CC-QC-LDPC code construction method and decoding device

Abstract

The invention provides a CC-QC-LDPC code construction method and a decoding device. A memory comprises 4 groups 12, 13, 14, 15, which respectively store specified information, each iteration of a sub-decoder 11 comprises decoding states in the same number as the matrix rows J in a sub-code check matrix, each decoding state updates a layer, z check nodes of each layer are processed in G phases, each decoding state comprises G decoding phases, z/G check nodes carry out parallel processing in each decoding phase, and the z/G check nodes and associated variable nodes are updated. The CC-QC-LDPC code construction method provided by the invention has the beneficial effects that the length of the LDPC code is effectively and efficiently expanded, the decoding accuracy is greatly improved, the storage demand is reduced, the complexity and the error rate of the decoding device are relatively lower than that of other similar decoding devices, and the overall performance is excellent. 一种CC‑QC‑LDPC码的构建方法及译码装置，存储器包含4个分组12、13、14、15，分别存储指定的信息，子译码器11每次迭代包括与子码校验矩阵中子矩阵行数J相同数量的译码状态，每个译码状态更新一个层，每一层的z个校验节点被分为G个阶段处理，每个译码状态包括G个译码阶段，每个译码阶段内有z/G个校验节点并行处理并且有z/G个校验节点和相关联的变量节点被更新。实施本发明的有益效果是，LDPC码的长度得到了有效而又高效的扩展，译码准确度有了大幅度提高，降低了存储的需求量，译码装置的复杂度与误码率相近的其他编码相比较低并且有较高的吞吐率，整体性能优越。