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In a visible light communications system (VLC), light sources are responsible for both illumination, communications and positioning. These light sources inevitably interfere each others at the receiver. To retain the appealing advantage that VLC systems can reuse existing lighting infrastructure, using an extra network to control or synchronize the light sources should be avoided. This paper proposes...
To avoid interference among the signals from different transmitters in a visible light positioning (VLP) system, central unit is usually used. This resists us to simply deploy a VLP system on the existing lighting infrastructure. This paper proposes an uncoordinated multiple access scheme for VLP systems without the need for central unit. A unique codeword is allocated to each transmitter equipped...
Visible light communication (VLC) has attracted a lot of attention in past several years. VLC systems can be used for both communications and indoor positioning. Several designs of VLC systems have been proposed and most of them require central units to control the light emitting diodes (LEDs) in the transmitters to avoid interference at the receiver side. In this paper, we propose a novel multiple...
In visible light communications, it is common to have more than one light sources within the line of sight of a receiver. This paper proposes an adaptive modulation scheme for a system with two light sources and two receivers where two different data streams are sent to the two receivers. The transmitted powers of both light sources are optimized to reduce the bit error rate (BER) at the receivers...
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