直接扩频序列系统中IIR格型自适应滤波抗多窄带干扰  

Anti-multi-narrow Band Interference in DSSS Systems Using Adaptive IIR Notch Filter

作　　者：刘刚[1] 张继龙[1] 姚广峰[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800

出　　处：《现代雷达》2004年第6期50-53,共4页Modern Radar

摘　　要：介绍了一种直接扩频系统中抗多个窄带干扰的多支路自适应IIR陷波滤波算法。通过频率分离 ,在各个支路通过谱线增强器估计干扰的瞬时频率和功率 ,减少了输入信号特征值扩散程度 ,加快了自适应算法收敛速度。采用一种IIR自适应格型陷波滤波技术 ,调整陷波器的深度 ,提高了输出信号信噪比。A multi band anti jamming algorithm for multi narrow band interference in direct sequence spread spectrum systems, based on the adaptive IIR notch filtering is introduced. Through separating the input signal, an adaptive line enhancer (ALE) is used to estimate the instantaneous frequency and power of interference in each sub band, so the eigenvalue spread is reduced, which accelerates the speed of convergence. The depth of the notch is adjusted by using the adaptive lattice IIR notch filter, so as to improve the SNR of output signal.

关 键 词：窄带干扰 自适应IIR陷波滤波器 谱线增强器 抗干扰 

分 类 号：TN914.42[电子电信—通信与信息系统]