基于多通信半径的加权DV-Hop定位算法

DV-Hop定位算法是无线传感器网络中一种常用的基于非测距的定位技术，该算法使用平均跳距表示实际距离，在实际应用中造成很大的误差和节点能耗。为此，分析了加权DV-HOP 定位算法，并在加权算法基础上，引入多通信半径广播方法细化节点间的跳数，最后提出了一种基于加权DV-HOP的改进型RWDV-Hop定位算法。仿真结果证明，加权DV-HOP在定位精度上比DV-HOP算法提高了7.3%，改进型RWDV-HOP在定位精度上比加权DV-HOP算法提高了6.7%。

An Improving DV-Hop Algorithm based on Multi Communication Radius

DV-Hop is one of the most common used localization algorithms in range-free algorithms. This algorithm uses hop distance instead of the actual distance,which results in localization error and large energy consumption. The weighted DV-Hop algorithm is analyzed,and an improved algorithm based on the weighted DV-Hop is proposed. The improved algorithm broadcasts the data using multi communication radius and refines the hops to reduce the lo-cation error. The average hop distance depended on the neighbor nodes and the communication radius is corrected in this new algorithm. The simulation shows that the improvement of the improved algorithm on the positioning preci-sion is 6.7%.