Abstract
To achieve the high traffic rate of a GaN LED-based visible light communication (VLC), a 4 × 4 color-polarization-multiplexing system is demonstrated by using two blue and two green LEDs. In the measurement, an available bandwidth of blue and green LEDs can be greater than 465 MHz for VLC modulation traffic by using the suitable analogy front end circuit. Hence, the proposed VLC system can deliver 1.7 to 2.3 Gbit/s on – off keying traffic rates in the free space transmission length of 1–4 m under the extremely low illumination of 6.9–136.1 lux for the indoor application. Moreover, the measured BER of each LED is less than the forward error correction target of 3.8 × 10−3 to maintain the better signal performance.
Highlights
Due to the advantages of long lifetime, high-efficiency, lower power consumption and costeffectiveness, light-emitting diode (LED) is one of the most promising lighting devices for illumination [1]
After passing through a free space transmission length, the four visible light communication (VLC) signals are detected in the receiver (Rx) side
The polarizers could lower the illumination for VLC traffic and affect the optical signal to noise ratio (OSNR) performance
Summary
Due to the advantages of long lifetime, high-efficiency, lower power consumption and costeffectiveness, light-emitting diode (LED) is one of the most promising lighting devices for illumination [1]. In the proposed VLC system, the available bandwidth of blue and green LEDs can be greater than 465 MHz for signal modulation when using suitable analogy front end (AFE) circuit together with pre-equalization.
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