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

Lajos Hanzo University of Southampton, UK
Lajos Hanzo has held various research and academic posts in Hungary, Germany and the UK. Since 1986 he has been with the School of Electronics and Computer Science, University of Southampton, UK and has been a consultant to Multiple Access Communications Ltd., UK. He currently holds the established Chair of Telecommunications. He co-authored 17 Wiley/IEEE Press books on mobile radio communications and published in excess of 800 research papers.

Robert G. Maunder, University of Southampton, UK
Robert G. Maunder has studied with the School of Electronics and Computer Science, University of Southampton, UK, since October 2000. His research interests include video coding, joint source/channel coding and iterative decoding. In 2007 he was appointed a lecturer in the School of ECS, Univ. of Southampton.

Jin Wang, Aeroflex, UK
Jin Wang recently joined Aeroflex, Cambridge, UK. His research interests include video coding, channel coding, joint source/channel coding, and iterative detection and decoding for digital communication systems. He published numerous IEEE journal and conference papers on related topics.

Lie-Liang Yang, University of Southampton, UK
Lie-Liang Yang works in the School of Electronics and Computer Science, University of Southampton, UK, and currently holds the academic post of Readership. Dr. Yang's research has covered a wide range of topics in wireless communications, networking and signal processing. He has published over 200 research papers in journals and conference proceedings, authored/co-authored two books and also published several book chapters.

About the Authors

Other Wiley and IEEE Press Books on Related Topics

Acknowledgments

Preface

Chapter 1 Introduction

1.1 Historical Overview

1.2 Applications of Irregular Variable Length Coding

1.3 Motivation and Methodology

1.4 Outline of the Book

1.5 Novel Contributions of the Book

Chapter 2 Information Theory Basics

2.1 Issues in Information Theory

2.2 AdditiveWhite Gaussian Noise Channel

2.3 Information of a Source

2.4 Average Information of Discrete Memoryless Sources

2.5 Source Coding for a Discrete Memoryless Source

2.6 Entropy of Discrete Sources Exhibiting Memory

2.7 Examples

2.8 Generating Model Sources

2.9 Run-Length Coding for Discrete Sources Exhibiting Memory

2.10 Information Transmission via Discrete Channels

2.11 Capacity of Discrete Channels

2.12 Shannon's Channel Coding Theorem

2.13 Capacity of Continuous Channels

2.14 Shannon's Message for Wireless Channels

2.15 Summary and Conclusions

I Regular Concatenated Codes and Their Design

List of Symbols in Part I

Chapter 3 Sources and Source Codes

3.1 Introduction

3.2 Source Models

3.3 Source Codes

3.4 Soft-Decoding of Variable Length Codes

3.5 Summary and Conclusions

Chapter 4 Iterative Source/Channel Decoding

4.1 Concatenated Coding and the Turbo Principle

4.2 SISO APP Decoders and Their EXIT Characteristics

4.3 Iterative Source/Channel Decoding Over AWGN Channels

4.4 Iterative Channel Equalisation, Channel Decoding and Source Decoding

4.5 Summary and Conclusions

Chapter 5 Three-Stage Serially Concatenated Turbo Equalisation

5.1 Introduction

5.2 Soft-in/Soft-outMMSE Equalisation

5.3 Turbo Equalisation Using MAP/MMSE Equalisers

5.4 Three-stage serially concatenated coding and MMSE equalisation

5.5 Approaching the Channel Capacity Using EXIT-Chart Matching and IRCCs .

5.6 Rate-Optimisation of Serially Concatenated Codes

5.7 Joint Source-Channel Turbo Equalisation Revisited

5.8 Summary and Conclusions

II Irregular Concatenated VLCs and Their Design

List of Symbols in Part II

Chapter 6 Irregular Variable Length Codes for Joint Source and Channel Coding

6.1 Introduction

6.2 Overview of proposed scheme

6.3 Transmission frame structure

6.4 VDVQ/RVLC encoding

6.5 APP SISO VDVQ/RVLC decoding

6.6 Simulation results

6.7 Summary and Conclusions

Chapter 7 Irregular Variable Length Codes for EXIT Chart Matching

7.1 Introduction

7.2 Overview of proposed schemes

7.3 Parameter design for the proposed schemes

7.4 Simulation results

7.5 Summary and Conclusions

Chapter 8 Genetic Algorithm Aided Design of Irregular Variable Length Coding Components

8.1 Introduction

8.2 The free distance metric

8.3 Overview of the proposed genetic algorithm

8.4 Overview of proposed scheme

8.5 Parameter design for the proposed scheme

8.6 Simulation results

8.7 Summary and Conclusions

Chapter 9 Joint EXIT Chart Matching of Irregular Variable Length Coding and Irregular

Unity Rate Coding

9.1 Introduction

9.2 Modifications of the EXIT chart matching algorithm

9.3 Joint EXIT chart matching

9.4 Overview of the transmission scheme considered

9.5 System parameter design

9.6 Simulation results

9.7 Summary and Conclusions

III Applications of VLCs

Chapter 10 Iteratively Decoded VLC Space-Time Coded Modulation

10.1 Introduction

10.2 Space Time Coding Overview

10.3 Two-Dimensional VLC Design

10.4 VL-STCM Scheme

10.5 VL-STCM-ID Scheme

10.6 Convergence Analysis

10.7 Simulation results

10.8 Conclusions

Chapter 11 Iterative Detection of Three-Stage Concatenated IrVLC FFH-MFSK

11.1 Introduction

11.2 System Overview

11.3 Iterative decoding

11.4 System parameter design and Results

11.5 Conclusion

Chapter 12 Conclusions and Future Research

12.1 Chapter 1: Introduction

12.2 Chapter 2: Information Theory Basics

12.3 Chapter 3: Sources and Source Codes

12.4 Chapter 4: Iterative Source/Channel Decoding

12.5 Chapter 5: Three-Stage Serially Concatenated Turbo Equalisation

12.6 Chapter 6: Joint source and channel coding

12.7 Chapters 7 - 9: EXIT chart matching

12.8 Chapter 8: GA-aided Design of Irregular VLC Components

12.9 Chapter 9: Joint EXIT Chart Matching of IRVLCs and IRURCs

12.10Chapter 10: Iteratively Decoded VLC Space-Time Coded Modulation

12.11Chapter 11: Iterative Detection of Three-Stage Concatenated IrVLC FFHMFSK

12.12Future work

12.13Closing remarks

Appendix A VLC Construction Algorithms

A.1 RVLC Construction Algorithm A

A.2 RVLC Construction Algorithm B

A.3 Greedy Algorithm (GA) and Majority Voting Algorithm (MVA)

Appendix B SISO VLC Decoder

Appendix C APP Channel Equalisation

Bibliography

Glossary

Subject Index

Author Index