摘要
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带来了系统测速精度较低的问题。针对这一问题,提出一种基于维纳滤波器的跟踪环路结构,从而提高测控系统测速精度的方法,推导了滤波器的加权系数。仿真结果表明,经过优化之后的测速精度得到改善,且改善效果与滤波器阶数n有关,当n为5倍一跳采样点数时,系统的测速精度达到30 cm/s,比未使用维纳滤波时候的测速精度提高了约3倍。
Compared with the traditional TT＆C system for fixed carrier frequency signal, using FH and SS signals to perform velocity measurement improves the performance of anti -interference of the TT＆C system,while bring the low signal tracking accuracy. In order to solve this problem,this paper proposes a tracking loop structure based on wiener filter to increase the velocity measurement accuracy of the TT＆C system, the filter coefficient is deduced. Simulation results show that the velocity measurement accuracy is improved after optimization,and the improvement is related to the filter ordern , whenn = 5f/fh , the velocity measurement accuracy reaches 30cm/swhich is about 4 times as high as that before using the wiener filter.
出处
《无线电通信技术》
2013年第5期47-50,共4页
Radio Communications Technology
关键词
跳频
维纳滤波器
测速精度
FH
Wiener filter
velocity measurement accuracy
