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Dissertations / Theses on the topic 'MIMO decoder'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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1

Krishnan, Praveen G. "Fast sphere decoder for MIMO systems." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/umrthes_09007dcc80318823.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 16, 2007) Includes bibliographical references (p. 38).

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2

Quesenberry, Joshua Daniel. "Communication Synthesis for MIMO Decoder Matrices." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/51149.

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The design in this work provides an easy and cost-efficient way of performing an FPGA implementation of a specific algorithm through use of a custom hardware design language and communication synthesis. The framework is designed to optimize performance with matrix-type mathematical operations. The largest matrices used in this process are 4x4 matrices. The primary example modeled in this work is MIMO decoding. Making this possible are 16 functional unit containers within the framework, with generalized interfaces, which can hold custom user hardware and IP cores. <p> This framework, which

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3

Mohammed, Karim Ossama. "A MIMO decoder accelerator for next generation wireless communications." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1875366181&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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4

Patel, Vipul Hiralal. "A system on programmable chip approach for MIMO lattice decoder." ScholarWorks@UNO, 2004. http://louisdl.louislibraries.org/u?/NOD,167.

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Thesis (M.S.)--University of New Orleans, 2004.<br>Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Electrical Engineering."--Thesis t.p. Vita. Includes bibliographical references.

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5

Lim, Melvin Chi Hearn. "Linear Precoder and Decoder Design for the Multiuser MIMO Downlink." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509007.

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6

Kapfunde, Goodwell. "Near-capacity sphere decoder based detection schemes for MIMO wireless communication systems." Thesis, University of Hertfordshire, 2013. http://hdl.handle.net/2299/11350.

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The search for the closest lattice point arises in many communication problems, and is known to be NP-hard. The Maximum Likelihood (ML) Detector is the optimal detector which yields an optimal solution to this problem, but at the expense of high computational complexity. Existing near-optimal methods used to solve the problem are based on the Sphere Decoder (SD), which searches for lattice points confined in a hyper-sphere around the received point. The SD has emerged as a powerful means of finding the solution to the ML detection problem for MIMO systems. However the bottleneck lies in the de

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Singh, Arun Kumar. "Le compromis Débit-Fiabilité-Complexité dans les systèmes MMO multi-utilisateurs et coopératifs avec décodeurs ML et Lattice." Thesis, Paris, ENST, 2012. http://www.theses.fr/2012ENST0005/document.

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Dans les télécommunications, le débit-fiabilité et la complexité de l’encodage et du décodage (opération à virgule flottante-flops) sont largement reconnus comme représentant des facteurs limitant interdépendants. Pour cette raison, tout tentative de réduire la complexité peut venir au prix d’une dégradation substantielle du taux d’erreurs. Cette thèse traite de l’établissement d’un compromis limite fondamental entre la fiabilité et la complexité dans des systèmes de communications « outage »-limités à entrées et sorties multiples (MIMO), et ses scénarios point-à-point, utilisateurs multiple,

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Sevelimedu, Veeravalli Vinodh. "Study of MIMO, orthogonal codes and core operator architecture design for ML decoder." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10155.

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<p>In the high-end research process of wireless systems and in the race for the development of the new technologies, MIMO (Multiple Input, Multiple Output) is getting more attention now days. It has a high potential usage in the 3G and 4G communications and beyond. The MIMO based system has got the ability to increase the data throughput in spectrum-limited conditions. With the increase and complexity of wireless applications, the spectrum efficiency improvement in the physical layer will be saturated. MIMO is predicted to be one of the major features for the next generation wireless networkin

