中文摘要：

提出了一种基于多参考接收站的到达时间差无源定位新算法. 首先将复杂的非线性时差定位方程组转化为一组关于辐射源位置的伪线性方程，运用加权最小二乘估计对伪线性方程组进行初始求解；然后利用初始解中各分量之间的相关性，通过加权最小二乘估计进一步求解得到一组改进的辐射源位置估计; 最后取这组估计值的平均值得到辐射源位置的最终估计. 仿真结果表明，该算法对近场和远场辐射源均具有较高的定位精度.

英文摘要：

A new algorithm based on multi-reference receivers for the passive location from time difference of arrival （TDOA） is proposed.The proposed algorithm first transforms the nonlinear TDOA equations into a set of pseudo-linear equations of the emitter position,and then the weighted least squares algorithm is applied to obtain the initial solution.By taking the relationship among the entries of the initial solution into account,we get a set of more accurate emitter position estimates via the weighted least squares algorithm with the obtained initial solution,the average of these estimates is then taken as the final estimate of the emitter position.Simulation results show that the proposed algorithm achieves high positioning accuracy for both near and far field emitters.