A novel digital GFSK demodulator for zero-IF receiver

This paper presents a Gaussian frequency shift keying (GFSK) demodulator at zero intermediate frequency for wireless communication receiver. The demodulator based on phase information is simple and has high performance of noise resistance compared with the other demodulation methods. In addition, a novel detector by phase locating is put forward. The simulation results, both under Gaussian white noise environment and Rayleigh fading environment, show that the new detector has better ability of resisting the interference of noise.