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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 4 lutego 2022

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1

Martin, Philippa Anne. "Adaptive iterative decoding : block turbo codes and multilevel codes." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2001. http://hdl.handle.net/10092/7853.

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New adaptive, iterative approaches to the decoding of block Turbo codes and multilevel codes are developed. Block Turbo codes are considered as they can readily provide high data rates, low decoding complexity and good performance. Multilevel codes are considered as they provide a moderate complexity approach to a high complexity code and can provide codes with good bandwidth efficiency. The work develops two adaptive sub-optimal soft output decoding algorithms for block Turbo codes. One is based on approximation and the other on the distance properties of the component codes. They can be use

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2

Sholiyi, Abiodun Olugbenga. "Irregular block turbo codes for communication systems." Thesis, Swansea University, 2011. https://cronfa.swan.ac.uk/Record/cronfa43150.

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Hirst, Simon. "Iterative decoding techniques for block based error correction codes." Thesis, Lancaster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289060.

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Wang, Charles C., and Tien M. Nguyen. "USING SHORT-BLOCK TURBO CODES FOR TELEMETRY AND COMMAND." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608708.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>The turbo code is a block code even though a convolutional encoder is used to construct codewords. Its performance depends on the code word length. Since the invention of the turbo code in 1993, most of the bit error rate (BER) evaluations have been performed using large block sizes, i.e., sizes greater than 1000, or even 10,000. However, for telemetry and command, a relatively short message (<500 bits) may be used. This paper investigates the turbo-coded BER perf

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5

Šedý, Jakub. "Turbo konvoluční a turbo blokové kódy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219287.

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The aim is to explain the Turbo convolutional and block turbo codes and decoding the secure message. The practical part focuses on the design of a demonstration program in Matlab. The work is divided into four parts. The first two deal with theoretical analysis of coding and decoding. The third section contains a description created a demonstration program that allows you to navigate the process of encoding and decoding. The fourth is devoted to simulation and performance of turbo codes.

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6

Ganti, Kamalakar. "Interleaver design for modified circular simplex turbo block coded modulator." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1107805760.

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Pirestani, Shervin. "Source-controlled block turbo coding." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 69 p, 2008. http://proquest.umi.com/pqdlink?did=994238721&sid=2&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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8

Chapalain-Le, Floc'h Nadine. "Application des Turbo Codes en blocs pour les réseaux locaux sans fil à haut débit." Brest, 2002. http://www.theses.fr/2002BRES2033.

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Cette thèse s'inscrit dans le cadre général des communications numériques et comporte deux parties. La première partie est consacrée à l'évaluation et l'analyse des performances des turbo codes en blocs (BTC) dans l'environnement radio-mobile HIPERLAN/2 (HIgh PERformance Local Area Network type 2). Dans cette partie, deux algorithmes à entrées e t sorties pondérées sont étudiés, l'algorithme sous-optimal de Chase-Pyndiah de complexité raisonnable qui minimise la probabilité d'erreur par mot du code élémentaire et l'algorithme optimal de Nazarov qui minimise la probabilité d'erreur symbole à sy

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9

Chinchilla, Rigoberto. "Interleaver design for the circular simplex turbo block coded modulator." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1178129287.

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Shaheem, Asri. "Iterative detection for wireless communications." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0223.

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[Truncated abstract] The transmission of digital information over a wireless communication channel gives rise to a number of issues which can detract from the system performance. Propagation effects such as multipath fading and intersymbol interference (ISI) can result in significant performance degradation. Recent developments in the field of iterative detection have led to a number of powerful strategies that can be effective in mitigating the detrimental effects of wireless channels. In this thesis, iterative detection is considered for use in two distinct areas of wireless communications.

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11

Zhou, Rong. "Etude des Turbo codes en blocs Reed-Solomon et leurs applications." Rennes 1, 2005. http://www.theses.fr/2005REN1S027.

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Cette thèse porte sur l’étude des turbo codes en blocs (TCB) construits à partir de codes de Reed-Solomon (RS) et sur les applications potentielles de ce schéma de codage. Nous commençons par rechercher un algorithme de décodage à entrée souple applicable aux codes RS et offrant un compromis raisonnable entre performances et complexité. Nous montrons que l’algorithme Chase-II implémenté au niveau binaire répond bien à ces critères lorsque l’on se restreint à la classe des codes RS 1 ou 2-correcteurs. Nous examinons ensuite l’influence du choix des codes RS constituants sur les performances du

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12

Martins, João Paulo Trierveiler. "Turbo decodificadores de bloco de baixa potência para comunicação digital sem fio." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-27092004-161308/.

