微弱扩频通信系统主要性能指标的分析

Performance Index Analysis of Feebleness Spread Spectrum Communication

近年来 ,扩频通信以它多种优越的性能在各个领域迅速发展起来。有关微弱扩频通信系统的抗干扰性能分析及误码率分析在很多书中已给出详细的推导。重点分析了接收机灵敏度和系统电平余量这两项指标。首先简要介绍了通信系统中接收机灵敏度和系统电平余量的概念 ,然后从扩频通信的两种基本模型———直接序列扩频系统和跳频扩频系统出发 ,着重分析了在不同的扩频通信系统中这两项指标的估算方法 ,最后总结了微弱扩频通信系统应采用的技术措施。

In recent years, spread-spectrum communication has been developing rapidly in some areas because of its various superior properties. The anti-interference capability of feebleness spread spectrum communication has already been analyzed in some reference books. In this article, receiver sensitivity and system electrical level allowance are analyzed. Firstly, the concepts of receiver sensitivity and system electrical level allowance in communication system are briefly introduced. Secondly, the evaluation method of these two indexes in different spread spectrum communication systems is analyzed from two basic models such as DS-SS and FH-SS. At last, technical measures that should be taken for feebleness spread spectrum communication are summarized. We hope this article will be helpful for the further research on indexes in spread spectrum communication system.