Dimming control scheme based on hybrid LACO-SCFDM for visible light communications

Siqiao Li; Tiantian Zhang; Yaojun Qiao; Ji Zhou

doi:10.3788/COL202119.040601

Journals >Chinese Optics Letters >Volume 19 >Issue 4 >Page 040601 > Article

Chinese Optics Letters
Vol. 19, Issue 4, 040601 (2021)

Dimming control scheme based on hybrid LACO-SCFDM for visible light communications

Siqiao Li¹, Tiantian Zhang², Yaojun Qiao^1、*, and Ji Zhou³

Author Affiliations

¹Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

²Institute of Electronic and Information Industry, China Center for Information Industry Development, Beijing 100876, China

³Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou 510632, China

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DOI: 10.3788/COL202119.040601 Cite this Article Set citation alerts

Siqiao Li, Tiantian Zhang, Yaojun Qiao, Ji Zhou. Dimming control scheme based on hybrid LACO-SCFDM for visible light communications[J]. Chinese Optics Letters, 2021, 19(4): 040601 Copy Citation Text

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Fig. 1. Schematic of the proposed HLACO-SCFDM dimming method.

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(a) BER characteristics of HLACO-SCFDM and HLACO-OFDM versus the scaling factor ρ with different spectral efficiencies. Inserts show the first-layer signal decoding constellations, respectively. (b) SNR on different subcarriers for points A and B.

Fig. 2. (a) BER characteristics of HLACO-SCFDM and HLACO-OFDM versus the scaling factor

ρ

with different spectral efficiencies. Inserts show the first-layer signal decoding constellations, respectively. (b) SNR on different subcarriers for points A and B.

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Fig. 3. Analysis of spectral efficiency versus

η

for different layers of (a) HLACO-OFDM and (b) HLACO-SCFDM.

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Fig. 4. Analysis of spectral efficiency versus

η

for HLACO-SCFDM, HLACO-OFDM, hybrid HACO-OFDM, DCO-OFDM, and AHO-SCFDM.

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Parameters	Values	Parameters	Values
Number of subcarriers	256	Signal bandwidth	100 MHz
Cyclic prefix	16	Low-pass filter bandwidth	10 MHz
Number of symbols	512	Noise power	$- 22.8 dBm$
Training sequences	10	Target BER	$2 \times 10^{- 3}$

Table 1. Simulation Parameters

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Dimmable Scheme	Transmitter	Receiver
HLACO-SCFDM	$\frac{(2 \cdot 2^{L} - 2)}{2^{L}} O (N)$	$\frac{(4 \cdot 2^{L} - 5)}{2^{L}} O (N \log_{2} N)$
HLACO-OFDM^[16]	$\frac{(2 \cdot 2^{L} - 2)}{2^{L}} O (N \log_{2} N)$	$\frac{(5 \cdot 2^{L} - 8)}{2^{L}} O (N \log_{2} N)$
AHO-SCFDM^[18]	$\frac{3}{2} O (N)$	$\frac{11}{4} O (N \log_{2} N)$
DCO-OFDM^[17]	$O (N \log_{2} N)$	$O (N \log_{2} N)$

Table 2. Computational Complexity

Siqiao Li, Tiantian Zhang, Yaojun Qiao, Ji Zhou. Dimming control scheme based on hybrid LACO-SCFDM for visible light communications[J]. Chinese Optics Letters, 2021, 19(4): 040601

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