Deployment costs will be dominated by three
contributions. First, the LED needs a bias-T for
high-speed modulation. Second, we need a powerful
analog LED driver and a low-noise amplifier
after the photodiode. Both require careful
impedance matching. Third, a baseband chip is
needed based on adaptive OFDM providing an
interface to the network infrastructure (e.g., via
the power line). All these aspects are already
realizable today with commercial components, so
mass production appears feasible. Moreover,
low-cost mass production calls for monolithic system
integration as the form factor can be further
reduced in this way. Despite the add-on of communication
to lighting, the developed system is
quite energy efficient. Power consumption is only
moderately increased by 30 percent compared to
the original lighting function in our real-time
VLC system due to the optimized LED driver
design. As the choice of color temperature is relatively
unimportant for communication, the system
can also operate with tunable light color.
Deployment costs will be dominated by three
contributions. First, the LED needs a bias-T for
high-speed modulation. Second, we need a powerful
analog LED driver and a low-noise amplifier
after the photodiode. Both require careful
impedance matching. Third, a baseband chip is
needed based on adaptive OFDM providing an
interface to the network infrastructure (e.g., via
the power line). All these aspects are already
realizable today with commercial components, so
mass production appears feasible. Moreover,
low-cost mass production calls for monolithic system
integration as the form factor can be further
reduced in this way. Despite the add-on of communication
to lighting, the developed system is
quite energy efficient. Power consumption is only
moderately increased by 30 percent compared to
the original lighting function in our real-time
VLC system due to the optimized LED driver
design. As the choice of color temperature is relatively
unimportant for communication, the system
can also operate with tunable light color.
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