Performance Analysis of a Visible Light Vehicle-To-Vehicle Wireless Communication System

Analysis of an optical wireless communication (OWC) system based on visible light communication (VLC) applied for vehicle-to-vehicle (V2V) communication is presented here. The theoretical investigation assumes arrays of light emitting diodes (LEDs) and photodiodes (PDs) for full duplex communication with spatial diversity between head- and tail-lights of vehicles in visible spectrum. The transmission spectrum from both sides i.e. 400 - 550 nm for headlight, 560 - 700 nm for taillight, falls on opposite sides of visible spectrum and no interference from source to detector in tandem is assumed. A signal received at detector in tandem with headlights suggests communication between vehicles moving towards each other. Two lights in front as well as back of vehicle develop an opportunity to explore and analyze a multiple input and multiple output (MIMO) possibility. A 2 × 2 MIMO configuration is assumed along with transmit and receive diversity to maintain communication in particular instances such as at T-junctions between two vehicles. Performance analysis of an OWC system suggests that a high bit rate transmission may be achieved depending on distance between vehicles.