Efficient Computation Of Viterbi Decoder Reliability With An Application To Variable Length Coding

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Efficient Computation of Viterbi Decoder Reliability with an Application to Variable-Length Coding

Author : Alexander Makoto Baldauf
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)

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Book Synopsis Efficient Computation of Viterbi Decoder Reliability with an Application to Variable-Length Coding by : Alexander Makoto Baldauf

Download or read book Efficient Computation of Viterbi Decoder Reliability with an Application to Variable-Length Coding written by Alexander Makoto Baldauf and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis compares the accuracy and complexity of Raghavan and Baum's Reliability Out-put Viterbi Algorithm (ROVA), Polyanskiy's accumulated information density (AID), and Fricke and Hoeher's approximation of ROVA. It turns out that AID is far less accurate than ROVA in practice. This thesis proposes codeword information density (CID), which modifies AID to improve its accuracy and leads to a lower-complexity implementation of ROVA. This thesis includes an analytical expression for the random variable describing the correct decoding probability computed by ROVA and uses this expression to characterize how the probabilities of correct decoding, undetected error, and negative acknowledgement behave as a function of the selected threshold for reliable decoding. This thesis examines both the complexity and the simulation time of ROVA, CID, AID, and the Fricke and Hoe- her approximation to ROVA. This thesis also derives an expression for the union bound on the frame error rate for zero-terminated trellis codes with punctured symbols and uses it to optimize the order of symbol transmission in an incremental retransmission scheme. This thesis compares the performance of an incremental retransmission scheme using ROVA as a stopping condition to one that uses a CRC as a stopping condition. This thesis concludes by applying the sequential differential optimization algorithm (SDO) to determine the trans- mission lengths in an incremental transmission scheme to maximize the throughput when limiting the maximum number of transmissions.

Reliability-output Decoding and Low-latency Variable-length Coding Schemes for Communication with Feedback

Author : Adam Royce Williamson
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Reliability-output Decoding and Low-latency Variable-length Coding Schemes for Communication with Feedback by : Adam Royce Williamson

Download or read book Reliability-output Decoding and Low-latency Variable-length Coding Schemes for Communication with Feedback written by Adam Royce Williamson and published by . This book was released on 2014 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feedback links are ubiquitous in modern communication systems. This dissertation is focused on the short-blocklength performance of coded communication systems with feedback and is organized in three main parts. The first section presents a novel reliability-output decoding algorithm for tail-biting convolutional codes, based on Raghavan and Baum's Reliability-Output Viterbi Algorithm (ROVA) for terminated convolutional codes. Whereas terminated convolutional codes suffer from a rate penalty at short blocklengths, tail-biting convolutional codes do not suffer from rate loss, making them throughput-efficient and suitable for used in reliability-based retransmission schemes with short blocklengths. The second portion of the dissertation analyzes the performance of deterministic variable-length feedback coding schemes, focusing on blocklengths less than 300 symbols. In both the decision-feedback and information-feedback settings, we demonstrate that tail-biting convolutional codes can deliver rates surpassing the random-coding lower bound at blocklengths less than 100 symbols. The decision-feedback scheme uses the tail-biting ROVA to determine when to stop transmission, which requires only a single bit of feedback (ACK/NACK) after each decoding attempt. In contrast, the information-feedback scheme employs two-phase incremental redundancy and uses feedback of the received symbols to confirm or reject the decoder's tentative estimate. Finally, we discuss implications of these schemes when used in practical systems, namely the performance when decoding is limited to packets instead of individual symbols. Finally, using the information-theoretic framework of the second section, the third part of this dissertation investigates the energy efficiency of variable-length feedback codes compared to that of fixed-length block codes without feedback. While the latency reduction obtained with feedback can decrease transmitter power consumption, attempting decoding after every received symbol significantly increases receiver power consumption. Care must be taken to choose decoding intervals that balance the competing interests of transmitter and receiver power.

