Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (9): 1954-1958.doi: 10.3969/j.issn.1001-506X.2011.09.08

• 电子技术 • 上一篇    下一篇

基于时差和频差的固定多站定位方法及分析

郭福成, 李腾   

  1. 国防科学技术大学电子科学与工程学院, 湖南 长沙 410073
  • 出版日期:2011-09-17 发布日期:2010-01-03

Passive localization method and its precision analysis based on TDOA and FDOA of fixed sensors

GUO Fu-cheng, LI Teng   

  1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Online:2011-09-17 Published:2010-01-03

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。

Abstract:

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.