Zhimin Xie

Jun 13, 2024 | mdpi.com | Haoran Wu |Zhimin Xie |Jingsong Tang |Fanyu Zhou

1. IntroductionSynthetic aperture sonar (SAS) [1,2,3] is a high-resolution acoustic imaging system mounted on an autonomous underwater vehicle (AUV), remote-operated vehicle (ROV), and unmanned undersea vehicle (UUV) platforms. It is widely applied in underwater topography mapping, small-target detection, and buried object detection [4,5,6,7].

Jul 27, 2023 | mdpi.com | Jiafeng Zhang |Jinsong Tang |Zhimin Xie |Guangli Cheng

Abstract:In existing imaging algorithms for wide-beam multiple-receiver synthetic aperture sonar (SAS) systems, the double-square-root (DSR) range history of each receiver is generally converted into the sum of a single-square-root (SSR) range history and an error term using displaced phase center aperture (DPCA) approximation. Therefore, before imaging, each receiver’s error term needs to be individually compensated in the azimuth frequency domain, which is computationally expensive.