Mr. Fumin Wang Profile

Fumin Wang

at Fudan Univ

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Proceedings Article | 31 October 2016 Paper

Demonstration of DFTS-OFDM and equalization technology using in VLC communication on the headset port of Android device

Fumin Wang, Meng Shi, Nan Chi

Proceedings Volume 10021, 1002128 (2016) https://doi.org/10.1117/12.2246187

KEYWORDS: Modulation, Visible radiation, Wireless communications, Telecommunications, Signal generators, Orthogonal frequency division multiplexing, Light emitting diodes, Transmitters, PIN photodiodes, Signal processing

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Visible light communication (VLC) is one of the hottest research directions in wireless communication. It is safe, fast and free of electromagnetic interference. We carry out the visible light communication using DFTS-OFDM modulation mode through the headset port to and take equalization technique to compensate the channel. In this paper, we first test the feasibility of the DFTS-OFDM modulated VLC system by analyzing the constellation and the transmission error rate via the headset interface of the smartphone. Then we change the peak value of the signal generated by the AWG as well as the static current to find the best working point. We tested the effect of changing the up-sample number on the BER performance of the communication system, and compared the BER performance of 16QAM and 8QAM modulation in different equalization method. We also do experiment to find how distance affect the performance of the communication and the maximum communication rate that can be achieved. We successfully demonstrated a visible light communication system detected by a headset port of a smart phone for a 32QAM DFTS-OFDM modulated signal of 27.5kb/s over a 3-meter free space transmission. The light source is traditional phosphorescent white LED. This result, as far as we know, is the highest data rate of VLC system via headset port detection.

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