Data processing

From NMR Wiki

Nowadays NMR data is recorded in the time domain (TD) in the form of free induction decay traces. Once acquired, time domain data often needs to be converted to the frequency the domain (FD).

Fourier transformation is the most frequently used method for such conversion.

Term NMR data processing applies to the transformation of the TD data to FD and additional steps that might be taked before and after the transformation.

Some of the steps taken prior to the TD→FD transformation are:

• zero filling: i.e. appending a certain number of zero values to the end of each fid; once Fourier-transformed such data has more points per unit frequency - and therefore appears smoother.
• apodization (e.g. multiplication of data vectors with exponential, sine-bell, etc. functions)