摘要
为了提高无线传感器网络的节点定位性能,对当前定位算法的思想进行分析,提出了一种接收信号强度指示的无线传感器定位算法。首先将接收信号强度指示引入到质心定位中,通过加权因子描述不同锚节点对质心坐标的影响,然后对信号传播路径损耗环境参数的测量过程进行完善,以获得更加准确的接收信号强度指示值,最后采用仿真实验分析其性能。实验结果表明,本文算法较好的解决了定位过程存在一些不足,有效提高节点的定位准确性,且获得比其它定位算法更小的错误,实际应用范围更加广泛。
In order to improve the localization accuracy in wireless sensor networks based on analyzing the traditional centroid localization algorithm principle and insufficient,this paper proposed a node localization algorithm for wireless sensor network by using received signal strength indicator. firstly transforms the RSSI as the weight and introduced to the centroid localization algorithm,the weighted factor is used to reflect the influence of different reference node to the center mass,and measurement of environmental parameters for the signal propagation path loss is modified to improve more accurate RSSI value,finally the simulation analysis is used to test the performance. The results show that,the proposed algorithm has improved the localization accuracy of nodes,and can obtain smaller than other algorithm positioning error,and the practical application range is more extensive.
出处
《激光杂志》
北大核心
2015年第9期141-143,共3页
Laser Journal
基金
河南省科技厅基础与前沿技术研究项目(142300410339)
河南省科技厅基础与前沿研究计划项目(132300410276)
关键词
接收信号强度指示
质心定位算法
无线传感器网络
传播路径损耗模型
Received signal strength indicator
Centroid localization algorithm
Wireless sensor networks
Propagation path loss model
