Fundamentals of Wireless Communication

dsp2008

好啊，谢谢楼主！

laiee

好书!!!!!

semico_ljj

对这类大公无私，造福网友的资料共享行为不顶就是对不起良心

semico_ljj

copyright© Cambridge University Press 2005

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Preface

Why we wrote this book

The writing of this book was prompted by two main developments in wireless
communication in the past decade. First is the huge surge of research activities
in physical-layer wireless communication theory. While this has been a subject
of study since the sixties, recent developments such as opportunistic and multiple
input multiple output (MIMO) communication techniques have brought
completely new perspectives on how to communicate over wireless channels.
Second is the rapid evolution of wireless systems, particularly cellular networks,
which embody communication concepts of increasing sophistication.
This evolution started with second-generation digital standards, particularly
the IS-95 Code Division Multiple Access standard, continuing to more recent
third-generation systems focusing on data applications. This book aims to
present modern wireless communication concepts in a coherent and unified
manner and to illustrate the concepts in the broader context of the wireless
systems on which they have been applied.

Structure of the book

This book is a web of interlocking concepts. The concepts can be structured
roughly into three levels:
1. channel characteristics and modeling;
2. communication concepts and techniques;
3. application of these concepts in a system context.
A wireless communication engineer should have an understanding of the
concepts at all three levels as well as the tight interplay between the levels.
We emphasize this interplay in the book by interlacing the chapters across
these levels rather than presenting the topics sequentially from one level to
the next.
• Chapter 2: basic properties of multipath wireless channels and their modeling
(level 1).
• Chapter 3: point-to-point communication techniques that increase reliability
by exploiting time, frequency and spatial diversity (2).
• Chapter 4: cellular system design via a case study of three systems, focusing
on multiple access and interference management issues (3).
• Chapter 5: point-to-point communication revisited from a more fundamental
capacity point of view, culminating in the modern concept of opportunistic
communication (2).
• Chapter 6: multiuser capacity and opportunistic communication, and its
application in a third-generation wireless data system (3).
• Chapter 7: MIMO channel modeling (1).
• Chapter 8: MIMO capacity and architectures (2).
• Chapter 9: diversity–multiplexing tradeoff and space-time code design (2).
• Chapter 10: MIMO in multiuser channels and cellular systems (3).

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How to use this book
This book is written as a textbook for a first-year graduate course in wireless
communication. The expected background is solid undergraduate/beginning
graduate courses in signals and systems, probability and digital communication.
This background is supplemented by the two appendices in the book.
Appendix A summarizes some basic facts in vector detection and estimation
in Gaussian noise which are used repeatedly throughout the book. Appendix B
covers the underlying information theory behind the channel capacity results
used in this book. Even though information theory has played a significant
role in many of the recent developments in wireless communication, in the
main text we only introduce capacity results in a heuristic manner and use
them mainly to motivate communication concepts and techniques. No background
in information theory is assumed. The appendix is intended for the
reader who wants to have a more in-depth and unified understanding of the
capacity results.
At Berkeley and Urbana-Champaign, we have used earlier versions of this
book to teach one-semester (15 weeks) wireless communication courses. We
have been able to cover most of the materials in Chapters 1 through 8 and
parts of 9 and 10. Depending on the background of the students and the time
available, one can envision several other ways to structure a course around
this book. Examples:
• A senior level advanced undergraduate course in wireless communication:
Chapters 2, 3, 4.
• An advanced graduate course for students with background in wireless
channels and systems: Chapters 3, 5, 6, 7, 8, 9, 10.
• A short (quarter) course focusing on MIMO and space-time coding: Chapters
3, 5, 7, 8, 9.
The more than 230 exercises form an integral part of the book. Working on
at least some of them is essential in understanding the material. Most of them
elaborate on concepts discussed in the main text. The exercises range from
relatively straightforward derivations of results in the main text, to “backof-
envelope” calculations for actual wireless systems, to “get-your-handsdirty”
MATLAB types, and to reading exercises that point to current research
literature. The small bibliographical notes at the end of each chapter provide
pointers to literature that is very closely related to the material discussed in
the book; we do not aim to exhaust the immense research literature related to
the material covered here.

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1 Introduction

1.1 Book objective
Wireless communication is one of the most vibrant areas in the communication
field today. While it has been a topic of study since the 1960s,
the past decade has seen a surge of research activities in the area. This is
due to a confluence of several factors. First, there has been an explosive
increase in demand for tetherless connectivity, driven so far mainly by cellular
telephony but expected to be soon eclipsed by wireless data applications.
Second, the dramatic progress in VLSI technology has enabled small-area
and low-power implementation of sophisticated signal processing algorithms
and coding techniques. Third, the success of second-generation (2G) digital
wireless standards, in particular, the IS-95 Code Division Multiple Access
(CDMA) standard, provides a concrete demonstration that good ideas from
communication theory can have a significant impact in practice. The research
thrust in the past decade has led to a much richer set of perspectives and tools
on how to communicate over wireless channels, and the picture is still very
much evolving.
There are two fundamental aspects of wireless communication that make
the problem challenging and interesting. These aspects are by and large not
as significant in wireline communication. First is the phenomenon of fading:
the time variation of the channel strengths due to the small-scale effect of
multipath fading, as well as larger-scale effects such as path loss via distance
attenuation and shadowing by obstacles. Second, unlike in the wired
world where each transmitter–receiver pair can often be thought of as an
isolated point-to-point link, wireless users communicate over the air and there
is significant interference between them. The interference can be between
transmitters communicating with a common receiver (e.g., uplink of a cellular
system), between signals from a single transmitter to multiple receivers
(e.g., downlink of a cellular system), or between different transmitter–receiver
pairs (e.g., interference between users in different cells). How to deal with fading
and with interference is central to the design of wireless communication
systems and will be the central theme of this book. Although this book takes
a physical-layer perspective, it will be seen that in fact the management of
fading and interference has ramifications across multiple layers.

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Traditionally the design of wireless systems has focused on increasing the
reliability of the air interface; in this context, fading and interference are
viewed as nuisances that are to be countered. Recent focus has shifted more
towards increasing the spectral efficiency; associated with this shift is a new
point of view that fading can be viewed as an opportunity to be exploited.
The main objective of the book is to provide a unified treatment of wireless
communication from both these points of view. In addition to traditional
topics such as diversity and interference averaging, a substantial portion of
the book will be devoted to more modern topics such as opportunistic and
multiple input multiple output (MIMO) communication.
An important component of this book is the system view emphasis: the
successful implementation of a theoretical concept or a technique requires an
understanding of how it interacts with the wireless system as a whole. Unlike
the derivation of a concept or a technique, this system view is less malleable
to mathematical formulations and is primarily acquired through experience
with designing actual wireless systems. We try to help the reader develop
some of this intuition by giving numerous examples of how the concepts are
applied in actual wireless systems. Five examples of wireless systems are
used. The next section gives some sense of the scope of the wireless systems
considered in this book.

ntynty

thanks

nikka

Tse is the legend superman!!!