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On the Nonlinear Distortion Characterization in Photovoltaic Modules for Visible Light Communication

Photovoltaic (PV) modules have been employed in visible light communication (VLC) for simultaneous energy harvesting and data reception. A PV-based receiver features easy optical alignment and self-powered operation. It is commonly assumed that PV modules in VLC have a linear optical-electrical resp...

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Bibliographic Details
Published in:IEEE photonics technology letters 2021-12, Vol.33 (24), p.1467-1470
Main Authors: Chen, Shuyan, Liu, Liqiong, Chen, Lian-Kuan
Format: Article
Language:English
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Summary:Photovoltaic (PV) modules have been employed in visible light communication (VLC) for simultaneous energy harvesting and data reception. A PV-based receiver features easy optical alignment and self-powered operation. It is commonly assumed that PV modules in VLC have a linear optical-electrical response, which is generally true under high illumination levels. This letter will illustrate the exacerbated PV's nonlinear distortion when under typical indoor illumination. The nonlinearity of a PV module for different numbers of PV cells is also characterized. We investigated the transmission performance of a 1-Mbit/s PAM4 signal under different illuminance. Experimental results show that the bit-error rate (BER) first decreases and then increases with the increasing illuminance. Thus, an optimal illuminance to minimize BER exists. In addition, we demonstrated two distortion mitigation methods, namely localized distortion compensation lighting and post-distortion compensation. BER reduction from 3.2 \times 10^{-1} to 2.6 \times 10^{-3} and 2.8 \times 10^{-2} to 1.5 \times 10^{-2} are achieved with the two respective schemes.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2021.3128680