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.

TN957