一种改进的直扩系统频域抑制窄带干扰算法  

An Improved Frequency-Domain Algorithm for Narrowband Interference Suppression in DSSS

作　　者：邹宁[1] 徐松涛[1] 刘凯[1] 刘明园[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《火力与指挥控制》2011年第5期121-124,共4页Fire Control & Command Control

摘　　要：提出了一种基于比较变异系数统计平均的自适应多门限窄带干扰抑制算法。该算法用变异系数的统计平均作为切换准则,当干信比较小时利用直扩系统本身的匹配滤波器进行相关解扩,而当大干信比时切换到自适应多门限算法进行干扰抑制。理论分析和计算机仿真结果均验证了变异系数作为切换准则的有效性,并且表明了该算法在直扩系统中抑制窄带干扰具有更高的自适应性。This paper proposes a adaptive multi-threshold narrowband interference suppression algorithm based on comparing statistical mean of Coefficient of Variation（CV）.The algorithm use statistical mean of CV as switching metric,the CV metric turn to matched filter when Jammer-to-Signal Ratio（JSR） is low,and turn to adaptive multi-threshold algorithm for narrowband interference suppression when the JSR is high.Theoretical analysis and simulation results show that the CV is effective as switching metric and that the algorithm has better adaptive capability in suppressing narrowband interference in DSSS.

关 键 词：直接序列扩频 变异系数 自适应多门限 窄带干扰抑制 

分 类 号：TN914.42[电子电信—通信与信息系统]