SISO HARQ Implementation Program

In this project, we will develop a comprehensive program for SISO HARQ (Hybrid Automatic Repeat Request in single-antenna systems) focused on enhancing data transmission reliability and efficiency. The implementation will incorporate critical algorithms and techniques including channel coding (such as LDPC or turbo codes), modulation schemes (like QPSK or 16-QAM), channel estimation methods (using pilot symbols and LS/MMSE estimators), and feedback mechanisms for retransmission control. Our development approach involves creating modular MATLAB/Python functions for each component, ensuring proper interface design between the coding module, modulator/demodulator, and HARQ controller. The program will implement incremental redundancy HARQ with soft-combining techniques, where failed packets are retransmitted with additional parity bits rather than identical copies. To achieve optimal performance, we will implement adaptive modulation and coding schemes that dynamically adjust based on channel state information. The codebase will include SNR estimation algorithms, CRC error detection, and ARQ protocol state machines for handling acknowledgment/negative-acknowledgment signaling. Practical validation will be conducted through extensive simulation testing using Rayleigh fading channel models, bit error rate analysis, and throughput optimization. The final implementation aims to deliver superior performance and enhanced service quality for data transmission in single-antenna communication systems, with well-documented APIs for integration into larger communication frameworks.