基于TDOA的非同步照射辐射源定位算法

针对现有基于信号到达时差（TDOA）的定位算法难以适应辐射源信号非同步到达的定位问题，提出了一种新的非同步照射辐射源定位算法。该算法利用脉冲样本图外推各站辐射源脉冲的到达时间（TOA）序列，进而计算TDOA序列（TDOAs），解决了非同步照射引起的TDOA计算困难问题，通过两条双曲线的渐近线交点求取初值，通过牛顿迭代法实现对辐射源位置的估计。最后给出的数值仿真结果验证了该方法的有效性。

An Asynchronous Radiation Emitter Location Method Based on TDOA

As the existing location method based on TDOA can’t adapt to asynchronous arrival location problem of emitter signal, a new asynchronous radiation emitter location algorithm based on TDOA is proposed in this paper. The pulse pattern is used to extrapolate the TOA sequences (TOAs) of the emitter pulses received by observation platforms, and then the TDOA sequences (TDOAs) are obtained, thus solving the TDOA calculating difficulty brought by asynchronous radiation. The emitter position is got based on Newton iterative algorithm by using the initial value obtained by intersection of two hyperbolas’ asymptotes. Simulation results verify the effectiveness of the proposed algorithm.