摘要
为了消除直接扩频通信系统中宽带干扰信号,极性消除(Polar Exciser)算法被提出,其实质是极性转换和变换域陷波滤波的结合。但其在干扰功率较低时,系统性能急剧下降。本文提出了一种基于极性消除算法的改进算法,用以消除不同类型的宽带恒包络干扰信号。本文通过引入变异系数来选择使用极性消除干扰抑制器还是匹配滤波器。对通过改进后的极性消除算法来抑制宽带恒包络干扰信号后的误码率进行仿真,结果表明了该改进算法对宽带恒包络的干扰信号有着较好的抑制作用,且变异系数是一种有效的切换策略。
A new interference suppression method named Polar Exciser（ PE） was proposed to suppress the broadband interference signal in the direct sequence spread spectrum（ DSSS） communication systems. Polar Exciser interference suppression algorithm is a combination of a polar transformation and a transform domain notch filtering. But when the power of interference is low,its performance degrades. In this paper,an improved suppression scheme against different types of broadband constant envelope interference named improved Polar Exciser（ IMPE） is proposed. The IMPE introduces Coefficient of Variation（ CV） criterion to select the PE suppressor or matched filter（ MF）. The BER performance has been simulated in suppressing a broadband constant envelope interference with arbitrary power using proposed IMPE algorithm. Simulation results show that the IMPE can suppress the interference effectively and the CV is a good metric for selecting PE or MF.
出处
《微型机与应用》
2016年第3期68-71,共4页
Microcomputer & Its Applications
关键词
极性消除
扫频
线性调频
变异系数
误码率
polar exciser
frequency sweeping
linear frequency modulation
coefficient of variation
bit error rate
