Physical Layer Security Design for Polar Code Construction

In contrast to the network security that relies on upper-layer encryption for confidentiality and authenticity of communications, physical layer (PLS) exploits uniqueness randomness channel encrypt information enhance system. this paper, we study PLS a polar-coded wireless communication To be more specific, leverage unique properties in polar code construction propose quality indicator (CQI)-based frozen-bit pattern generation scheme. The transmitter employs Gaussian approximation algorithm generate corresponding frozen bit according instantaneous CQI legitimate link. At receiver, by leveraging full reciprocity time-division duplex (TDD) mode, can map correctly decode received bits. By contrast, eavesdropper was unable have knowledge legal channel, hence cannot determine sequence. Our simulation results demonstrate adopting proposed key scheme, Eve hardly able complete frame, leading high block error rate (BLER), while Bob attain 10−5 BLER.