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Turbo códigos têm se tornado um importante ramo na pesquisa de codificação de canal e já foram adotados como padrão para a terceira geração de comunicação móvel. Devido ao seu alto ganho de codificação, os turbo códigos são vistos como fortes candidatos a serem adotados como padrão das futuras gerações de redes sem fio. Esse esquema de codificação é baseado na decodificação iterativa, onde decodificadores de entrada e saída suaves produzem refinamento da informação a cada iteração. Essa dissertação apresenta resultados de um estudo comparativo entre dois esquemas de codificação: turbo códigos

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13

Gunnam, Kiran Kumar. "Area and energy efficient VLSI architectures for low-density parity-check decoders using an on-the-fly computation." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1049.

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14

Nordmark, Oskar. "Turbo Code Performance Analysis Using Hardware Acceleration." Thesis, Linköpings universitet, Datorteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137666.

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The upcoming 5G mobile communications system promises to enable use cases requiring ultra-reliable and low latency communications. Researchers therefore require more detailed information about aspects such as channel coding performance at very low block error rates. The simulations needed to obtain such results are very time consuming and this poses achallenge to studying the problem. This thesis investigates the use of hardware acceleration for performing fast simulations of turbo code performance. Special interest is taken in investigating diﬀerent methods for generating normally distributed

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15

Ta, Thomas. "Implémentation sur FPGA d'un turbo codeur-décodeur en blocs à haut débit avec une faible complexité." Rennes 1, 2003. http://www.theses.fr/2003REN1S145.

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Inventés par C. Berrou et al. En 1992 à l'ENST Bretagne, les Turbo Codes Convolutifs (TCC) sont devenus la référence des codes correcteurs d'erreurs grâce à leur pouvoir de correction avoisinant la limite théorique de Shannon. En 1993, R. Pyndiah et al. Ont proposé un nouvel algorithme itératif de décodage des codes produits dont les performances sont comparables à celles des TCC, voire meilleures pour les codes de rendement supérieur à 0,7. Cet algorithme baptisé Turbo Code en Blocs (TCB) est en fait un équivalent des TCC pour les codes en blocs. Cette thèse présente une implémentation sur FP

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16

Diatta, Ibrahima. "Étude de turbo codes blocs de Reed-Solomon appliqués à la boucle locale filaire haut débit." Paris 12, 2004. http://www.theses.fr/2004PA120036.

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La demande croissante en débit des applications, combinée au succès de l’ADSL (Asynchronous Digital Subscriber Line), ont poussé à la recherche d’une nouvelle génération de technologies xDSL utilisant la paire bifilaire comme support physique de transmission. L’importance des débits visés (jusqu’à 52 Mbits/s) par ce nouveau système dénommé VDSL (Very high bit rate Digital Subscriber Line) nécessite des traitements du signal et de l’information sophistiqués pour s’approcher de la capacité offerte par la boucle locale filaire. L’objectif de cette thèse e

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17

Diatta, Ibrahima Geller Benoît Lemoine Jacques. "Étude de turbo codes blocs de Reed-Solomon appliqués à la boucle locale filaire haut débit." Créteil : Université de Paris-Val-de-Marne, 2004. http://doxa.scd.univ-paris12.fr:80/theses/th0214120.pdf.

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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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19

Piriou, Erwan. "Apport de la modélisation et de la synthèse haut niveau dans la conception d'architecture flexible dédiée aux turbocodes en blocs." Télécom Bretagne, 2007. http://www.theses.fr/2007TELB0029.

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Cette thèse s’inscrit dans la continuité des travaux menés au sein du département électronique de l'ENST-Bretagne sur l’implantation des turbo-décodeurs de codes produits. Le premier axe de recherche de l’étude concerne l’implantation d’une architecture flexible d’un turbo-décodeur. Le second axe s’intéresse à l’évolution des flots de conception, des langages de description et de leurs applications. L'ensemble est validé par la mise en oeuvre d’un prototype. L’architecture que nous proposons se compose à la fois d’une partie matérielle réalisant la fonction de décodage et d’une partie logiciel

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20

Kwak, Yongjun. "Near Shannon Limit and Reduced Peak to Average Power Ratio Channel Coded OFDM." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10176.