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9

Correia, Tiago Miguel Pina. "FPGA implementation of Alamouti encoder/decoder for LTE." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12679.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>Motivados por transmissões mais rápidas e mais fiáveis num canal sem fios, os sistemas da 4G devem proporcionar processamento de dados mais rápido a baixa complexidade, elevadas taxas de dados, assim como robustez na performance reduzindo também, a latência e os custos de operação. LTE apresenta, na sua camada física, tecnologias como OFDM e MIMO que prometem alcançar elevadas taxas de dados e aumentar a eficiência espectral. Especificamente a camada física do LTE emprega OFDMA para downlink e SC-FDMA para uplink. A tecnologia MIMO per

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10

El, chall Rida. "Récepteur itératif pour les systèmes MIMO-OFDM basé sur le décodage sphérique : convergence, performance et complexité." Thesis, Rennes, INSA, 2015. http://www.theses.fr/2015ISAR0019/document.

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Pour permettre l’accroissement de débit et de robustesse dans les futurs systèmes de communication sans fil, les processus itératifs sont de plus considérés dans les récepteurs. Cependant, l’adoption d’un traitement itératif pose des défis importants dans la conception du récepteur. Dans cette thèse, un récepteur itératif combinant les techniques de détection multi-antennes avec le décodage de canal est étudié. Trois aspects sont considérés dans un contexte MIMOOFDM: la convergence, la performance et la complexité du récepteur. Dans un premier temps, nous étudions les différents algorithmes de

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11

Jaldén, Joakim. "Detection for multiple input multiple output channels : analysis of sphere decoding and semidefinite relaxation." Doctoral thesis, KTH, Signalbehandling, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4199.

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The problem of detecting a vector of symbols, drawn from a finite alphabet and transmitted over a multiple-input multiple-output (MIMO) channel with Gaussian noise, is of central importance in digital communications and is encountered in several different applications. Examples include, but are not limited to; detection of symbols spatially multiplexed over a multiple-antenna channel and the multiuser detection problem in a code division multiple access (CDMA) system. Two algorithms previously proposed in the literature are considered and analyzed. Both algorithms have their origin in other fi

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12

Palanivelu, Arul Durai Murugan. "Tree search algorithms for joint detection and decoding." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1145039374.

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13

Singh, Arun Kumar. "Le compromis Débit-Fiabilité-Complexité dans les systèmes MMO multi-utilisateurs et coopératifs avec décodeurs ML et Lattice." Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0005.

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Dans les télécommunications, le débit-fiabilité et la complexité de l’encodage et du décodage (opération à virgule flottante-flops) sont largement reconnus comme représentant des facteurs limitant interdépendants. Pour cette raison, tout tentative de réduire la complexité peut venir au prix d’une dégradation substantielle du taux d’erreurs. Cette thèse traite de l’établissement d’un compromis limite fondamental entre la fiabilité et la complexité dans des systèmes de communications « outage »-limités à entrées et sorties multiples (MIMO), et ses scénarios point-à-point, utilisateurs multiple,

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14

Barbero, Liñan Luis G. "Rapid prototyping of a fixed-complexity sphere decoder and its application to iterative decoding of turbo-MIMO systems." Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/11903.

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This thesis concentrates on the analysis of the sphere decoder (SD) for MIMO detection. It provides optimal maximum likelihood (ML) performance with reduced complexity compared to the maximum likelihood detector (MLD). However, a field-programmable gate array (FPGA) implementation of the algorithm presents several disadvantages due to its variable complexity and the sequential nature of its tree search. This research proposes a fixed-complexity sphere decoder (FSD) to overcome the drawbacks of the SD. It provides a fixed complexity and achieves quasi-maximum likelihood (ML) performance, combin

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15

Younis, Abdelhamid. "Spatial modulation : theory to practice." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/8990.

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Spatial modulation (SM) is a transmission technique proposed for multiple–input multiple– output (MIMO) systems, where only one transmit antenna is active at a time, offering an increase in the spectral efficiency equal to the base–two logarithm of the number of transmit antennas. The activation of only one antenna at each time instance enhances the average bit error ratio (ABER) as inter–channel interference (ICI) is avoided, and reduces hardware complexity, algorithmic complexity and power consumption. Thus, SM is an ideal candidate for large scale MIMO (tens and hundreds of antennas). The a

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16

Aubert, Sébastien. "Advanced Techniques for Achieving Near Maximum-Likelihood Soft Detection in MIMO-OFDM Systems and Implementation Aspects for LTE/LTE-A." Phd thesis, INSA de Rennes, 2011. http://tel.archives-ouvertes.fr/tel-00730797.

