直接序列扩频信号的盲检测

摘要

In this paper,time domain correlation detection method,cyclic spectral detection method,cepstrum detection method and high-order statistics detection method are introduced to detect DSSS signal.Simulation shows that the time domain correlation and cyclic spectral cannot detect DSSS at low SNR.Contrast with high-order statistics,cepstrum spent less time,is more promising.%本文将时域相关检测法,循环谱检测法,倒谱检测法和高阶累积量检测法四种方法应用于直接序列扩频信号（DSSS）的盲检测,给出了具体的实现方法,并通过仿真实验进行验证比较,结果表明,时域相关法和循环谱法并不适用于低信噪比情况下信号的盲检测,相对于高阶累积量法,倒谱法在实时性方面有较大优势,有较好的发展前景。