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Compressed NMR : Combining compressive sampling and pure shift NMR techniques
Author(s) -
Aguilar Juan A.,
Kenwright Alan M.
Publication year - 2018
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.4705
Subject(s) - compressed sensing , chemistry , sampling (signal processing) , nyquist–shannon sampling theorem , nonuniform sampling , spectral line , nmr spectra database , undersampling , analytical chemistry (journal) , nuclear magnetic resonance , nuclear magnetic resonance spectroscopy , computational physics , algorithm , physics , optics , computer science , telecommunications , mathematical analysis , stereochemistry , mathematics , quantum mechanics , chromatography , detector , quantization (signal processing)
Historically, the resolution of multidimensional nuclear magnetic resonance (NMR) has been orders of magnitude lower than the intrinsic resolution that NMR spectrometers are capable of producing. The slowness of Nyquist sampling as well as the existence of signals as multiplets instead of singlets have been two of the main reasons for this underperformance. Fortunately, two compressive techniques have appeared that can overcome these limitations. Compressive sensing, also known as compressed sampling (CS), avoids the first limitation by exploiting the compressibility of typical NMR spectra, thus allowing sampling at sub‐Nyquist rates, and pure shift techniques eliminate the second issue “compressing” multiplets into singlets. This paper explores the possibilities and challenges presented by this combination (compressed NMR). First, a description of the CS framework is given, followed by a description of the importance of combining it with the right pure shift experiment. Second, examples of compressed NMR spectra and how they can be combined with covariance methods will be shown.