Exploiting Diversity In Wireless Channels With Bit Interleaved Coded Modulation And Iterative Decoding Bicm Id

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

Bit-interleaved coded modulation with iterative decoding (BICM-ID) is considered for hybrid wireless channels that consist of parallel free space optical (FSO) and radio frequency (RF) links. Novel symbol mappers are proposed. In contrast to conventional symbol mappers that operate separately over the two links, the proposed mappers jointly optimize error performance over both the FSO and RF links. A greedy hybrid symbol assignment algorithm is presented to obtain mappings that are found to provide significantly better performance over conventional mapping. A technique to analyze the asymptotic bit error performance of the proposed hybrid symbol mapping is developed. Numerical results demonstrate the benefits of the hybrid symbol mappers over the conventional symbol mappers. Hybrid FSO/RF symbols that require multiple uses of the FSO channel for each use of the RF link to exploit the much higher bandwidth available with the FSO link are designed. An orthogonal evolutionary (OE) algorithm to obtain optimal symbol mappings is investigated. New cost functions to be used in the OE algorithm are proposed for different signal-to-noise ratio (SNR) regimes. Numerical results show that the proposed symbol mappings provide significant gain in term of SNR over the conventional mappings. In case of hybrid symbols that consist of 2 RF bits and 1 FSO bit, with a fixed FSO SNR of 3 dB, more than 6 dB gain in RF SNR is obtained over the conventional mappings. Similarly, for a fixed RF SNR of 2 dB, more than 8 dB gain in FSO SNR is obtained. The use of the proposed hybrid symbols in a relay network is investigated. Toward this goal, first an adaptive decode and forward (DF) cooperative diversity scheme based on BICM-ID for RF channels is investigated. Optimized constellation mappings for the source and the relay are designed. A genetic algorithm to find the optimized mapping is investigated. New error performance analysis for adaptive DF scheme using BICM-ID is proposed. Next, a quantize and encode forwarding (QEF) technique is developed where the soft information received at the relay is quantized and relayed to the destination. The relay-to-destination (RD) link can be a high bandwidth FSO link or a hybrid FSO/RF link. The use of the proposed symbol mappers in the RD link is studied for both FSO and hybrid FSO/RF links. Numerical results show that the use of a 3-bit quantizer at the relay provides a bit error rate (BER) performance close to a genie-aided maximal ratio combiner that directly combines information available at the relay and the destination. The use of BICM-ID with the proposed symbol mappers is also studied for quadrature amplitude modulation (QAM) symbols, and a significant performance gain over conventional symbol mappings is observed.

The coding for the wireless channel is the main topic of this Book. Mainly, single user transmission over one or more antennas is considered in the first part, where a novel multidimensional labeling with a designed interleaver which outperforms the two dimensional Bit Interleaved Coded Modulation with Iterative Decoding (BICM-ID) in the whole SNR region is presented. Modulation doping is used to compensate for the loss at the low SNR regions. The design is extended to the two transmit antennas case and a multidimensional constellation labeling for Bit Interleaved Space Time Coded Modulation with Iterative Decoding (BI-STCM-ID) is proposed . The transmission over two uncorrelated frequency bands and the construction of a simple 2 x 2 x 2 full-rate full-diversity space time frequency code based on constellation rotation is presented. In the second part the multi-user scenario from information theoretic point of view is briefly presented."

Presenting a thorough overview of bit-interleaved coded modulation (BICM), this book introduces the tools for the analysis and design of BICM transceivers. It explains in details the functioning principles of BICM and proposes a refined probabilistic modeling of the reliability metrics–the so-called L-values–which are at the core of the BICM receivers. Alternatives for transceiver design based on these models are then studied. Providing new insights into the analysis of BICM, this book is unique in its approach, providing a general framework for analysis and design, focusing on communication theoretic aspects of BICM transceivers. It adopts a tutorial approach, explains the problems in simple terms with the aid of multiple examples and case studies, and provides solutions using accessible mathematical tools. The book will be an excellent resource for researchers in academia and industry: graduate students, academics, development engineers, and R & D managers. Key Features: Presents an introduction to BICM, placing it in the context of other coded modulation schemes Offers explanations of the functioning principles and design alternatives Provides a unique approach, focusing on communication theory aspects Shows examples and case studies to illustrate analysis and design of BICM Adopts a tutorial approach, explaining the problems in simple terms and presenting solutions using accessible mathematical tools

Bit-Interleaved Coded Modulation is a comprehensive study of the subject, providing a comprehensive review of one of the most important coding schemes in modern communication systems.

The book discusses modern channel coding techniques for wireless communications such as turbo codes, low parity check codes (LDPC), space-time coding, Reed Solomon (RS) codes and convolutional codes. Many illustrative examples are included in each chapter for easy understanding of the coding techniques. The text is integrated with MATLAB-based programs to enhance the understanding of the subject’s underlying theories. It includes current topics of increasing importance such as turbo codes, LDPC codes, LT codes, Raptor codes and space-time coding in detail, in addition to the traditional codes such as cyclic codes, BCH and RS codes and convolutional codes. MIMO communications is a multiple antenna technology, which is an effective method for high-speed or high-reliability wireless communications. PC-based MATLAB m-files for the illustrative examples are included and also provided on the accompanying CD, which will help students and researchers involved in advanced and current concepts in coding theory. Channel coding, the core of digital communication and data storage, has undergone a major revolution as a result of the rapid growth of mobile and wireless communications. The book is divided into 11 chapters. Assuming no prior knowledge in the field of channel coding, the opening chapters (1 - 2) begin with basic theory and discuss how to improve the performance of wireless communication channels using channel coding. Chapters 3 and 4 introduce Galois fields and present detailed coverage of BCH codes and Reed-Solomon codes. Chapters 5–7 introduce the family of convolutional codes, hard and soft-decision Viterbi algorithms, turbo codes, BCJR algorithm for turbo decoding and studies trellis coded modulation (TCM), turbo trellis coded modulation (TTCM), bit-interleaved coded modulation (BICM) as well as iterative BICM (BICM-ID) and compares them under various channel conditions. Chapters 8 and 9 focus on low-density parity-check (LDPC) codes, LT codes and Raptor codes. Chapters 10 and 11 discuss MIMO systems and space-time (ST) coding.

Accessible introduction to the theoretical foundations of modern coding theory Including numerous applications to wireless transmission systems The author is famous in the field of coding and wireless communications for his work in the area of faded channels & communcations.