Decoding Method, Decoding Apparatus, and Communications System

摘要

The present invention provides a decoding method, a decoding apparatus, and a communications system, which implement multi-level coding in a manner combining soft-decision error correction coding and hard-decision error correction coding, implement multi-level decoding in a manner combining soft-decision error correction decoding and hard-decision error correction decoding, so as to integrate advantages of the two manners: compared with a manner in which soft-decision error correction coding and decoding are performed on multiple levels, a manner in which soft-decision error correction coding and decoding are performed on only one level reduces system complexity and resource overhead; and performing hard-decision error correction coding and decoding on other levels on a basis of performing soft-decision error correction coding and decoding on one level ensures gain performance, thereby meeting a gain requirement of a high-speed optical transmission system.

主权项

1. A decoding apparatus, comprising a one or more computers including a non-transitory computer-readable medium storing program units executable by the one or more computers, the units including:
a primary demapping unit; a soft-decision error correction decoder; a first demapping unit; a first deinterleaver; a first hard-decision error correction decoder; and an output unit; wherein the primary demapping unit is configured to demap information received by the decoding apparatus, and output obtained soft information of a first-level component to the soft-decision error correction decoder; wherein the soft-decision error correction decoder is configured to perform decoding according to the received soft information of the first-level component, and output the decoded soft information of the first-level component; wherein the first demapping unit is configured to demap, by using the soft information of the first-level component that is output by the soft-decision error correction decoder as prior information, the information received by the decoding apparatus, and wherein the first demapping unit is further configured to output, to the first deinterleaver, hard information of a second-level component that is obtained by means of the demapping; wherein the first deinterleaver is configured to deinterleave the received hard information of the second-level component, and wherein the first deinterleaver is further configured to output the deinterleaved hard information of the second-level component to the first hard-decision error correction decoder; wherein the first hard-decision error correction decoder is configured to decode the received hard information of the second-level component, and output the decoded hard information of the second-level component; wherein the output unit is configured to output hard information of the first-level component that is obtained after performing demapping on the output of the soft-decision error correction decoder, and output the hard information of the second-level component that is output by the first hard-decision error correction decoder; and wherein the first-level component is a less significant bit relative to the second-level component.