Abstract
A method and apparatus for encoding a low density generator matrix code, and a decoding method and apparatus are provided. The P code rate is R 0 (R 0 = k b / n b , k b is the number of rows in the basic matrix, and n b is the number of columns in the basic matrix), and the length of the code Low-density generator matrix codes of different density construct a mother code collection of low-density generation matrix codes having a unified basic matrix G b uniform, and information bit sequences waiting for encoding in the mother code collection of low-density generation matrix codes An expansion factor z that obtains the length L of the intermediate variable according to the relationship between the length K and the length L of the intermediate variable, and processes the basic matrix using the length L of the intermediate variable and the number of rows k b of the basic matrix. k , and correction and expansion of the basic matrix using the expansion factor z k to obtain the generation matrix G ldgc and L rows of the generation matrix And the matrix G ldgc (1: L, 1: N + LK) assembled by the previous N + L−K columns, and encodes an information bit sequence waiting for encoding.
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