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针对DV-Hop定位算法中在计算未知节点到锚节点距离时产生较大误差的问题,提出了一种改进的DV-Hop算法。改进算法对全网平均每跳距离和局部平均每跳距离进行了加权处理,得到了未知节点的平均每跳距离,又提出了一种改进的加权最小二乘法来得到未知节点的坐标,减小了节点的定位误差。仿真结果表明,在不需要增加额外的硬件设施的基础上,改进算法的定位精度相比于原算法明显提高。
Aimed at the problem of large error in DV-Hop algorithm when calculating the distance from unknown node to anchor node, an improved DV-Hop algorithm is proposed. The improved algorithm weighted the average distance per hop and the average distance per hop in the whole network. The average hop distance of unknown nodes was obtained. An improved weighted least square method was also proposed to obtain the coordinates of unknown nodes and reduce The positioning error of the node. The simulation results show that the proposed algorithm can improve the positioning accuracy obviously compared with the original algorithm without adding additional hardware facilities.