Simulation of Turbo Codes Using 3GPP and LTE Interleavers

This study implements turbo code simulations using both 3GPP and LTE interleavers. We employed multiple decoding algorithms and conducted comprehensive performance comparisons. The implementation includes MATLAB-based simulation frameworks where interleaver parameters are configured according to 3GPP TS 36.212 specifications for LTE and standard 3GPP protocols. Key functions involve interleaver pattern generation using modulo operations and prime number-based addressing schemes. For decoding algorithms, we implemented both Log-MAP and Max-Log-MAP approaches with iterative decoding cycles, incorporating branch metric calculations and extrinsic information exchange between constituent decoders. Through comparative analysis of different decoding algorithms' performance metrics (including BER vs. SNR characteristics), we gained deeper insights into their respective advantages and limitations, providing valuable references for future research. Furthermore, we conducted detailed analysis of simulation results to better understand turbo code performance characteristics under various channel conditions. This research aims to provide foundational insights and directions for subsequent studies, thereby contributing to the advancement of turbo code technology.