Gaussian frequency shift keying (GFSK) is a promising digital modulation scheme. The design of simple and high-performance receivers for GFSK systems is a challenging task. In this letter, we develop an optimized differential GFSK demodulator and investigate the phase wrapping issue in its implementation. Simulation results show bit-error-rate (BER) performance improvement in comparison with conventional differential demodulators in both AWGN and flat fading channels. We also compare our proposed demodulator with other existing alternatives in terms of BER performance.
Bibliographical noteFunding Information:
This work was supported by DOCOMO USA Labs. Parts of the results in this paper have been presented at the 43rd Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, November 2009.
- Gaussian frequency shift keying (GFSK)
- differential demodulation
- phase wrapping