Abstract
ABSTRACT A scheme is proposed for the radial-velocity estimation of moving targets in multi-channel SAR systems. A moving target consists of multiple pixels in SAR images, generally. The radial velocity of each pixel can be estimated from its interferometric phase. The radial velocity of the moving target is then obtained by averaging the radial-velocity estimates of its multiple pixels. In the averaging, the weight of each radial-velocity estimate is designed to minimize the mean-square-error (MSE) between the estimate and the truth. This scheme has a higher estimation accuracy than those conventional schemes, which take the radial-velocity estimate of one pixel as the final radial-velocity estimate of the moving target. The experimental results of both simulated and real data show the effectiveness of this scheme.
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