Patent ID: 8266512
Filing Date: 2012-09-11
Classification: H03M,H04L

Abstract:
1. A method of transmitting a signal by a signal transmission apparatus in a communication system using a Hybrid Automatic Repeat reQuest (HARQ) scheme, the method comprising: generating a codeword vector by encoding an information vector by using a first parity check matrix of Low Density Parity Check (LDPC) codes; generating a transmission vector by processing the codeword vector; and transmitting the transmission vector, wherein, when the first parity check matrix comprises a plurality of square matrix columns, each square matrix has a size of L×L, the first parity check matrix is one of p parity check matrixes stored in the signal transmission apparatus, the p parity check matrixes support different numbers of information vector square matrix columns, and each of the numbers of information vector square matrix columns indicates the number of square matrix columns corresponding to the information vector from among the plurality of square matrix columns, and wherein, the first parity check matrix is a parity check matrix supporting the number of information vector square matrix columns determined by using the length of the information vector and the value L from the p parity check matrixes, and the value L is determined by using p and the length of the information vector.