Performance analysis of the VLC system with Z-HBT line coding

We propose a Z-HBT line coding for a visible light communication (VLC) system. Z-HBT line coding is defined as follows. First, we apply half bit transition to one bit. Second, we decode encoded bits using difference of bit transition level in one bit duration. As a result, we obtain advantages about synchronization problem and noise effect mitigation at the receiver. We set up outdoor the VLC simulation environment. At simulation results, we show 2–3dB gain as compared with existing line coding schemes.