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Cette thèse traite des systèmes MIMO à multiplexage spatial, associés à la modulation OFDM. L'étude s'attarde particulièrement sur les systèmes 4x4, inclus ou à l'étude dans les normes 3GPP LTE et 3GPP LTE-A. Ces dimensions particulières nécessitent une étude de conception poussée du récepteur. Il s'agit notamment de proposer des détecteurs qui affichent à la fois de bonnes performances, une faible latence et une complexité de calcul réalisable dans un système embarqué. Le défi consiste plus particulièrement à proposer un détecteur offrant des performances quasi-optimales, tout en ne nécessita

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17

XIAO, GUOPING. "VLSI architectures design for encoders of High Efficiency Video Coding (HEVC) standard." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2644058.

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The growing popularity of high resolution video and the continuously increasing demands for high quality video on mobile devices are producing stronger needs for more efficient video encoder. Concerning these desires, HEVC, a newest video coding standard, has been developed by a joint team formed by ISO/IEO MPEG and ITU/T VCEG. Its design goal is to achieve a 50% compression gain over its predecessor H.264 with an equal or even higher perceptual video quality. Motion Estimation (ME) being as one of the most critical module in video coding contributes almost 50%-70% of computational complexity

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18

HICKS, CHRISTOPHER D. "PERFORMANCE ANALYSIS OF MIMO LINEAR PRECODERS/DECODERS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1154397576.

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19

Varadarajan, Badri. "The Design of Linear Space-Time Codes for Quasi-static Flat-fading Channels." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5030.

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The reliability and data rate of wireless communication have traditionally been limited by the presence of multipath fading in wireless channels. However, dramatic performance improvements can be obtained by the use of multiple transmit and receive antennas. Specifically, multiple antennas increase reliability by providing diversity gain, namely greater immunity to deep channel fades. They also increase data rates by providing multiplexing gain, i.e., the ability to multiplex multiple symbols in one signaling interval. Harvesting the potential benefits of multiple antennas requires the use o

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20

Liang, Ying, and 梁瑩. "A study on low complexity near-maximum likelihood spherical MIMO decoders." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43703987.

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21

Liang, Ying. "A study on low complexity near-maximum likelihood spherical MIMO decoders." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B43703987.

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22

Liang, Cao. "Hardware/Software Co-Design Architecture and Implementations of MIMO Decoders on FPGA." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/416.

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During the last years, multiple-input multiple-output (MIMO) technology has attracted great attentions in the area of wireless communications. The hardware implementation of MIMO decoders becomes a challenging task as the complexity of the MIMO system increases. This thesis presents hardware/software co-design architecture and implementations of two typical lattice decoding algorithms, including Agrell and Vardy (AV) algorithm and Viterbo and Boutros (VB) algorithm. Three levels of parallelisms are analyzed for an efficient implementation with the preprocessing part on embedded MicroBlaze soft

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23

Jin, Jie. "Low power design for high performance wireless digital baseband building blocks /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20JIN.

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24

Azarian, Yazdi Kambiz. "Outage limited cooperative channels protocols and analysis /." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1154740723.

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25

Liao, Yen-Chin, and 廖彥欽. "Research on Sphere/LDPC Decoder for Coded-MIMO Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/10789537397358749203.

