Spatial ODAC performance for indoor environment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F14%3APU111106" target="_blank" >RIV/00216305:26220/14:PU111106 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Spatial ODAC performance for indoor environment
Original language description
The optical digital to analog conversion (ODAC) concept was introduced as a method able to cope with light- emitting diodes (LED) non-linear characteristic and dimming constraints. The approach is similar to an electrical digital-to- analog converter (DAC), where several digital bit streams are weighted in order to represent an analog signal. This technique enables simple on-off modulation schemes, which are able to take full advantage of the LEDs non-linear characteristic and also allow pulse-width modulation (PWM) dimming to be em- ployed for combined lighting and communication means. Unlike electrical DACs, and ODAC has a reconstruction error that depends not only on the bit depth of the converter, but also on the system set-up. This paper presents simulation results able to show the reconstruction error performance as a function of space, luminaire placement, LEDs half power angle (HPA) and photo detector field of view (FOV). The set-up assumes multipath due to reflections and low bit rates. Important conclusions point out for necessary precautions concerning the LEDs and photo detectors characteristics, which are linked to the number of LED luminaires inside the room and the uniformity of the lighting conditions.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
3rd International Workshop in Optical Wireless Communications (IWOW)
ISBN
978-1-4799-6676-9
ISSN
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e-ISSN
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Number of pages
5
Pages from-to
70-74
Publisher name
Neuveden
Place of publication
Funchal, Madeira Island, Portugal
Event location
Madeira Island
Event date
Sep 17, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000454640800015

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