GMSK Modulation and Demodulation Implementation

This program implements GMSK modulation and demodulation functionality. The modulation section utilizes a lookup table approach, where pre-calculated phase and frequency offset values are stored in a table for efficient signal generation. The demodulation section employs 2-bit differential detection, which compares received signals with reference signals to recover original data bits through phase difference analysis.

The primary function of this program is to generate and decode GMSK signals. The modulation implementation involves creating a phase trajectory table that contains computed phase values for different input bit sequences, allowing for quick access during the modulation process. The demodulation algorithm calculates phase differences between consecutive symbol intervals using arctangent operations on in-phase and quadrature components, enabling robust data recovery even in noisy environments.

This program offers a convenient tool for performing GMSK modulation and demodulation operations. Its straightforward design makes it accessible for users with varying levels of familiarity with GMSK technology. The implementation includes key functions for signal generation, phase accumulation, and differential decoding, making it valuable for both academic research studying continuous phase modulation schemes and practical applications in wireless communication systems requiring bandwidth-efficient modulation.