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Fig. 10 | PhotoniX

Fig. 10

From: High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

Fig. 10

a Optimal current and Vpp for Sample C to obtain the highest SNR. b Data rate versus different signal baud rate at the distance of 1.2 m, 2 m and 3 m. c SNR and bit distribution at the highest data rate of 3.37 Gbps. Insets: allocated QAM signal diagrams with the loaded bit number from 2 bits/symbol to 7 bits/symbol. d Power ratio at each DMT subcarrier after the bit and power loading technology

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