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In this paper, a new system called minimum redundancy linear array SAR (MRLA-SAR) is proposed. Using multiple complex images formed by multiple antennas with a special configuration, MRLA-SAR can not only suppress the stationary clutter, but also locate and image both slowly and fast moving targets accurately. Numerical experiments are also presented to demonstrate the effectiveness of MRLA-SAR
In the velocity synthetic aperture radar (VSAR), multiple moving targets in image domain may be superposed in the same range-azimuth cell and, therefore, may not be easily distinguished from each other. This phenomenon is named "velocity layover" of multiple moving targets in this paper. A super-resolution spectrum estimation method, i.e., spatial projection processing, is used to solve...
In conventional methods of velocity estimation of moving targets using single antenna SAR, if the Doppler-shift exceeds PRF/2, in other words, if the radial velocity of a fast moving target exceeds the "blind velocity", the radial velocity estimation ambiguity will occur. In this paper, a novel method is proposed to detect and image fast moving targets. Specially, this method can accurately...
In this paper, a new system called non-uniform linear antenna array SAR (NULA-SAR for short) is proposed. Using multiple complex images formed by multiple antennas with special configuration, NULA-SAR can not only suppress the stationary clutter, but also locate and image both slowly and fast moving targets accurately. Numerical experiments are presented to demonstrate the effectiveness of NULA-SAR
To improve the ability of suppressing clutter as well as locating the moving targets without any ambiguity, dual-speed velocity SAR (DS-VSAR) is proposed in this paper. In DS-VSAR system, the platform flies with two different specified speeds in the imaging time duration. Multiple complex images are formed by multiple receiving antennas and transmitted into velocity-images (V-images), where moving...
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