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• W2075408049 abstract "A modified robust two-dimensional compressive sensing algorithm for reconstruction of sparse time-frequency representation (TFR) is proposed. The ambiguity function domain is assumed to be the domain of observations. The two-dimensional Fourier bases are used to linearly relate the observations to the sparse TFR, in lieu of the Wigner distribution. We assume that a set of available samples in the ambiguity domain is heavily corrupted by an impulsive type of noise. Consequently, the problem of sparse TFR reconstruction cannot be tackled using standard compressive sensing optimization algorithms. We introduce a two-dimensional L-statistics based modification into the transform domain representation. It provides suitable initial conditions that will produce efficient convergence of the reconstruction algorithm. This approach applies sorting and weighting operations to discard an expected amount of samples corrupted by noise. The remaining samples serve as observations used in sparse reconstruction of the time-frequency signal representation. The efficiency of the proposed approach is demonstrated on numerical examples that comprise both cases of monocomponent and multicomponent signals." @default.
• W2075408049 created "2016-06-24" @default.
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• W2075408049 date "2013-05-31" @default.
• W2075408049 modified "2023-10-02" @default.
• W2075408049 title "Compressive sensing for sparse time-frequency representation of nonstationary signals in the presence of impulsive noise" @default.
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• W2075408049 doi "https://doi.org/10.1117/12.2015916" @default.
• W2075408049 hasPublicationYear "2013" @default.
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