扩频通信中PN码平方律捕获检测性能的统计研究

对于任何一种扩频通信PN码捕获系统来说,捕获性能在很大程度上取决于检测概率和虚警概率。在常用的平方律PN码捕获检测器中,相关器输出信号的概率密度函数是估计检测概率和虚警概率的重要依据。本文采用一种抽样数据方法导出了这个概率密度函数表达式及检测概率和虚警概率表达式,并通过了计算机仿真验证。本文研究的结果对于研究扩频通信理论和在实际系统中设计调整各种关键参数指标都是非常有用的。

The Statistical Study for Square Law PN Code Acquisition Detection Performance in Spread Spectrum Communications

For any PN code acquisition system in spread spectrum communications, the acquisition performance is largely dependent on the probabilities of detection and false alarm. In the commonly used square law PN code acquisition detector, the probability density function of the correlator output signal is the important basis for evaluating the probabilities of detection and false alarm. Described in this paper is a sampled data approach adopted to derive the expressions of the probability density function, detection and false alarm probabilities, which are then verified by computer simulations. The results presented in the paper will be very helpful for both spread spectrum communication theory research and critical parameters adjustment in practice system design.