| 摘要: |
| 针对三星时差无源定位体制的特点，研究空中运动目标辐射源定位技术。在匀
速直线运动目标模型下，通过改变地球方程参数，利用牛顿迭代算法给出目标的瞬时初始定
位点，并在此基础上利用不敏卡尔曼滤波对运动目标进行跟踪定位。仿真验证表明
，利用三星时差测量体制和相关滤波算法，可以有效实现空中运动目标的跟踪定位，精度优
于5 km；同时在精确初始值的引导下，滤波算法收敛速度更快，定位精度更高，航迹更
为连续。 |
| 关键词: 无源定位 三星时差 运动目标跟踪 卡尔曼滤波 |
| DOI： |
|
| 基金项目: |
|
| Tri-satellite Differential Time Offset Location Technology for Moving Target Based on Kalman Filter |
| CHEN Xi,PENG Hua-feng,TONG Wu-qing |
| (School of Information Engineering,Information Engineering University,Zhengzh
ou 450002,China;
Institute of Southwest Electronic & Telecommunication Techniques,Chengdu 61004
1,China) |
| Abstract: |
| Based on the passive location system of Tri-satellite DTO(Differential Time Offs
et), the emitter
location technology for air moving target is researched in this paper. Under th
e consta
nt velocity(CV) model, after changing the parameters of earth equation, the New
ton iterative method is used to give the immediate location point. Based on the
original result, the unscented Kalman filter(UKF) algorithm is proposed to solve
the
problem about moving target tracking and location. The simulation result shows t
he tri-satellite DTO and relative filter algorithm are effective for the air mov
ing t
arget tracking and location , and the precision is much better than 5km. Under t
he support of original location result, the filter algorithm is better in conver
gence rate, location precision and continuity trajectory than the traditional me
thods. |
| Key words: passive location tri-satellite DTO motion target tracking Kalman filter |
《电讯技术》编辑部 