基于幅频矢量匹配的DV-hop定位算法优化

矿井巷道环境复杂多变,DV-hop算法应用于井下定位时效果不理想,因而,基于幅频矢量匹配对经典DVhop算法定位结果进行优化。利用经典DV-hop算法找到井下移动节点位置大致区域,将节点接收到的各锚节点信标信号的幅频矢量与数据库中煤矿巷道各点的幅频矢量相匹配,最终确定移动节点的精确位置信息。仿真结果表明:优化后的DV-hop算法,平均定位精度和定位覆盖率明显优于经典的DV-hop算法;随着锚节点数的增加,优化后的DV-hop算法的平均定位误差呈明显下降趋势。

The Optimization of DV-hop Localization Algorithm Based on Amplitude Vector Matching

The localization effect of coal mine wireless sensor network is not ideal because of the complicated environ- ment of roadway. This paper studied the amplitude vector matching technology to optimize the DV-hop algorithm. The classical DV hop algorithm was used to locate the area of the underground mobile node,and the amplitude vector matching algorithm was employed to match the specific amplitude vector of the location points in the area. The precise location information of mobile node was discovered based on the matching results. The simulation results indicate that the average localization accuracy and positioning coverage of the improved DV-hop algorithm is much higher than the classical DV hop algorithm,and the average positioning error of the improved DV hop algorithm presents an obviously downward trend with the increase of the number of nodes.