基于递归最小二乘算法的时相调制频移滤波方法  

Frequency shift filtering of time-phase modulation based on recursive least-square algorithm

作　　者：毛忠阳[1] 王红星[1] 王洪利 赵培洪[1] 赵志勇[1] 

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001

出　　处：《电波科学学报》2012年第4期739-746,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金项目(60772056);山东省"泰山学者"建设工程专项

摘　　要：针对噪声干扰,利用时相调制信号的谱相关特性,采用非平稳信号处理方法,提出一种基于递归最小二乘算法的时相调制频移滤波方法;同时对具有循环平稳特性的干扰源抑制方法进行了讨论,并分别给出相应的滤波器框图;对采用该滤波器前后的时相调制系统性能进行了仿真与比较。仿真结果表明:与循环相关匹配滤波方法相比,基于最小二乘算法的时相调制频移滤波方法可以有效抑制噪声对时相调制系统的影响,在满足10-5的误码率条件下,系统的功率需求降低约3dB.In order to deal with noise interference on time phase modulation （TPM） signals, a frequency shift filtering method is proposed based on recursive least- square（RLS）algorithm by using non-stationary signal processing method and spec- tral characteristic of TPM. At the same time, the way of removing interferences which show cycle stationary characteristic is discussed, and the filter diagrams of these two filtering methods are presented. Finally, the performance of the filtering method is simulated and compared. The simulation shows that frequency shift filte- ring method of TPM based on RLS algorithm can suppress noises effectively, and the power requirement probably decreases 3 dB when the BER is equal to 10^-5.

关 键 词：相位突变调制 时相调制 谱相关 频移滤波 

分 类 号：TN911.22[电子电信—通信与信息系统]