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1-Gb/s Transmission Over a Phosphorescent White LED by Using Rate-Adaptive Discrete Multitone Modulation

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5 Author(s)
Khalid, A.M. ; Scuola Superiore Sant''Anna—TeCIP, Pisa, Italy ; Cossu, G. ; Corsini, R. ; Choudhury, P.
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Light-emitting diodes (LEDs), which will be increasingly used in lighting technology, will also allow for distribution of broadband optical wireless signals. Visible-light communication (VLC) using white LEDs offers several advantages over the RF-based wireless systems, i.e., license-free spectrum, low power consumption, and higher privacy. Mostly, optical wireless can provide much higher data rates. In this paper, we demonstrate a VLC system based on a white LED for indoor broadband wireless access. After investigating the nonlinear effects of the LED and the power amplifier, a data rate of 1 Gb/s has been achieved at the standard illuminance level, by using an optimized discrete multitone modulation technique and adaptive bit- and power-loading algorithms. The bit-error ratio of the received data was 1.5\cdot 10^{-3} , which is within the limit of common forward error correction (FEC) coding. These results twice the highest capacity that had been previously obtained.

Published in:

Photonics Journal, IEEE  (Volume:4 ,  Issue: 5 )