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An essential part of SAR processing is the estimation of the Doppler parameters of the received data-the Doppler centroid and the Doppler frequency rate. This paper proposes a Doppler parameters estimation technique for squint SAR imaging, where the estimation of the Doppler frequency rate is dependent on that of the Doppler centroid. It estimates the Doppler centroid based on the relationship of...
For forward-squint synthetic aperture radar (SAR) imaging, the determination of the Doppler centroid is indispensable. With an analysis of the characteristics of the range cell migration in forward-squint mode, a Doppler centroid estimation technique is proposed, which utilizes the Radon transform to extract the skew angle information from the shape of the target response in the range-compressed image...
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