摘要
单音干扰是扩频通信系统中的一种常见干扰 ,系统解扩前引入抗单音干扰算法能够有效抑制单音干扰 ,提高系统性能 .由于扩频序列的周期性 ,使得扩频信号表现出循环平稳特性 ,同时单音干扰模型中正弦函数的周期性 ,使得单音干扰也是循环平稳信号 .文中基于扩频信号及干扰循环平稳特性 ,提出了一种新的抗干扰算法 .实验证明 。
A system with a certain processing gain has a certain interference allowance. When the interference intensity exceeds the allowance, the system performance degrades rapidly. The narrowband interference rejection capability of a DSSS system can be enhanced considerably by an interference rejection algorithm prior to correlating it with the Pseudo Noise (PN) sequence. The periodicity of PN sequence and the sine function in the single tone interference model make them cyclostationary respectively. In this article, the SS signal and interference were modeled as cyclostationary. Compared with the stationary model, it can preserve more information. Based on cyclostationary model, a new interference rejection approach was introduced. The simulation shows that this algorithm can improve the system performance considerablely.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2002年第6期803-806,共4页
Journal of Shanghai Jiaotong University
基金
国防重点实验室基金资助项目 (99JS 63 .3 .1.JW0 3 0 1)