Joint Source-Channel Decoding

Author : Pierre Duhamel
Publisher : Academic Press
ISBN 13 : 0080922449
Total Pages : 337 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Joint Source-Channel Decoding by : Pierre Duhamel

Download or read book Joint Source-Channel Decoding written by Pierre Duhamel and published by Academic Press. This book was released on 2009-11-26 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: - Treats joint source and channel decoding in an integrated way - Gives a clear description of the problems in the field together with the mathematical tools for their solution - Contains many detailed examples useful for practical applications of the theory to video broadcasting over mobile and wireless networks Traditionally, cross-layer and joint source-channel coding were seen as incompatible with classically structured networks but recent advances in theory changed this situation. Joint source-channel decoding is now seen as a viable alternative to separate decoding of source and channel codes, if the protocol layers are taken into account. A joint source/protocol/channel approach is thus addressed in this book: all levels of the protocol stack are considered, showing how the information in each layer influences the others. This book provides the tools to show how cross-layer and joint source-channel coding and decoding are now compatible with present-day mobile and wireless networks, with a particular application to the key area of video transmission to mobiles. Typical applications are broadcasting, or point-to-point delivery of multimedia contents, which are very timely in the context of the current development of mobile services such as audio (MPEG4 AAC) or video (H263, H264) transmission using recent wireless transmission standards (DVH-H, DVB-SH, WiMAX, LTE). This cross-disciplinary book is ideal for graduate students, researchers, and more generally professionals working either in signal processing for communications or in networking applications, interested in reliable multimedia transmission. This book is also of interest to people involved in cross-layer optimization of mobile networks. Its content may provide them with other points of view on their optimization problem, enlarging the set of tools which they could use. Pierre Duhamel is director of research at CNRS/ LSS and has previously held research positions at Thomson-CSF, CNET, and ENST, where he was head of the Signal and Image Processing Department. He has served as chairman of the DSP committee and associate Editor of the IEEE Transactions on Signal Processing and Signal Processing Letters, as well as acting as a co-chair at MMSP and ICASSP conferences. He was awarded the Grand Prix France Telecom by the French Science Academy in 2000. He is co-author of more than 80 papers in international journals, 250 conference proceedings, and 28 patents. Michel Kieffer is an assistant professor in signal processing for communications at the Université Paris-Sud and a researcher at the Laboratoire des Signaux et Systèmes, Gif-sur-Yvette, France. His research interests are in joint source-channel coding and decoding techniques for the reliable transmission of multimedia contents. He serves as associate editor of Signal Processing (Elsevier). He is co-author of more than 90 contributions to journals, conference proceedings, and book chapters. - Treats joint source and channel decoding in an integrated way - Gives a clear description of the problems in the field together with the mathematical tools for their solution - Contains many detailed examples useful for practical applications of the theory to video broadcasting over mobile and wireless networks

Communications and Cryptography

Author : Richard E. Blahut
Publisher : Springer Science & Business Media
ISBN 13 : 1461526949
Total Pages : 473 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Communications and Cryptography by : Richard E. Blahut

Download or read book Communications and Cryptography written by Richard E. Blahut and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information theory is an exceptional field in many ways. Technically, it is one of the rare fields in which mathematical results and insights have led directly to significant engineering payoffs. Professionally, it is a field that has sustained a remarkable degree of community, collegiality and high standards. James L. Massey, whose work in the field is honored here, embodies the highest standards of the profession in his own career. The book covers the latest work on: block coding, convolutional coding, cryptography, and information theory. The 44 contributions represent a cross-section of the world's leading scholars, scientists and researchers in information theory and communication. The book is rounded off with an index and a bibliography of publications by James Massey.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 818 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Performance of a Variable-Constraint-Length Viterbi Decoding Algorithm

Author : J. K. Tamaki
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Performance of a Variable-Constraint-Length Viterbi Decoding Algorithm by : J. K. Tamaki

Download or read book Performance of a Variable-Constraint-Length Viterbi Decoding Algorithm written by J. K. Tamaki and published by . This book was released on 1982 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Document demonstrates that the computational complexity of the Viterbi decoding algorithm can be reduced for Maximum Likelihood Sequence Estimation on time variant, fading channels when the channel constraint length is reduced. An algorithm is developed that reduces the computational complexity of the Viterbi decoding algorithm. For time-variant, fading channels, the effective constraint length may expand or contract, and it is shown that we can expand or contract the state trellis diagram of the Viterbi algorithm accordingly. The derived algorithm requires knowledge of the channel's intersymbol interference patterns. These results apply not only to the hf channel, but to any channel characterized by convolutional encoding. In addition, channels that demonstrate catastrophic behavior are found and discussed.

