Pilot Assisted Channel Estimation for Asymmetrically Clipped Optical OFDM over Visible Light Channels


Doğan H., ŞAYLI O. , Panayırcı E.

4th International Black Sea Conference on Communications and Networking, Varna, Bulgaria, 6 - 09 June 2016, pp.1-4

  • Publication Type: Conference Paper / Full Text
  • City: Varna
  • Country: Bulgaria
  • Page Numbers: pp.1-4

Abstract

The Visible Light Communication(VLC) has drawn significant attention recently for wireless communication in addressing the performance limitations of wireless systems due to the scarcity of bandwidth. In VLC system, the visible lights is used not only for illuminating rooms but also for an optical data transmission. Asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM) has been proposed for VLC systems to provide optically power efficient solution in the optical domain. The estimation of wireless channel is crucial in order to detect the transmitted data coherently. In this work, spline interpolation based channel estimations for comb-type pilot distribution is proposed over visible light channels. Computer simulation results have confirmed that the proposed channel estimation technique has a clear BER performance advantages compared with linear interpolation based channel estimation for higher order modulations.