Title | ||
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Unsupervised time domain nonlinear post-equalization for ACO-OFDM visible light communication systems. |
Abstract | ||
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LED nonlinearity is an important issue limiting the performance of Visible Light Communication (VLC) systems. This form of distortion is particularly problematic when the system employs Optical-OFDM because of the high Peak-to-Average Power Ratio (PAPR) of its time domain symbol. This paper proposes using ancillary statistical properties of the O-OFDM signal in order to mitigate LED nonlinearities in an unsupervised fashion. By exploring the Gaussianity of the time domain OFDM signal and the idea of distribution equalization, we propose a semi-parametric approach to blind nonlinear post-equalization for asymmetrically clipped O-OFDM (ACO-OFDM) VLC systems. In addition to not requiring training data, the equalizer is robust to different LED types and it is adaptive to time-varying nonlinearities. Simulations with a realistic LED model show that the developed tool is capable of substantially mitigating the effects of nonlinear distortion on system performance. |
Year | Venue | Field |
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2017 | European Signal Processing Conference | Time domain,Nonlinear system,Equalization (audio),Computer science,Optics,Visible light communication,Electronic engineering,Nonlinear distortion,Distortion,Nonlinear optics,Orthogonal frequency-division multiplexing |
DocType | ISSN | Citations |
Conference | 2076-1465 | 0 |
PageRank | References | Authors |
0.34 | 6 | 2 |
Name | Order | Citations | PageRank |
---|---|---|---|
Flávio R. Avila | 1 | 6 | 2.22 |
Lisandro Lovisolo | 2 | 37 | 8.82 |