一种多参考接收站下的时差定位算法

doi:10.3969/j.issn.1001-2400.2014.04.006

J4 ›› 2014, Vol. 41 ›› Issue (4): 31-35+57.doi: 10.3969/j.issn.1001-2400.2014.04.006

一种多参考接收站下的时差定位算法

朱国辉;冯大政;周延

(西安电子科技大学雷达信号处理国家重点实验室，陕西西安 710071)

收稿日期:2013-03-18 出版日期:2014-08-20 发布日期:2014-09-25
通讯作者: 朱国辉
作者简介:朱国辉(1987- )，男，西安电子科技大学博士研究生，E-mail：zhugh@stu.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61271293)

TDOA location algorithm based on multi-reference receivers

ZHU Guohui;FENG Dazheng;ZHOU Yan

(National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071， China)

Received:2013-03-18 Online:2014-08-20 Published:2014-09-25
Contact: ZHU Guohui

摘要/Abstract

摘要：

提出了一种基于多参考接收站的到达时间差无源定位新算法．首先将复杂的非线性时差定位方程组转化为一组关于辐射源位置的伪线性方程，运用加权最小二乘估计对伪线性方程组进行初始求解；然后利用初始解中各分量之间的相关性，通过加权最小二乘估计进一步求解得到一组改进的辐射源位置估计; 最后取这组估计值的平均值得到辐射源位置的最终估计．仿真结果表明，该算法对近场和远场辐射源均具有较高的定位精度．

关键词: 无源定位, 到达时间差, 多参考接收站, 加权最小二乘估计, 克拉美罗界

Abstract:

A new algorithm based on multi-reference receivers for the passive location from time difference of arrival (TDOA) is proposed. The proposed algorithm first transforms the nonlinear TDOA equations into a set of pseudo-linear equations of the emitter position, and then the weighted least squares algorithm is applied to obtain the initial solution. By taking the relationship among the entries of the initial solution into account, we get a set of more accurate emitter position estimates via the weighted least squares algorithm with the obtained initial solution, the average of these estimates is then taken as the final estimate of the emitter position. Simulation results show that the proposed algorithm achieves high positioning accuracy for both near and far field emitters.

Key words: passive location, time difference of arrival, multi-reference receivers, weighted least squares estimates, Cramer-Rao lower bound

中图分类号:

TN97

朱国辉;冯大政;周延. 一种多参考接收站下的时差定位算法[J]. J4, 2014, 41(4): 31-35+57.

ZHU Guohui;FENG Dazheng;ZHOU Yan. TDOA location algorithm based on multi-reference receivers[J]. J4, 2014, 41(4): 31-35+57.

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一种多参考接收站下的时差定位算法

TDOA location algorithm based on multi-reference receivers

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