Multi-coded variable PPM (MC-VPPM) is a modulation technique for visible light communication (VLC), providing high data rate transmission and processing gain improvement at the receiver side. This paper proposes wavelength hopping MC-VPPM supporting multi-user communications in the vehicle-to-infrastructure (V2I) downlink and uplink scenarios of a metropolitan intelligent transportation system and analyzes its performance. By defining outdoor daylight noise and analyzing the sub-band selection effect for wavelength hopping, the communication capability of multi-user V2I downlink and uplink VLC at the daytime was investigated. The simulation results provide the required VLC transmission power for reliable data communication under the predescribed V2I scenario.
Photonic Network Communications – Springer Journals
Published: Jan 29, 2016
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