基于维纳滤波的跳频信号跟踪优化

相对于传统的固定载波频率信号的测控体制，使用跳频扩频信号进行测速在提高了测控系统抗干扰能力的同时也带来了信号跟踪精度不高的问题。针对这一问题，该文提出一种使用维纳滤波器优化传统环路的方法，推导了滤波器的加权系数。仿真结果表明，经过优化之后的环路跟踪精度得到改善，且改善效果与滤波器的阶数n有关。当n=10时，系统的测速精度达到30cm／s比未使用维纳滤波时的测速精度提高了约3倍。

The Tracking Optimization of the FH Signal Based on Wiener Filtering

Compared with the traditional fixed carrier frequency signal,using FH （Frequency-Hopped） sig-nals improved the performance of anti-interference of the TT＆C system when bring the low signal tracking accuracy.In order to solve this problem,this paper proposed a loop structure of using wiener filter,the filter coefficient was deduced.Simulation results show that the loop tracking precision was increased after the optimization,and the improvement has retations with the filter order n.When n=10,the speed measuring pre-cision reached 30cm/s which was increased about 3 times than did not use wiener filter.