GMSK (Gaussian Minimum-Shift Keying) A modulation technique that is a variant of frequency shift keying (FSK) in which the signal is smoothed with a low-pass Gaussian filter before being placed on the carrier. This process reduces the spectral width and minimizes co-channel interference. GMSK is 74570c07.qxd  9/11/07  12:21 PM  Page 207  |