, 2002. http://hdl.handle.net/10945/5020.

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Approved for public release, distribution is unlimited<br>With the rapidly growing demand for more reliable and higher data rate wireless communications, the Institute of the Electrical and Electronics Engineers (IEEE) 802.11 working group approved a standard for 5 GHz band, wireless local area networks (WLAN) in 1999. This standard, IEEE 802.11a, supports data rates from 6 up to 54 Mbps, and uses orthogonal frequency division multiplexing (OFDM) for transmission in indoor wireless environments. This thesis examines the performance of the IEEE 802.11a standard for different combinations of sub
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35

Rice, Michael, Gaston David de, Adam Davis, Gus German, and Christian Bettwieser. "ARTM CHANNEL SOUNDING RESULTS – AN INVESTIGATION OF FREQUENCY SELECTIVE FADING ON AERONAUTICAL TELEMETRY CHANNELS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608746.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Initial results of wideband channel sounding experiments sponsored by the Advanced Range Telemetry (ARTM) program are presented. Data collected at Edwards EAFB during the Winter 1998-1999, are analyzed in the frequency domain to estimate the number, strength, and delays of the significant multipath reflections observed during the experiments. We observe that the channel is adequately modeled using two or three multipath reflections. The multipath fade events are c
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36

Kao, Chi-han. "Performance of IEEE 802.11a wireless LAN standard over frequency-selective, slow, ricean fading channels /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FKao.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, September 2002.<br>Thesis advisor(s): R. Clark Robertson, Roberto Cristi. Includes bibliographical references (p. 93-94). Also available online.
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37

Wavegedara, Kapila Chandika B. "Advanced receivers for space-time block-coded single-carrier transmissions over frequency-selective fading channels." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/620.

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In recent years, space-time block coding (STBC) has emerged as an effective transmit-diversity technique to combat the detrimental effects of channel fading. In addition to STBC, high-order modulation schemes will be used in future wireless communication systems aiming to provide ubiquitous-broadband wireless access. Hence, advanced receiver schemes are necessary to achieve high performance. In this thesis, advanced and computationally-efficient receiver schemes are investigated and developed for single-carrier space-time (ST) block-coded transmissions over frequency-selective fading (FSF) cha
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38

Pham, Tri. "Soft Detection of Trellis Coded CPM in Frequency-SelectiveChannels." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2012. http://hdl.handle.net/10092/7178.

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Non-linear continuous phase modulation has constant envelope and spectral efficiency, which are desirable for public safety communication systems where both bandwidth and power are limited. A practical design of an innovation based receiver for partial response CPM was recently developed for public safety applications. It is in the form of a linear predictive demodulator with a coefficient look up table. The demodulator shows great performance over multipath fading channels without channel equalization and promises a significant contribution to public safety communication. The work in this t
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Liang, Yan. "Integrated Frequency-Selective Conduction Transmission-Line EMI Filter." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26360.

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The multi-conductor lossy transmission-line model and finite element simulation tool are used to analyze the high-frequency attenuator and the DM transmission-line EMI filter. The insertion gain, transfer gain, current distribution, and input impedance of the filter under a nominal design are discussed. In order to apply the transmission-line EMI filter to power electronics systems, the performance of the filter under different dimensions, material properties, and source and load impedances must be known. The influences of twelve parameters of the DM transmission-line EMI filter on the cut-off
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Gong, Yi. "Space-time coding for high data-rate wireless communications over space and frequency selective fading channels /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202002%20GONG.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2002.<br>Includes bibliographical references (leaves 105-114). Also available in electronic version. Access restricted to campus users.
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41

Manglani, Manish. "Wavelet Modulation in Gaussian and Rayleigh Fading Channels." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34396.

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Wavelet Modulation (WM)---also referred to as fractal modulation---simultaneously sends data at multiple rates through an unknown channel. This novel multirate diversity strategy offers improved message recovery over conventional modulation techniques: if the message is not received at one rate due to the channel disturbances, it can be received at another rate where the channel is clear. Previous research has demonstrated the performance of wavelet modulation in Gaussian channels. This paper extends the investigation to the performance of wavelet modulation in time varying channels. We sh
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42

Siyau, Ming Fei. "A novel training-based MIMO channel estimation scheme for layered space-time systems in frequency selective wireless channels." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/3464.

