Difference between revisions of "Fourier Transform"
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The signal output from an NMR instrument is called a Free Induction Decay (FID) and looks like this: | The signal output from an NMR instrument is called a Free Induction Decay (FID) and looks like this: | ||
| − | This signal gives intensity of the signal versus time. A fourier transform algorithm is applied to the signal which converts it to intensity versus frequency. | + | This signal gives intensity of the signal versus time. A fourier transform algorithm is applied to the signal which converts it to intensity versus frequency: |
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| + | [[File:proton NMR of ethanol.png|500px]] | ||
Revision as of 07:55, 15 April 2021
Fourier Transform does mathematically what our ears do physically: resolve a signal into component frequencies. FT is a method to determine the simple wave components of a mixed wave. The method is theoretically based on calculus, but is actually carried out computationally using numerical analysis.
The signal output from an NMR instrument is called a Free Induction Decay (FID) and looks like this:
This signal gives intensity of the signal versus time. A fourier transform algorithm is applied to the signal which converts it to intensity versus frequency:
