Patent ID: 9331715
Filing Date: 2016-05-03
CPC Classification: H03M,H04B,H04L

Claim Text:
1. A reception apparatus comprising: a receiver, which, in operation, receives low-density parity-check (LDPC) encoded data generated by using a parity check matrix in which “n” number of (where n is an integer equal to or greater than 1) parity check equation groups including a plurality of parity check polynomials are arranged, each of the plurality of parity check polynomials satisfying zero; a log likelihood ratio generator, which, in operation, generates a log likelihood ratio for each bit of the received LDPC encoded data; and a decoder, which, in operation, decodes the log likelihood ratio for each bit of the LDPC encoded data based on the parity check matrix, wherein where, in Equation 1, X 1 (D), X 2 (D), . . . , X q−1 (D) are polynomial representations of data X 1 , X 2 , . . . , X q−1 respectively, P(D) is a polynomial representation of parity P, A Xr,k (D) is a term of X r (D) in the parity check polynomial for “k=i mod g” at time i where the coding rate is (r−1)/r, and B k (D) is a term of P(D) in the parity check polynomial for “k=i mod g” at time i, where “i mod g” is a remainder after dividing i by g.