Trellis and Turbo Coding

Author : Christian B. Schlegel
Publisher : John Wiley & Sons
ISBN 13 : 0471667838
Total Pages : 403 pages
Book Rating : 4.4/5 (716 download)

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Book Synopsis Trellis and Turbo Coding by : Christian B. Schlegel

Download or read book Trellis and Turbo Coding written by Christian B. Schlegel and published by John Wiley & Sons. This book was released on 2004-09-07 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trellis and turbo coding are used to compress and clean communications signals to allow greater bandwidth and clarity Presents the basics, theory, and applications of these techniques with a focus on potential standard state-of-the art methods in the future Provides a classic basis for anyone who works in the area of digital communications A Wiley-IEEE Press Publication

Trellises and Trellis-Based Decoding Algorithms for Linear Block Codes

Author : Shu Lin
Publisher : Springer Science & Business Media
ISBN 13 : 1461557453
Total Pages : 290 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Trellises and Trellis-Based Decoding Algorithms for Linear Block Codes by : Shu Lin

Download or read book Trellises and Trellis-Based Decoding Algorithms for Linear Block Codes written by Shu Lin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the demand for data reliability increases, coding for error control becomes increasingly important in data transmission systems and has become an integral part of almost all data communication system designs. In recent years, various trellis-based soft-decoding algorithms for linear block codes have been devised. New ideas developed in the study of trellis structure of block codes can be used for improving decoding and analyzing the trellis complexity of convolutional codes. These recent developments provide practicing communication engineers with more choices when designing error control systems. Trellises and Trellis-based Decoding Algorithms for Linear Block Codes combines trellises and trellis-based decoding algorithms for linear codes together in a simple and unified form. The approach is to explain the material in an easily understood manner with minimal mathematical rigor. Trellises and Trellis-based Decoding Algorithms for Linear Block Codes is intended for practicing communication engineers who want to have a fast grasp and understanding of the subject. Only material considered essential and useful for practical applications is included. This book can also be used as a text for advanced courses on the subject.

Information Theory and Coding - Solved Problems

Author : Predrag Ivaniš
Publisher : Springer
ISBN 13 : 3319493701
Total Pages : 517 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis Information Theory and Coding - Solved Problems by : Predrag Ivaniš

Download or read book Information Theory and Coding - Solved Problems written by Predrag Ivaniš and published by Springer. This book was released on 2016-11-29 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is offers a comprehensive overview of information theory and error control coding, using a different approach then in existed literature. The chapters are organized according to the Shannon system model, where one block affects the others. A relatively brief theoretical introduction is provided at the beginning of every chapter, including a few additional examples and explanations, but without any proofs. And a short overview of some aspects of abstract algebra is given at the end of the corresponding chapters. The characteristic complex examples with a lot of illustrations and tables are chosen to provide detailed insights into the nature of the problem. Some limiting cases are presented to illustrate the connections with the theoretical bounds. The numerical values are carefully selected to provide in-depth explanations of the described algorithms. Although the examples in the different chapters can be considered separately, they are mutually connected and the conclusions for one considered problem relate to the others in the book.

Journal of Southeast University

Author :
Publisher :
ISBN 13 :
Total Pages : 420 pages
Book Rating : 4.6/5 (243 download)

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Book Synopsis Journal of Southeast University by :

Download or read book Journal of Southeast University written by and published by . This book was released on 2002 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Trellis Coding

Author : Christian B. Schlegel
Publisher : Wiley-IEEE Press
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Trellis Coding by : Christian B. Schlegel

Download or read book Trellis Coding written by Christian B. Schlegel and published by Wiley-IEEE Press. This book was released on 1997 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most important features, results and techniques of trellis coding which have appeared in the literature over the past 15 years. It is a summary as well as a basis for anyone involved in trellis coding applications or research. Engineers, communications specialists, telecommunications experts, scientists, mathematicians and students will find this book an invaluable resource.

NEC Research & Development

Author :
Publisher :
ISBN 13 :
Total Pages : 1242 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis NEC Research & Development by :

Download or read book NEC Research & Development written by and published by . This book was released on 1988 with total page 1242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wireless Communications Systems Architecture

Author : Khaled Salah Mohamed
Publisher : Springer Nature
ISBN 13 : 3031192974
Total Pages : 192 pages
Book Rating : 4.0/5 (311 download)

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Book Synopsis Wireless Communications Systems Architecture by : Khaled Salah Mohamed

Download or read book Wireless Communications Systems Architecture written by Khaled Salah Mohamed and published by Springer Nature. This book was released on 2022-10-31 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses wireless communication systems from a transceiver and digital signal processing perspective. It is intended to be an advanced and thorough overview for key wireless communication technologies. A wide variety of wireless communication technologies, communication paradigms and architectures are addressed, along with state-of-the-art wireless communication standards. The author takes a practical, systems-level approach, breaking up the technical components of a wireless communication system, such as compression, encryption, channel coding, and modulation. This book combines hardware principles with practical communication system design. It provides a comprehensive perspective on emerging 5G mobile networks, explaining its architecture and key enabling technologies, such as M-MIMO, Beamforming, mmWaves, machine learning, and network slicing. Finally, the author explores the evolution of wireless mobile networks over the next ten years towards 5G and beyond (6G), including use-cases, system requirements, challenges and opportunities.

