2011•Telecommunication EngineeringRequires access

Design and FPGA Implementation of a GMSK Modulator Circuit

Yafeng Yao

Abstract

The theory of GMSK(Gaussian Filtered Minimum Shift Keying) modulation is analysed and the circuit of modulator is implemented.The Gauss filter is implemented based on lookup table and the orthogonal modulation signal is generated by CORDIC(Coordinate Rotation Digital Computer)algorithm in GMSK modulator circuit,so the circuit is simple,adjustable and flexible.It is verified by FPGA and is successfully applied in TETRA communication systems.

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Available abstract

Key concepts: Minimum-shift keying, Field-programmable gate array, Modulation (music), Lookup table, Electronic engineering, CORDIC, Computer science, Quadrature amplitude modulation