Support Recovery With Orthogonal Matching Pursuit in the Presence of Noise

Support recovery of sparse signals from compressed linear measurements is a fundamental problem in compressed sensing (CS). In this article, we study the orthogonal matching pursuit (OMP) algorithm for the recovery of support under noise. We consider two signal-to-noise ratio (SNR) settings: 1) the...

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Veröffentlicht in:IEEE transactions on signal processing Jg. 63; H. 21; S. 5868 - 5877
1. Verfasser: Wang, Jian
Format: Journal Article
Sprache:Englisch
Veröffentlicht: IEEE 01.11.2015
Schlagworte:
Algorithms
Compressed sensing
Compressed sensing (CS)
Constants
Error analysis
Matching
Matching pursuit algorithms
minimum-to-average ratio (MAR)
Noise
Noise measurement
orthogonal matching pursuit (OMP)
Recovery
restricted isometry property (RIP)
Signal processing algorithms
Signal to noise ratio
signal-to-noise ratio (SNR)
Sparse matrices
Transaction processing
ISSN:1053-587X, 1941-0476
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Zusammenfassung:Support recovery of sparse signals from compressed linear measurements is a fundamental problem in compressed sensing (CS). In this article, we study the orthogonal matching pursuit (OMP) algorithm for the recovery of support under noise. We consider two signal-to-noise ratio (SNR) settings: 1) the SNR depends on the sparsity level K of input signals, and 2) the SNR is an absolute constant independent of K. For the first setting, we establish necessary and sufficient conditions for the exact support recovery with OMP, expressed as lower bounds on the SNR. Our results indicate that in order to ensure the exact support recovery of all K-sparse signals with the OMP algorithm, the SNR must at least scale linearly with the sparsity level K. In the second setting, since the necessary condition on the SNR is not fulfilled, the exact support recovery with OMP is impossible. However, our analysis shows that recovery with an arbitrarily small but constant fraction of errors is possible with the OMP algorithm. This result may be useful for some practical applications where obtaining some large fraction of support positions is adequate.
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ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2015.2468676