Ultra-Wideband Pulse-based Radio Reliable Communication over a Wideb
Today's booming expanse of personal wireless radio communications is a rich source of new challenges for the designer of the underlying enabling technologies. Because the wireless channel is a shared transmission medium with only very limited resources, a
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ANALOG CIRCUITS AND SIGNAL PROCESSING SERIES Consulting Editor: Mohammed Ismail. Ohio State University
For other titles published in this series, go to http://www.springer.com/series/7381
Wim Vereecken
•
Michiel Steyaert
Ultra-Wideband Pulse-based Radio Reliable Communication over a Wideband Channel
123
Wim Vereecken Katholieke Universiteit Leuven Dept. Electrical Engineering (ESAT) Kasteelpark Arenberg 10 3001 Leuven Belgium [email protected]
Michiel Steyaert Katholieke Universiteit Leuven Dept. Electrical Engineering (ESAT) Kasteelpark Arenberg 10 3001 Leuven Belgium [email protected]
ISBN 978-90-481-2449-7 e-ISBN 978-90-481-2450-3 DOI 10.1007/978-90-481-2450-3 Springer Dordrecht Heidelberg London New York Library of Congress Control Number: 2009926324 c Springer Science+Business Media B.V. 2009 No part of this work may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording or otherwise, without written permission from the Publisher, with the exception of any material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
Contents
Preface
ix
List of Abbreviations and Symbols
xiii
1. DIGITAL COMMUNICATIONS OVER ANALOG CHANNELS
1
1.1
Wideband radio: spectral and spatial efficiency . . . . . . . .
6
1.2
Increasing the spectral bandwidth . . . . . . . . . . . . . . .
7
1.3
Onwards to software defined radio? . . . . . . . . . . . . . .
11
1.4
Interference immunity issues of wideband radio . . . . . . . .
14
1.5
Organizational overview of this text . . . . . . . . . . . . . .
18
2. MODULATION-AWARE ERROR CODING
23
2.1
Why error coding works . . . . . . . . . . . . . . . . . . . .
25
2.2
How error coding works . . . . . . . . . . . . . . . . . . . .
27
2.3
Coding: the concept of distance
. . . . . . . . . . . . . . . .
30
2.4
Coding for a narrowband, noisy channel . . . . . . . . . . . .
33
2.5
Coding and modulation for a wideband channel: OFDM . . .
35
2.6
Wideband single-carrier modulation . . . . . . . . . . . . . .
38
2.7
Conclusions on single- and multicarrier systems
44
. . . . . . .
v
vi
Contents
3. MODULATION-AWARE DECODING: SIGNAL RECONSTRUCTION
47
3.1
Principles of signal reconstruction . . . . . . . . . . . . . . .
48
3.2
ISSR decoding for wideband QPSK . . . . . . . . . . . . . .
52
3.3
Implementation aspects of the ISSR algorithm
. . . . . . . .
55
3.4
Performance of the ISSR algorithm
. . . . . . . . . . . . . .
57
3.5
ISSR under non-ideal circumstances . . . . . . . . . . . . . .
60
4. BENEFITS OF ISI IN THE INDOOR ENVIRONMENT
65
4.1
Power delay spread . . . . . . . . . . . . . . . . . . . . . . .
65
4.2
Frequency-selective versus flat fading . . . . . . . . . . . . .
69
4.3
Coherence time . . . . . . . . . . .
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