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Solutions to the problem of large peak to average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems are proposed. Although the design of PAPR reduction codewords has been extensively studied and the existence of asymptotically good codes with low PAPR has been proved, still no reduced PAPR capacity achieving code has been constructed. This is the topic of the current thesis.This goal is achieved by implementing a time-frequency turbo block coded OFDM. In this scheme, we design the frequency domain component code to have a PAPR bounded by a small number. The time d

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21

Jacq, Sylvie. "Décodage itératif des codes produits : "turbo-codes en blocs", et évaluations de leurs performances pour des modulations MDP et MAQ sur canal de Gauss et de Rayleigh." Limoges, 1996. http://www.theses.fr/1996LIMO0056.

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Huang, Hsian-Cheng, and 黃憲政. "Investigate block turbo codes and performance analysis." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/17888468956101319955.

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碩士<br>中華大學<br>電機工程學系碩士班<br>98<br>In the last ten years, the wireless communication techniques have been developed rapidly. In the future, the wireless communication systems will be requested to have higher data transmission rate. The transmitted signal will be seriously disturbed by the interference and noise. And then the system performance will be important. The block turbo codes have more excellent decoding performance and low complexity. Thus the decoding algorithm of block turbo codes will be investigated. Finally, for the IEEE 802.16 system, the performance of block turbo codes will be a

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23

Li, Ssu-Hsien, and 李思賢. "Concatenation of Turbo Product Codes and Space Time Block Codes." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/42h364.

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碩士<br>中原大學<br>電機工程研究所<br>92<br>Abstract The multipath wireless channel suffers severe attenuation. The Effective techniques to mitigate multipath fading are time and frequency diversity. Foschini,Gans and Telatar proved that multiple input multiple output can introduce spatial diversity and increased information capacity. These results have motivated a new area in error correcting codes . Space-Time Coding (STC) schemes can combine the channel code design and the use of multiple transmit antennas . The Space Time Trellis Codes (STTC) proposed by Tarkoh combine the trellis coding with symb

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24

Yin, Bo. "Trellis decoding of 3-D block turbo codes." Thesis, 2002. http://spectrum.library.concordia.ca/1815/1/MQ72917.pdf.

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Forward Error Correction (FEC) technique provides a method to detect and correct errors in transmitted data. It is also a valuable technique to reduce the power requirement, thus have an important role in these systems. This reduction in power requirement is achieved at the expense of an increase in bandwidth requirement. The objective is usually to find error control techniques that give good tradeoff between power and bandwidth requirements. In this thesis, we present results for FEC technique using Turbo Block Codes and Turbo Product Codes. It is shown that these codes, not only in theory b

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25

Wang, Chin Tai, and 王璟玳. "A Novel Hybrid Decoder for Block Turbo Codes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/02803500974514200902.

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碩士<br>長庚大學<br>電機工程學系<br>98<br>This thesis proposes extrinsic-information-based decoding algorithms for original block turbo codes (BTCs) and hybrid block turbo codes. Since the number of algebraic decodings dominates the complexity of BTC decoding, it is important for BTC research to reduce the number of algebraic decodings without noticeable loss of bit-error rate performance. In each iterative decoding process, the algorithm compares the extrinsic information of the mth iteration and the (m-1)th iteration to determine when the HIHO decoding starts. Additionally, in BTC decoding, the decoder

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Lee, Jia-Jhan, and 李佳展. "Design Scheme of Space-Time Block Codes Concatenated with Turbo Codes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/65108082199099493675.

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碩士<br>中興大學<br>電機工程學系所<br>95<br>The wireless channel suffers severe attenuation caused by multipath fading. The effective technique to mitigate multipath fading is to use the time or frequency diversity. The communication system with multiple input multiple output can combat the channel attenuation by spatial diversity and increase the channel information capacity. The principle of space-time coding schemes is to combine the concept of channel coding design and multiple transmit antennas, which are then effectively applied to multipath wireless channel. Since the amount of data transfer of

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27

Chow, William. "Concatenated space-time block codes and turbo codes with unstructured interference." 2004. http://hdl.handle.net/1828/452.

