0.52 11.86 Gbit/s OFDM modulation for power sharing VLC transmission by using VCSEL laser.
In this paper, we propose employing a 682 nm vertical cavity surface emitting laser (VCSEL) with 1 GHz bandwidth for high speed and power sharing wireless visible light communication (VLC) in the different transmission distances of 2 to 5 m. In the measurement, the data rate of 0.52 to 11.86 Gbit/s (0.44 to 10.8 Gbit/s in a net data rate) can be achieved by using spectral efficient orthogonal frequency division multiplexing (OFDM) modulation with bit loading algorithm. Therefore, 4 to 256 quadrature amplitude modulations (QAMs) are employed simultaneously in the modulation bandwidth for VCSEL based VLC. The proposed power sharing VLC system can be divided to four end users, when three beam splitters (BSs) are used simultaneously. Moreover, all of the measured bit error rates (BERs) are below the forward error correction (FEC) threshold (BER 3.8 x 10 3)
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