FPGA Implementation of GMSK Modulation
Fengping An · Microcomputer Information · 2007
GMSK is a spectrum-efficient modulation signal used widely in the FH communication system. In this paper, the design theory of GMSK modulator is analyzed and an improved digital implementation structure is obtained. Then this structure is imple-mented on FPGA. Simulation result show that GMSK signal generated by the digital implementation structure has nice PSD and eye pattern. Also, the effect of quadrature phase error and amplitude imbalance is avoided.