GFSK (Gaussian Frequency-Shift Keying) A type of frequency-shift keying (FSK) that uses a Gauss- ian filter to smooth out frequency deviations by limiting their spectral width in a process generically known as pulse shaping. GSFK is used by Bluetooth and DECT systems. See also Bluetooth, DECT, FSK, Gaussian noise, pulse shaping, and spectral width. |