LDPC codes based on MPEG algorithm for block fading channels

This paper presents a novel algorithm to design Root-LDPC codes based on improved PEG algorithm for block fading channels. The modified Progressive Edge-Growth (MPEG) algorithm is a PEG algorithm with Approximated Cycle Extrinsic Message Degree (ACE) metric, which is used to describe the connectivity of cycles. The approach can maximize the girth of the cycles, improve the connectivity of cycles. Simulation results demonstrate that the algorithm we proposed can achieve full diversity and significantly better code performance, suitable to different fading blocks. From medium to high SNR, the average required number of iterations can be decreased.