Diversity Performance Analysis of 2x2 MIMO Systems with BPSK Modulation

This experiment conducts diversity performance comparison for 2x2 MIMO systems utilizing BPSK modulation. The simulation computes and compares Bit Error Rate (BER) performance across three configurations: 2x1 (MISO), 1x2 (SIMO), and 2x2 (MIMO) systems. In the 2x1 MISO configuration, the implementation involves single-antenna transmission with dual-antenna reception, employing transmit diversity schemes like Alamouti coding to enhance signal reliability. The 1x2 SIMO system utilizes single-antenna reception with dual-antenna transmission, implementing receive diversity through maximal ratio combining (MRC) algorithm that optimally combines received signals. The 2x2 MIMO configuration employs simultaneous dual-antenna transmission and reception, leveraging spatial multiplexing and diversity gains through channel matrix operations and zero-forcing/MMSE detection techniques. By comparing BER performance across these configurations, the analysis quantitatively assesses performance differentials under varying system architectures. The evaluation framework incorporates Monte Carlo simulations with AWGN channel modeling, providing critical insights for selecting optimal system configurations based on specific application requirements and channel conditions. The code implementation includes SNR sweeping, BER calculation loops, and performance visualization using semilogarithmic plots for clear comparative analysis.