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The performance of space-time block codes in providing transmit diversity is severely degraded when strong localized interference is present. This problem is addressed by investigating a recently proposed coherent space-time block code decoding algorithm for unknown interference suppression. The algorithm assumes a Gaussian noise and interference approximation and is based on a cyclic-based maximum-likelihood estimation technique (CML). In this thesis, simulations are done applying CML in a coherent system with unstructured interference to validate previous work. An extension of these results

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Huei-Min, Huang, and 黃暉閔. "Performance Evaluation of Space-Time Block Codes Concatenated with Turbo Codes and LDPC Codes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/96876167066577233975.

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碩士<br>國立中興大學<br>電機工程學系所<br>96<br>The multi-input-multi-output (MINO) technique is one in the breakthroughs of wireless communications. Space time block code (STBC) with maximal ratio receive combining (MRRC) is one of the systems using MIMO to reduce error rate by increasing the numbers of antennas in transmitter and receiver. The system performance can be greatly improved by applying error correcting coding, such as turbo codes and low density party check (LDPC) codes which are known because of performance approaching their to Shannon limits. In this thesis, we first introduce the traditional

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29

Chou, Chih Lin, and 周志霖. "Study on Improving the Performance for Block Turbo Codes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/82122774067019421024.

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碩士<br>長庚大學<br>電機工程學系<br>98<br>In a general decoding algorithm of block turbo codes(BTCs), the weighting factor α and reliability factors β are fixed in each decoding iteration. However, for time-variant channels predefined α and β are not appropriate in BTC decoding. The thesis proposes a method to set the values of α and β dynamically based on input and output values of the decoder. BTC decoding algorithms use an iterative decoding procedure to achieve high bit error rate performance typically with eight half decoding iterations. However, the requirement of the number of decoding iteration

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30

Zheng, Yan-Xiu, and 鄭延修. "Inter-block permutation interleaver design for high throughput turbo codes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80119601906015718864.

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博士<br>國立交通大學<br>電信工程系所<br>96<br>With all its remarkable performance, the classic turbo code (TC) suffers from prolonged latency due to the relatively large iteration number and the lengthy interleaving delay required to ensure the desired error rate performance. We present a systematic approach that solves the dilemma between decoding latency and error rate performance. Our approach takes both algebraic and hardware constraints into account. From the algebraic point of view, we try to build large interleavers out of small interleavers. The structure of classic TC implies that we are constructi

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31

Lu, Pen Yao, and 呂本堯. "The Study of the Decoding Algorithms for Reed-Solomon Codes and Block Turbo Codes." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/75477674722052582492.

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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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Le, Nong. "A new distance-based algorithm for block turbo codes : from concept to implementation." Thesis, 2005. http://spectrum.library.concordia.ca/8469/1/MR10240.pdf.

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List-based algorithms for decoding Block Turbo Codes (BTC) have gained popularity due to their low computational complexity. The normal way to calculate the soft outputs involves searching for a decision code word D and a competing codeword B. In addition, a scaling factor {460} and an estimated reliability value β are used. In this thesis, we present a new approach that does not require {460} and β. Soft outputs are generated based on the Euclidean distance property of decision code words. More importantly, such algorithm has very low computational complexity and is very attractive for practi

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Huang, Kai Jie, and 黃楷傑. "An Improved Chase II Algorithm and the Application of Decoding Block Turbo Codes." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/70454072362999022385.

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碩士<br>長庚大學<br>電機工程學研究所<br>97<br>This paper proposes a low-complex Chase-2 decoding algorithm and the decoding of block turbo codes (BTCs). In addition, we study the trend of extrinsic information to promote the bit-error-rate (BER) performance of BTCs. Chase proposed Chase-2 algorithm to reduce decoding complexity of soft-decision decoding for linear block codes. According to channel measurements, we can find a set of candidate codewords. From the set, we select the minimum squared Euclidean distance codeword D as the optimum decision, which reduces the complexity of the soft-decision decoding

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Chen, Hui Cheng, and 陳惠禎. "A Reliability-Based Soft-input Soft-output Decoding Algorithm for Block Turbo Codes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/25225241013050853015.

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碩士<br>長庚大學<br>電機工程學系<br>98<br>Block turbo codes (BTCs) was proposed by Pyndiah in 1998 and it have be shown the performance of BTCs close to the Shannnon limit. In order to achieve a reasonable decoding complexity, generally the number of the least reliable bits is set four in most of decoding process. However, the soft outputs in some ambiguous sequences are unreliable that will cause causing the loss of BER. This thesis proposes a decoding algorithm for improving the performance of BTCs. The algorithm utilizes the average reliability to increase the number of the least reliable bits for th

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CHI, CHIA-HUNG, and 紀佳宏. "Study on Improving the Performance for Block Turbo Codes by Dynamically Estimating Weighting Factors Based on Mutual Information." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/d5775k.

