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A novel ground moving target imaging algorithm based on 2-D velocity search is proposed in high resolution synthetic aperture radar. In the range-Doppler domain, a range velocity with low accuracy is obtained via the response length along the range direction of the target's range migration. Then, an accurate range velocity is determined in the velocity search for the best range migration correction...
It is known that the co-prime array should be more attractive for estimating the direction of arrival (DOA) of multiple sources because it can obtain a high system degrees of freedom (DOFs). In this paper, we proposed a vectorized conjugate augmented method which can further increase the DOFs of the array by exploiting the sum co-array based on real-valued sources. Meanwhile, to obtain more available...
A synthetic aperture radar (SAR) moving target is normally shifted from its correct azimuth location in the image due to its radial motion. To address this problem a novel ground moving targets relocation method is proposed in this paper via co-prime arrays. The co-prime arrays can obtain much more virtual elements with a smaller inter-element spacing than the physical elements, which will achieve...
A new Doppler ambiguity resolver (DAR) is proposed for ground moving targets of synthetic aperture radar. After range migration correction in range–Doppler domain based on a static target, it is found that the absolute value and the sign of Doppler ambiguity integer can be determined according to the range blur and the inclination direction of a moving target signal response, respectively. The range...
This paper proposes a new approach for the detection and location of multiple ground moving targets in the synthetic aperture radar (SAR) system. For multiple targets with various parameters in the scene with weak static clutter, it is difficult to process all the targets simultaneously, such as the estimation and compensation of Doppler frequency centroid, the estimation of Doppler chirp rate and...
Clutter suppression is a key problem for multi-channel SAR ground moving target indication (GMTI), which is sensitive to the correlation among channels. For real multichannel SAR-GMTI system, there are inevitably slight differences in the frequency response and antenna patterns among channels. Therefore, the correlation of channels will be worsen and channel balancing is a crucial step to obtain a...
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