User Cooperation for IRS-aided Secure SWIPT MIMO Systems

Abstract

In this paper, intelligent reflecting surface (IRS) is proposed to enhance the physical layer security in the Rician fading channel where the angular direction of the eavesdropper is aligned with a legitimate user. In this scenario, we consider a two-phase communication system under the active attacks and passive eavesdropping. Particularly, in the first phase, the base station avoids direct transmission to the attacked user. While, in the second phase, other users cooperate to forward signals to the attacked user with the help of IRS and energy harvesting technology. Under the active attacks, we investigate an outage constrained beamforming design problem under the statistical cascaded channel error model, which is solved by using the Bernstein-type inequality. As for the passive eavesdropping, an average secrecy rate maximization problem is formulated, which is addressed by a low complexity algorithm. Numerical results show that the negative effect of the eavesdropper's channel error is greater than that of the legitimate user.

Intelligent reflecting surface (IRS), reconfigurable intelligent surface (RIS), robust design, energy harvesting, physical layer security

References in corpus (4)

• A Framework of Robust Transmission Design for IRS-aided MISO Communications with Imperfect Cascaded Channels
• Intelligent Reflecting Surface Aided Multigroup Multicast MISO Communication Systems
• Intelligent Reflecting Surface Aided MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer
• A Bernstein-type inequality for stochastic processes of quadratic forms of Gaussian variables

Cited by in corpus (3)

• Aerial Intelligent Reflecting Surface: Joint Placement and Passive Beamforming Design with 3D Beam Flattening
• A Joint Power Splitting, Active and Passive Beamforming Optimization Framework for IRS Assisted MIMO SWIPT System
• Eavesdropping with Intelligent Reflective Surfaces: Threats and Defense Strategies