✦ LIBER ✦

CORRECTIONS FOR FREQUENCY, AMPLITUDE AND PHASE IN A FAST FOURIER TRANSFORM OF A HARMONIC SIGNAL

✍ Scribed by Xie Ming; Ding Kang

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 389 KB
Volume: 10
Category: Article
ISSN: 0888-3270
DOI: 10.1006/mssp.1996.0015

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✦ Synopsis

This paper advances a new method which can correct the spectrum peak value of the rms spectrum in order to decrease the errors that exist when the spectral line is not on the peak. The authors first use the barycentre of spectral lines in the main lobe to obtain the coordinate of the spectrum peak. By this means the accurate frequency, amplitude and phase of the spectrum peak are obtained.

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A new model-free method is presented that automatically corrects for phase shifts, frequency shifts, and additional lineshape distortions of one single resonance peak across a series of in vivo NMR spectra. All separate phase and frequency variations are quickly and directly derived from the common