无线传感器网络分布式迭代定位误差控制算法  

Error Control Algorithm of Distributed Localization in Wireless Sensor Networks

作　　者：汪晗 成昂轩 王坤 宋树伟 

机构地区：[1]解放军陆军工程大学,南京210007 [2]解放军94860部队,南京210018 [3]东部战区空军信息化处,南京210018

出　　处：《电子与信息学报》2018年第1期72-78,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61273047,61573376)

摘　　要：针对无线传感器网络分布式迭代定位中误差的传播和累积问题,该文首先分析了锚节点几何形状对定位误差的影响,提出了基于几何精度因子的误差控制算法,巧妙设计了加权策略,将锚节点几何形状对定位精度的影响以权值的形式定量体现在迭代定位过程中,在每一轮迭代中有效控制了误差的传递,进而提高了整个网络的分布式定位精度。与传统的最小二乘定位算法和基于轮数的误差控制算法进行了仿真比较,结果表明,基于几何精度因子的误差控制算法定位性能最优,网络定位精度分别提高了25%和15%。To soNe the problem of error propagation and accumulation in distributed multihop iterative localization process in wireless sensor networks, the localization error influence of anchor geometry is firstly analyzed and an error control algorithm based on Geometric Dilution Of Precision （GDOP） is proposed. By designing a delicate weighting scheme, the error magnification effect of geometry is quantitatively involved in terms of weight which effectively control error propagation in every iterative step and improve distributed localization accuracy of the whole network. The performance evaluation shows that, compared with classic iterative localization algorithm based on least squared estimation and another weighted algorithm based on iterative round, localization precision of GDOP weighted algorithm is improved by 25% and 15% respectively.

关 键 词：无线传感器网络 分布式定位 误差控制 几何精度因子 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]