A visible light communication (VLC) broadcast channel is considered, in which a transmitter communicates with two receivers in the presence of an external eavesdropper. Trusted cooperative half-duplex relays are deployed to aid with securing the transmitted data. Transmission is amplitude-constrained to maintain operation within the light emitting diodes (LEDs) dynamic range. Achievable secrecy rate regions are derived under such amplitude constraints for this multi receiver wiretap channel, first for direct transmission without the relays, and then for cooperative jamming, decode-and-forward, and amplify-and-forward relaying schemes. Superposition coding with uniform signaling is used for transmission, along with secure beamforming at the relays. Superiority of the secure relaying schemes over direct transmission is shown, with performance depending on how far the eavesdropper is from the transmitter and the relays.
|Original language||English (US)|
|Title of host publication||2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP)|
|Number of pages||5|
|State||Published - Feb 21 2019|
Bibliographical noteKAUST Repository Item: Exported on 2022-06-30
Acknowledged KAUST grant number(s): OSR-2016-CRG5-2958-02
Acknowledgements: This research was supported in part by the U.S. National Science Foundation under Grant CNS-1702808. Erdal Panayirci has been supported by the Turkish Scientific and Research Council (TUBITAK) under 2219 International Fellowship Program and in part by KAUST under Grant No. OSR-2016-CRG5-2958-02.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.