Patent · US Active

Systems and methods for constructing the base matrix of quasi-cyclic low-density parity-check codes

US8433972B2 · kind B2 · utility

3Cited by

1References

18Claims

0Family size

Assignee

NEC Laboratories America, Inc. · US

Inventors

Guosen Yue · Edison, US
Li Zhang · Chicago, US
Xiaodong Wang · Zhejiang, CN

Key dates

Filing date	Jan 28, 2010
Grant date	Apr 30, 2013
Priority date	—
Expiry date	Oct 16, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH03M13/116
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Construction of base matrices for quasi-cyclic (QC)-low density parity-check codes (LDPC) using two novel metrics are described. Design constraints based on a local girth and a local minimum approximate cycle extrinsic message degree (ACE) of variable nodes in the base matrix are employed. In particular, various local girth and local minimum ACE constraints can be set for different lift sizes. Additionally, the base matrix can be configured as a universal base matrix from which different base matrices having different corresponding lift sizes that comply with the design constraints can be obtained and used to generate QC-LDPC codes.

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