基于STFT-Hough变换的目标运动分析

Target motion analysis based on the STFT-Hough transform

利用浅海干涉现象含有丰富目标运动信息的优点,提出了一种新的单水听器定位方法.从射线理论的声场模型出发,分析了单传感器接收信号在时频平面上的干涉现象.由于多途声线具备相干性,目标辐射的宽带噪声信号经过水下声场在接收点形成双曲线型的干涉条纹,提出了基于STFT-Hough变换的目标运动参数估计方法.对目标运动在深海和浅海2种情况的仿真数据与实验数据进行了分析和比较,说明STFT-Hough方法在目标通过时利用单水听器可以对目标进行运动分析.

Taking advantage of the interference phenomenon in shallow water, which carries aboundant information about target movement, a novel positioning method based on single hydrophone is proposed. The interference phenomenon in time and frequency domain is analyzed according to the acoustic field model of the ray theory. The wide band noise radiated from target forms the hyperbola interference pattern in the receiver after the acoustic multipath channel. A target motion analysis method is proposed based on the STFT-Hough transform. The target motion estimation is discussed both in the deep sea and shallow water situation, and the simulation and experiment result show that when the target travels through the target, the motion analysis can be done by single hydrophone using the STFT-Hough transform.