Fig. 6: Four-channel signal decomposition using the gain matrix.
From: A digital twin for parallel liquid-state nuclear magnetic resonance spectroscopy
a, c Show the simulated coupled spectra. b, d Illustrate the corresponding decomposed spectra. The ’signal' is the primary signal, and the 'interf.' is the interfering coupled signal. The four 1H channels and four 13C channels experienced synchronous pulses. Four samples were used, with each sample assigned one 1H and one 13C nucleus. A hard pulse with a duration of 20 μs was applied to each nucleus, and the average radio frequency amplitude was adjusted to 12.5kHz to achieve a flip angle of 90°.
