Impact Statement:In this paper, we give a convincing conclusion about precoding matrix method used in VLC systems. We reveal the reason why the precoding matrix can improve the performanc...Show More
Abstract:
Orthogonal frequency-division-multiplexing (OFDM) technology is widely used in visible light communication (VLC) to achieve high data rate transmission. However, the trad...Show MoreMetadata
Impact Statement:
In this paper, we give a convincing conclusion about precoding matrix method used in VLC systems. We reveal the reason why the precoding matrix can improve the performance of DCO-OFDM VLC system and how to use precoding matrix in different VLC scenarios. The simulation and experimental results verified the presented theory.
Abstract:
Orthogonal frequency-division-multiplexing (OFDM) technology is widely used in visible light communication (VLC) to achieve high data rate transmission. However, the traditional direct-current (DC)-biased optical OFDM (DCO-OFDM) VLC systems suffer from the high peak-to-average power ratio (PAPR) which causes signal clipping distortion, and, thus, performance degradation. Furthermore, severe high-frequency fading due to the limited system bandwidth results in poor bit error rate (BER) performance. Precoding matrix (PM) techniques have been proposed to enhance the performance of VLC OFDM transmission, but a little or no work has been carried out in investigating the theory of PM used in OFDM VLC systems. In this paper, we aim to reveal the theory of PM-DCO-OFDM for a VLC system. To figure out the intrinsic laws of a PM method, we investigate the principles of PAPR reduction, clipping distortion optimization, and signal-to-noise ratio (SNR) distribution equalization. Based on the analysis...
Published in: IEEE Photonics Journal ( Volume: 10, Issue: 5, October 2018)