| 摘要 |
The present invention discloses a coding method, a coding device, a decoding method and a decoding device for low density generator matrix codes. Wherein the coding method includes: constructing the mother code set of the low density generator matrix code using P low density generator matrix codes of different code lengths at a code rate R 0 , wherein the mother code set of the low density generator matrix code has a uniform basic matrix G b uniform , R 0 = k b n b , where k b is the row number of the basic matrix and n b is the column number of the basic matrix; obtaining the length L of an intermediate variable according to the relationship between the length K of the information bit sequence to be coded in the mother code set of the low density generator matrix code and the length L of the intermediate variable; obtaining an expansion factor z k for processing the basic matrix using the length L of the intermediate variable and the row number k b of the basic matrix, and obtaining a generator matrix G ldgc by modifying and expanding the basic matrix using the expansion factor z k ; and coding the information bit sequence to be coded using a matrix G ldgc (1:L,1:N+L-K) comprised of L rows and the first N+L-K columns of the generator matrix. |
