抗窄带干扰的扩频系统的滤波器性能分析  

The Performance of the Filters in Spr ead-Spectrum System Under Narrow-Band Interference

作　　者：孙万川[1] 张蕴玉[1] 胡修林[1] 

机构地区：[1]华中科技大学,武汉430074

出　　处：《通信技术》2003年第3期22-24,共3页Communications Technology

摘　　要：在存在窄带干扰时,扩频通信系统的性能可以通过使用各种不同的抗干扰滤波器来进一步提高。通过分析预测误差滤波器和带有双边抽头的横向滤波器的抗干扰性能,得出了影响滤波器处理增益的解析表达式。当干扰频率接近扩频信号的载波频率的时候,横向滤波器的性能要优于与其抽头数相同的预测误差滤波器的性能。In the presence of narrow -band interference,the performance of spread -spectrum communication systems can be improved by using various inte rference rejection filters.In this paper,both predication error filte rs and transversal filters with two -sided taps are used and the p erformance of each is analyzed.Analytic expressions for the SNR improvement factors are obtained.If the frequency of the jamming tone is near the carrier freq uency of the spread -spectrum signal,the performance of the transversal filter is better t han that of the predication error fil ter with the same number of taps.

关 键 词：横向滤波器 窄带干扰 扩频通信 

分 类 号：TN91[电子电信—通信与信息系统]