Fast GMSK modulation in DSP

The aim of the work is to analyze and realize a digital modulation scheme with a carrier wave suitable for narrowband satellite communication in a DSP system. The designed modulator will be used for the construction of a robust data communication system with nonstationary satellites. The modulator consists of a DSP processor, which produces baseband modulated signals and a digital quadrature up-converter to obtain output signals on the desired intermediate frequency. The described fast-data FIR filtering algorithm allows a very high speed modulation for data rates above 1 Mb/s with the current signal processor.