Poster: Vehicular VLC Experimental Modulation Performance Comparison

Abstract

Vehicular visible light communication (V2LC) has recently gained popularity as a complementary technology to radio frequency (RF) based vehicular communication schemes due to light emitting diode (LED)s’ readily availability on vehicles with its secure and RF-interference free nature. However, vehicular visible light communication (V2LC) system performance mainly depends on LED characteristics. Investigating various LED bulbs for their frequency response and optical OFDM (O-OFDM) based modulation performances, it has been observed that LED and DC-bias voltage selection is key for the V2LC system modulation performance. Experimental results indicate that, on contrary to simulation results in the literature, asymmetrically clipped optical OFDM (ACO-OFDM) is observed to perform better than unipolar OFDM (U-OFDM) as it inherits lower peak-to-average power ratio (PAPR) with lower clipping noise which is crucial for LEDs under consideration with limited linear working region.