存在站址误差时的线性校正TDOA定位算法

doi:10.3969/j.issn.1001-2400.2017.04.019

西安电子科技大学学报

存在站址误差时的线性校正TDOA定位算法

邓兵1,2;孙正波2;杨乐3;贺青2

(1. 信息工程大学信息系统工程学院，河南郑州 450002；
2. 盲信号处理重点实验室，四川成都 610041;
3. 江南大学物联网工程学院，江苏无锡 214122)

收稿日期:2016-06-15 出版日期:2017-08-20 发布日期:2017-09-29
作者简介:邓兵(1987-)，男，信息工程大学博士研究生，E-mail: dengbing0317@sina.com
基金资助:
国家自然科学基金资助项目(61172140，61304264)

TDOA localization with linear-correction in the presence of sensor position errors

DENG Bing1,2;SUN Zhengbo2;YANG Le3;HE Qing2

(1. School of Information Systems Engineering, Information Engineering Univ., Zhengzhou 450002, China;
2. National Key Lab. of Science and Technology on Blind Signal Processing, Chengdu 610041, China;
3. School of Internet of Things (IoT) Engineering, Jiangnan Univ., Wuxi 214122, China)

Received:2016-06-15 Online:2017-08-20 Published:2017-09-29

摘要/Abstract

摘要：

针对到达时间差定位中接收传感器位置信息含有随机误差这一问题，提出了一种线性校正到达时间差定位算法．首先通过引入中间变量将非线性时差定位方程转化为伪线性方程，并利用加权最小二乘估计求得目标位置的初始解; 接着通过求解初始位置估计的误差对目标位置初始解进行线性校正，得到目标位置更为精确的最终估计．仿真结果验证了所提算法具有较好的定位性能．

关键词: 无源定位, 到达时间差, 站址误差, 加权最小二乘估计, 克拉美罗界

Abstract:

This paper considers the problem of locating a source using time difference of arrival(TDOA) measurements obtained at spatially distributed sensors in the presence of sensor position errors. A linear-correction TDOA localization algorithm that involves closed-form weighted least squares(WLS) optimization only is developed. The proposed method first converts nonlinear TDOA equations into pseudo-linear ones by introducing an intermediate variable and obtains the initial source position estimate using the WLS technique. Then a linear-correction method is applied to improve the initial localization result by estimating and subtracting its positioning error. Simulation results demonstrate the good performance of the proposed method.

Key words: passive localization, time difference of arrival, sensor position error, weighted least squares estimation, Cramer-Rao lower bound

邓兵;孙正波;杨乐;贺青. 存在站址误差时的线性校正TDOA定位算法[J]. 西安电子科技大学学报, 2017, 44(4): 106-111.

DENG Bing;SUN Zhengbo;YANG Le;HE Qing. TDOA localization with linear-correction in the presence of sensor position errors[J]. Journal of Xidian University, 2017, 44(4): 106-111.

参考文献

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存在站址误差时的线性校正TDOA定位算法

TDOA localization with linear-correction in the presence of sensor position errors

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