基于混合APIT的可见光室内定位算法

Indoor location algorithm of visible light based on mixed APIT

传统的APIT算法对未知节点是否在三角形内易出现误判现象,导致算法定位精度低。本文提出一种基于混合APIT的可见光室内定位算法,该算法利用三角形的面积关系判断未知节点的初始位置,然后利用内切圆进一步缩小了未知节点可能所在的区域,并利用混合质心定位算法,得出未知节点的估计位置。该算法减少了传统的APIT算法误判的现象,提高了定位精度。仿真结果表明,该定位算法与传统的APIT定位算法相比,定位误差低。

It is so prone to misjudge whether the unknown nodes are in the triangle that the location error of the traditional APIT algorithm is low.In the paper,it proposes an indoor location algorithm of visible light based on mixed APIT.It uses triangle area relation to judge the initial location of unknown nodes,and then uses internal tangential circle to further reduce the area where unknown nodes may be located.Finally,the estimation position of unknown nodes is obtained by using the mixed centroid positioning algorithm.The algorithm reduces the misjudgments of the traditional APIT algorithm and improves the positioning accuracy.The simulation results show that the localization error of the indoor location algorithm based on mixed APIT is lower compared with the traditional APIT localization algorithm.