Use of pseudo-random binary sequence (Gold, Kasami, etc.) in frequency hopped code-division multiple access (FH/CDMA)
There are many ways to do this. A simple method is to take the current value of the register (not just its output) as the carrier frequency selector. For instance, a (6,1) LFSR with 63 states can select between 63 different channels.

Other methods are based on cubic and quadratic congruence codes. I don't know much about them myself, but look up the papers by Titlebaum et al.