WSN中基于不同跳距修正的改进DV-HOP定位算法

An improved DV-HOP algorithm based on different hop distances' revisions in WSN

介绍了无线传感器网络DV-HOP算法的定位原理以及不足,提出的改进算法在原算法的定位阶段,采用接收不同跳距的方式,提出了一个修正因子;在位置估计阶段定义了一个加权矩阵,采用加权最小二乘法进行位置坐标的计算。仿真结果显示,本文提出的算法较已有改进算法总体定位精度提高了约5%,较原算法提高了约10%。

DV-HOP algorithm of wireless sensor network was briefly introduced. For lack of the original DV- HOP, an improved method was proposed in this paper. In positioning stage, the new method adapts to receiv- ing different hop distances, and a related modifying factor was defined. In position estimation stage, a weighted matrix was proposed, and the weighted least square method was used to calculate the position coordinates. Simulation result shows, the positioning accuracy of the new method was raised 5% than the existing improved algorithm, and 10% than the original DV-HOP algorithm.