一种APIT改进定位算法研究

Research on an APIT Positioning Algorithm

APIT改进定位算法结合网格扫描方法,未知节点一旦被定位就充当起信标节点的功能,向周围邻居发送自己的估计坐标信息,把已经定位的未知节点与信标节点同等对待。通过MATLAB进行仿真,实验证明,该算法不仅减小了定位误差,并且提高了定位覆盖率,表明APIT改进定位算法有一定优势。

The APIT positioning algorithm uses grid scanning method. An unknown node is regard as beacon node once located, and it will send its own coordinate to neighbors, so that the located unknown node can be equal treated with beacon nodes. We make a simulation with MATLAB and the experiments show that this algorithm not only reduces the positioning error, but also improves the localization coverage, which indicates that the APIT posi-tioning algorithm has certain advantages.