GMSK Modulation and Demodulation Using Viterbi Algorithm

This article explores the implementation of GMSK modulation and demodulation using the Viterbi algorithm, validated through BER performance curves from simulation results. We begin by detailing the fundamental principles of GMSK modulation/demodulation and the core concepts of the Viterbi algorithm. The discussion then focuses on applying the Viterbi algorithm to GMSK systems, analyzing its advantages and limitations in terms of computational complexity and error correction capability. We demonstrate practical implementation aspects including MATLAB code for generating Gaussian filters, trellis diagram construction, and path metric calculations. The article further explains simulation methodologies using MATLAB's Communications Toolbox, covering waveform generation, AWGN channel modeling, and BER analysis through Monte Carlo simulations. Finally, we summarize research findings and propose potential future directions for enhancing algorithm efficiency and exploring hardware implementation approaches.