直升机目标被动声跟踪算法及其仿真研究

提出了包含多普勒频移和声传播时间延迟的接收信号模型，提出了在直升机目标做匀速直线运动的条件下，将声基阵获得的测向信息与多普勒频移信息融合，估计目标运动参数的算法，并用蒙特卡罗方法分析了该算法的估计精度；仿真结果表明该算法可实现较高的估计精度，测距精度满足实用要求，最后研究了应用该算法的自适应跟踪问题。

The Research on the Algorithm and Simulation of Passive Acoustic Tracking of a Helicopter

In this paper, a model of received signals containing Doppler shift and time delay in sound propagation is presented. Under the condition that a helicopter is moving at a constant speed, this paper develops a new method to estimate the moving range and speed of a target by fusing the information of measured directions and Doppler shift. The estimation precision of the algorithm is analyzed using Monte Carlo method. Finally, the adaptive tactics applying the algorithm in tracking a target is presented. The simulation results have proved its efficiency.