Abstract:Gaussian minimum shift keying (GMSK) is a constant envelope modulation with continuous phase, and achieves good power-bandwidth efficiency. According to the basic principle of GMSK signal, the GMSK demodulation based on Viterbi algorithm and its performance analysis are presented by describing the signal state and the computation of the branch metric in trellis diagram. Simulation result indicates that the proposed algorithm possesses good performance of anti-noise and anti-multipath. And it can obtain 7 dB gains under the same condition of bit error rate of 10－3 than that of the 2-bits differential demodulation.
