Abstract
1, This paper investigates the application of Key-based Physical Layer Security to future 5G and IoT network dimensioning, not previously considered in other works. Results indicate a Key bit Error Rate of 1% at a cell separation of 500m with a reuse of 7. A derivation for a closed form expression of the Key bit Error Rate as a function of radio network parameters is presented for a specific Precoder Matrix Index (PMI) based Physical Layer Security scheme known as MOPRO. The equation, which accounts for Rayleigh fading environments, is verified against simulated data, and shows a gain of 6dB for 1-bit codebooks over 2-bit codebooks. Also shown is a closed form statistical expression for the probability density function of the Key bit Error Rate. The expression for direct computation of Key bit Error Rate statistics points the way forward toward future physical layer security based planning in heterogeneous networks.
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