Processing the FID to Produce a Spectrum

Much development has occurred in numerical FT algorithms but they are largely based on the original algorithm. 

T2 relaxation processes mean that the information is not equally distributed throughout the time domain data. The T2 decay of the signal means that the contribution from the signal relative to the noise decreases as the time increases. Therefore weighting functions can be applied to the time domain data points in order to emphasise the parts of the FID where the signal preferentially resides. 

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