Abstract
One of the main aims of indoor visible light communication (VLC) systems is
to deliver a high data rate services in a single user scenario and in multiuser
scenarios. A key obstacle is the ability of the indoor VLC channel to support
high data rates in the scenarios of interest. Here, we assess the potential of
a multi-branch transmitter (MBT) and its use to achieve higher data rates in
single user and multiuser indoor VLC systems. For the single user VLC system,
the performance of the MBT is examined with a wide field of view (W-FOV)
receiver and an angle diversity receiver (ADR) while for the multiuser VLC
system we evaluate the performance of the MBT with a non-imaging angle
diversity receiver (NI-ADR). In addition, for the multiuser VLC system, we
propose subcarrier multiplexing (SCM) tones to allocate an optimum transmitter
to each user. Furthermore, wavelength division multiplexing (WDM) is examined
to support higher data rates for each user while using on-off-keying (OOK)
modulation. The effect of diffuse reflections, mobility and lighting
constraints are taken into account. In addition, the effect of co-channel
interference (CCI) is considered in the multiuser VLC system.