两种距离无关的WSN定位算法仿真及分析

Simulation and Analysis of two Range-Free WSN Localization Algorithm

为了分析无线传感器网络(WSN)中几种距离无关的定位算法的定位性能,通过设定在相同的定位区域内随机分布不同的节点密度及信标节点比例的传感器节点,对DV-Hop、质心定位两种算法进行定位误差的计算及仿真。通过对MATLAB仿真结果的分析得出DV-Hop算法的网络节点密度越大,定位精度越高,而质心算法信标节点比例越高,定位精度越高从而导致网络成本增加算法特点。最后得出在同等条件下实现定位,采用DV-Hop算法可得到较好定位性能的结论。

In order to analyze the localization performance of the several range-independent localization algorithm about wireless sensor network（WSN）,the localization error of both DV-Hop algorithm and centroid algorithm is calculated and simulated by setting the the different node density and the different ratio of beacon nodes distributed randomly in the same localization region.Through the analysis of MATLAB simulation results to further validate the characteristics that the higher network node density,the higher positioning accuracy about DV-Hop algorithm,and the higher proportion of beacon node the higher accuracy of centroid algorithm which resulting in increased network cost.Finally,the conclusion about using DV-Hop localization algorithm can obtain the better performance under the same conditions of location is drawn.