摘要
针对无线传感器网络中DV-Hop定位算法其定位精度和覆盖率的不足,提出了一种按节点优先级进行定位并升级为新锚节点的改进算法。该算法是从第二轮次开始增加一次新锚节点广播,由各未知节点根据自身所收到的新旧锚节点广播的多少来确定其优先级,选择该轮次中优先级最高的节点按DV-Hop算法实现定位并升级为新锚节点,并在定位过程中利用加权最小二乘法降低了累计误差。选用Matlab进行相关仿真,结果表明改进算法在一定程度上提高了定位精度和覆盖率。
As a result of the shortage of localization accuracy and coverage for DV-Hop localization algorithm in the wireless sensor networks,an improved algorithm was proposed that located the nodes and updated them to new anchors in terms of the PRI.This algorithm adds a broadcast of the new anchor from second round,then confirms the PRI of unknown nodes according to the number of their received broadcasts from anchors,and chooses the node with the highest PRI and locates it by DV-Hop,and then updates it to a new anchor,and in the positioning process using weighted least squares method to reduce the cumulative error.Choosing Matlab as the emulator,it is proved that the improved algorithm has increased coverage rate and location precision effectively.
出处
《仪表技术与传感器》
CSCD
北大核心
2012年第4期97-99,共3页
Instrument Technique and Sensor
