A Polarization State Modulation Based Physical Layer Security Scheme for Wireless Communications

A Polarization state Modulation based Physical Layer Security (PM-PLS) scheme is proposed to enhance the physical layer security of the wireless communication system. Such scheme uses the normal communication signal as the carrier, and conceals the confidential information in the carrier's polarization state. Moreover, utilizing the polarized channel differentia, the eavesdropper's channel quality can be severely worsened. Therefore, through PM-PLS scheme, both anti-detection and modulation information protection can be achieved. Furthermore, based on the proposed polarization constellation structure and polarization constellation encryption method, the depolarization effect caused impact to the desired receiver and eavesdropper are respectively analyzed. Finally, the simulations and experiments based on GNU Radio software platform are carried out to verify the security and efficiency of the proposed PM-PLS scheme.