基于DV-Hop的加权改进定位算法

Modified Localization Algorithm Based on DV-Hop

无线传感器网络集合多项前沿技术己经越来越受到学术界的关注,其中对DV-Hop定位算法的研究中,定位算法对平均跳距的估算准确度控制了定位的精确度。一般情况下的DV-Hop定位算法只思考了其中几个锚节点估算出来的平均性跳距,则导致定位误差增大。为了增加节点定位精确度,在DV-Hop定位算法基础上提出了加权改进算法,首先得出全网络估算的平均间距,然后采用加权平均处理法取代一般算法中的平均处理法。最后通过MATLAB仿真实验表明:在同样的环境中,加权平均法能够有效地减少平均法所造成的定位误差,增加定位的精确度。

Wireless Sensor Network （WSN） brings together many cutting-edge technologies that have become mo~ and more concerned by the academic community. In the study of DV-Hop localization algorithm, the localization algorithm has the advantages of the precisions for the estimation of the average jump distance. In general, the DV-Hop localization algorithm only considers the average jump distance estimated by several anchor nodes which leads to the increase of the positioning errors. In order to increase the accuracy of node location a weighted algorithm is proposed on the basis of DV-Hop localization algorithm. Firstly the average spacing of the whole network is obtained and then the weighted average method is used to replace the average processing method of the general algorithm. Finally, the MATLAB simulation experiment shows that in the same environment, the weighted average method can effectively reduce the positioning error caused by the averaging method, and increase the accuracy of localization.