基于卡尔曼滤波的跳频信号跟踪算法  

Tracking Algorithm of Frequency-Hopped Signal Based on Kalman Filtering

作　　者：楼德侃[1] 李志强[2] 朱文明[2] 贾鹏[2] 陈啸[3] 

机构地区：[1]解放军理工大学通信工程学院研究生3队,江苏南京210007 [2]解放军理工大学通信工程学院 [3]解放军理工大学通信工程学院研究生1队

出　　处：《军事通信技术》2012年第4期38-41,62,共5页Journal of Military Communications Technology

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信号跟踪精度不高的问题。针对这一问题,文章提出一种使用卡尔曼滤波器替换传统锁频环路低通滤波器的环路结构,推导了卡尔曼滤波器跟踪算法的递推公式。仿真结果表明,经过改进之后的环路跟踪精度大大提高,系统的测速精度达到15cm/s,比未使用卡尔曼滤波时候的测速精度提高了约6倍。Compared with the traditional fixed carrier frequency signal, the frequency hop- ping spread spectrum signal improves the anti-interference performance of the TT＆C system but brings with it the low tracking precision. In order to solve this problem, a loop structure was proposed that using Kalman filter to replace the low-pass filter of the traditional FLL, and the re- cursive formula of the Kalman filtering tracking algorithm was deduced. The simulation results show that the tracking precision of the loop increases greatly, and that the speed measuring precision reaches 15 cm/s, which is six times when that of the case Kalman filtering was not used.

关 键 词：跳频 卡尔曼滤波器 跟踪精度 

分 类 号：TN911[电子电信—通信与信息系统]