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博士<br>國立交通大學<br>電子工程系所<br>96<br>This dissertation presents algorithm designs for sphere decoders and low-density parity check (LDPC) code decoders in multi-input multi-output (MIMO) systems from implementation point of view. Based on statistical techniques, complexity reduction schemes are proposed. Sphere decoders of hard-decision outputs and LDPC decoding algorithms in AWGN channel are discussed first. Then the sphere decoders with soft-decision outputs for channel-coded MIMO systems are investigated. Sphere decoding algorithm is one realization of maximum likelihood signal detection for

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26

Hu, Kai-Shiang, and 胡凱翔. "Design of STBC Decoder in MIMO systems for IEEE802.16 standard." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/04596239693248357243.

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碩士<br>雲林科技大學<br>電機工程系碩士班<br>96<br>This thesis is focused on the investigation of the decoder structure of space-time block code (STBC) in a multiple input multiple output (MIMO) system. At the receiver, the received STBC encoded signals are respectively decoded by using two algorithms, namely, the maximum likelihood (ML) decoder and the least-square zero-forcing (LS-ZF) decoder. The decoding efficiency and hardware complexity for both algorithms are presented. We have found from the simulation results that the performance of an ML decoder is about 4 dB better than that of an LS-ZF decoder. To

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Cheng, Yong-Lin, and 鄭詠霖. "Efficient Design of Soft-Ouput Decoder for MIMO-OFDM Systems." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/61839920873329275460.

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碩士<br>國立中興大學<br>電機工程學系所<br>103<br>As the development of communication technology, demands of high data rates of wireless communications grow rapidly. The multiple antenna system plays an important role. The reason is that channel capacity increases linearly with the minimum number of antennas. Therefore, it has the advantage over the single input single output (SISO) system in terms of high data transmission rates. However, interference between multiple antennas needs to be overcome. In addition, low density parity check (LDPC) codec is added because it can approach the Shannon Limit and helps

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Chen, Hsin-Ta, and 陳信達. "A Low Complexity Look-Ahead Sphere Decoder for MIMO Detection." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/12663278057776005265.

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碩士<br>國立中正大學<br>通訊工程研究所<br>99<br>Traditional depth-first sphere decoder is an algorithm which is capable of obtaining the optimal ML solution by using the idea of tree search. The algorithm has much lower complexity compared to the exhaustive search, but requires reverse searching operations, making the overall complexity varying for different channel realizations. For the ease of hardware implementation, K-best algorithm has been proposed. K-best algorithm finds K nodes of relative small cumulative PED(partial Euclidean distance) in each layer and then traverse down to the next layer. Since n

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Cheng-Ming, Chen. "A New Reduced-Complexity Sphere Decoder for MIMO Spatial Multiplexing System." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1607200623202900.

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Chen, Cheng-Ming, and 陳楨明. "A New Reduced-Complexity Sphere Decoder for MIMO Spatial Multiplexing System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/34656840105342549856.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>94<br>In this thesis we propose an algorithm which combines the Sphere Decoding algorithm (SDA) and the Ordered Successive Interference Cancellation algorithm (OSIC) to reduce the computation time of the SDA. We name it SD-OSIC algorithm. This algorithm has the near-ML (Maximum Likelihood) Performance and needs to search fewer lattice points inside the sphere radius, hence the searching problem are reduced to a lower dimension ones. We also derive the number of multiplication and addition operations of SD-OSIC and conventional SDA. Numerical simulation reveals ou

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Cheng-ChiehHuang and 黃政傑. "Low-Complexity MIMO Detector Based on the Fixed-Complexity Sphere Decoder." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/56496529955246061661.

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32

Wang, Chihjung, and 王致融. "Low Complexity Soft-Output Detector for MIMO System with Viterbi Decoder." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/25188115470753682658.

