We consider a cell-free massive MIMO (CF-mMIMO) system with multi-antenna access points (APs) and distributed protective partial zero-forcing (PPZF) precoding, which is prone to an active eavesdropping attack during uplink training. We develop a tractable analytical framework to derive a novel closed-form expression for the spectral efficiency (SE) at the users and eavesdropper (Eve), and, hence, the secrecy SE. These closed-form expressions are of particular importance for enabling further system design. Our findings show that PPZF can substantially outperform the conventional maximum-ratio transmission (MRT) scheme especially when the ratio of number of AP antennas to the number of users is high. Moreover, the secrecy enhancement obtained by using a higher number of AP antennas is more pronounced when Eve is located farther away from the legitimate user. Finally, simulation results validate the accuracy of the derived theoretical analysis.


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    Titel :

    Cell-Free Massive MIMO with Protective Partial Zero-Forcing and Active Eavesdropping


    Beteiligte:


    Erscheinungsdatum :

    01.06.2023


    Format / Umfang :

    1343217 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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