Downlink Cooperation with Fractional Frequency Reuse in DCO-OFDMA Optical Attocell Networks

Abstract: Indoor visible light communication (VLC) cellular networks, also termed as optical attocell networks, offer significant data rate enhancements which may offload data traffic busrts from the existing Wi-Fi networks. In this study, downlink cooperation using non-orthogonal amplify-and-forward (NAF) relaying protocol is proposed for optical attocell networks, with the aim of improving the spectral efficiency performance. An orthogonal frequency division multiple access (OFDMA) system based on direct current optical orthogonal frequency division multiplexing (DCO-OFDM) with a hexagonal cellular layout and fractional frequency reuse (FFR) planning is considered. A system level analysis is carried out, and average spectral efficiency performance of the system is studied through Monte-Carlo simulations. The results provide several insights into the performance of the proposed system, which are useful for designing cooperative optical attocell networks.

Biography: Hossein Kazemi received his M.Sc. degree on analog integrated circuits from the department of electrical engineering, Sharif University of Technology, Tehran, Iran in 2011, and his M.Sc. degree (1st class honors) on communication systems from the department of electrical and electronics engineering, Ozyegin University, Istanbul, Turkey in 2014. He is currently working toward his Ph.D. degree under the supervision of Prof. Harald Haas at the institute for digital communications, University of Edinburgh, Edinburgh, UK. His research interests include wireless communications with particular emphasis on optical wireless communications.