可见光通信光OFDM技术的性能评估

s a new technology in wireless communication area, visible light communication (VLC) is a potential key technology of 6G. In VLC, information is carried with light intensity and conversion between electrical signals and optical signals are through photoelectric devices.In view of the characteristics of visible light communication, there are a variety of optical orthogonal frequency division multiplexing (OFDM) technologies. In this paper, three typical optical OFDM technologies are studied, they are combined with the standard process of PDSCH to complete link-level simulation, and their performance is objectively evaluated and compared with each other. Through thesimulation, this paper finds out that the SNR-BLER performance of DCO-OFDM and ACO-OFDM is basically the same when the code rate and the average power of the transmitted signal are the same. However, DCO-OFDM requires extra power consumption to ensure the positive signal, while ACO-OFDM has a lower frequency utilization rate. Compared with ACO-OFDM, LACO-OFDM improves frequency utilization rate through stratification. However, due to the interference between layers, when SNR is the same, the more layers, the higher BLER and worse performance of the system.