多通信半径的无线传感器网络DV-Hop定位算法

为了实现无线传感器网络中基于无需测距DV-Hop定位算法的高精度定位，改进基于2、3通信半径的DV-Hop节点定位算法，并利用最小均方差准则改进计算平均每跳距离的公式，在最佳指数值下，修正锚节点平均每跳距离。MATLAB仿真结果表明，改进的算法在随机分布环境能提高节点定位精度；在最佳指数值下，进一步提升节点定位精度；在锚节点人工部署环境下，大大提高节点定位精度。改进的算法实现高精度定位同时，不需要增加网络泛洪次数和硬件成本。

MULTI COMMUNICATION RANGES DV-HOP LOCALIZATION ALGORITHM FOR WIRELESS SENSOR NETWORK

In order to realize high precision positioning of DV-Hop localization algorithm based on rang-free in wire?less sensor network,this paper improved the DV-Hop localization algorithm based on 2 or 3 communication radius, and improved the average per hop distance by the least mean square error criterion. The anchor node average per hop distance is repaired in the best index value. MATLAB simulation results show that the improved algorithm can improve the localization accuracy in randomly distributed environment,further enhance the localization accuracy in the best index,and greatly improve localization accuracy in the anchor node deploying artificial environment. The improved algorithm can achieve high precision positioning without increasing the number of flood and the cost in the network.