An improved quasi-cyclic low-density parity-check code for memory channels

Author

Jayabalan, Muruganandam ; Kwon, Hyuck M.

Author_Institution

Dept. of Electr. & Comput. Eng., Wichita State Univ., KS, USA

Volume

4

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

2544

Abstract

This paper presents an improved construction of circulant sub-matrices based quasi-cyclic low density parity check codes (QC-LDPC) under fading channels. The proposed construction yields a performance gain of about 2 to 5 dB at a 10^-4 bit error rate (BER). This paper also proposes a decoding method to reduce the implementation complexity in the belief propagation algorithm. Furthermore, this paper studies the performance of circulant sub-matrices based QC-LDPC codes at higher rates under AWGN and fading channels.

Keywords

AWGN channels; error statistics; fading channels; iterative decoding; parity check codes; sparse matrices; AWGN channels; BER; QC-LDPC; belief propagation decoding algorithm; bit error rate; fading channels; memory channels; quasi-cyclic low-density parity-check codes; soft decision iterative decoding; sparse circulant sub-matrices; AWGN; Belief propagation; Bit error rate; Fading; Iterative algorithms; Iterative decoding; Parity check codes; Performance gain; Power generation; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1400515

Filename

1400515