DECODING DEVICE

摘要

The invention relates a decoding device. The decoding device comprises a storage module that is used for storing channel information of various variable nodes in bipartite graph of low-density parity-check QC-LDPC codes and external information transmitted between various check nodes and various variable nodes of the QC-LDPC codes in the process of iterative decoding for the QC-LDPC, wherein the external information transmitted between any two conjoint check node C and variable node V of the QC-LDPC codes store on the same storage position of the storage module; an updating module that is used for computing the external information transmitted between various check nodes and various variable nodes of the QC-LDPC codes and writing the computed external information in the storing module to update the external information stored in the storage module by the way of dividing various check nodes of the QC-LDPC codes into multi-layer check nodes and layer-to-layer processing according to the channel information and the external information stored on the storage module in the process of each iterative decoding of the QC-LDPC codes, and is used for computing posterior probability information of various variable nodes of the QC-LDPC codes according to the channel information and the external information stored on the storage module and the computed external information; and a computing module that is used for computing decision value of various code bit of the QC-LDPC codes according to the computed posterior probability information of various variable nodes of the QC-LDPC codes. The decoding device can decrease the required storing resource and can reduce hardware implement complexity of the decoding device.