一种基于接收信号强度的源节点定位算法

摘要

提出一种基于接收信号强度的源节点定位算法,无需事先已知源节点的发射功率以及环境中的路径损耗指数.该算法首先对接收信号强度的路径损耗模型进行两次差分,消去与源节点发射功率相关的模型参数和路径损耗指数,然后利用最小二乘准则来估计源节点的位置.通过仿真数据评估该算法的定位精度,并与其他源节点定位算法进行比较.%We propose a source localization algorithm using received signal strength that does not need to know the source transmit power and the path-loss exponent.The algorithm first employs a double differential method to eliminate the source transmit power related parameter and path-loss exponent of the path-loss model.Then,least squares criteriaare used to estimate the location of the source node.The location accuracy of the algorithm is evaluated and compared with other source node localization algorithms by simulation data.