Outage Constrained Robust Transmission Design for IRS-aided Secure Communications with Direct Communication Links

Hong S, Pan C, Zhou G, Ren H, Wang K (2023)

Publication Type: Journal article

Publication year: 2023

Journal

IEEE Transactions on Communications Institute of Electrical and Electronics Engineers (IEEE)

Pages Range: 1-1

DOI: 10.1109/TCOMM.2023.3335865

Abstract

This paper considers an intelligent reflecting surface (IRS) aided secure communication with direct communication links where a legitimate receiver (Bob) served by a base station (BS) is overheard by multiple eavesdroppers (Eves), meanwhile the artificial noise (AN) is incorporated to confuse Eves. Since Eves are not legitimate users, their channels cannot be estimated perfectly. We investigate two scenarios with partial channel state information (CSI) error of only cascaded BS-IRS-Eve channel and full CSI errors of both cascaded BS-IRS-Eve channel and direct BS-Eve channel under the statistical CSI error model. To ensure the security performance under CSI errors, the transmit beamforming, AN spatial distribution at the BS, and phase shifts at IRS are jointly optimized to minimize the transmit power constrained by the minimum data rate requirement of Bob and the outage probability of maximum data rate limitation of Eves. In contrast to existing works, the direct link considered in our work makes the optimization of phase shifts at IRS much more challenging, thus we propose a series of novel and artful mathematical manipulations to tackle this issue. Moreover, the proposed algorithm can be applied for both uncorrelated and correlated CSI errors. Simulations confirm the superiority of our proposed algorithm.

Authors with CRIS profile

Gui Zhou Lehrstuhl für Digitale Übertragung

Involved external institutions

Nanchang University (NCU) / 南昌大学 CN China (CN) Southeast University / 东南大学 CN China (CN) Brunel University London GB United Kingdom (GB)

How to cite

APA:

Hong, S., Pan, C., Zhou, G., Ren, H., & Wang, K. (2023). Outage Constrained Robust Transmission Design for IRS-aided Secure Communications with Direct Communication Links. IEEE Transactions on Communications, 1-1. https://dx.doi.org/10.1109/TCOMM.2023.3335865

MLA:

Hong, Sheng, et al. "Outage Constrained Robust Transmission Design for IRS-aided Secure Communications with Direct Communication Links." IEEE Transactions on Communications (2023): 1-1.

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