Experimental Characterization of RGB LED Transceiver in Low-Complexity LED-to-LED Link

This paper proposes a low-complexity and energy-efficient light emitting diode (LED)-to-LED communication system for Internet of Things (IoT) devices with data rates up to 200 kbps over an error-free transmission distance up to 7 cm. The system is based on off-the-shelf red-green-blue (RGB) LEDs, of...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2020-10, Vol.20 (20), p.5754
Main Authors: Galal, Mariam, Ng, Wai Pang, Binns, Richard, Abd El Aziz, Ahmed
Format: Article
Language:English
Subjects:
Bandwidths
BER
Bias
Bit error rate
Communications systems
Contactless payment
Design optimization
Internet of Things
LED photodetector
LED-to-LED communication
Letter
Light emitting diodes
Luminous intensity
matched filter
Matched filters
Noise
Photometers
Signal to noise ratio
Spectrum allocation
Transmitters
visible light communication (VLC)
Wireless access points
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Summary:This paper proposes a low-complexity and energy-efficient light emitting diode (LED)-to-LED communication system for Internet of Things (IoT) devices with data rates up to 200 kbps over an error-free transmission distance up to 7 cm. The system is based on off-the-shelf red-green-blue (RGB) LEDs, of which the red sub-LED is employed as photodetector in photovoltaic mode while the green sub-LED is the transmitter. The LED photodetector is characterized in the terms of its noise characteristics and its response to the light intensity. The system performance is then analysed in terms of bandwidth, bit error rate (BER) and the signal to noise ratio (SNR). A matched filter is proposed, which optimises the performance and increases the error-free distance.
ISSN:1424-8220
1424-8220
DOI:10.3390/s20205754