... communication satellite systems 通信卫星系统 Digital Communication and Systems 数字通信与系统 RADIO COMMUNICATION & SYSTEMS 具体介绍 ...
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Digital Communication Systems and Technology 数字通讯系统和技术
Digital Archiving and Communication Systems 数字存档与传输系统
Digital Multimedia and Communication Systems 数字多媒体和通信系统
Analysts attribute the decline to such factors as advances in digital databases and communication systems.
分析师将这种下降归因于数字数据库和通信系统的进步等因素。
Reliability and speediness are contradictory in the digital communication systems which adopt error control in order to solve reliability .
在数字通信系统中可靠与快速往往是一对矛盾。为了解决可靠性，通信系统都采用了差错控制。
IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.
引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。
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