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碩士<br>明志科技大學<br>電子工程系碩士班<br>102<br>In a general decoding algorithm of block turbo codes(BTCs), the weighting factor α and reliability factor β are fixed in each static decoding iteration with increasing times. It’s difficult to decode codes under poor channel environment. However, the time-variant channels predefined α and β are not appropriate in BTC decoding because they are not easily being controlled. The thesis proposes a method to set the values of α and β dynamically based on input and output values of the decoder. BTC decoding algorithms use an iterative decoding procedure to achiev

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Liao, Jimmy J. M., and 廖俊閔. "Design and Implementation of Block Turbo Code Codec." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/pnsada.

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碩士<br>國立交通大學<br>電子工程系所<br>96<br>In this thesis, a block turbo code of 802.16e is proposed. Unlike the conventional decoding algorithm requiring empirically derived parameters, the proposed geometric-like algorithm uses hamming distance to compensate the information. Not only improving the error performance, the proposed algorithm also facilitates hardware implementation. Moreover, a design methodology for parallel architecture is presented to meet various throughputs. The memory accessing hazard in parallel architecture can be overcome by the proposed multi-bank-array algorithm. The proposed a

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Vlok, Jacobus David. "Sparse graph codes on a multi-dimensional WCDMA platform." Diss., 2007. http://upetd.up.ac.za/thesis/available/etd-07042007-155428.

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Chen, Zhi-Feng, and 陳志峰. "Turbo Block Coded Modulation with Interblock Memory." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/7na8nm.

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碩士<br>中原大學<br>電機工程研究所<br>92<br>Turbo-codes are very powerful codes for power limited AWGN channels. The turbo-codes invented by Berrou et al. use two parallel-concatenated recursive systematic convolutional codes. The iterative decoding algorithm is good to operate at only a fraction of a dB from the Shannon limit. The discovery of turbo-codes does not put an end to the story of error control coding. On the contrary, it has resulted in a renaissance of coding research. By using the ‘turbo’ principle, many related codes have been discovering. The application of turbo-codes in bandwidth-efficien

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Ku, Hsien-Chun, and 顧賢俊. "An Architecture of Decoder for Reed-Solomon Block Turbo Code." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/82810967468479543019.

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碩士<br>中華大學<br>電機工程學系碩士班<br>98<br>In the last few years, error correcting codes have been investigated because of the rapid development of wireless communications. Reed-Solomon code is one of error correcting codes with a wide range of applications in digital communications and storage. Recently, block turbo codes using Reed-Solomon component codes have been investigated. This was motivated by the higher code rate property of Reed-Solomon codes and their efficiency for burst error correction. For the next generation wireless technologies, Reed-Solomon block turbo codes can offer a good trade-of

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Chang, Wang-Yueh, and 張汪鉞. "Design and Implementation of high-speed step-by-step Reed-Solomon Block Turbo Code Decoder." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/82203425220273650664.

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碩士<br>國立彰化師範大學<br>電信工程研究所<br>100<br>It is well known that the wireless communication technology has been developed towards broadband services. However, to keep the high quality and high throughput for wireless communication systems over wireless channel environment with noise and interferences is a real challenge. The forward error correction techniques can be employed to improve the performance and widely used in wireless communication systems. The concept of iterative decoding turbo code makes decoding performance close to the Shannon limit. Turbo code has established its future status in th

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Yin, Yizhi. "Le codage distribué pour un réseau de capteurs sans-fil basé sur les turbo codes en bloc." Phd thesis, 2012. http://tel.archives-ouvertes.fr/tel-00777396.

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Cette thèse étudie les performances d'un réseau de capteurs sans-fil coopératif, basé sur un codage réseau algébrique linéaire appliqué au relais. On considère un schéma coopératif basé sur le code produit en bloc où un grand nombre de sources transmettent des données indépendantes codées par un premier code en bloc vers un seul destinataire avec l'aide du relais. Dans ce schéma, le relais applique le codage réseau algébrique linéaire en utilisant un code correcteur d'erreur systématique linéaire en bloc sur les mots de code source détectés par le relais. Seule, la redondance générée par le re

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