Deterministic multidimensional nonuniform gap sampling

Bradley Worley, Robert Powers

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Born from empirical observations in nonuniformly sampled multidimensional NMR data relating to gaps between sampled points, the Poisson-gap sampling method has enjoyed widespread use in biomolecular NMR. While the majority of nonuniform sampling schemes are fully randomly drawn from probability densities that vary over a Nyquist grid, the Poisson-gap scheme employs constrained random deviates to minimize the gaps between sampled grid points. We describe a deterministic gap sampling method, based on the average behavior of Poisson-gap sampling, which performs comparably to its random counterpart with the additional benefit of completely deterministic behavior. We also introduce a general algorithm for multidimensional nonuniform sampling based on a gap equation, and apply it to yield a deterministic sampling scheme that combines burst-mode sampling features with those of Poisson-gap schemes. Finally, we derive a relationship between stochastic gap equations and the expectation value of their sampling probability densities.

Original languageEnglish (US)
Pages (from-to)19-26
Number of pages8
JournalJournal of Magnetic Resonance
Volume261
DOIs
StatePublished - Dec 1 2015

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Keywords

  • Deterministic sampling
  • NMR
  • NUS
  • Poisson-gap

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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