Enhanced SAR Image Formation via a Modified Omega-K Algorithm | Zendy

Min-Seok Kang | Zendy

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Enhanced SAR Image Formation via a Modified Omega-K Algorithm

Author(s) -

Min-Seok Kang

Publication year - 2025

Publication title -

ieee access

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 0.587

H-Index - 127

eISSN - 2169-3536

DOI - 10.1109/access.2025.3611350

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

In this paper, a high-resolution synthetic aperture radar (SAR) focusing technique is proposed based on a modified omega-K algorithm in case of long synthetic aperture time. The proposed algorithm includes three stages. First, a modified reference function multiply is applied to two-dimensional frequency data to perform a coarse range cell migration. Second, the residual non-stationary phase error related to a range-azimuth coupling is compensated using a range block processing after implementing the interpolation process based on a newly devised kernel function. Finally, the high-precision SAR focusing is carried out via the azimuth focusing function, which enables us to realize a range variant motion compensation. The experimental results with simulated and real measured SAR data are presented to validate the feasibility and superiority of the proposed method.

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