一种利用多运动接收站的时差定位算法

New TDOA localization algorithm using multiple moving receivers

提出了一种利用多运动接收站的两级加权最小二乘时差定位算法.首先引入中间变量,将高度非线性的多时刻时差定位方程转化为伪线性方程,并用加权最小二乘估计对伪线性方程组进行初始求解;然后根据辐射源位置和中间变量之间的关系,利用进一步加权最小二乘估计来优化初始定位结果,同时在理论上分析了所提算法的有效性.仿真结果表明,该算法具有较好的定位性能.

This paper presents a new two-stage weighted least squares （WLS） estimator for source localization using time differences of arrival （TDOA） measured by multiple moving receivers. The first stage transforms the highly nonlinear TDOA equations into a set of pseudo-linear ones by introducing intermediate variables and then uses the WLS estimator to obtain the initial estimation. The second stage refines the initial emitter location estimate obtained in the first stage by exploiting the relationship between the emitter position and the intermediate variables. The efficiency of the proposed algorithm is theoretically analyzed. Simulation shows the good performance of the proposed method.