Design of low-density parity-check codes for bandwidth efficient modulation

Author

Hou, Jilei ; Siegel, Paul H. ; Milstein, Laurence B. ; Pfister, Henry D.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, CA, USA

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

24

Lastpage

26

Abstract

We design low-density parity-check (LDPC) codes for bandwidth efficient modulation using a multilevel coding (MLC) technique. We develop a method to analyze the asymptotic performance of the LDPC codes using message-passing decoding at each level of the MLC scheme as the codeword length goes to infinity. Simulation of very large block size LDPC codes verifies the accuracy of the analytical results. We jointly optimize the code rates and code parameters of the LDPC codes at each level of the MLC scheme, and the asymptotic performance of the optimized irregular LDPC codes is very close to the channel capacity of the additive white Gaussian noise (AWGN) channel

Keywords

AWGN channels; binary codes; channel capacity; channel coding; decoding; error correction codes; modulation coding; optimisation; phase shift keying; AWGN channel; Gray-mapped 8-PSK modulation; LDPC codes; MLC scheme; additive white Gaussian noise channel; asymptotic performance; bandwidth efficient modulation; channel capacity; coded modulation; low-density parity-check codes; message-passing decoding; multilevel coding technique; parallel independent decoding; AWGN; Additive white noise; Analytical models; Bandwidth; Channel capacity; Decoding; H infinity control; Modulation coding; Parity check codes; Performance analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory Workshop, 2001. Proceedings. 2001 IEEE

Conference_Location

Cairns, Qld.

Print_ISBN

0-7803-7119-4

Type

conf

DOI

10.1109/ITW.2001.955124

Filename

955124