Confidential MIMO optical camera communication aided by two-dimensional pilot

• Shanshan Hu, xuefen chi, Fenglei Ji, Shaoqi Chen, and Gaoyang Hu
• received 03/22/2024; accepted 04/20/2024; posted 04/22/2024; Doc. ID 524542
• Abstract: Optical camera communication (OCC), as a novel network technique for the Sixth-Generation (6G), attracts increasing attention for its inherent security advantage. However, there still exists the risk of eavesdropping on the broadcasting channel of OCC. To achieve confidential communication, we propose the confidentiality-interference dual LEDs communication (CIDLC) scheme at the transmitter (TX) and elimination of interference (EI) scheme at the receiver (RX). Meanwhile, the interference signals refer to the bits shift of confidential signals. Further, we propose the two-dimensional pilot-aided channel estimation (2D-PACE) scheme to enhance the reliability of MIMO OCC. \hl{Experiment results validate the effectiveness of our schemes, which guarantee confidentiality while performing well at 2 m non-line-of-sight (NLOS) distance.} Finally, the communication-illumination integration OCC is constructed via the energy equalization coding (EEC) scheme.