Open AccessToeplitz concatenated matrix aided ICA algorithm for super-Nyquist multiband CAP VLC systems
Author(s) -
Zhe Wang,
Guoqiang Li,
Fangchen Hu,
Nan Chi
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.404925
Subject(s) - subcarrier , nyquist–shannon sampling theorem , toeplitz matrix , algorithm , computer science , visible light communication , spectral efficiency , demodulation , interference (communication) , optics , mathematics , electronic engineering , physics , telecommunications , channel (broadcasting) , orthogonal frequency division multiplexing , engineering , light emitting diode , pure mathematics , computer vision
In this paper, we demonstrate a Toeplitz concatenated matrix aided independent component analysis (TCM-ICA) equalizer that can skillfully compensate for the inter-channel interference (ICI) of super-Nyquist multiband carrierless amplitude and phase modulation (m-CAP) system. In the point-to-point super-Nyquist m-CAP visible light communication (VLC) scenario, we experimentally demonstrated a system-level average spectral efficiency (SE) enhancement of 0.50 b/s/Hz in comparison to the conventional scheme. In the multiple-input single-output (MISO) super-Nyquist 5-CAP scenario, the subcarrier-level Q factor enhancements of 4.4 dB, 5.2 dB, and 6.5 dB are achieved in comparison with the least-mean-square (LMS) post-equalizer for the 2 nd , 3 rd and 4 th subcarrier, respectively. As far as we know, the TCM-ICA equalizer is the most effective ICI compensation scheme to enhance SE in the super-Nyquist m-CAP systems.