Design and Implementation of FPGA for Digital GMSK Modulation
XU Li-shen · Radio and communications technology · 2014
Aiming at the characteristics of GMSK modulation,a digital modulation of GMSK is presented.The modulation of GMSK is cut off and quantified by using matlab simulation tool in order to generate a modulation lookup which is stored in FPGA,and the digital modulation is achieved by using lookup.The digital modulation overcomes the shortcoming of analog modulation by which the coherent demodulation can't be implemented and the flexibility of system design can't be improved.By analyzing the spectral characteristic of GMSK modulation signal and the baseband waveform of receiving end signal,the validity and feasibility of digital GMSK modulation are proved.