數(shù)字通信

內(nèi)容概要

《數(shù)字通信——離散時(shí)間方法(英文影印版)》運(yùn)用離散信號處理的原則來介紹和分析數(shù)字通信，連接了實(shí)時(shí)和離散方式。注重理論與實(shí)踐相結(jié)合。涵蓋了離散信號處理、離散濾波器設(shè)計(jì)、多速率處理及估計(jì)理論，并提出了基于離散信號的空間分析、數(shù)值算法。《數(shù)字通信——離散時(shí)間方法(英文影印版)》可作為電子信息工程、通信工程專業(yè)本科生教材，也可作為相關(guān)領(lǐng)域工程技術(shù)人員的參考書。本書由Michael
Rice著。

書籍目錄

Foreword
Preface
Chapter I  Introduction
  1.1  A Brief History of Communications
  1.2  Basics of Wireless Communications
  1.3  Digital Communications
  1.4  Why Discrete-Time Processing Is So popular
  1.5  Organization of the Text
  1.6  Notes and References
Chapter 2  Signals and Systems 1: A Review of theBasics
  2.1  Introduction
  2.2  Signals
    2.2.1  Continuous-Time Signals
    2.2.2 Discrete-Time Sigm/ls
  2.3  Systems
    2.3.1  Continuous-Time Systems
    2.3.2  Discrete-Time Systems'
  2.4  Frequency Domain Characterizations
    2.4.1  Laplace Transform
    2.4.2  Continuous-Time Fourier Transform
    2.4.3  Z Transform
    2.4.4  Discrete-Time Fourier Transform
  2.5  The Discrete Fourier Transform
  2.6  The Relationship Between Discrete- lime
    and Continuous-Time Systems
    2.6.1 The Sampling ,Theorem
    2.6.2  Discrete-Time Processing of Continuous-Time Sij~nals
  2.7  Discrete-Time Processing of Band-Pass Signals
 ……

章節(jié)摘錄

　　In the 1980s， the desire to increase the capacity and suite of services offered to mobile telephone customers prompted the development of digital communication systems. GSM，the digital mobile telephone standard in Europe， was deployed in the 1980s， whereas digital standards such as IS-54 and IS-136 （TDMA/FDM） and IS-95 （CDMA） were deployed in the United States in the 1990s. In addition to voice， digital radio is becoming more popular and television is increasingly delivered in a digital format （HDTV is an integrated digital video/audio format）. The corresponding communications link is a digital communications link.　　Data communication systems are also following this trend. One example is aeronautical telemetry.9 In aeronautical telemetry， the performance of an airborne "test article" is monitored by using a radio link to transmit the measurements output by a set of transducers to a ground-based monitoring station. The first aeronautical telemetry links were analog AM in the 1940s and analog FM in the 1950s. The output of each transducer modulated a separate carrier frequency to form the telemetry downlink. As airborne systems became more complex， more onboard measurements had to be collected and radioed to the ground. The use of separate carriers for each one proved unwieldy and uneconomical. By the 1970s， digital technology had progressed to the point where a new approach was possible. The transducer outputs were sampled to form a bit stream. The bit streams from all transducers were combined to form a composite bit stream that was used to modulate a single carrier. A digital version of FM （known as PCM/FM in the IRIG 106 Standard） became the most popular choice.　　……

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