Investigation of punctured LDPC codes and time-diversity on free-space optical links

Czaputa, Martin, Javornik, Tomaz, Leitgeb, Erich, Kandus, Gorazd and Ghassemlooy, Zabih (2011) Investigation of punctured LDPC codes and time-diversity on free-space optical links. In: 11th international conference on Telecommunications - ConTEL2011, 15-17 June 2011, Graz University of Technology, Graz , Austria..

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In this paper, we analyze the behavior of DVB-S2 un-punctured/punctured low-density parity-check (LDPC) coded on-off-keying (OOK) under atmospheric turbulence conditions by utilizing time diversity. A performance characterization between these schemes is evaluated, where punctured LDPC code provides a penalty of around 0.1 to 0.2 dB against unpunctured LDPC codes but still provides a coding gain of several dB against uncoded OOK. The combination of channel coding and a bit interleaver results in performance improvements in turbulence conditions. For example, such a system can achieve a coding gain of 16.7 dB in moderate turbulence conditions compared to uncoded OOK.

Item Type: Conference or Workshop Item (Paper)
Subjects: J900 Others in Technology
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
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Depositing User: EPrint Services
Date Deposited: 03 Aug 2011 15:22
Last Modified: 09 May 2017 05:23

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