A Comparative Study on Bandwidth and Noise for Pre-Emphasis and Post-Equalization in Visible Light Communication

Dong YAN; Xurui MAO; Sheng XIE; Jia CONG; Dongqun HAN; Yicheng WU

doi:10.1587/transcom.2019EBP3206

IEICE TRANSACTIONS on Communications

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A Comparative Study on Bandwidth and Noise for Pre-Emphasis and Post-Equalization in Visible Light Communication

Dong YAN, Xurui MAO, Sheng XIE, Jia CONG, Dongqun HAN, Yicheng WU

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Summary :

This paper presents an analysis of the relationship between noise and bandwidth in visible light communication (VLC) systems. In the past few years, pre-emphasis and post-equalization techniques were proposed to extend the bandwidth of VLC systems. However, these bandwidth extension techniques also influence noise and sensitivity of the VLC systems. In this paper, first, we build a system model of VLC transceivers and circuit models of pre-emphasis and post-equalization. Next, we theoretically compare the bandwidth and noise of three different transceiver structures comprising a single pre-emphasis circuit, a single post-equalization circuit and a combination of pre-emphasis and post-equalization circuits. Finally, we validate the presented theoretical analysis using experimental results. The result shows that for the same resonant frequency, and for high signal-to-noise ratio (S/N), VLC systems employing post-equalization or pre-emphasis have the same bandwidth extension ability. Therefore, a transceiver employing both the pre-emphasis and post-equalization techniques has a bandwidth √2 times the bandwidth of the systems employing only the pre-emphasis or post-equalization. Based on the theoretical analysis of noise, the VLC system with only active pre-emphasis shows the lowest noise, which is a good choice for low-noise systems. The result of this paper may provide a new perspective of noise and sensitivity of the bandwidth extension techniques in VLC systems.

Publication: IEICE TRANSACTIONS on Communications Vol.E103-B No.8 pp.872-880

Publication Date: 2020/08/01

Publicized: 2020/02/25

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2019EBP3206

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Dong YAN
  Tianjin University
Xurui MAO
  Chinese Academy of Sciences
Sheng XIE
  Tianjin University
Jia CONG
  Tianjin University
Dongqun HAN
  Tianjin University
Yicheng WU
  Tianjin University

Keyword

visible light communication (VLC), pre-emphasis, post-equalization, noise, bandwidth

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Dong YAN, Xurui MAO, Sheng XIE, Jia CONG, Dongqun HAN, Yicheng WU, "A Comparative Study on Bandwidth and Noise for Pre-Emphasis and Post-Equalization in Visible Light Communication" in IEICE TRANSACTIONS on Communications, vol. E103-B, no. 8, pp. 872-880, August 2020, doi: 10.1587/transcom.2019EBP3206.
Abstract: This paper presents an analysis of the relationship between noise and bandwidth in visible light communication (VLC) systems. In the past few years, pre-emphasis and post-equalization techniques were proposed to extend the bandwidth of VLC systems. However, these bandwidth extension techniques also influence noise and sensitivity of the VLC systems. In this paper, first, we build a system model of VLC transceivers and circuit models of pre-emphasis and post-equalization. Next, we theoretically compare the bandwidth and noise of three different transceiver structures comprising a single pre-emphasis circuit, a single post-equalization circuit and a combination of pre-emphasis and post-equalization circuits. Finally, we validate the presented theoretical analysis using experimental results. The result shows that for the same resonant frequency, and for high signal-to-noise ratio (S/N), VLC systems employing post-equalization or pre-emphasis have the same bandwidth extension ability. Therefore, a transceiver employing both the pre-emphasis and post-equalization techniques has a bandwidth √2 times the bandwidth of the systems employing only the pre-emphasis or post-equalization. Based on the theoretical analysis of noise, the VLC system with only active pre-emphasis shows the lowest noise, which is a good choice for low-noise systems. The result of this paper may provide a new perspective of noise and sensitivity of the bandwidth extension techniques in VLC systems.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2019EBP3206/_p

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@ARTICLE{e103-b_8_872,
author={Dong YAN, Xurui MAO, Sheng XIE, Jia CONG, Dongqun HAN, Yicheng WU, },
journal={IEICE TRANSACTIONS on Communications},
title={A Comparative Study on Bandwidth and Noise for Pre-Emphasis and Post-Equalization in Visible Light Communication},
year={2020},
volume={E103-B},
number={8},
pages={872-880},
abstract={This paper presents an analysis of the relationship between noise and bandwidth in visible light communication (VLC) systems. In the past few years, pre-emphasis and post-equalization techniques were proposed to extend the bandwidth of VLC systems. However, these bandwidth extension techniques also influence noise and sensitivity of the VLC systems. In this paper, first, we build a system model of VLC transceivers and circuit models of pre-emphasis and post-equalization. Next, we theoretically compare the bandwidth and noise of three different transceiver structures comprising a single pre-emphasis circuit, a single post-equalization circuit and a combination of pre-emphasis and post-equalization circuits. Finally, we validate the presented theoretical analysis using experimental results. The result shows that for the same resonant frequency, and for high signal-to-noise ratio (S/N), VLC systems employing post-equalization or pre-emphasis have the same bandwidth extension ability. Therefore, a transceiver employing both the pre-emphasis and post-equalization techniques has a bandwidth √2 times the bandwidth of the systems employing only the pre-emphasis or post-equalization. Based on the theoretical analysis of noise, the VLC system with only active pre-emphasis shows the lowest noise, which is a good choice for low-noise systems. The result of this paper may provide a new perspective of noise and sensitivity of the bandwidth extension techniques in VLC systems.},
keywords={},
doi={10.1587/transcom.2019EBP3206},
ISSN={1745-1345},
month={August},}

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TY - JOUR
TI - A Comparative Study on Bandwidth and Noise for Pre-Emphasis and Post-Equalization in Visible Light Communication
T2 - IEICE TRANSACTIONS on Communications
SP - 872
EP - 880
AU - Dong YAN
AU - Xurui MAO
AU - Sheng XIE
AU - Jia CONG
AU - Dongqun HAN
AU - Yicheng WU
PY - 2020
DO - 10.1587/transcom.2019EBP3206
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E103-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2020
AB - This paper presents an analysis of the relationship between noise and bandwidth in visible light communication (VLC) systems. In the past few years, pre-emphasis and post-equalization techniques were proposed to extend the bandwidth of VLC systems. However, these bandwidth extension techniques also influence noise and sensitivity of the VLC systems. In this paper, first, we build a system model of VLC transceivers and circuit models of pre-emphasis and post-equalization. Next, we theoretically compare the bandwidth and noise of three different transceiver structures comprising a single pre-emphasis circuit, a single post-equalization circuit and a combination of pre-emphasis and post-equalization circuits. Finally, we validate the presented theoretical analysis using experimental results. The result shows that for the same resonant frequency, and for high signal-to-noise ratio (S/N), VLC systems employing post-equalization or pre-emphasis have the same bandwidth extension ability. Therefore, a transceiver employing both the pre-emphasis and post-equalization techniques has a bandwidth √2 times the bandwidth of the systems employing only the pre-emphasis or post-equalization. Based on the theoretical analysis of noise, the VLC system with only active pre-emphasis shows the lowest noise, which is a good choice for low-noise systems. The result of this paper may provide a new perspective of noise and sensitivity of the bandwidth extension techniques in VLC systems.
ER -

IEICE TRANSACTIONS on Communications