Wireless Information Surveillance via STAR-RIS
<|reference_start|>Wireless Information Surveillance via STAR-RIS: We explore the potential of a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) to enhance the performance of wireless surveillance systems. The STAR-RIS is deployed between a full-duplex (FD) multi-antenna legitimate eavesdropper (E) and a suspicious communication pair. It reflects the suspicious signal towards the suspicious receiver (SR), while simultaneously transmitting the same signal to E for interception purposes. Additionally, it enables the forwarding of a jamming signal from E to SR, which is located on the back side of the STAR-RIS. To enhance the eavesdropping non-outage probability, we formulate a non-convex joint optimization problem to design the beamforming vectors at E and reflection/transmission phase shift matrices at the STAR-RIS. We adopt the block coordinate descent (BCD) algorithm and propose an approach, mainly based on semi-definite relaxation (SDR) and successive convex approximation (SCA), for solving the resulting decoupled sub-problems. Finally, we compare the performance of the proposed design against low-complexity zero-forcing (ZF)-based beamforming designs.<|reference_end|>
@article{jafarian2024wireless,
    title={Wireless Information Surveillance via STAR-RIS},
    author={Fatemeh Jafarian, Mehrdad Ardebilipour, Mohammadali Mohammadi, Michail
  Matthaiou},
    journal={arXiv preprint arXiv:2402.01037},
    year={2024},
    archivePrefix={arXiv},
    eprint={2402.01037},
    primaryClass={cs.IT math.IT}
}