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.

Secure transmission in a W-band RoF system based on delta-sigma modulation.

In this Letter, a delta-sigma modulation (DSM) encryption technique in a W-band RoF system is proposed. By performing DSM with different over-sample ratios (OSRs) on the OFDM signal based on the controlled keys generated by the chaotic system at the transmitter and performing constellation masking to disturb the transmitting signal for encryption, a high-order QAM-OFDM-DSM encrypted signal is achieved. In order to further improve the security of the system, bit bidirectional diffusion scrambling is used to resist chosen-plaintext attacks.