MIMO 2x2 16QAM SoIC + Turbo Iterative Detection Simulink Link

This Simulink model implements a comprehensive MIMO communication link featuring a 2x2 antenna configuration with 16QAM modulation. The system employs convolutional coding for forward error correction, where the encoder typically uses polynomial generators to create redundant bits. At the receiver, the detection process implements an iterative turbo scheme that combines soft interference cancellation (SoIC) with A Posteriori Probability (APP) decoding. The SoIC algorithm progressively cancels interference between spatial streams using soft symbol estimates, while the APP decoder employs the BCJR algorithm or its approximations to compute likelihood ratios. This iterative detection approach significantly enhances link performance by effectively reducing bit error rates through multiple processing cycles where soft information is exchanged between the interference canceller and channel decoder. The implementation demonstrates key signal processing techniques for improving reliability in wireless communication systems with spatial multiplexing.