Automatic frequency control system for GMSK-modulated signals

摘要

An AFC system and method of detecting and compensating frequency drift in the carrier frequency of a Gaussian filtered Minimum Shift Keying (GMSK) signal by demodulated frequency compensated samples of the received signal and calculating a frequency compensation angle based upon the demodulated frequency compensation samples. The compensation angle is fed back to the frequency compensator and error detector and used to calculate the error signal.