Performance Analysis of LDPC Codes in 802.16e Systems

In 802.16e systems, through simulation analysis of LDPC code performance in AWGN and Rayleigh fading channels, we can better understand the effectiveness of these coding schemes. Specifically, we conducted detailed research and analysis of LDPC encoding and decoding programs. The implementation includes key algorithms such as belief propagation for decoding and matrix-based encoding operations following the 802.16e standard specifications. During the encoding and decoding process, we considered various parameters and conditions, including different code rates, iteration numbers, and signal-to-noise ratios, to evaluate LDPC code performance across different channel environments. The simulation framework incorporates channel modeling functions for both AWGN and Rayleigh fading conditions, with performance metrics calculated through bit error rate (BER) and frame error rate (FER) analysis. Through these studies, we can draw comprehensive conclusions and provide valuable references and recommendations for related system design and optimization.