公开(公告)号：US20230341547A1

公开(公告)日：2023-10-26

申请号：US18120609

申请日：2023-03-13

Applicant: Harbin Engineering University

Inventor： Shengchun PIAO ,  Yunjia SHI ,  Junyuan GUO ,  Minghui ZHANG

IPC: G01S15/50 ,  G01S15/88 ,  G06F17/11

CPC classification number: G01S15/50 ,  G01S15/88 ,  G06F17/11

Abstract: The present disclosure belongs to the field of underwater target detection, and in particular, to a method for detecting a moving target based on spatial slices of transformed spatio-temporal frequency space. The method includes: segmenting a target radiated acoustic signal received by an M-element horizontal line array in an underwater acoustic environment with a low signal-to-noise ratio (SNR); performing N-point discrete Fourier transform (DFT) on the received signal on each array element in each period of time; performing frequency domain beamforming on an array signal after each section of DFT, and performing stacking after compensating a phase difference between arrays brought by an azimuth of each primitive element; performing coordinate transformation on a frequency-azimuth-time three-dimensional (3D) matrix space obtained; taking a slice from the obtained frequency-azimuth-time 3D space subjected to the coordinate transformation; and performing segmented Radon transform on the spatial slice obtained to detect the target.