移动通信信号处理手册

sandayyang

1.1 Introduction
The ability to communicate on the move has evolved remarkably since Guglielmo Marconi first demonstrated
radio’s ability to provide continuous contact with ships sailing the English Channel. That was
in 1897, and since then people throughout the world have enthusiastically adopted new wireless communications
methods and services. Currently, when the telecommunications industries are deploying
third-generation (3G) systems worldwide and researchers are presenting many new ideas for the nextgeneration
wireless systems (termed 4G), several challenges are yet to be fulfilled. These include high data
rate transmissions (up to 1 Gbps),multimedia communications, seamless global roaming, quality of service
(QoS) management, high user capacity, integration and compatibility between 3G and next-generation
components, etc. To meet these challenges, researchers are presently focusing their attentions on different
signal processing issues after careful channel characterizations. This chapter will provide brief background
information on these issues. It will also include some information on the current research works and
challenges in these areas. The outline of the chapter follows: Section 1.2 discusses basic information on the
channel characterization aspects. Section 1.3 presents an overview of the different modulation schemes
that are getting the most attention in the research area. Coding techniques are discussed in Section 1.4.
Section 1.5 talks about different multiple access schemes, while Section 1.6 presents different diversity
scenarios. Finally, conclusions are drawn.
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[ 本帖最后由 sandayyang 于 2008-2-29 20:28 编辑 ]

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part3

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part 4

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part 5

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part 5

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part 6

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part 7

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part 8

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part 9