高精度递增式无线传感网络的定位算法  

High-precision incremental localization algorithm for wireless sensor network

作　　者：任枫轩[1] 

机构地区：[1]河南职业技术学院电气工程系,河南郑州450046

出　　处：《重庆邮电大学学报（自然科学版）》2013年第2期184-186,191,共4页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

摘　　要：递增式无线传感网络的定位算法可以有效降低锚节点密度,但由于其定位过程中会产生累积误差,不适用于高精度的定位场合。提出一种改进的加权最小二乘法,利用高斯权重法调节修正权值,得到最优权系数阵,以提高传感节点定位的可靠性和客观性。分析与仿真结果表明,依赖少量锚节点,改进的加权最小二乘法在无线传感网络中能够准确计算未知节点的坐标,并能显著提高网络中未知节点的定位率,加强了网络的健壮性与实用性。The high-precision incremental localization algorithm can reduce the density of anchor nodes effectively.Because of the accumulative errors generated in the process of localization,it is not fit for high-precision incremental localization.An improved method based on weight least square algorithm is proposed,using the Gaussian weighted method to adjust the weight,it can get the optimal weight matrix and improve the reliability and objectivity of the nodes localization.The analysis and simulation result show that relying on a few anchor nodes,the improved method based on weight least square algorithm can calculate the coordinate accurately and improve the localization proportion of the unknown nodes.Then the robustness and practical applicability of the wireless sensor network are enhanced.

关 键 词：递增式定位 高斯权重法 权系数阵 误差计算 

分 类 号：TN915[电子电信—通信与信息系统]