A covert communication system under block fading channels is considered, where users experience uncertainty about their channel knowledge. The transmitter seeks to hide the covert communication to a private user by exploiting a legitimate public communication link, while the warden tries to detect this covert communication by using a radiometer. We derive the exact expression for the radiometer's optimal threshold, which determines the performance limit of the warden's detector. Furthermore, for given transmission outage constraints, the achievable rates for legitimate and covert users are analyzed, while maintaining a specific level of covertness. Our numerical results illustrate how the achievable performance is affected by the channel uncertainty and required level of covertness.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Covert Communication in Fading Channels under Channel Uncertainty


    Contributors:


    Publication date :

    2017-06-01


    Size :

    325072 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Prediction of V2V channel quality under double-Rayleigh fading channels

    Chen, Yifan / Dou, Zheng / Lin, Yun et al. | IEEE | 2020



    Covert Wireless Communication on Beidou Short Message Communication

    Wang, Maochun / Yang, Weiwei / Xu, Lu et al. | Springer Verlag | 2022


    Covert Wireless Communication on Beidou Short Message Communication

    Wang, Maochun / Yang, Weiwei / Xu, Lu et al. | TIBKAT | 2022