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GLOSSARY OF TERMS USED IN TIME SERIES ANALYSIS
OF CARDIOVASCULAR DATA
FREQUENCY RESOLUTION

Minimum difference in frequency between two sinusoids which still allows to resolve two distinct peaks in the spectrum.

The frequency resolution is inversely proportional to the duration of the signal for the FFT spectrum; it depends on the order and on the signal-to-noise ratio for AR spectra. Techniques used to reduce the variance of the spectral estimate worsen the frequency resolution.

(PC 07-09-1999)

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