On construction of rate-compatible low-density Parity-check codes

Author

Yazdani, Mohammad R. ; Banihashemi, Amir H.

Author_Institution

Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada

Volume

8

Issue

3

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

159

Lastpage

161

Abstract

In this letter, we present a framework for constructing rate-compatible low-density parity-check (LDPC) codes. The codes are linear-time encodable and are constructed from a mother code using puncturing and extending. Application of the proposed construction to a type-II hybrid automatic repeat request (ARQ) scheme with information block length k=1024 and code rates 8/19 to 8/10, using an optimized irregular mother code of rate 8/13, results in a throughput which is only about 0.7 dB away from Shannon limit. This outperforms existing similar schemes based on turbo codes and LDPC codes by up to 0.5 dB.

Keywords

automatic repeat request; iterative methods; linear codes; optimisation; parity check codes; ARQ scheme; LDPC code construction; Shannon limit; code rate; extending; information block length; iterative coding scheme; linear-time encodable code; low-density parity-check code; optimized irregular mother code; puncturing; rate-compatible code; type-II hybrid automatic repeat request scheme; AWGN; Adaptive coding; Automatic repeat request; Data communication; Decoding; Error correction codes; Forward error correction; Parity check codes; Throughput; Turbo codes;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2004.825728

Filename

1278307