Patent ID: 9654316
Date: 2017-05-16
CPC Classifications: H03M,H04L

Claim:
1. A transmission method for transmitting a codeword generated based on a quasi-cyclic low-density parity-check coding scheme including a repeat-accumulate quasi-cyclic low-density parity-check coding scheme, the codeword consisting of N quasi-cyclic blocks, the quasi-cyclic blocks each consisting of Q bits, the transmission method comprising the steps of: applying, using a bit interleaver, a bit permutation to the bits of the codeword; generating, using a generator, a plurality of constellation blocks from the permuted bits of the codeword, each of the plurality of constellation blocks being generated from G×M bits; applying, using a constellation block interleaver, a constellation block permutation to the constellation blocks; and transmitting, using a transmission unit, the permuted constellation blocks, wherein the codeword is divided into N/M sections each consisting of M quasi-cyclic blocks, the constellation blocks are each associated with one of the sections, the bit permutation is adapted such that the constellation blocks each consist of G×M bits from M different quasi-cyclic blocks of the associated section, and the constellation block permutation is equivalent to writing the constellation blocks row by row into a matrix with R rows and (Q/(k×G)) columns and reading out the constellation blocks column by column from the matrix, where R is k×(N/M), and k is a positive integer.