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Long Irregular LDPC coded OFDM with Soft Decision

by Madhusmita Mishra, Sarat Kumar Patra, Ashok Kumar Turuk
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 56 - Number 4
Year of Publication: 2012
Authors: Madhusmita Mishra, Sarat Kumar Patra, Ashok Kumar Turuk
10.5120/8878-2863

Madhusmita Mishra, Sarat Kumar Patra, Ashok Kumar Turuk . Long Irregular LDPC coded OFDM with Soft Decision. International Journal of Computer Applications. 56, 4 ( October 2012), 16-20. DOI=10.5120/8878-2863

@article{ 10.5120/8878-2863,
author = { Madhusmita Mishra, Sarat Kumar Patra, Ashok Kumar Turuk },
title = { Long Irregular LDPC coded OFDM with Soft Decision },
journal = { International Journal of Computer Applications },
issue_date = { October 2012 },
volume = { 56 },
number = { 4 },
month = { October },
year = { 2012 },
issn = { 0975-8887 },
pages = { 16-20 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume56/number4/8878-2863/ },
doi = { 10.5120/8878-2863 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:57:59.323447+05:30
%A Madhusmita Mishra
%A Sarat Kumar Patra
%A Ashok Kumar Turuk
%T Long Irregular LDPC coded OFDM with Soft Decision
%J International Journal of Computer Applications
%@ 0975-8887
%V 56
%N 4
%P 16-20
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

OFDM with quadrature amplitude modulation (QAM) technique can be used for high speed optical applications. Increasing the order of modulation, the bit error rate (BER) increases. Forward Error correction (FEC) coding like LDPC coding is generally used to improve the BER performance. LDPC provides large minimum distance and also the power efficiency of the LDPC code increases significantly with the code length. In this paper we have compared the Soft decision and Hard decision algorithms of LDPC codes. A long Irregular LDPC code is simulated over the BIAWGN channel demonstrating the fact that LDPC coded OFDM with soft decision decoding provides very lower bit error rate as well as a larger gain in transmitter power and thus making the link more power efficient than the case with hard decision decoding. Through simulation, we have shown the advantages of using this long Irregular LDPC coded OFDM link in Optical wireless communication (OWC).

References
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Index Terms

Computer Science
Information Sciences

Keywords

Long Irregular LDPC code BIAWGN channel Soft decision decoding Message-passing (MP) algorithm Error rate floors

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