Characterization of Light-To-Frequency Converter for Visible Light Communication Systems

被引：14
作者：
Martinez Ciro, Roger Alexander [1 ]
Lopez Giraldo, Francisco Eugenio [1 ]
Betancur Perez, Andres Felipe [2 ]
Luna Rivera, Martin [3 ]
机构：
[1] ITM, Fac Ingn, Calle 54A 30-01, Medellin 050012, Colombia
[2] Univ Carlos III Madrid, Dept Tecnol Elect, Calle Butarque 15, Madrid 28911, Spain
[3] UASLP, Fac Ciencias, Ave Salvador Nava S-N, San Luis Potosi 78290, Mexico
来源：
ELECTRONICS | 2018年 / 7卷 / 09期
关键词：
visible light communication; light to frequency converter; white-light LED; optical wireless communication;
D O I：
10.3390/electronics7090165
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
PIN (positive intrinsic negative) photodiodes and analog-to-digital converters (ADC) are commonly used on visible light communication (VLC) receivers in order to retrieve the data on detected signals. In this paper, a visible light communication receiver based on a light to frequency converter (LTF) is proposed. We characterized the LTF and derived an equation for signal-to-noise ratio (SNR) estimation in terms of its input optical power, and the frequency of the output periodic signal. The experiments show that the periodic signal of the LTF converter has a maximum output frequency of 600 kHz at a distance of 6.2 cm. In this setup, measured SNR reached 18.75 dB, while the lowest obtained SNR with 1.1 m length was roughly -35.1 dB. The results obtained suggest that a bit rate of 150 kbps can be achieved with an on-off keying (OOK) modulation format. We analyzed the results and discuss the advantages and limitations of the LTF converter for optical wireless communication purposes.
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页数：11
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