基于线谱瞬时频率估计的被动声纳目标运动分析

摘要

针对被动声纳探测目标,提出了一种基于线谱瞬时频率估计的目标定位跟踪算法.该算法通过利用声纳探测目标的跟踪波束信息,建立高精度瞬时频率跟踪提取与多特征联合的目标定位跟踪模型,完成对目标高精度多普勒频移信息的实时提取.基于多特征观测方程,实现了对目标的定位与跟踪.仿真实验和海上试验结果表明:该算法可在观测平台不机动情况下,完成对目标的快速定位与跟踪;在相同平台机动条件下,相比传统纯方位算法,该算法的要素解算性能更加稳定,解算收敛时间缩短约4 min,进一步增强了工程适用性.%A new target motion analysis method based on line-spectrum instantaneous frequency estimation for passive sonar feature information is studied.The proposed algorithm combines high-accuracy instantaneous frequency tracking with target motion analysis using the target feature information to extract high-accuracy Doppler frequency and calculate the motion parameters of targets quickly.Computer simulation and sea-trial results show that the method can be used to solve the target motion analysis problem without own ship maneuver.It can reduce the calculation convergence time more than four minutes under the same maneuvering conditions.