An effective scheme for optical Doppler shift alleviation in intelligent transportation system integrating visible light communication

This paper studies the performance degradation caused by optical Doppler shift induced by frequency offset in traffic systems which integrate visible light communication (VLC). Through computer simulations the bit error rate (BER) has been derived for the system, and we can observe that frequency offset plays a significant role in the communication performance deterioration due to inter-carrier interference (ICI). Therefore, a scheme to correct the frequency offset by using forward error correction (FEC) was proposed. The main idea in this approach is to compare and analyze two channel codes: convolutional code and BCH code. The system using convolutional code shows better performance than its BCH code counterpart.