Enhancing the performance of optical VLC system based on asymmetric symmetric subcarriers OFDM. (23rd October 2019) - Sobhy, Androw
Summary: Recently, visible light communications (VLCs) based on the orthogonal frequency‐division multiplexing (OFDM) technique play an important role in the field of wireless communications. Researches in that field found techniques to improve performance and reduce the system complexity. This paper proposes a system named asymmetric symmetric subcarriers enhanced optical (ASSEO)‐OFDM applied to VLC based on OFDM technique. The proposed system enhances the transmitted data rate by a factor of 1/8 compared with other existing systems. Keeping the same transmitted data rate as the comparable techniques, simulation results show an enhancement of the Eb/No for the proposed system by at least 0.65 dB than asymmetrically and symmetrically clipping optical (ASCO)‐OFDM, by at least 2 dB than asymmetrically clipped optical (ACO)‐OFDM and FLIP‐OFDM, and by at least 0.9 dB than DC‐biased optical (DCO)‐OFDM system at bit error rate (BER) of 10 −4 . An analytical description of the ASSEO proposed system is also introduced in this paper besides a comparative study with other existing systems. Abstract : This paper proposes a system called Asymmetric Symmetric Subcarriers Enhanced Optical (ASSEO)‐OFDM, which increases the rate of data transmitted by a factor of 1/8 relative to ACO‐OFDM and FLIP‐OFDM. Keeping the same transmitted data rate as comparable techniques, the simulation results show an increase of Eb/No for the proposed system by at least 0.65 dB relative to ASCO‐OFDM, ACO‐OFDM, FLIP‐OFDM, and DCO‐OFDM systems at bit error rate (BER) of 10 −4 .