Fundamentals of Convolutional Coding

Author : Rolf Johannesson
Publisher : John Wiley & Sons
ISBN 13 : 1119098750
Total Pages : 550 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Fundamentals of Convolutional Coding by : Rolf Johannesson

Download or read book Fundamentals of Convolutional Coding written by Rolf Johannesson and published by John Wiley & Sons. This book was released on 2015-05-19 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Convolutional Coding, Second Edition, regarded as a bible of convolutional coding brings you a clear and comprehensive discussion of the basic principles of this field Two new chapters on low-density parity-check (LDPC) convolutional codes and iterative coding Viterbi, BCJR, BEAST, list, and sequential decoding of convolutional codes Distance properties of convolutional codes Includes a downloadable solutions manual

Science Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 1360 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Science Abstracts by :

Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Inventive Communication and Computational Technologies

Author : G. Ranganathan
Publisher : Springer Nature
ISBN 13 : 9811501467
Total Pages : 1391 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Inventive Communication and Computational Technologies by : G. Ranganathan

Download or read book Inventive Communication and Computational Technologies written by G. Ranganathan and published by Springer Nature. This book was released on 2020-01-29 with total page 1391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected papers presented at the Inventive Communication and Computational Technologies conference (ICICCT 2019), held on 29–30 April 2019 at Gnanamani College of Technology, Tamil Nadu, India. The respective contributions highlight recent research efforts and advances in a new paradigm called ISMAC (IoT in Social, Mobile, Analytics and Cloud contexts). Topics covered include the Internet of Things, Social Networks, Mobile Communications, Big Data Analytics, Bio-inspired Computing and Cloud Computing. The book is chiefly intended for academics and practitioners working to resolve practical issues in this area.

Turbo Coding, Turbo Equalisation and Space-Time Coding

Author : Lajos Hanzo
Publisher : John Wiley & Sons
ISBN 13 : 0470978333
Total Pages : 839 pages
Book Rating : 4.4/5 (79 download)

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Book Synopsis Turbo Coding, Turbo Equalisation and Space-Time Coding by : Lajos Hanzo

Download or read book Turbo Coding, Turbo Equalisation and Space-Time Coding written by Lajos Hanzo and published by John Wiley & Sons. This book was released on 2011-05-03 with total page 839 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the full range of channel codes from the most conventional through to the most advanced, the second edition of Turbo Coding, Turbo Equalisation and Space-Time Coding is a self-contained reference on channel coding for wireless channels. The book commences with a historical perspective on the topic, which leads to two basic component codes, convolutional and block codes. It then moves on to turbo codes which exploit iterative decoding by using algorithms, such as the Maximum-A-Posteriori (MAP), Log-MAP and Soft Output Viterbi Algorithm (SOVA), comparing their performance. It also compares Trellis Coded Modulation (TCM), Turbo Trellis Coded Modulation (TTCM), Bit-Interleaved Coded Modulation (BICM) and Iterative BICM (BICM-ID) under various channel conditions. The horizon of the content is then extended to incorporate topics which have found their way into diverse standard systems. These include space-time block and trellis codes, as well as other Multiple-Input Multiple-Output (MIMO) schemes and near-instantaneously Adaptive Quadrature Amplitude Modulation (AQAM). The book also elaborates on turbo equalisation by providing a detailed portrayal of recent advances in partial response modulation schemes using diverse channel codes. A radically new aspect for this second edition is the discussion of multi-level coding and sphere-packing schemes, Extrinsic Information Transfer (EXIT) charts, as well as an introduction to the family of Generalized Low Density Parity Check codes. This new edition includes recent advances in near-capacity turbo-transceivers as well as new sections on multi-level coding schemes and of Generalized Low Density Parity Check codes Comparatively studies diverse channel coded and turbo detected systems to give all-inclusive information for researchers, engineers and students Details EXIT-chart based irregular transceiver designs Uses rich performance comparisons as well as diverse near-capacity design examples