基于平面阵与双侧回波的SAS运动估计方法

doi:10.12305/j.issn.1001-506X.2026.04.01

Abstract

Abstract:

Based on the assumptions of stop-and-go and flat seafloor, the motion estimation method using dual-sided echo can achieve a closed-form solution with good performance under certain conditions. However, these assumptions have strong limitations and the performance declines under non-flat seafloor situation. To address this issue, this paper adopts a scheme with planar array transducer on both sides. It first estimates the direction of the seafloor echo using a high resolution direction of arrival method and then combines this information with the time delay estimation of the bilateral redundant phase center, using an improved closed-form method and modified nonlinear least squares（NLLS） for motion compensation. In addition, the impact of the stop-and-go assumption on the proposed method is also analyzed. The simulation results show that the proposed methods have a wider adaptability and can perform well even under non-flat seafloor conditions. After proper correction, the negative impact of the stop-and-go assumption can also be significantly reduced.

Key words: synthetic aperture sonar(SAS), motion estimation, redundant phase center(RPC), dual-sided echo, planar array

CLC Number:

TN 911.7

Jince WU, Yong HUANG. SAS motion estimation method based on planar array and dual-sided echo[J]. Systems Engineering and Electronics, 2026, 48(4): 1103-1111.

Figures/Tables 11

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SAS motion estimation method based on planar array and dual-sided echo

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