عباسعلی شریفی

Orthogonal frequency division multiplexing (OFDM) is extensively used in optical communications to achieve high rate transmission. In this paper, Vandermonde like matrix (VLM) pre-coding approach is offered to reduce the high peak-to-average power ratio (PAPR) of DC-biased optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM) signals in visible light communications. The proposed method is compared with Walsh–Hadamard transform (WHT), discrete cosine transform (DCT), and discrete Hartley transform (DHT) pre-coding approaches in terms of PAPR reduction performance. Simulation results indicate that the proposed method effectively reduces the PAPR of an optical signal in both DCO-OFDM and ACO-OFDM techniques.