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碩士<br>國立中正大學<br>通訊工程研究所<br>99<br>The multiple-input multiple-output system is able to provide high transmission data rate for wireless communication systems. The baseband MIMO detectors are divided into two categories, the hard-output and soft-output detectors, where the latter one is able to work together with an error control code (ECC) decoder to yield a lower coded BER performance. In the soft-output detector, the soft a posteriori probability (APP) is computed and is to be sent to the following ECC decoder. To provide complete APP information, all possible data must be calculated. This ma

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Wang, Hsiao-Chi, and 王曉淇. "A High Throughput Low Complexity Soft-output Sphere Decoder for MIMO Communications." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/82736348986678769250.

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碩士<br>國立清華大學<br>電機工程學系<br>97<br>In this thesis, a high throughput fixed complexity soft-output sphere decoder supporting QPSK, 16-QAM, and 64-QAM modulation in the 4x4 MIMO system is proposed. For achieving soft-output, the proposed tree search algorithm is presented. Some simulation results help to modify the tree search algorithm of the original fixed-complexity sphere decoder (FSD) for soft-output detection. Compared with the optimal soft-output sphere decoder, the proposed soft-output FSD (SFSD) has a little frame error rate (FER) degradation (0.5dB), but the benefit is that SFSD has fixe

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Wang, To-Ping, and 王拓評. "Design of a New Complex Sphere Decoder for Soft-Output MIMO Detection." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/81987854974940585916.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>95<br>The services, such as on-line videos, high definition TV (HDTV), interactive games, provided by the next generation wireless communication systems produce the demand for much higher throughput and better Quality of Service (QoS) under the situation of limited bandwidth. Nowadays, OFDM is widely adopted to improve bandwidth utilization in many communication systems and has become the main modulation technique of many standards. In the future, MIMO will be the next widely accepted technique because of its provision for diversity and spectrum efficiency. MIMO

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Lee, Tsung-Hsueh, and 李宗學. "Design and Implementation of a New Complex Sphere Decoder for MIMO Detection." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/84274405802171326659.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>95<br>More and more services are provided in the next generation wireless communicaiton systems, including on-line videos, high definition TV (HDTV), interactive games and so on. The demand for throughput and QoS is getting higher. However, the bandwidth is limited. OFDM is widely adopted in many communication systems and has become a main modulation technique of many standards. MIMO will be the next widely accepted technique because of its provision for diversity and/or spectrum efficiency. To apply the MIMO techniques, the number of transmitting and receiving an

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Lin, Hsin-Lei, and 林心蕾. "Design of Synchronization and Decoder Circuits for MIMO-OFDM Wireless Communication Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/33916429550633495617.

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博士<br>國立中興大學<br>電機工程學系所<br>96<br>The designs of synchronization and MIMO decoder are proposed in this dissertation since the MIMO method and OFDM technique can be used for improving either the performance or the data rate of wireless communication. The synchronization is investigated since the frequency is more sensitive in OFDM system. A novel digital oscillator of synchronization combined with the CORDIC algorithm and Sinusoidal function is designed for the MIMO wireless communication. The synchronization was implemented using TSMC 0.18 μm 1P6M CMOS technology at 1.8V, and the core area was

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Chen, Chieh-Yu, and 陳婕妤. "Power-Aware Space-Time-Trellis-Coded MIMO Decoder with Embedded SNR Estimator." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/46414151585951822334.

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碩士<br>國立清華大學<br>電機工程學系<br>99<br>Space-time trellis code (STTC) has been widely applied to coded multiple-input multiple-output (MIMO) systems because of its gains in coding and diversity. However, its great decoding complexity makes it less promising in chip realization compared to the space-time block code (STBC). The complexity of STTC decoding lies in the branch metric calculation in the Viterbi algorithm. Compared with the Viterbi decoder for convolutional code, the STTC Viterbi decoder has a large amount of the complex-number multiplications to calculate the branch metrics. Besides, the a

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Chen, Yan-Tong, and 陳彥同. "An Integrated Message-Passing Detector and Decoder for Polar-Coded Massive MIMO Systems." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/00784071685577586836.

