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• W2949171286 abstract "We develop sub-Nyquist sampling systems for analog signals comprised of several, possibly overlapping, finite duration pulses with unknown shapes and time positions. Efficient sampling schemes when either the pulse shape or the locations of the pulses are known have been previously developed. To the best of our knowledge, stable and low-rate sampling strategies for continuous signals that are superpositions of unknown pulses without knowledge of the pulse locations have not been derived. The goal in this paper is to fill this gap. We propose a multichannel scheme based on Gabor frames that exploits the sparsity of signals in time and enables sampling multipulse signals at sub-Nyquist rates. Moreover, if the signal is additionally essentially multiband, then the sampling scheme can be adapted to lower the sampling rate without knowing the band locations. We show that, with proper preprocessing, the necessary Gabor coefficients, can be recovered from the samples using standard methods of compressed sensing. In addition, we provide error estimates on the reconstruction and analyze the proposed architecture in the presence of noise." @default.
• W2949171286 created "2019-06-27" @default.
• W2949171286 creator A5005913897 @default.
• W2949171286 creator A5089948554 @default.
• W2949171286 date "2010-10-15" @default.
• W2949171286 modified "2023-09-27" @default.
• W2949171286 title "Sub-Nyquist Sampling of Short Pulses" @default.
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• W2949171286 hasPublicationYear "2010" @default.
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