一种新的非直达波传播环境下的TDOA定位方法  

A Novel TDOA-Based Localization Method in Non-Line-of-Sight Propagation Environments

作　　者：饶中初 黄际彦[2] 

机构地区：[1]同方电子科技有限公司,九江332007 [2]电子科技大学,成都610054

出　　处：《电子对抗》2015年第4期13-16,38,共5页Electronic Warfare

摘　　要：加权线性最小二乘定位算法在直达波传播条件下具有良好的定位性能，但是在非直达波传播导致的大误差环境下，基于均方代价函数最小化的常规方法未能有效抑制大误差对算法的影响，仍存在进一步改进的余地。文章提出一种基于非线性稳健代价函数的TDOA定位方法，目前常用的时差定位算法仅是该算法在直达波传播环境中的特例。仿真结果表明，该方法能较好地抑制非直达波误差对时差定位性能的不良影响。Though the weighted least squares algorithm for mobile location performs well in line of sight propagation, the conventional method which based on minimizing mean square objective function may be improved further in non-line-of-sight （NLOS） environments, because it can＇ t effectively mitigate big error. In this paper, a TDOA-based localization method which minimi- zing nonlinear robust objective function is proposed to mitigate NLOS error, the ordinary differ- ence range location algorithm coincides with a special case of this method. The simulation shows that it improves the location performance significantly in difference NLOS environments.

关 键 词：到达时间差 移动定位 非直达波误差 稳健代价函数 

分 类 号：TN929.53[电子电信—通信与信息系统]