Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios

Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios

Free-space optical communication links operating over lognormal turbulence channels using on-off keying (OOK) are studied in this paper. Such systems can suffer from irreducible error floors that result from the use of demodulation with fixed and unoptimized detection thresholds. The resulting error...

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Bibliographic Details
Main Authors: Luanxia Yang, Xuegui Song, Julian Cheng, Jonathan F. Holzman
Format: Article
Language:English
Published: IEEE 2016-01-01
Series:IEEE Access
Subjects:
Atmospheric turbulence
optical wireless communications
on-off keying
Online Access:https://ieeexplore.ieee.org/document/7389967/
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spelling doaj-384d1a3aba3e4cd0a58c58e22a1a201c2021-03-29T19:38:03ZengIEEEIEEE Access2169-35362016-01-01457458410.1109/ACCESS.2016.25209367389967Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction RatiosLuanxia Yang0Xuegui Song1Julian Cheng2Jonathan F. Holzman3School of Engineering, The University of British Columbia, Kelowna, BC, CanadaSchool of Engineering, The University of British Columbia, Kelowna, BC, CanadaSchool of Engineering, The University of British Columbia, Kelowna, BC, CanadaSchool of Engineering, The University of British Columbia, Kelowna, BC, CanadaFree-space optical communication links operating over lognormal turbulence channels using on-off keying (OOK) are studied in this paper. Such systems can suffer from irreducible error floors that result from the use of demodulation with fixed and unoptimized detection thresholds. The resulting error floors are analyzed for the general case of low- and high-state offsets (i.e., finite extinction ratios). An electrical signal-to-noise ratio (SNR) optimized detection system is applied. The system uses the electrical SNRs to implement adaptive detection thresholds and eliminate the error floors. The system can accommodate operation with finite extinction ratios, as it uses the method of moments and maximum likelihhod estimation techniques to estimate the low- and high-state offsets and electrical SNR. Numerical results show that the SNR gap between the electrical-SNR-optimized detection system and the adaptive detection system is 2.3 dB at a bit-error rate of 10<sup>-5</sup> without a state offset. The SNR gap increases to 4.5 dB with a state offset of &#x03BE;=0.2 .https://ieeexplore.ieee.org/document/7389967/Atmospheric turbulenceoptical wireless communicationson-off keying
collection DOAJ
language English
format Article
sources DOAJ
author Luanxia Yang
Xuegui Song
Julian Cheng
Jonathan F. Holzman
spellingShingle Luanxia Yang
Xuegui Song
Julian Cheng
Jonathan F. Holzman
Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios
IEEE Access
Atmospheric turbulence
optical wireless communications
on-off keying
author_facet Luanxia Yang
Xuegui Song
Julian Cheng
Jonathan F. Holzman
author_sort Luanxia Yang
title Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios
title_short Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios
title_full Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios
title_fullStr Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios
title_full_unstemmed Free-Space Optical Communications Over Lognormal Fading Channels Using OOK With Finite Extinction Ratios
title_sort free-space optical communications over lognormal fading channels using ook with finite extinction ratios
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2016-01-01
description Free-space optical communication links operating over lognormal turbulence channels using on-off keying (OOK) are studied in this paper. Such systems can suffer from irreducible error floors that result from the use of demodulation with fixed and unoptimized detection thresholds. The resulting error floors are analyzed for the general case of low- and high-state offsets (i.e., finite extinction ratios). An electrical signal-to-noise ratio (SNR) optimized detection system is applied. The system uses the electrical SNRs to implement adaptive detection thresholds and eliminate the error floors. The system can accommodate operation with finite extinction ratios, as it uses the method of moments and maximum likelihhod estimation techniques to estimate the low- and high-state offsets and electrical SNR. Numerical results show that the SNR gap between the electrical-SNR-optimized detection system and the adaptive detection system is 2.3 dB at a bit-error rate of 10<sup>-5</sup> without a state offset. The SNR gap increases to 4.5 dB with a state offset of &#x03BE;=0.2 .
topic Atmospheric turbulence
optical wireless communications
on-off keying
url https://ieeexplore.ieee.org/document/7389967/
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AT xueguisong freespaceopticalcommunicationsoverlognormalfadingchannelsusingookwithfiniteextinctionratios
AT juliancheng freespaceopticalcommunicationsoverlognormalfadingchannelsusingookwithfiniteextinctionratios
AT jonathanfholzman freespaceopticalcommunicationsoverlognormalfadingchannelsusingookwithfiniteextinctionratios
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