OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting

  • 19h 29m
  • B.J. Choi, L. Hanzo, M. Münster, T. Keller
  • John Wiley & Sons (US)
  • 2003

Orthogonal frequency-division multiplexing (OFDM) is a method of digital modulation in which a signal is split into several narrowband channels at different frequencies.

CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimising the use of available bandwidth. Multiplexing is sending multiple signals or streams of information on a carrier at the same time in the form of a single, complex signal and then recovering the separate signals at the receiving end.

Multi-Carrier (MC) CDMA is a combined technique of Direct Sequence (DS) CDMA (Code Division Multiple Access) and OFDM techniques. It applies spreading sequences in the frequency domain.

Wireless communications has witnessed a tremendous growth during the past decade and further spectacular enabling technology advances are expected in an effort to render ubiquitous wireless connectivity a reality.

This technical in-depth book is unique in its detailed exposure of OFDM, MIMO-OFDM and MC-CDMA. A further attraction of the joint treatment of these topics is that it allows the reader to view their design trade-offs in a comparative context.

Divided into three main parts:

  • Part I provides a detailed exposure of OFDM designed for employment in various applications
  • Part II is another design alternative applicable in the context of OFDM systems where the channel quality fluctuations observed are averaged out with the aid of frequency-domain spreading codes, which leads to the concept of MC-CDMA
  • Part III discusses how to employ multiple antennas at the base station for the sake of supporting multiple users in the uplink
  • Portrays the entire body of knowledge currently available on OFDM
  • Provides the first complete treatment of OFDM, MIMO(Multiple Input Multiple Output)-OFDM and MC-CDMA
  • Considers the benefits of channel coding and space time coding in the context of various application examples and features numerous complete system design examples
  • Converts the lessons of Shannon’s information theory into design principles applicable to practical wireless systems
  • Combines the benefits of a textbook with a research monograph where the depth of discussions progressively increase throughout the book

This all-encompassing self-contained treatment will appeal to researchers, postgraduate students and academics, practising research and development engineers working for wireless communications and computer networking companies and senior undergraduate students and technical managers.

About the Authors

Lajos Hanzo received his degree in electronics in 1976 and his doctorate in 1983. During his career in telecommunications he has held various research and academic posts in Hungary, Germany and the UK. Since 1986 he has been with the Department of Electronics and Computer Science, University of Southampton, UK, where he holds the chair in telecommunications. He co-authored 10 books totalling 8000 pages on mobile radio communications, published about 450 research papers, organised and chaired conference sessions, presented overview lectures and has been awarded a number of distinctions. Currently he heads an academic research team, working on a range of research projects in the field of wireless multimedia communications sponsored by industry, the Engineering and Physical Sciences Research Council (EPSRC) UK, the European IST Programme and the Mobile Virtual Centre of Excellence (VCE), UK. He is an enthusiastic supporter of industrial and academic liaison and he offers a range of industrial courses. Lajos is also an IEEE Distinguished Lecturer of both the Communications as well as the Vehicular Technology Society and a Fellow of the IEE.

Matthias Münster was awared the Dipl. Ing. degree by the RWTH Aachen, Germany and after graduation he embarked on postgraduate research at the University of Southampton, where he completed his PhD in mobile communications on 2002. His areas of interest include adaptive multiuser OFDM transmission, wideband channel estimation, multiuser detection and a range of related signal processing aspects. During his PhD research he contributed over a dozen various research papers and following the completion of his thesis he returned to his native Germany, where he is currently involved in the development of sophisticated signal processing algorithms.

Byoung-Jo Choi received his BSc and MSc degrees in Electrical Engineering from KAIST, Korea, in 1990 and 1992, respectively. He has been working for LG Electronics, Korea, since January 1992, where he was involved in developing the KoreaSat monitoring system, Digital DBS transmission system and W-CDMA based Wireless Local Loop (WLL) system. He was awarded the PhD degree in Mobile Communications at the University of Southampton, UK, where he was a postdoctoral research assistant from 2001 to 2002. He is a recipient of the British Chevening Scholarship awarded by the British Council, UK. His current research interests are related to mobile communication systems design with emphasis on adaptive modulation aided OFDM, MC-CDMA and W-CDMA.

Thomas Keller studied Electrical Engineering at the University of Karlsruhe, Ecole Superieure d'Ingenieurs en Electronique et Electrotechnique, Paris, and the University of Southampton. He graduated with a Dipl.-Ing. degree in 1995. Between 1995 and 1999 he had been with the Wireless Multimedia Communications Group at the University of Southampton, where he completed his PhD in mobile communications. His areas of interest include adaptive OFDM transmission, wideband channel estimation, CDMA and error correction coding. He recently joined Ubinetics, Cambridge, UK, where he is involved in the research and development of third-genertion wireless systems. Dr. Keller co-authored two monographs and about 30 various research papers.

In this Book

  • Introduction
  • Introduction to Orthogonal Frequency Division Multiplexing
  • OFDM Transmission Over Gaussian Channels
  • OFDM Transmission Over Wideband Channels
  • OFDM Time and Frequency Domain Synchronisation
  • Adaptive Single- and Multi-user OFDM Techniques
  • Block-Coded Adaptive OFDM
  • OFDM versus MC-CDMA
  • Basic Spreading Sequences
  • MC-CDMA Performance in Synchronous Environments
  • Advanced Peak Factor Reduction Techniques
  • Adaptive Modulation for OFDM and MC-CDMA
  • Successive Partial Despreading Based Multi-Code MC-CDMA
  • List of General Symbols
  • Pilot-Assisted Channel Estimation for Single-User OFDM
  • Decision-Directed Channel Estimation for Single-User OFDM
  • Channel Transfer Function Estimation for Multi-User OFDM
  • Uplink Detection Techniques for Multi-User SDMA-OFDM
  • OFDM-Based Wireless Video System Design
  • Conclusion and Further Research Problems