Now showing items 1-3 of 3

  • Channel Estimation for DCO-OFDM Based VLC Systems in the Presence of Clipping Noise 

    Authors:Bektaş, Ekin Başak; Panayırcı, Erdal
    Publisher and Date:(IEEE, 2020)
    Visible Light Communication(VLC) has been considered as a potential access option for 6G wireless systems to solve performance limitation due to bandwidth shortage at radio frequency (RF) band. In VLC system, illumination infrastructure has dual usage at the same time namely illumination and wireless data transmission. DC-Biased optical DCO-OFDM with clipping has been proposed for VLC systems to provide optically power efficient solution and easy implementation. Wireless communication systems ...

  • Physical layer security in the visible light communications systems 

    Authors:Bektaş, Ekin Başak
    Publisher and Date:(Kadir Has University, 2020)
    With the rapid developments in technology in recent years, the need for fast and secure access to information has been increasing day by day. With this increasing demand, the radio frequency (RF) band which used for wireless communication is rapidly filling and even the limit is approached. Therefore, this increasing need day by day has led to the emergence of a new research area. Many researchers from both academia and industry are looking for an alternative route. Visible light communication ...

  • Sparse Channel Estimation with Clipping Noise in DCO-OFDM Based VLC Systems 

    Authors:Bektaş, Ekin Başak; Panayırcı, Erdal
    Publisher and Date:(IEEE, 2020)
    In this paper a new computationally efficient and high performance channel estimation algorithm is proposed for DC-biased optical OFDM (DCO-OFDM) systems in indoor visible light communications (VLC) in the presence of a clipping noise. The sparse structure of the channel is taken into consideration in the channel estimation algorithm. The algorithm has an iterative structure and aims at reducing the effect of the clipping noise, inevitably generated by the DCO-OFDM systems. In te algorithm, the ...