| 摘要 |
<p>A low density generator matrix code interpretation method involves filling L-k known bits in a received code sequence R and deleting the code symbol erased in R by a channel to get Re. The row corresponding to the code symbol erased from the transposed matrix of the LDGC generator matrix Gldgct by the channel is deleted to get Ge. Then, transposing Ge by row and column to get Ga (formula I), wherein A is a M rank down-triangle matrix and the corresponding relation transposed by column between Ge and Ga is stored. Gauss elimination method is utilized for Ga to get Gb, and the matrix according to the frontal L lines of Gb is identity matrix. At the same time, generating Re' according to the row transposing and row adding operation in the above mentioned Gauss elimination method to transpose and add the corresponding elements of Re. Then, obtaining It' according to the function G b X I' t = R' e and transposing It' by column to get It. Obtaining st according to the function G ldgct T (0 : L - 1,0 : L - 1) X I t = S t and deleting L-K known bits in st to get K bits information sequence.</p> |
