MATLAB Implementation and Performance Analysis of Duo-binary Turbo Codes in DVB-RCS Standard

We present a comprehensive MATLAB simulation framework implementing duo-binary Turbo codes according to the DVB-RCS (Digital Video Broadcasting - Return Channel via Satellite) standard for in-depth performance analysis. The implementation supports configurable code rates of 1/2 and 1/3, enabling systematic evaluation of system performance under different coding efficiencies. The simulation incorporates both MAP (Maximum A Posteriori) and Log-MAP decoding algorithms with efficient trellis processing, allowing comparative analysis of their performance characteristics under various channel conditions. Through extensive Monte Carlo simulations with additive white Gaussian noise (AWGNN) channel models, we obtain detailed Bit Error Rate (BER) and Frame Error Rate (FER) performance metrics. The modular code structure includes separate functions for encoding, interleaving, and decoding modules, facilitating easy parameter modification and algorithm testing. These simulation results provide valuable insights into DVB-RCS standard performance and serve as a reference for future research and development in satellite communication systems.