| Abstract: | High-rate techniques, such as optical orthogonal frequency division multiplexing(OFDM) and color shift keying(CSK), have been proposed for visible light communication(VLC). To fully exploit their advantages,in this Letter, we design a modulation scheme called rotated polarity modulation(RPM) aided complex CSK(CCSK) for OFDM-based VLC systems and derive its theoretical bit error rate and an optimal scaling factor. Analytical and simulation results show that in comparison to the existing schemes, the new RPM-CCSK-OFDM system offers an improved link performance and data rate under a modest complexity.It can also be applied to VLC systems equipped with different types of LED devices, thus enabling flexible deployments. |