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碩士<br>國立交通大學<br>電子研究所<br>105<br>A 1.34mm2 40nm CMOS soft-output message-passing detector and bidirectional polar decoder are designed for a QPSK massive MIMO system. The proposed reliable symbol interference cancellation technique and adaptive variance detection reduce the complexity of message passing detector (MPD) by more than 90% and generate soft log likelihood ratio (LLR) information for an ECC decoder. Exploiting a folded memory configuration saves half memory elements. An interleaved bidirectional propagation double column polar decoder is proposed to reduce the total latency of the wh

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Sung, Chih-Sheng, and 宋志晟. "A Complex K-Best Sphere Decoder with Efficient Search Design for MIMO Systems." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/23930620613307534003.

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碩士<br>國立交通大學<br>電信工程系所<br>97<br>In wireless communication systems, multiple-input and multiple-output (MIMO) technology offers significant increases in data rate and link range without additional bandwidth or transmit power. However, the design of high performance and low complexity receivers for MIMO systems is a challenging task. The maximum-likelihood (ML) detection is the optimal detection scheme but its complexity grows exponentially with the number of transmit antennas. The sphere decoding algorithm (SDA) achieves the ML performance with reduced complexity. Nevertheless, the throughput o

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Yeh, Che-hung, and 葉哲宏. "Joint LDPC Decoder and Channel Estimator for MIMO-OFDM Systems in Fast Fading Channel." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/77552901953575219516.

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碩士<br>國立中正大學<br>通訊工程研究所<br>95<br>Multiple input multiple output- orthogonal frequency division multiplexing (MIMO-OFDM) that is a highly efficient data transmission system does not increase any transmission power or bandwidth to improve the channel capacity. For exploiting the space, time and frequency diversity, the low density parity-check (LDPC) is used as a channel coding with a built-in interleaver. We used suboptimal soft demapping algorithms, linear minimum mean square error- soft interference cancellation (LMMSE-SIC), to reduce computational complexity caused a large constellation size

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Huang, Li-Wen, and 黃立文. "An Interference Alignment Approach to Joint Precoder and Decoder Designs over Multiuser MIMO Interference Channels." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/75405225315804070083.

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碩士<br>國立中央大學<br>通訊工程研究所<br>100<br>In multiuser interference channels, each transmitter desires to communicate its data to the intended receiver, and the multiuser interference will cause severe performance degradation on the sum rate performance if the interference signals are not appropriately mitigated. Recently, the idea of interference alignment has been emerged to utilize the spatial dimension offered by multiple antennas to overcome the interference problem and achieve the maximum sum rate performance. Although there have been some interference alignment approaches for designing precoder

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Botha, P. R. (Philippus Rudolph). "Iterative decoding of space-time-frequency block coded mimo concatenated with LDPH codes." Diss., 2013. http://hdl.handle.net/2263/33344.

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In this dissertation the aim was to investigate the usage of algorithms found in computer science and apply suitable algorithms to the problem of decoding multiple-input multipleoutput (MIMO) space-time-frequency block coded signals. It was found that the sphere decoder is a specific implementation of the A* tree search algorithm that is well known in computer science. Based on this knowledge, the sphere decoder was extended to include a priori information in the maximum a posteriori probability (MAP) joint decoding of the STFC block coded MIMO signals. The added complexity the addition

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Louw, Daniel Johannes. "Non-binary LDPC coded STF-MIMO-OFDM with an iterative joint receiver structure." Diss., 2010. http://hdl.handle.net/2263/28061.

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The aim of the dissertation was to design a realistic, low-complexity non-binary (NB) low density parity check (LDPC) coded space-time-frequency (STF) coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with an iterative joint decoder and detector structure at the receiver. The goal of the first part of the dissertation was to compare the performance of different design procedures for NB-LDPC codes on an additive white Gaussian noise (AWGN) channel, taking into account the constraint on the code length. The effect of quantisation on the performa

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Pradhan, Ashish Kumar. "Energy Efficient Flexible Baseband Processing for Mobile and Cognitive Radios." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/4278.

