Energy demodulation scheme for mixing GMSK signal in time-frequency domain

A new demodulation scheme was presented for two component of mixing GMSK signal in time-frequency domain. The proposed algorithm is based on the difference equation of the mixing signal and nonlinear energy operators. The first derivative of the mixtures is achieved according to the principle of the GMSK signal, and the amplitude of every component takes on the character of slow variation and contains modulated codes, which can be estimated employing energy operator and differential energy operator. Simulation results demonstrated the efficiency of the scheme.