无线传感网中高精度的静止目标定位算法  

Precise Localization Algorithm for Stationary Target in WSN

作　　者：吴泽民[1] 张磊[1] 王海[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《系统仿真学报》2009年第S2期34-37,42,共5页Journal of System Simulation

基　　金：国家自然科学基金(60672080);国家863高技术项目(2008AA01Z216);国家973项目(2009CB3020402)

摘　　要：分析了传感器网络中固定或慢速运动目标定位算法的缺陷,提出了一种基于精确传播时延测量的新算法。对时间采样和时延测量机制进行了详细描述,使测量误差达到CPU指令周期级。该算法同时考虑了时延测量受非视距(NLoS)的影响,在定位解算时用方差加权法使用尽量多的视距(LoS)测量值。经仿真,该算法对LoS环境下的目标定位,精度能在10米以下,对NLoS下的目标定位,精度在20米以下。The drawbacks of localization algorithm for stationary or slow speed target in WSN were discussed,and new algorithm based on precise propagation time delay measurement was introduced.Mechanisms for time sampling and TOA measuring procedure were described in detail,which made the measurement error equivalent to CPU instruction cycle.The effect of NLoS was considered in location calculation procedure,which led to the adoption of variance weight method.Through simulation,the localization precision can reach 10m in LoS environment and 20m for NLoS.

关 键 词：定位 非视距传播 最小二乘 传感器网络 

分 类 号：TN929.5[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]