Research on the performance of indoor visible light Non-DC-Biased OFDM system based on color/frequency/space three-dimension resources multiplexing

In this paper, a novel orthogonal frequency division multiplexing(OFDM)-based indoor visible light communication(VLC) system was proposed that can provide a high reliability transmission performance while maintaining ambient light stability by using multicolor LEDs. This solution combines Spatial Modulation(SM) and Metameric Modulation(MM) with OFDM-VLC communication system. Along with all of the promising advantages of OFDM, SM and MM, the proposed system will be applicable for high-speed indoor white communication. Through the simulation results, it is known that the proposed indoor visible light transmission system has significant advantages over DC-biased Optical OFDM (DCO-OFDM) and Asymmetrically Clipped Optical OFDM(ACO-OFDM). Moreover, it is robust to the nonlinear distortion caused by a large peak-to-average power ratio(PAPR) of OFDM signal in comparision with other NDC-OFDM VLC transmission systems, and hardly generate intensity fluctuation.