Journal
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Volume 19, Issue -, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2022.3143874
Keywords
Synthetic aperture radar; Interferometry; Radar tracking; Target tracking; Radar imaging; Imaging; Bandwidth; Ground moving target detection (GMTD); single-channel; subband interferometry (SBI); synthetic aperture radar (SAR)
Categories
Funding
- National Natural Science Foundation of China (NSFC) [61771142]
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This letter proposes a subband interferometry-based algorithm for single-channel SAR ground moving target detection, which utilizes the phase reversal characteristic of moving targets in the interferometric phase image for detection. Real airborne SAR data confirm the feasibility and effectiveness of the algorithm.
Traditional synthetic aperture radar (SAR) ground moving target detection (GMTD) technology mostly relies on multichannel data, which requires higher complexity of the radar system. This letter proposes a subband interferometry (SBI)-based algorithm for single-channel SAR GMTD. First, the echo signal is divided into high and low bands containing overlapping parts before the imaging process, then the subbands are imaged separately, and the SBI algorithm is used to achieve the interferometric phase of the subbands. It can be observed that the moving target has the characteristics of phase reversal in the interferometric phase image, and graphics operations such as median filtering or morphological processing can be used to detect the moving target. In this letter, the relationship between the subbands coincidence, the correlation coefficient (CC) of SBI, and the phase of moving target after SBI processing are derived. The real airborne SAR data verify the feasibility and effectiveness of the algorithm.
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