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New development in wireless technology using multiple antennas with appropriate space-time processing has recently become the new frontier of wireless communication systems due to the potential for providing very high spectral efficiency and enormous capacity improvement over the conventional wireless radio communications. The technical advances in using the multiple-input multiple-output (MIMO) wireless links present a promising breakthrough in resolving the bottleneck of current capacity limitation for future intensive wireless networks. The MIMO wireless systems utilize multiple antennas at
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43

LI, XIANGTAO. "PERFORMANCE ANALYSIS OF DECORRELATING DETECTORS FOR DUAL-RATE SYNCHRONOUS DS/CDMA SYSTEMS OVER FREQUENCY-SELECTIVE RAYLEIGH FADING CHANNELS." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1028644891.

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Siyau, M. F. "A Novel training-based MIMO channel estimation scheme for layered space-time systems in frequency selective wireless channels." Thesis, Department of Aerospace, Power & Sensors, 2009. http://hdl.handle.net/1826/3464.

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New development in wireless technology using multiple antennas with appropriate space-time processing has recently become the new frontier of wireless communication systems due to the potential for providing very high spectral efficiency and enormous capacity improvement over the conventional wireless radio communications. The technical advances in using the multiple-input multiple-output (MIMO) wireless links present a promising breakthrough in resolving the bottleneck of current capacity limitation for future intensive wireless networks. The MIMO wireless systems utilize multiple antennas at
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45

Chi, Xuan. "The Impact of Channel Estimation Error on Space-Time Block and Trellis Codes in Flat and Frequency Selective Channels." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/33963.

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Recently multiple antenna systems have received significant attention from researchers as a means to improve the energy and spectral efficiency of wireless systems. Among many classes of schemes, Space-Time Block codes (STBC) and Space-Time Trellis codes (STTC) have been the subject of many investigations.<p> Both techniques provide a means for combatting the effects of multipath fading without adding much complexity to the receiver. This is especially useful in the downlink of wireless systems. In this thesis we investigate the impact of channel estimation error on the performance of both ST
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46

Fhima, Hayfa. "Study and implementation of widely linear (WL) receiver for filter bank based multicarrier (FBMC-OQAM) modulations over frequency selective channels." Electronic Thesis or Diss., Paris, CNAM, 2019. http://www.theses.fr/2019CNAM1266.

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Parmi les principales raisons qui ont aboutit au progrès technique et au développement des systèmes de communication sans fils modernes, on trouve la forte demande des besoins et des exigences des différents utilisateurs. Ainsi, depuis les systèmes de deuxième génération (2G), de nombreux changements ont eu lieu, principalement, le passage des modulations (WF) mono-porteuses aux modulations multi-porteuses (MC) introduites pour la transmission de la 4G en sens descendant.En effet, l'idée d'introduire les formes d'ondes MC est de se débarrasser des effets du canal de propagation, en relâchant l
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47

Franklin, Daniel Robert. "Enhancements to channel models, DMT modulation and coding for channels subject to impulsive noise." School of Electrical, Computer & Telecommunications Engineering - Faculty of Informatics, 2007. http://ro.uow.edu.au/theses/18.

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DMT modulation is an OFDM-based modulation scheme used in ADSL and proposed for various other high-speed broadband access systems. Existing mathematical models for transmission lines make a number of simplistic assumptions about the distribution of noise, in particular, the assumption that impulsive noise originates at either end of the transmission line. It is therefore desirable to improve the accuracy of the transmission-line model to allow better prediction of broadband modem performance, and to further improve the bit-allocation algorithms and equaliser designs used in DMT-based modems. T
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48

Kalogrias, Christos. "Performance analysis of the IEEE 802.11A WLAN standard optimum and sub-optimum receiver in frequency-selective, slowly fading Nakagami channels with AWGN and pulsed noise jamming." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FKalogrias.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Systems Engineering)--Naval Postgraduate School, March 2004.<br>Thesis advisor(s): Clark Robertson. Includes bibliographical references (p. 143). Also available online.
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49

Fung, Victor. "Bit error simulation of FSK, BPSK, and pi/4 DQPSK in flat and frequency-selective fading mobile radio channels using two-ray and measurement- based impulse response models." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08142009-040410/.

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Osman, Ammar. "Low-complexity OFDM transceiver design for UMTS-LTE." Thesis, Blekinge Tekniska Högskola, Avdelningen för signalbehandling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3716.

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Over the past two decades the mobile wireless communication systems has been growing fast and continuously. Therefore, the standardization bodies together with wireless researchers and mobile operators around the globe have been constantly working on new technical specifications in order to meet the demand for this rapid growth. The 3rd Generation Partnership Project (3GPP) one of the largest of such standardization bodies, works on developing the current third generation (3G) mobile telecommunication systems towards the future 4th generation. Research towards meeting the higher demands for hi
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