Doubly Generalized LDPC Codes over the AWGN Channel

Author

Wang, Yige ; Fossorier, Marc

Author_Institution

Mitsubishi Electr. Res. Labs., Cambridge, MA

Volume

57

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

1312

Lastpage

1319

Abstract

In this paper, the design of doubly generalized low-density parity-check (DGLDPC) codes is proposed. This approach generalizes the structure of LDPC codes at both check and variable nodes. The performance of DGLDPC codes over the AWGN channel is analyzed using EXIT charts. Combined with differential evolution optimization, this analysis provides thresholds for DGLDPC codes that are better than that of LDPC and GLDPC codes with the same maximum variable degree. These theoretical thresholds are verified via simulations. Furthermore DGLDPC codes exhibit a lower error floor compared with their LDPC and GLDPC counterparts.

Keywords

optimisation; parity check codes; AWGN channel; differential evolution optimization; doubly generalized LDPC codes; doubly generalized low-density parity-check codes; extrinsic information transfer charts; AWGN channels; Bipartite graph; Code standards; Communications Society; Error correction; Error correction codes; Floors; Parity check codes; Performance analysis; Reed-Solomon codes; Differential evolution optimization, extrinsic information transfer (EXIT) charts, generalized low-density paritycheck (GLDPC) codes, low-density parity-check (LDPC) codes;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2009.05.070264

Filename

4939225