Comparative Study of Passive Synthetic Aperture Algorithms in Underwater Acoustic Time-frequency Domain

Passive synthetic aperture technology is a method of obtaining phase differences by moving a small aperture short array to correlate sound signals received at different positions, and synthesizing a large aperture array horizontally to achieve high-resolution azimuth estimation At present, research on passive synthetic aperture technology for underwater acoustics both domestically and internationally is mostly focused on the time or frequency domain. This article models the classic time-frequency domain passive synthetic aperture algorithm and compares and analyzes the differences between time-domain synthetic aperture and frequency-domain synthetic aperture techniques through simulation, which can provide reference for the selection and use of passive synthetic aperture algorithms.