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Recent developments such as the invention of powerful turbo-decoding and irregular designs, together with the increase in the number of potential applications to multimedia signal compression, have increased the importance of variable length coding (VLC). Providing insights into the very latest research, the authors examine the design of diverse near-capacity VLC codes in the context of wireless telecommunications.The book commences with an introduction to Information Theory, followed by a discussion of Regular as well as Irregular Variable Length Coding and their applications in joint source and channel coding. Near-capacity designs are created using Extrinsic Information Transfer (EXIT) chart analysis. The latest techniques are discussed, outlining radical concepts such as Genetic Algorithm (GA) aided construction of diverse VLC codes. The book concludes with two chapters on VLC-based space-time transceivers as well as on frequency-hopping assisted schemes, followed by suggestions for future work on the topic.. Surveys the historic evolution and development of VLCs. Discusses the very latest research into VLC codes. Introduces the novel concept of Irregular VLCs and their application in joint-source and channel coding.

Coding theory. --- Coding theory --- Electrical & Computer Engineering --- Engineering & Applied Sciences --- Telecommunications --- Telecommunication. --- Electric communication --- Mass communication --- Telecom --- Telecommunication industry --- Communication --- Information theory --- Telecommuting --- Data compression (Telecommunication) --- Digital electronics --- Machine theory --- Signal theory (Telecommunication) --- Computer programming

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OFDM systems have experienced increased attention in recent years and have found applications in a number of diverse areas including telephone-line based ADSL links, digital audio and video broadcasting systems, and wireless local area networks. OFDM is being considered for the next-generation of wireless systems both with and without direct sequence spreading and the resultant spreading-based multi-carrier CDMA systems have numerous attractive properties.This volume provides the reader with a broad overview of the research on OFDM systems during their 40-year history.Part I commences with an easy to read conceptual, rather than mathematical, treatment of the basic design issues of OFDM systems. The discussions gradually deepen to include adaptive single and multi-user OFDM systems invoking adaptive turbo coding.Part II introduces the taxonomy of multi-carrier CDMA systems and deals with the design of their spreading codes and the objective of minimising their crest factors.This part also compares the benefits of adaptive modulation and space-time coding with the conclusion that in conjunction with multiple transmitters and receivers the advantages of adaptive modulation gradually erode both in OFDM and MC-CDMA systems.Part III addresses a host of advanced channel estimation and multi-user detection problems in the context of Space Division Multiple Access (SDMA) systems.Aimed at the mathematically advanced reader, this part provides a range of implementation-ready solutions, performance results and future research issues.Researchers, advanced students and practising engineers working in wireless communications will all find this valuable text illuminating and informative.

Wireless communication systems. --- Wireless LANs. --- Orthogonal frequency division multiplexing. --- Code division multiple access. --- Orthogonalization methods.

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This comprehensive all-in-one reference work covers the fundamental physical aspects of mobile communications and explains the latest techniques employed in second and third generation digital cellular mobile radio systems. Mobile radio communications technology has progressed rapidly and it is now capable of the transmission of voice, data and image signals. This new edition reflects the current state-of-the-art by featuring: * Expanded and updated sections on voice compression techniques, interleaving and channel coding methods, quaternary frequency shift keying, continuous phase modulation methods, Viterbi equalisation and slow frequency hopping as well as extended coverage of the GSM system. * Three new chapters on wireless multimedia, third generation systems and on WATM respectively As in the first edition, this latest volume continues to cover important topics such as radio propagation, multiple access methods and, on a higher level, cordless telecommunications and teletraffic issues. This book will prove invaluable to mobile communication engineers, designers, researchers, and students in the design, operation and research of second and third generation systems and wireless LANs.

Wireless communication systems --- Cell phone systems --- Global system for mobile communications --- Electrical & Computer Engineering --- Telecommunications --- Engineering & Applied Sciences

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Since the standardisation of 3G systems significant advances have been made in the field of CDMA systems. The next generation of wireless systems is expected to support a wide variety of multirate services, while achieving an increased spectral efficiency, a high bit rate and satisfying a range of many other demanding specifications.This all-in-one volume reports on the entire body of recent advances in both single- and multi-carrier DS-CDMA as follows:. Presents a future-proof system design framework providing backwards compatibility with legacy systems. Features multiuser detection and interference cancellation, spanning the range of classic and avant-garde CDMA solutions, including genetic algorithm aided systems for blind data and channel estimation. Covers burst-by-burst adaptive CDMA and blind per-survivor aided CDMA. Details the entire body of joint coding and modulation aided CDMA, as well as adaptive space-time spreading. Explains both classic and radically new coded M-ary CDMA. Includes the body of knowledge on time-frequency spreading aided multicarrier DS-CDMA and code acquisition. Describes the existing 3G standards and cross-layer optimization aided adaptive modulation as well as beamforming assisted FDD/TDD networkingSuch a comprehensive treatment of the subject will have wide-ranging appeal to researchers, advanced students and practising engineers working in wireless communications.

Code division multiple access --- Multiuser detection (Telecommunication) --- Signal processing --- Telecommunications --- Electrical & Computer Engineering --- Engineering & Applied Sciences --- Digital techniques --- Code division multiple access. --- Digital techniques.

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Motivated by the rapid evolution of the consecutive generations of wireless communication systems this volume continues to provide an overview of the majority of single- and multi-carrier QAM techniques.Now fully revised and updated, with more than 300 pages of new material, this new edition presents the wide range of recent developments in the field and places particular emphasis on the family of coded modulation aided OFDM and CDMA schemes. In addition, it also includes a fully revised chapter on adaptive modulation and a new chapter characterizing the design trade-offs of adaptive modulation and space-time coding.Divided into four parts:Part I: commences with a historical perspective and classic schemes for the uninitiatedPart II: offers a deep discourse on adaptive QAM arrangements that have found their way also into the 3G system's High Speed Data Packet Access (HSDPA) modePart III: details the advanced intricacies of adaptive versus space-time block- and trellis-coded OFDM and MC-CDMAPart IV: contains previously unpublished new research results. It commences with a theoretical chapter on the capacity of wireless channels. The discussions then continue by contriving sophisticated iterative coded modulation systems, such as TCM, TTCM, BICM, BICM-ID designed for turbo-detected QAM-based space-time coded OFDM and CDMA systems operating over wireless channelsIn summary, this volume amalgamates a comprehensive textbook with a deep research monograph on the topic of QAM, ensuring it has a wide-ranging appeal for both senior undergraduate and postgraduate students as well as practicing engineers and researchers.

Signal processing --- Amplitude modulation --- Electrical & Computer Engineering --- Engineering & Applied Sciences --- Telecommunications --- Digital techniques --- Amplitude modulation. --- Digital techniques.