基于小波包变换的DS/FH系统抗窄带干扰研究

摘要

为了进一步提高直接序列/跳频(DS/FH)扩频系统的抗干扰能力,基于小波包变换结合递归最小二乘算法设计了一种变换域自适应干扰抑制算法,该算法采用小波包分解定位窄带干扰,递归最小二乘算法抑制窄带干扰.通过蒙特卡罗仿真分析在增加抗干扰模块后,DS/FH系统工作在准静态时,在不同信噪比条件下抗窄带干扰性能.仿真结果表明:该算法具有较强的自适应性以及抗窄带干扰能力,其性能优于传统的直接置零法,适用于多音干扰下的恶劣通信环境.%To improve the ami-jamming performance of DS/FH hybrid system, a new adaptive narrow-band interference rejection method based on wavelet packet transform and combined with recursive least squares (RLS) algorithm is presented. Firstly, the interference is well located through wavelet packet decomposition, and is rejected by the RLS. by monte carlo simulation analysis we can get that when the DS/FH system work at quasi-static model, the proposed algorithm has strong adaptability and reject narrowband interference ability, the performance is better than the traditional direct zeros method, which is suitable for multi-tone interference complex communication environment.