Abstract
A genetic algorithm controlled multispot transmitter is proposed as
an alternative approach to optimizing the power distribution for single element
receivers in fully diffuse mobile indoor optical wireless communication systems.
By specifically tailoring the algorithm, it is shown that by dynamically altering
the intensity of individual diffusion spots, a consistent power distribution,
with negligible impact on bandwidth and rms delay spread, can be created in
multiple rooms independent of reflectivity characteristics and user movement
patterns. This advantageous adaptability removes the need for bespoke system
design, aiming instead for the use of a more cost effective, optimal transmitter
and receiver capable of deployment in multiple scenarios and applications.
From the simulations conducted it is deduced, that implementing a receiver
with a ${\rm FOV}=55^{\circ}$ in conjunction with either of two notable algorithms,
the dynamic range of the rooms, referenced against the peak received power,
can be reduced by up to 26% when empty, and furthermore to within 12% of this
optimized case when user movement perturbs the channel.
© 2009 IEEE
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