In this paper, novel spectral efficient cooperative transmission schemes are proposed for downlink in indoor light-fidelity (Li-Fi) cellular networks, also termed as optical attocell networks. Downlink cooperation builds upon dual-hop decode-and-forward (DF) relaying with the aid of one or two neighboring base stations (BSs). The connections between the source BS and the relay BSs are provided by perfectly aligned visible light communication (VLC) links. Two cooperation protocols are introduced and evaluated, namely, non-orthogonal DF (NDF) and joint transmission with DF (JDF). A multiple access system based on direct current optical orthogonal frequency division multiplexing (DCO- OFDM) with fractional frequency reuse (FFR) is considered. Also, a line-of-sight (LOS) Lambertian propagation model is used for the indoor VLC channel. For each scheme, the signal-to- interference-plus-noise ratio (SINR) and spectral efficiency for user equipment (UE) with random coordinates in an attocell are derived. The average spectral efficiency within an optical attocell is studied using Monte Carlo simulations.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Spectral Efficient Cooperative Downlink Transmission Schemes for DCO-OFDM-Based Optical Attocell Networks


    Contributors:


    Publication date :

    2016-09-01


    Size :

    297412 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Interference Characterization in Downlink Li-Fi Optical Attocell Networks

    Surampudi, A. / Ganti, R. K. | British Library Online Contents | 2018


    Fractional Frequency Reuse in DCO-OFDM-Based Optical Attocell Networks

    Chen, Cheng / Videv, Stefan / Tsonev, Dobroslav et al. | British Library Online Contents | 2015



    Interference Mitigation for Indoor Optical Attocell Networks Using an Angle Diversity Receiver

    Zhe, C. / Basnayaka, D. A. / Xiping, W. et al. | British Library Online Contents | 2018


    Interference Mitigation for Indoor Optical Attocell Networks Using an Angle Diversity Receiver

    Basnayaka, Dushyantha A. / Haas, Harald | British Library Online Contents | 2018