一种参考节点不确定的无线传感器网络定位方法

A Wireless Sensor Network Positioning Method with Uncertain Reference Nodes

为解决当前无线传感器网络定位技术参考节点位置不确定导致的误差累积问题,提出了一种参考节点不确定的无线传感器网络定位方法。考虑了参考节点的位置不确定性,通过精度稀释法对参考节点的位置不确定性进行量化处理。运用改进的弹簧质点法(Spring Mass Method,SMM)获取修正后的邻近设备位置和目标设备位置,给出了距离误差和位置误差的平衡点,实现了距离误差和位置误差之间的有效平衡。通过Matlab进行仿真分析,搭建物理平台对所提方法的实际定位性能进行实验验证。实验结果表明,所提方法在不同节点部署方式下均具有良好的位置定位精度,并具有良好的噪声鲁棒性,与传统的SMM相比,能有效降低定位误差,具有明显的性能优势。

To solve the problem of error accumulation caused by the uncertainty of the reference node position in the current wireless sensor network positioning technology,a wireless sensor network positioning method with an uncertain reference node is proposed.Firstly,the uncertainty of the position of the reference node is considered,and the uncertainty of the position of the reference node is quantified by the precision dilution method.Secondly,the modified spring mass point method is used to obtain the corrected position of the neighboring equipment and the target equipment,and the balance point of the distance error and the position error is given,realizing the effective balance between the distance error and the position error.Finally,the simulation analysis is performed on the Matlab platform,and a physical platform is built to verify the actual positioning performance of the proposed method.Experimental results show that the proposed method has good positioning accuracy under different node deployment modes,and has good noise robustness.Compared with the traditional spring-mass method,the proposed method can effectively reduce the positioning error and has an obvious performance advantage.