无线传感器网络DV-Hop定位算法

定位技术在无线传感器网络应用中起着非常重要的作用,也是具有挑战性的一种技术。近些年来,为了解决节点定位不精确的问题,很多定位算法被相继提出。在无需测距的定位算法中,DV-Hop定位算法利用节点之间的跳距估计传感器节点的位置,受到了越来越多学者的关注,但是这种定位算法本身也存在着一定的不足。针对DV-Hop定位算法的不足,提出了先对未知节点平均跳距进行加权处理,再用修正算法修正节点位置的改进算法。仿真结果显示,改进后的定位算法在一定程度上提高了节点的定位精度,具有很强的应用性。

Improvement of DV-Hop Localization Algorithm Based on Wireless Sensor Networks

Positioning technology is one of the basic and key technologies of wireless sensor network application;it's also a challenging technique. In recent years,in order to solve the problem of inaccurate location of nodes,many local-ization algorithms have been proposed. Among range-free algorithms,the hop distance between nodes was used to esti-mate the location of sensor nodes in DV-Hop localization algorithm. But this positioning also has the defects of low positioning accuracy. Aiming at the shortage of DV-Hop location algorithm,an improved algorithm is proposed to weight the average hop distance and then correct the location of the nodes. The simulation results show that the im-proved localization algorithm has higher performance and better effect.