Patent ID: 9281839
Filing Date: 2016-03-08
CPC Classification: G11B,H03M,H04L

Claim Text:
1. A hard-decision decoding method comprising: simultaneously performing pre-update operations necessary for a first updating of a check node on data received by a decoder while loading the data received by the decoder to an input buffer; first updating the check node using a result obtained by the performing of pre-update operations after loading data corresponding to one codeword to the input buffer; and then, performing low-density parity check (LDPC) decoding using a result obtained by the first updating of the check node, wherein the first updating of the check node comprises obtaining sign information for information related to the updating of the first check node based on the result of the performing of pre-update operations necessary for the first updating of the check node, and determining information for the first updating of the check node using a value obtained by integrating the obtained sign information with default magnitude information, and wherein the obtaining sign information on the information about the first updating of the check node comprises determining a sign for the information on the first updating of the check node as a value obtained by performing an XOR operation of sign information of variable nodes connected to each check node and first information on a corresponding check node, wherein the first information comprises information on a result obtained by performing an XOR operation for each check node for sign information of all variable nodes connected to each check node during the performing of pre-update operations.