Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions

Optical channel decorrelation is a key aspect in designing a multi-user visible light communication system. As light-emitting diodes (LEDs) are commonly used for illumination and data transmission in such a system simultaneously, the interference between them is a major problem for suitable modulati...

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Autores principales:	Adrian Krohn, Stephan Pachnicke, Peter Hoeher
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2022
Materias:	Visible light communication optical communication free-space optical communication multiple-input multiple-output Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/8abc2f6eddb648c989a526bb95d0f357
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spelling	oai:doaj.org-article:8abc2f6eddb648c989a526bb95d0f3572021-11-23T00:00:32ZGenetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions1943-065510.1109/JPHOT.2021.3126211https://doaj.org/article/8abc2f6eddb648c989a526bb95d0f3572022-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9609592/https://doaj.org/toc/1943-0655Optical channel decorrelation is a key aspect in designing a multi-user visible light communication system. As light-emitting diodes (LEDs) are commonly used for illumination and data transmission in such a system simultaneously, the interference between them is a major problem for suitable modulation schemes. We have proposed to position liquid-crystal (LC) matrix elements in front of the receivers in order to block unwanted light – so effectively acting as filter and reducing the interference. To do so, the appropriate pixels of the LC filter are switched either to a transmissive state or to an opaque state. The selection of the correct pixel patterns is a high-order optimization problem, which makes it challenging for classic algorithms. In this paper, we suggest applying a genetic optimization to find suitable pixel patterns. We combine this kind of receiver-side optimization with conventional convex precoding at the transmitter side in an iterative manner. The overall optimization goal is to maximize the sum rate over all users. To prove the effectiveness, we use a numeric ray-tracing simulation with different settings. Also we analyze the impact of the main parameters for the genetic algorithm.Adrian KrohnStephan PachnickePeter HoeherIEEEarticleVisible light communicationoptical communicationfree-space optical communicationmultiple-input multiple-outputApplied optics. PhotonicsTA1501-1820Optics. LightQC350-467ENIEEE Photonics Journal, Vol 14, Iss 1, Pp 1-5 (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Visible light communication optical communication free-space optical communication multiple-input multiple-output Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
spellingShingle	Visible light communication optical communication free-space optical communication multiple-input multiple-output Applied optics. Photonics TA1501-1820 Optics. Light QC350-467 Adrian Krohn Stephan Pachnicke Peter Hoeher Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions
description	Optical channel decorrelation is a key aspect in designing a multi-user visible light communication system. As light-emitting diodes (LEDs) are commonly used for illumination and data transmission in such a system simultaneously, the interference between them is a major problem for suitable modulation schemes. We have proposed to position liquid-crystal (LC) matrix elements in front of the receivers in order to block unwanted light – so effectively acting as filter and reducing the interference. To do so, the appropriate pixels of the LC filter are switched either to a transmissive state or to an opaque state. The selection of the correct pixel patterns is a high-order optimization problem, which makes it challenging for classic algorithms. In this paper, we suggest applying a genetic optimization to find suitable pixel patterns. We combine this kind of receiver-side optimization with conventional convex precoding at the transmitter side in an iterative manner. The overall optimization goal is to maximize the sum rate over all users. To prove the effectiveness, we use a numeric ray-tracing simulation with different settings. Also we analyze the impact of the main parameters for the genetic algorithm.
format	article
author	Adrian Krohn Stephan Pachnicke Peter Hoeher
author_facet	Adrian Krohn Stephan Pachnicke Peter Hoeher
author_sort	Adrian Krohn
title	Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions
title_short	Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions
title_full	Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions
title_fullStr	Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions
title_full_unstemmed	Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions
title_sort	genetic optimization of liquid crystal matrix based interference suppression for vlc mimo transmissions
publisher	IEEE
publishDate	2022
url	https://doaj.org/article/8abc2f6eddb648c989a526bb95d0f357
work_keys_str_mv	AT adriankrohn geneticoptimizationofliquidcrystalmatrixbasedinterferencesuppressionforvlcmimotransmissions AT stephanpachnicke geneticoptimizationofliquidcrystalmatrixbasedinterferencesuppressionforvlcmimotransmissions AT peterhoeher geneticoptimizationofliquidcrystalmatrixbasedinterferencesuppressionforvlcmimotransmissions
_version_	1718417386575495168

Genetic Optimization of Liquid Crystal Matrix Based Interference Suppression for VLC MIMO Transmissions

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