Abstract
We propose a vsible light communication scheme utilizing red, green and blue light-emitting diodes (LEDs) and three color-tuned photodiodes. Amplitude shift keying modulation is considered, and its effect on light emission in terms of flickering, dimming, and color rendering is discussed. The presence of interference at each photodiode generated by the other two colors is used to improve detection since interference is symbol-dependent. Moreover, the capability of the photodiodes to follow the LEDs speed is considered by analyzing the possibility of equalizing the received signal, and also self-interference mitigation is proposed. The system performance is evaluated both with computer simulations and tests on an Arduino board implementation.
Highlights
Visible light communications (VLC) can be an effective complementary technology to radio frequency (RF) especially for its flexibility of adoption in places like airplanes and hospitals where the use of RF is limited or forbidden.Light emitting diodes (LEDs) are increasingly used as a more power efficient illumination sources than incandescent lamps, meeting the requirements for global electromagnetic pollution reduction
Since lightemitting diodes (LEDs) can quick react to driver signals, they allow the accomplishment of data transmission while illuminating which is the distinctive characteristic of a VLC system [1]
The problem of dimming has been tackled [3,4] and inverse source coding is employed for improving the performance of a VLC system working according to non-return-to-zero on-off keying (NRZ-OOK) and M-ary pulse amplitude modulation (M-PAM), respectively
Summary
Visible light communications (VLC) can be an effective complementary technology to radio frequency (RF) especially for its flexibility of adoption in places like airplanes and hospitals where the use of RF is limited or forbidden. One solution [8] considers different modulations formats to achieve a very high data rate, of the order of Gb/s, by using a single commercial RGB-White LEDs and three RGB LEDs. At the transmitter perfect channel knowledge is required in order to perform bit-loading. Some of the above cited contributions present high data rate systems, even though considering a very limited communication distance in the order of few centimeters In this sense, remarkable improvements are highlighted in the literature where the authors demonstrate a WDM based VLC link able to perform over a range between 1.5 and 4 meters [13]. We provide an experimental setup based on Arduino-Due board
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
