Patent · US Active

Base parity-check matrices for LDPC codes that have subsets of orthogonal rows

US11309917B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

Huawei Technologies Co., Ltd. · CN

Inventors

Balázs Matuz · Gilching, DE
Gianluigi Liva · Munich, DE
Onurcan ISCAN · Munich, DE
Ronald BOEHNKE · Munich, DE
Wen Xu · Unterhaching, DE

Key dates

Filing date	Jun 15, 2020
Grant date	Apr 19, 2022
Priority date	—
Expiry date	Jun 15, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH03M13/6544
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Protograph-based LDPC codes are obtained from z-row-orthogonal base matrices with some additional structure constraints, such as a diagonal and/or double-diagonal structure, in order to allow a high parallelization that is a multiple of z, while having an efficient encoding or decoding. A “big” base matrix is constructed from a structured square submatrix in order to have a WiMAX-like structure and a z-row-orthogonality. Also, starting from a “smaller” base matrix having a part arranged in a double-diagonal shape with tail-biting one, an expansion by a factor equal to z can be performed, followed by an addition of a single one-entry into the last column at a specific location, thereby obtaining a three-degree column, and followed by a row and/or column permutation in order to obtain a base matrix in a WiMAX-like structure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.