Integrated deceptive sensing and secure communication scheme based on RSC-OFDM in a photonics-assisted 100 GHz millimeter-wave system.

In this Letter, an integrated deceptive sensing and secure communication scheme based on random subcarrier (RSC) orthogonal frequency-division multiplexing (OFDM) in a photonics-assisted millimeter-wave (MMW) system is proposed. Based on chaotic encryption on bit and constellation level, the RSC-OFDM signal is used to further disturb the transmitting signal and achieve sensing deception. Moreover, to make full use of sensing function to achieve collaborative security, sensing-aided dynamic parameter (DP) encryption is designed, which uses sensing information as the random seed to get encryption DPs and sequences. In the experiment, the RSC-OFDM signal integrated deceptive sensing and secure communication are successfully transmitted over a 1.2 m wireless channel in a 100 GHz MMW system. The results show that the proposed scheme can effectively improve the security of the system while ensuring bit error rate performance. The data rate can be up to 7.69 G bit/s and the scheme can achieve centimeter-level resolution and millimeter-level accuracy. Meanwhile, the scheme can successfully achieve distance deception between 0.25 and 8.03 m for 1.2 m target.