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In this paper we propose a novel STAP method based on the structured sparse recovery of radar clutter spectrum. Besides the spatial-temporal sparsity, we introduce the structured property of the clutter spectrum in STAP based on the pattern of 2-dimensional clutter spectrum. An elliptical clustering model is given to describe the structured sparsity, based on which a novel sparse recovery STAP method...
Using only one training symbol, a novel cross ambiguity function (CAF) based integer frequency offset (IFO) estimator for OFDM systems is proposed. From the energy distribution characteristics of the ideal CAF, an energy-detection based metric is obtained. By designing a training symbol whose ambiguity function (AF) is a valid approximation of the ideal thumbtack-type AF, a high-accuracy and full-range...
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