Encoding method, decoding method, and communication apparatus

By designing the target basis matrix and the set of lifting values, determining the first lifting value and the translation value, the encoding and decoding performance problem of LDPC codes under long code lengths is solved, and performance improvement is achieved.

WO2026124322A1 Publication Date: 2026-06-18HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HUAWEI TECH CO LTD
Filing Date
2025-12-03
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

As code lengths increase in the future, the encoding and decoding performance of existing LDPC codes will suffer from the problems of increased bit length due to shortened encoding and the destruction of basis graph integrity, resulting in poor decoding performance.

⚗Method used

By designing the target basis matrix and the lift value set, the first lift value and translation value corresponding to the target basis matrix are determined, and the translation value in the second lift value set is used to determine the parity check matrix. This avoids shortening the information length too much, which would damage the integrity of the basis graph and improve the encoding and decoding performance.

🎯Benefits of technology

When faced with long code lengths, effectively determining appropriate shift values ​​can prevent damage to the base map and improve encoding and decoding performance.

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Abstract

Provided in the present application are an encoding method, a decoding method, and a communication apparatus. In the methods, on the basis of existing lifting value sets, a target lifting value set applicable to scenarios in which there are more code lengths is designed. After obtaining a lifting value corresponding to a target base matrix, a first device or a second device may effectively obtain, on the basis of the target lifting value set, a shift value corresponding to the target base matrix, and then uses the lifting value and shift value, which correspond to the target base matrix, to determine a check matrix, so as to implement encoding or decoding. In addition, by using the target lifting value set in the present application, the stability of shortened bits in a rate matching process can also be improved, and the decoding performance can be prevented from being affected by problems such as damage to the integrity of a base graph caused by the excessive length of shortened information. Therefore, the methods can support more mother code lengths, and can improve the performance of channel encoding and decoding.
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