NLOS环境下几种TOA定位算法的性能比较  

Performance Comparison of Several TOA Algorithms in Circumstances of NLOS

作　　者：程相波[1] 冯光焰[1] 孙雪峰 

机构地区：[1]武警石家庄指挥学院,河北石家庄050061 [2]总参宣化通信训练基地,河北宣化075100

出　　处：《无线电工程》2010年第4期35-37,共3页Radio Engineering

摘　　要：通过测量基站3条或更多不同路径的来自移动站的信号到达时间,可以对移动站进行定位。然而信号的非视距传输却极大地影响了TOA定位算法的定位精度,不同的定位算法在不同的条件下获得的定位精度也不同。对几种TOA定位算法(包括最小均方算法、近似最大似然估计算法、残差加权和残差检测算法)在非视距环境下的性能进行仿真,根据仿真结果,在实际应用中可以针对不同的环境选择最合适的定位算法。The location of a mobile station（MS）can be got according to three or more arrival time of signals from MS to BS（base station）,however,the accuracy of TOA（time of arrival）is influenced by the non-line-of-sight（NLOS）transmission.Different algorithms gain different accuracies in different circumstances.Several TOA algorithms in circumstances of NLOS are simulated,including LS（least square）,AML（approximate maximum likelihood）,Rwgh（residual weighting）and RT（residual test）algorithm.According to the simulation,the characteristics of these algorithms are presented,and proper algorithm can be selected for reducing the influence of NLOS.

关 键 词：非视距 最小均方 近似最大似然 残差加权 残差检测 

分 类 号：TN929.5[电子电信—通信与信息系统]