Flexible Physical Layer Security for Joint Data and Pilots in Future Wireless Networks

In this work, novel physical layer security (PLS) schemes are proposed for orthogonal frequency-division multiplexing (OFDM) to secure both data and pilots in multiple-input multiple-output (MIMO) systems. The majority of previous studies focus on only securing the without considering used channel estimation. However, leakage state information (CSI) from a legitimate node an eavesdropper allows latter acquire knowledge about nodes. To end, we propose adaptive flexible PLS algorithms which can 1) data, 2) pilots, 3) jointly pilots. Particularly, minimum-phase all-pass decomposition is exploited, where use component provide harming performance user. analysis security, evaluate secrecy under correlated uncorrelated eavesdropping channels via closed-form bit error rate (BER) formulas. For pilot analyze estimated channel’s normalized mean squared (NMSE) performance. simulation results theoretical demonstrate that effectively enhance communication overall system.