DocumentCode
961390
Title
Lifting methods for quasi-cyclic LDPC codes
Author
Myung, Seho ; Yang, Kyeongcheol ; Kim, Youngkyun
Author_Institution
Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol.
Volume
10
Issue
6
fYear
2006
fDate
6/1/2006 12:00:00 AM
Firstpage
489
Lastpage
491
Abstract
In this paper, we present two simple methods to construct a quasi-cyclic LDPC (QC-LDPC) code of larger length by lifting a given QC-LDPC code. We show that its girth is always larger than or equal to that of the given QC-LDPC code. Applying the methods recursively, it is possible to construct a sequence of QC-LDPC codes generated from a single exponent matrix by proper floor or modulo operations. Simulation results show that they have no serious performance degradation, as compared with randomly constructed LDPC codes
Keywords
cyclic codes; matrix algebra; parity check codes; sequences; QC-LDPC code; lifting method; low density parity check codes; modulo operation; quasi-cyclic codes; sequence construction; single exponent matrix; AWGN; Additive white noise; Degradation; Microwave integrated circuits; OFDM; Parity check codes; Quantum cascade lasers;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2006.1638625
Filename
1638625
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