Acta Photonica Sinica, Volume. 42, Issue 12, 1414(2013)
Limit Communication Rate of Visible Light Communication Datalink Based on Discrete Multitone Modulation
In order to theoretically reveal the effects of signaltonoise ratio and the required bit error rate level on limit communication rate of a discrete multitone datalink, in this paper, the electrooptical transfer function of the transmitter, the opticalelectro transfer function of the receiver and the total transfer function of generalized visible light communication channel were analyzed. Mathematical modeling of discrete multitonevisible light communication system was finally established by sufficiently considering the time and frequencydomain responses of visible light communication channel. Fomulative relations of limit communication rate versus signaltonoise ratio and bit error rate level were derived. Analytical results show that, under definite signaltonoise ratio, the limit communication rate reveals doubleexponential increasing relation with bit error rate level; under definite bit error rate level, the limit communication rate reveals Boltzmann variation trend versus signaltonoise ratio. With the universal white light emitting diode and PIN detector, when the signaltonoise is 25 dB, the limit communication rate is within the range of 200~228 Mbps for requiring a bit error rate of <10-3, which shows good agreement with the reported experimental results (202~231 Mbps).The novel thereotical analysis method and mathematical modelling proposed in this paper can also be adopted to evaluate the limit communication rate of any discrete multitonevisible light communication system, and therefore they are efficient in system parameter optimization and component selection during the design of such kind of systems.
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LI Yanting, LI Zhubo, ZHANG Hongwei, SHI Xingchen, ZHENG Chuantao. Limit Communication Rate of Visible Light Communication Datalink Based on Discrete Multitone Modulation[J]. Acta Photonica Sinica, 2013, 42(12): 1414
Received: May. 17, 2013
Accepted: --
Published Online: Dec. 16, 2013
The Author Email: Yanting LI (ytli12@mails.jlu.edu.cn)