Maximum entropy spectral reconstruction of nonuniformly sampled data

Mobli, Mehdi and Hoch, Jeffrey C. (2008) Maximum entropy spectral reconstruction of nonuniformly sampled data. Concepts in Magnetic Resonance Part A, 32A 6: 436-448. doi:10.1002/cmr.a.20126

Author Mobli, Mehdi
Hoch, Jeffrey C.
Title Maximum entropy spectral reconstruction of nonuniformly sampled data
Journal name Concepts in Magnetic Resonance Part A   Check publisher's open access policy
ISSN 1546-6086
Publication date 2008-11
Sub-type Article (original research)
DOI 10.1002/cmr.a.20126
Volume 32A
Issue 6
Start page 436
End page 448
Total pages 13
Editor D. D. Traficante
Place of publication Hoboken, New Jersey, U.S.A.
Publisher John Wiley & Sons
Language eng
Subject 060112 Structural Biology (incl. Macromolecular Modelling)
Abstract The time required to complete a multidimensional NMR experiment is directly proportional to the number of evolution times sampled in the indirect dimensions. A consequence when utilizing conventional methods of data acquisition and spectrum analysis is that resolution in the indirect dimensions is frequently sample-limited. The problem becomes more acute at very high magnetic fields, where increased chemical shift dispersion requires shorter time increments to avoid aliasing. It has long been recognized that a way to avoid this limitation is to utilize methods of spectrum analysis that do not require data to be sampled at uniform intervals, permitting the collection of data at long evolution times requisite for high resolution without requiring collection of data at all intervening multiples of the sampling interval. Several promising methods have evolved that are seemingly quite different, yet can be shown to yield similar results when applied to similar sampling strategies, emphasizing the importance of the choice of samples, regardless of the technique used to compute the spectrum. Maximum entropy (MaxEnt) reconstruction is a very general method for spectrum analysis of nonuniformly sampled data (NUS), and because it can be used with essentially arbitrary sampling strategies and makes no assumptions about the nature of the signal, it provides a convenient basis for exploring the influence of the choice of samples on spectral quality. In this article we use this versatility of MaxEnt reconstruction to compare different approaches to NUS in multidimensional NMR and suggest strategies for improving spectral quality by careful choice of sample times. 2008 Wiley Periodicals, Inc. Concepts Magn Reson Part A 32A: 436–448, 2008.
Keyword NMR
Projection reconstruction
Signal processing
Nonuniform sampling
Nonlinear sampling
Sparse sampling
Sampling artifacts
Maximum entropy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Institute for Molecular Bioscience - Publications
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Citation counts: TR Web of Science Citation Count  Cited 31 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 37 times in Scopus Article | Citations
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Created: Thu, 03 Sep 2009, 09:10:36 EST by Mr Andrew Martlew on behalf of Institute for Molecular Bioscience