一种基于TOA的定位优化算法

提出了一种在非视距环境下,当基站处于不良布站情况,即基站不能如蜂窝状包围住移动台时,测电波到达时间(TOA)定位算法的一种优化方法。其主要思想为先利用三基站相交线定位方法测得一个移动台的初始值坐标,再通过初始值坐标,确定基站选择和坐标优化机制,选择两两基站最优搭配,利用最优基站的圆周线相交定位方法,经过多次测量,消除NLOS误差对测量值的影响,最终确定出移动台坐标。此方法计算量小,结构简单,经验证,此方法比原来方法有更高的测量精度。

An Optimized Localization Algorithm Based on TOA

A time of arrival （TOA） optimizing method is proposed for the case when the base stations can not surround the mobile station as honeycomb and are also under the influence of non-line-of-sight （NLOS） condition.The main idea of the method is to find an initial position by intersected lines of position （LOPs） first,and then select the most adaptive base stations by the optimizing method,in which LOPs are used again with the adaptive base stations.After several times of measuring,NLOS error will be decreased and the final position will be obtained.This method is simple and can save the computation time.Comparing with other method,it achieves higher accuracy.