说明：  LDPC研究者MacKay提供的校验矩阵H及对应的生成矩阵G，其中H行重为6，列重为3，行数252，列数504.
(LDPC researchers MacKay, the calibration matrix H and the corresponding generator matrix G, H which re-6, series of three, the lines 252, 504 Columns.)