sparse signal representations

TSP
2008

124views more TSP 2008»

Dictionary Preconditioning for Greedy Algorithms

14 years 1 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 7 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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