Implementation of HARQ System Model Using Simulink

Implementation of a Hybrid Automatic Repeat Request (HARQ) system model using Simulink

The primary objective of this system model is to enhance reliability in wireless communications through successive automatic retransmission requests. The HARQ system design incorporates transmitter and receiver configurations, along with error detection and correction mechanisms. Using Simulink's block diagram environment, engineers can model the HARQ protocol stack through predefined communication blocks and custom S-functions that implement specific algorithms like Chase Combining or Incremental Redundancy. The simulation enables performance analysis under various channel conditions (e.g., SNR variations, fading scenarios) through BER vs. Eb/N0 curves and throughput measurements. This approach facilitates system design optimization by testing retransmission strategies, buffer management implementations, and acknowledgment handling logic, ultimately contributing to improved communication quality.