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W-CDMA: Mobile Communications System.
Edited by Keiji Tachikawa
Copyright
2002 John Wiley & Sons, Ltd.
ISBN: 0-470-84761-1
W-CDMA
MOBILE COMMUNICATIONS SYSTEM
W-CDMA Mobile
Communications System
Supervising Editor: Keiji Tachikawa
NTT DoCoMo became the first in the world to launch a next-generation mobile phone
service that enables large-capacity communications. The W-CDMA mobile communica-
tions technology, known as one of the third-generation standard, was adopted to realize
this high-speed, high-quality service. This volume, the fruit of collective efforts made
by engineers engaged in R&D at NTT DoCoMo, is a standard technical documentation
describing the basic technologies that constitute the W-CDMA mobile communications
system in detail and individual systems that are expected to play an important role in
future implementations.
W-CDMA
MOBILE COMMUNICATIONS SYSTEM
Edited by
Keiji Tachikawa
NTT DoCoMo, Inc.,
Japan
23670543.001.png 23670543.002.png
Copyright
2002
John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester,
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British Library Cataloguing in Publication Data
A catalogue record for this book is available from the British Library
ISBN 0-470-84761-1
Typeset in 10/12pt Times by Laserwords Private Limited, Chennai, India
Printed and bound in Great Britain by TJ International, Padstow, Cornwall
This book is printed on acid-free paper responsibly manufactured from sustainable forestry
in which at least two trees are planted for each one used for paper production.
Contents
Editorial Board
xi
Supervisor’s Note
xiii
Preface
xv
1 Overview
1
Keisuke Suwa, Yoshiyuki Yasuda and Hitoshi Yoshino
1.1 Generation Change in Cellular Systems
1
1.1.1 Analog Cellular Systems
1
1.1.2 Digital Cellular Systems
3
1.1.3 Mobile Internet Services
7
1.2 Overview of IMT-2000
10
1.2.1 Objectives of IMT-2000
10
1.2.2 IMT-2000 Standardization
11
1.2.3 IMT-2000 Frequency Band
18
References
19
2 Radio Transmission Systems
21
Mamoru Sawahashi
2.1 Direct Sequence Code Division Multiple Access (DS-CDMA)
21
2.1.1 Principles of DS-CDMA
21
2.1.2 Spreading Code and Spreading Code Synchronization
24
2.1.3 Configuration of Radio Transmitter and Receiver
26
2.1.4 Application of DS-CDMA to Cellular Systems
27
2.2 Basic W-CDMA Transmission Technologies
28
2.2.1 Two-Layer Spreading Code Assignment and Spreading Modulation
28
2.2.2 Cell Search
31
2.2.3 Random Access
41
2.2.4 Technologies that Satisfy Various Quality Requirements in Multirate
Transmissions
42
2.2.5 Diversity
49
2.3 Link Capacity Expansion Technologies in W-CDMA
66
2.3.1 Interference Canceller
66
2.3.2 Adaptive Antenna Array Diversity
71
References
77

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