基于Radon变换的合成孔径声纳多普勒中心估计

Doppler centroid estimation of SAS based on Radon transform

不准确的多普勒中心估计会显著降低合成孔径声纳图像质量。基于多普勒中心与斜视角直接相关的事实,提出了一种使用Radon变换估计多普勒中心的方法。仿真结果说明,此方法是有效的,可用于低信噪比、大斜视角情况下的多普勒中心估计。

The inaccurate Doppler centroid estimation can evidently degrade the quality of SAS image. Based on the fact that the Doppler centroid and the squint angle are directly related, this paper proposes a Doppler centroid estimation technique by using Radon transform. The algorithm is effective and applicable for the Doppler centroid estimation in the highly squinted scenes with low signal-tonoise ratio.