Nowadays, a lot of researchers are working on the
development of light-emitting diode (LED) lighting system. The LED lighting
system can achieve lower power consumption and has a longer life-time compared
to the fluorescent lamp system.
In this project, the characteristic of short
transient time in turning the light on/off processes was further investigated.
A high-speed wireless communication system, which is embedded in our LED
lighting system, was built. The duplex communication system consists of both
downlink and uplink media through different frequencies of lights.
Several experiments were conducted in the visible
light communication system. In this communication system, off-the-self
components were taken part in building the driver circuit and the performance
of the system was evaluated, such as, data transmission rate, data transmission
distance and the field of view of the transmitter.
In this paper, transmission of MP3 music was
demonstrated by using warm-White LED transmitter. Not limit to this, multiple
source signals simultaneously in different frequency bands were transmitted
through the RGB LED circuitry, and the signals were recovered successfully.
This demonstrates the feasibility studies of our design in signals
broadcasting.
0 comments: