利用低频声压干涉谱的目标运动参数估计

针对水下目标被动定位技术中目标运动分析方法(TMA)及匹配场处理方法(MFP)需要较多的观测阵元、算法复杂的问题,通过分析浅海声压场的干涉特性,提出了一种适用于单水听器被动目标运动参数估计的新方法.近距离目标辐射的噪声通过浅海声场后,在时频域上形成干涉条纹.利用射线模型分析浅海声压场,推导出时频干涉条纹是双曲线簇型的.运用图像处理中边缘提取的常用方法——Hough变换,提取双曲线参数,可以得到运动目标的航速、航深及距离的信息.海试数据分析说明了其有效性.与一般的水下目标运动分析和匹配场处理技术相比,本文的方法具有声场分析和定位方法简单的优点.

Moving target parameter estimation using the spectrum interference of low frequency

Aiming at the complex algorithm and the need of more elements in the estimation of underwater moving target with TMA and MFD,this paper presents a method of target moving parameter estimation based on the analysis on spectrum interference in shallow water,which can be used in a single hydrophone.The noise radiated by the moving object will form interference after the multi-path channel.The hyperbola shaped interference pattern in time and frequency domain was derived from the ray model approximation of the acoustic field.By using the Hough transform,usually used for the edge detection in image processing,the hyperbola parameter was obtained to estimate the speed,depth and the distance of the moving object.The data from the sea trials shows the validity of this method.The acoustic field analysis and position algorithm of this method are simple compared with the general TMA and MFP.