摘要
针对利用信号时差和频差信息的固定多站对运动辐射源定位问题,提出了一种基于加权最小二乘的单次定位解算新方法和基于扩展卡尔曼滤波的多次定位跟踪滤波方法。分析了存在时差和频差参数测量误差条件下的单次定位误差克拉美-罗下限几何分布图,并仿真了多次定位条件下的定位性能,将其与仅测时差定位的性能进行了比较。仿真表明,增加频差信息有助于提高对运动辐射源的定位跟踪精度。
To solve the problem of time difference of arrival (TDOA) and frequency difference of arrival (FDOA) localization by fixed sensors, a new localization solution based on weighted least square and a tracking method based on extended Kalman filter are proposed. The geometric distribution of precision (GDOP) of localization Cramer-Rao lower bound (CRLB) is analyzed under the circumstances which some measurements errors exist in TDOA and FDOA parameters. The tracking performance of multiple-times measurements is simulated and is compared with performance using TDOA only. Simulation results show that adding FDOA information is useful to improve tracking precision of moving emitters.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2011年第9期1954-1958,共5页
Systems Engineering and Electronics
基金
国家自然科学基金(60702010)
国防科技重点实验室基金(9140C860304)资助课题
关键词
无源定位
时差
频差
克拉美-罗下限
passive localization
time difference of arrival (TIN)A)
frequency difference of arrival (FDOA)
Cramer-Rao lower bound (CRLB)