一种基于门限判决的窄带干扰抑制频域自适应算法  

The Adaptive Algorithm of Narrowband Interference Suppression Based on Threshold Decision in Frequency-Domain

作　　者：张爱民[1] 龚广伟[1] 韩方景[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子信息对抗技术》2009年第4期48-53,共6页Electronic Information Warfare Technology

基　　金：航空科学基金项目(20060112005)

摘　　要：为了解决直接序列扩频系统中强窄带干扰的抑制问题,提出一种基于门限判决的频域自适应算法。该算法利用干扰门限值估计和优化自适应滤波器参数,不但大大加快了收敛速度还提高了跟踪能力,而且保证了较小的稳态误差。理论分析和仿真结果表明:该算法可以有效抑制直扩系统中时变窄带干扰。In order to solve the problem of strong narrowband interference suppression in direct se- quence spread system, an adaptive algorithm is proposed which is based on threshold decision in frequency-domain. The algorithm can estimate and optimize the parameters of adaptive filter with the interference threshold, not only the convergence speed and track performance is improved dramatically, but also the steady state error is small. Theoretical analysis and simulation show that the algorithm can suppress the time-variance narrowband interference effectively in direct sequence spread system.

关 键 词：门限判决 自适应滤波 窄带干扰抑制 

分 类 号：TN971.1[电子电信—信号与信息处理]