一种NLOS环境下基于散射模型的TOA定位方法  

A Method for TOA Location Based on Scattering Models in NLOS Environments

作　　者：屈保平[1] 袭著有[2] 陈长衍 

机构地区：[1]西北工业大学电子信息学院 [2]辽宁工业大学理学院 [3]解放军94900部队信息支援站

出　　处：《火力与指挥控制》2014年第5期27-30,35,共5页Fire Control & Command Control

基　　金：航天支撑技术基金(N7CH0004);航天科技创新基金资助项目(N7CH0003)

摘　　要：减小非视距(Non Line Of Sight,NLOS)误差定位算法大多要求在移动台和基站之间至少存在一条视距(Line Of Sight,LOS)路径。提出一种新的NLOS环境中基于散射模型分类传播环境的TOA(Time Of Arrival)定位方法,将散射模型中NLOS传播的统计特性加入到定位算法中,使用散射模型研究了3种定位算法,方差匹配算法,期望最大算法和贝叶斯算法。并对算法进行仿真,仿真结果表明,本算法性能优于传统定位算法。Most of the algorithms mitigating NLOS（Non Line of Sight）error require there is a LOS（Line of Sight）path between mobile station and base stations at least.The paper proposes a new TOA location methodology based on scattering models to classify propagation environments. The statistics of NLOS of scattering models is incorporated into location algorithm. By using scattering model,three novel location algorithms are researched,such as variance matching algorithm,the expectation algorithm and bayesian algorithm.The results of simulation show the proposed algorithms provide improvement over traditional location algorithms.

关 键 词：TOA定位 方差匹配 NLOS环境 散射模型 

分 类 号：TN929.5[电子电信—通信与信息系统]