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Wireless communication has become an integral part of human life, and one of the dominating applications in today’s world. Mobile communication devices are the largest consumer electronic group in terms of volume. In 2007, there was an estimated 3.3 billion mobile telephone subscriptions. This number is roughly half of the world's population. Applications like web browsing, online-shopping, email, video streaming, video conferencing and mobile-banking have all become key applications for mobile devices. As the demand for such services increase day by day, there is a scarcity of available spect

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Al-Quwaiee, Hessa. "Bidirectional Fano Algorithm for Lattice Coded MIMO Channels." Thesis, 2013. http://hdl.handle.net/10754/292300.

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Recently, lattices - a mathematical representation of infinite discrete points in the Euclidean space, have become an effective way to describe and analyze communication systems especially system those that can be modeled as linear Gaussian vector channel model. Channel codes based on lattices are preferred due to three facts: lattice codes have simple structure, the code can achieve the limits of the channel, and they can be decoded efficiently using lattice decoders which can be considered as the Closest Lattice Point Search (CLPS). Since the time lattice codes were introduced to Multiple In

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Ali, Konpal S. "On Lattice Sequential Decoding for Large MIMO Systems." Thesis, 2014. http://hdl.handle.net/10754/316732.

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Due to their ability to provide high data rates, Multiple-Input Multiple-Output (MIMO) wireless communication systems have become increasingly popular. Decoding of these systems with acceptable error performance is computationally very demanding. In the case of large overdetermined MIMO systems, we employ the Sequential Decoder using the Fano Algorithm. A parameter called the bias is varied to attain different performance-complexity trade-offs. Low values of the bias result in excellent performance but at the expense of high complexity and vice versa for higher bias values. We attempt to boun

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Jenkal, Ravi S. "Architectures and design methodology for energy efficient MIMO decoders." 2008. http://www.lib.ncsu.edu/theses/available/etd-11062008-130200/unrestricted/etd.pdf.

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Natarajan, Lakshmi Prasad. "Low-Complexity Decoding and Construction of Space-Time Block Codes." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3372.

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Space-Time Block Coding is an efficient communication technique used in multiple-input multiple-output wireless systems. The complexity with which a Space-Time Block Code (STBC) can be decoded is important from an implementation point of view since it directly affects the receiver complexity and speed. In this thesis, we address the problem of designing low complexity decoding techniques for STBCs, and constructing STBCs that achieve high rate and full-diversity with these decoders. This thesis is divided into two parts; the first is concerned with the optimal decoder, viz. the maximum-likelih

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Natarajan, Lakshmi Prasad. "Low-Complexity Decoding and Construction of Space-Time Block Codes." Thesis, 2013. http://etd.iisc.ernet.in/2005/3372.

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Space-Time Block Coding is an efficient communication technique used in multiple-input multiple-output wireless systems. The complexity with which a Space-Time Block Code (STBC) can be decoded is important from an implementation point of view since it directly affects the receiver complexity and speed. In this thesis, we address the problem of designing low complexity decoding techniques for STBCs, and constructing STBCs that achieve high rate and full-diversity with these decoders. This thesis is divided into two parts; the first is concerned with the optimal decoder, viz. the maximum-likelih

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Ben, Atitallah Ismail. "High-Dimensional Analysis of Convex Optimization-Based Massive MIMO Decoders." Thesis, 2017. http://hdl.handle.net/10754/623468.

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A wide range of modern large-scale systems relies on recovering a signal from noisy linear measurements. In many applications, the useful signal has inherent properties, such as sparsity, low-rankness, or boundedness, and making use of these properties and structures allow a more efficient recovery. Hence, a significant amount of work has been dedicated to developing and analyzing algorithms that can take advantage of the signal structure. Especially, since the advent of Compressed Sensing (CS) there has been significant progress towards this direction. Generally speaking, the signal structur

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