ENCODING METHOD AND TRANSMISSION DEVICE

摘要

Provided is an encoding method including: a step of extending a bidiagonal line of a basic matrix of m rows and n columns in the direction of a bidiagonal line according to an encoding ratio 1/k of the spread code (wherein k = 3, 4, 5, ..., k0) set in the LDPC code inspection matrix so as to constitute an extended matrix of the bidiagonal line structure; a step of moving a first non-zero element of the parity bit portion in the (i*m+1)-th row to the (n-m+1)-th column (wherein i = 1, 2, ..., k0-2) leftward along the row; a step of calculating the parity bit of the (n-m+1)-th column by using a first inspection relationship as a start factor; and a step of simultaneously calculating parity bits of a plurality of groups by the recursive encoding method by using the inspection relationship moved leftward to the (n-m+1)-th column.