Compressed sensing and best term approximation
Authors:
Albert Cohen, Wolfgang Dahmen and Ronald DeVore
Journal:
J. Amer. Math. Soc. 22 (2009), 211231
MSC (2000):
Primary 94A12, 94A15, 68P30, 41A46, 15A52
Published electronically:
July 31, 2008
MathSciNet review:
2449058
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Additional Information
Abstract: Compressed sensing is a new concept in signal processing where one seeks to minimize the number of measurements to be taken from signals while still retaining the information necessary to approximate them well. The ideas have their origins in certain abstract results from functional analysis and approximation theory by Kashin but were recently brought into the forefront by the work of Candès, Romberg, and Tao and of Donoho who constructed concrete algorithms and showed their promise in application. There remain several fundamental questions on both the theoretical and practical sides of compressed sensing. This paper is primarily concerned with one of these theoretical issues revolving around just how well compressed sensing can approximate a given signal from a given budget of fixed linear measurements, as compared to adaptive linear measurements. More precisely, we consider discrete signals , allocate linear measurements of , and we describe the range of for which these measurements encode enough information to recover in the sense of to the accuracy of best term approximation. We also consider the problem of having such accuracy only with high probability.
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Additional Information
Albert Cohen
Affiliation:
Laboratoire JacquesLouis Lions, Université Pierre et Marie Curie 175, rue du Chevaleret, 75013 Paris, France
Email:
cohen@ann.jussieu.fr
Wolfgang Dahmen
Affiliation:
Institut für Geometrie und Praktische Mathematik, RWTH Aachen, Templergraben 55, D52056 Aachen, Germany
Email:
dahmen@igpm.rwthaachen.de
Ronald DeVore
Affiliation:
Industrial Mathematics Institute, University of South Carolina, Columbia, South Carolina 29208
Email:
devore@math.sc.edu
DOI:
http://dx.doi.org/10.1090/S0894034708006103
PII:
S 08940347(08)006103
Keywords:
Compressed sensing,
best $k$term approximation,
instance optimal decoders,
Gelfand width,
null space property,
restricted isometry property,
random matrices,
Gaussian and Bernoulli ensembles,
$\ell _1$minimization,
mixed instance optimality,
instance optimality in probability.
Received by editor(s):
July 26, 2006
Published electronically:
July 31, 2008
Additional Notes:
This research was supported by the Office of Naval Research Contracts ONRN0s00140310051, ONR/DEPSCoR N000140310675 and ONR/DEPSCoR N000140010470; DARPA Grant N660010612001; the Army Research Office Contract DAAD 190210028; the AFOSR Contract UF/USAF F496200310381; the NSF contracts DMS0221642 and DMS0200187; the FrenchGerman PROCOPE contract 11418YB; and by the European Community’s Human Potential Programme under contract HPRNCT20200286, BREAKING COMPLEXITY
Article copyright:
© Copyright 2008
American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication.
