title: NMR signal enhancement via a new time-frequency transform.
abstract: In this paper, a reliable method to reduce the noise from nuclear magnetic resonance (NMR) signals using a recently developed linear critically sampled time-frequency transform is proposed. In addition to its low computational requirements, this transform has many theoretical advantages that make it a good candidate for NMR signal enhancement. NMR signals in the transform domain are concentrated in a few coefficients while the noise is well distributed. Performing a thresholding technique in the transform domain, therefore, significantly enhances the signal. A comparison with other signal enhancement techniques shows that this technique has a superior performance, thus confirming the theoretical expectations.
authors.affiliation: Research Institute, King Fahd University of Petroleum and Minerals, Dhahrna, Saudi Arabia. osamaa@kfupm.edu.sa
authors.forename: O A
authors.initials: OA
authors.lastname: Ahmed
authors.forename: M M
authors.initials: MM
authors.lastname: Fahmy
mesh_terms: D000465:Algorithms; D005583:Fourier Analysis; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013996:Time and Motion Studies