Differential Space-Time Coding and Decoding with Multiple Modulation Schemes

This document presents a differential space-time coding and decoding program designed for multiple modulation schemes including BPSK, QPSK, and 16QAM. The implementation features a 2x2 MIMO configuration with proper simulation validation. The core algorithm employs differential encoding techniques that eliminate the need for channel state information at the receiver, making it particularly suitable for fast-fading environments. Key implementation aspects include: - Modulation mapping functions that convert binary data to constellation points - Space-time block coding matrices for 2-transmit antenna configuration - Differential encoding using previous transmitted symbols as references - Maximum likelihood decoding algorithm for signal detection The program undergoes comprehensive simulation testing across various channel conditions and signal-to-noise ratios. Performance metrics including bit error rate curves demonstrate correct functionality and reliability. This verified implementation provides a solid foundation for communication experiments and application development, offering robust support for research and practical wireless communication projects.