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Passive radar systems operate by exploiting signals of opportunity that are designed for other applications, such as broadcasting, communications, and satellite navigation. Passive radars have recently attracted attention in military applications, mainly because of their covertness, low-cost implementation, and no requirement of signal emissions [1], [2]. Whereas the primary use of passive radars...
In this paper, a two-stage image formation approach, which combines the Fourier and sparsity-based reconstruction strategies, is proposed to effectively process the multi-static synthetic aperture radar (SAR) data. This method exploits the block sparsity of the Fourier sampling patterns which contain a number of generally disjoint subbands in the two-dimensional spatial frequency domain. The Nyquist...
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