Exponential multiplication for sensitivity enhancement

When processing NMR data a window function, or apodization, is often applied to the raw data before fourier transformation to enhance the appearance of the spectrum. For one dimensional spectra an exponential multiplication is often used. This window function reduces the noise at the expense of resolution.

Processing: window functions

NMR data are often manipulated after acquisition to reduce artifacts or emphasize different aspects of the spectrum. One of the ways this is achieved is by multiplying the free induction decay (FID) by "window functions" to apodise the data. A typical application of a window function is to reduce the artifacts caused by incomplete sampling of the decaying NMR signal.