摘要
对直接序列扩频通信的信号检测方法进行了综述,重点讨论了自相关域检测方法、四阶累积量方法、谱分析与信号子空间分解法,其中四阶统积量方法和谱分析与信号子空间分解法的最低检测门限远低于相关算法,谱分析与信号子空间分解法在直接序列扩频(DS/SS)信号的伪码周期估计以及伪码序列盲估计中,利用功率谱二次处理结合信号子空间分解的方法可以实现对低信噪比DS/SS信号的估计。
This paper reviews the detection methods for direct sequence spectrum spread communications. The self- correlated detection, fourth -order cumulant detection and the method utilizing the reprocessing of power spectrum and the subspace of DS/KS signal are mainly considered in this paper. The fourth - order cumulant detection and the method utilizing the reprocessing of power spectrum and the subspace of DS/SS signal can work well on lower SNR input signals. This paper focuses mainly on the methods utilizing the reprocessing of power spectrum and the subspace of DS/ SS signal to realize the periodic and sequence blind estimation of Pseudo Noise （PN） sequence from the lower Signal to Noise Ratios （SNR） DS/SS signals.
出处
《现代电子技术》
2007年第3期54-56,59,共4页
Modern Electronics Technique
关键词
直接序列扩频(DS/SS)信号
盲解扩
伪码序列
信号估计
Direct Sequence Spread Spectrum （DS/SS） signal
spread - spectrum despreading without the code
pseudo noise sequence
signal estimation
