201 / 2017-01-05 18:33:32

Performance Analysis of Indoor Joint Illumination and Communication Systems using Light Emitting Diodes and Laser Diodes

optical wireless communication,visible light communication

The abundant and unlicensed optical spectrum is
utilized for communication in Joint Illumination and visible-light
Communication (JIC) technique through the indoor illumination
sources such as light emitting diodes (LED) and Laser diodes
(LD). With a view toward green technologies, the power sharing
LD based JIC system is mathematically modeled and its
performance is compared with that of LED based JIC system. In
order to reduce the directionality of Laser, the transmissive
diffuser is used in the LD based JIC model. The performance of
modeled LD based JIC system is analyzed in terms of illuminance
distribution, delay spread, achievable data rate and energy
efficiency. With the consideration to eye and skin safety, the
analysis is carried out under the illumination constraint of indoor
work places. The LED based JIC system has the maximum delay
of 0.1738 ns and thus it can offer the data rate of 575 Mbps. The
LD based JIC system provides the data rate of 794 Mbps due to
its relatively less delay of 0.1258 ns. While considering the power
consumption for having these data rates, the LED based JIC
system is more energy efficient than the LD based JIC system.
The opportunities and obstacles of LED and LD for the
simultaneous illumination and communication objective are also
addressed.