Ellipse-based DCO-OFDM for visible light communications
Ellipse-based DCO-OFDM for visible light communications
Ellipse-based DC-biased optical orthogonal frequency division multiplexing (E-DCO-OFDM) is proposed for visible light communications (VLC), which achieves a significant peak-to-average power ratio (PAPR) reduction, thus enhancing the overall performance when light-emitting diode (LED) nonlinearity is considered. In E-DCO-OFDM, the real-valued output of OFDM is modulated onto an ellipse, whereby only the imaginary part of the complex point on the ellipse is transmitted. Although the PAPR of E-DCO-OFDM decreases as the ratio of major radius to minor radius becomes larger, it may be more vulnerable to the effect of noise, leading to the performance loss. Therefore, the relationship between the system performance and the critical parameters in E-DCO-OFDM, such as the ratio between the major and minor radius of the ellipse, is investigated. Meanwhile, simulations demonstrate that E-DCO-OFDM adopting the optimal parameters achieves a considerable signal-to-noise ratio (SNR) gain over the conventional DCO-OFDM.
1-6
Mao, Tianqi
b0e1c806-8540-4a49-a523-6afc6ee7714e
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
1 February 2016
Mao, Tianqi
b0e1c806-8540-4a49-a523-6afc6ee7714e
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Mao, Tianqi, Wang, Zhaocheng, Wang, Qi and Dai, Linglong
(2016)
Ellipse-based DCO-OFDM for visible light communications.
Optics Communications, 360, .
(doi:10.1016/j.optcom.2015.10.023).
Abstract
Ellipse-based DC-biased optical orthogonal frequency division multiplexing (E-DCO-OFDM) is proposed for visible light communications (VLC), which achieves a significant peak-to-average power ratio (PAPR) reduction, thus enhancing the overall performance when light-emitting diode (LED) nonlinearity is considered. In E-DCO-OFDM, the real-valued output of OFDM is modulated onto an ellipse, whereby only the imaginary part of the complex point on the ellipse is transmitted. Although the PAPR of E-DCO-OFDM decreases as the ratio of major radius to minor radius becomes larger, it may be more vulnerable to the effect of noise, leading to the performance loss. Therefore, the relationship between the system performance and the critical parameters in E-DCO-OFDM, such as the ratio between the major and minor radius of the ellipse, is investigated. Meanwhile, simulations demonstrate that E-DCO-OFDM adopting the optimal parameters achieves a considerable signal-to-noise ratio (SNR) gain over the conventional DCO-OFDM.
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Ellipse-based DCO-OFDM for visible light communications.pdf
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Accepted/In Press date: 5 October 2015
e-pub ahead of print date: 9 November 2015
Published date: 1 February 2016
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 400594
URI: http://eprints.soton.ac.uk/id/eprint/400594
ISSN: 0030-4018
PURE UUID: d4300c32-a54a-44bd-b5a2-36b0ec3e22b0
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Date deposited: 20 Sep 2016 08:28
Last modified: 15 Mar 2024 02:23
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Author:
Tianqi Mao
Author:
Zhaocheng Wang
Author:
Qi Wang
Author:
Linglong Dai
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