MATLAB Implementation of 2x1 MIMO System with BPSK Modulation and STTC Coding

This implementation demonstrates a 2x1 MIMO (Multiple-Input Multiple-Output) system using Binary Phase Shift Keying (BPSK) modulation combined with Space-Time Trellis Coding (STTC), also known as the Alamouti encoding method. The MATLAB code implements the complete transmission chain including signal generation, STTC encoding, channel simulation, and maximum likelihood decoding at the receiver. The Alamouti scheme provides transmit diversity by encoding two consecutive symbols across two transmit antennas and time slots, enabling simple linear decoding at the receiver. The implementation includes key functions for BPSK constellation mapping, Alamouti code matrix generation, channel coefficient simulation, and symbol detection using minimum Euclidean distance criteria. Simulation results demonstrate excellent performance with significant improvement in bit error rate compared to single-antenna systems, showcasing the system's high reliability and stability in transmission quality.