Pre-equalization versus post-equalization of the VLC LEDs

J. Siuzdak; G. Stepniak

doi:10.1117/12.2534747

6 November 2019 Pre-equalization versus post-equalization of the VLC LEDs

J. Siuzdak, G. Stepniak

Proceedings Volume 11176, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019; 1117604 (2019) https://doi.org/10.1117/12.2534747
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019, 2019, Wilga, Poland

Abstract

In the paper, there are reviewed pre-correction and pre-equalization schemes used for the correction of VLC LEDs frequency response/nonlinearity. Moreover, a theoretical analysis of pre- and post-equalization schemes efficiency was performed for a generic linear channel. It turned out that the most effective in terms of the receiver SNR is a distributed scheme when the equalization is performed at both the transmitter and receiver. The SNR gain of the distributed scheme may exceed 2 dB as compared to either pre- or post- equalization. The obtained generic results well apply to the VLC LED case.

Citation Download Citation

J. Siuzdak and G. Stepniak "Pre-equalization versus post-equalization of the VLC LEDs", Proc. SPIE 11176, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019, 1117604 (6 November 2019); https://doi.org/10.1117/12.2534747

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