sparse signal representations

TSP
2008

124views more TSP 2008»

Dictionary Preconditioning for Greedy Algorithms

14 years 4 months ago

This article introduces the concept of sensing dictionaries. It presents an alteration of greedy algorithms like thresholding or (Orthogonal) Matching Pursuit which improves their...

Karin Schnass, Pierre Vandergheynst

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ICASSP
2008
IEEE

95views Signal Processing» more ICASSP 2008»

Average case analysis of sparse recovery with thresholding : New bounds based on average dictionary coherence

14 years 11 months ago

Download infoscience.epfl.ch

This paper analyzes the performance of the simple thresholding algorithm for sparse signal representations. In particular, in order to be more realistic we introduce a new probabi...

Mohammad Golbabaee, Pierre Vandergheynst

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