Influence of indoor floor reflections in visible light car-to-car communication link

摘要

We investigate visible light car-to-car (C2C) communications by considering multiple reflections from the floor in underground and covered parking environments as well as interferences from the ambient lighting (i.e., fluorescent lamps) via experimental measurements. A set of messages are transmitted and we experimentally confirm that the transmitted message set is successfully recovered. The average signal distribution patterns are measured and analyzed at a transmission distance, considering the installed heights of the transmitter and receiver. In general, the light components from fluorescent lamps in indoor environments affect the average voltage level of the received signal, which is more significant at higher receiver positions. The measurements show that the indoor visible light communication performance is varied depending on floor reflections as well. We have experimentally shown that the BER less than 1.0 × 10~(-6) could be achieved over the measurement plane by varying the height of the transmitter, consequently, varying the contribution of floor reflections. intelligent transport system; illumination; light-emitting diode; visible light communication; interference; floor reflection.