Fig. 6
From: Developing hybrid car-to-car communication system based on MIMO visible light and radio frequency
The BER versus distance. In VLC communication, increasing the distance leads to higher BER until approximately 100 m (i.e., the maximum allowed distance for VLC communication) in each hop. In VLC first hop, a small BER is noticed, in the second hop, the error increased due to the repeater amplify and forward scheme errors, while at higher hops have higher max errors. In contrast, RF communication has near-constant BER at distances from 100 m (i.e., after the VLC hop maximum communication distance) up to 200 m. We consider no communication at distances greater than 200 m to ensure the minimized interference in RF (omnidirectional radiation pattern) and to maximize the frequency reuse in car-to-car RF communication