一种改进的基于定向天线的移动传感器网络定位算法

摘要

针对在无线传感器网络定位中,由于全向天线信号受环境影响而造成定位误差较大的问题,提出了一种改进的基于定向天线的移动无线传感器网络定位算法(DADLP),使用一个带有定向天线的移动锚节点广播位置信息,未知节点接收到信号后,将接收功率平均分为若干等级,缩小定位估计区域.仿真结果表明DADLP算法相对于Ssu、BLI、GGDI和RROI移动锚节点算法提高了定位精度,并且在非规则环境下有更低的平均定位误差.%To solve the signal from an omni-directional antenna of mobile wireless sensor networks is affected by environment noise caused a big localization error problem,an improved localization algorithm(DADLP)using a mobile anchor node equipped with a direction antenna was proposed.The received power of sensor node is divided into several levels to reduce the estimated area and improve the localization accuracy.The simulation results show that DADLP has higher accuracy and lower average localization error than Ssu's algorithm,BLI algorithm,GGDI algorithm and RROI algorithm in irregular environment.