适用于NLOS传播环境的几何定位方法

A Geometrical Position Location Method Suitable for NLOS Environment

基于非视距传播(NLOS)的影响,移动通信环境中波达时间(TOA)的测量误差具有正偏置的特性,本文提出了一种简单的几何定位方法。该方法根据基站分布和TOA测量数据确定出若干个定位点,对这些点的坐标取平均值即得到移动台的位置估计。仿真结果表明,该方法能够有效提高NLOS传播环境下的定位精度,对LOS传播条件下的定位精度影响小。

Based on the positive bias property of the Time-Of-Arrival（TOA）measurement error caused by Non- Line-Of-Sight（NLOS）propagation in the mobile communication environment, a simple geometrical position location method is presented. Some sites are determined according to the coordinates of the base-stations and TOAs, and the location estimation of mobile station is achieved by averaging the coordinates of these sites. The simulation results show that this method can effectively improve the location accuracy in NLOS environment with little degeneration to mobile location in LOS environment.