Maximum entropy signal processing of two-dimensional NMR data

• Published in: Journal of magnetic resonance (1969) Vol. 64; no. 3; pp. 436 - 440
• Main Author: Hoch, Jeffrey C
• Format: Journal Article
• Language: English
• Published: Orlando, FL Elsevier Inc 01.10.1985; Academic Press
• Subjects: Exact sciences and technology; Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Physics; Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipments and techniques; Signal processing; Data processing; Method of maximum entropy; NMR spectrometry
• ISSN: 0022-2364; 1557-8968
• DOI: 10.1016/0022-2364(85)90106-4

The maximum entropy method (MEM) has been shown to yield one-dimensional NMR spectra with sensitivity and resolution superior to those obtained using the discrete Fourier transform (DFT) (S. Sibisi, J. Skilling, R. G. Brereton, E. D. Laue, and J. Staunton, Nature (London) 311, 446 (1984)). A property of MEM which has not been exploited in previous applications of the method to NMR is its ability to produce spectral estimates from short data records, free of the truncation artifacts which typify DFT spectra of zero-extended data records. This property holds significance for two-dimensional NMR spectroscopy, allowing reduction of the time necessary to acquire a two-dimensional data set. In this paper the application of MEM to two-dimensional NMR data is described. It is concluded that use of MEM in two-dimensional NMR studies can lead to sensitivity improvements, reduction of instrumental artifacts, and shortened data acquisition times. It is pointed out, however, that the nonlinear nature of MEM may render it unsuitable for certain applications in NMR spectroscopy.