Intelligent Reflecting Surface Assisted Secrecy Communication: Is Artificial Noise Helpful or Not?

By Xinrong Guan, Qingqing Wu, Rui Zhang. IEEE Wireless Communications Letters, 2019

456 citations recorded by the source corpus.

In this letter, we investigate whether the use of artificial noise (AN) is helpful to enhance the secrecy rate of an intelligent reflecting surface (IRS) assisted wireless communication system. Specifically, an IRS is deployed nearby a single-antenna receiver to assist in the transmission from a multi-antenna transmitter, in the presence of multiple single-antenna eavesdroppers. Aiming to maximize the achievable secrecy rate, a design problem for jointly optimizing transmit beamforming with AN or jamming and IRS reflect beamforming is formulated, which is however difficult to solve due to its non-convexity and coupled variables. We thus propose an efficient algorithm based on alternating optimization to solve the problem sub-optimally. Simulation results show that incorporating AN in transmit beamforming is beneficial under the new setup with IRS reflect beamforming. In particular, it is unveiled that the IRS-aided design without AN even performs worse than the AN-aided design without IRS as the number of eavesdroppers near the IRS increases.

Subfields: Electrical and Electronic Engineering, Genetics

View Paper: https://www.semanticscholar.org/paper/af7b5182f092e0e43ecdc0e5a41f67cae729e29f

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Citations in the corpus

Toward Smart Wireless Communications via Intelligent Reflecting Surfaces: A Contemporary Survey (2019, methodology): “Besides the LT’s transmit beamforming, the authors in [169] allow the LT to actively inject noise-like jamming signals to the channel, and further optimize the LT’s jamming signals to enhance the achievable secrecy rate.”
Channel Estimation for RIS-Empowered Multi-User MISO Wireless Communications (2020, background): “In physical-layer security systems, artificial noise [16] was lately combined with RISs to enhance the secrecy rate performance [17]–[19].”
Deep Reinforcement Learning-Based Intelligent Reflecting Surface for Secure Wireless Communications (2020, methodology): “Moreover, the authors in [22] and [25] employed the artificial noise-aided beamforming for IRS-aided MISO secure”
Intelligent Reflecting Surface Aided MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer (2019, background): “The authors of [16]–[18] studied the security issues of a single-user case, while the authors of [19]–[21] considered multiple-user scenarios.”
Beamforming Optimization for Wireless Network Aided by Intelligent Reflecting Surface With Discrete Phase Shifts (2019, background): “, physical layer security [17], [20]–[22], simultaneous wireless information and power transfer (SWIPT) [23]–[26], and non-orthogonal multiple access [27], [28].”
Reconfigurable Intelligent Surface Aided NOMA Networks (2019, background): “Numerous application scenarios, such as RISs aided physical layer security relying on cooperative jamming techniques have also been considered [19], [20].”
Intelligent Reflecting Surface Enhanced Wireless Networks: Two-Timescale Beamforming Optimization (2019, background): “multiplexing (OFDM) system [14], [15], IRS-aided mmWave communications [16], physical layer security [17]–[20], wireless power transfer [21]–[24], and so on.”
Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial (2020, background): “Moreover, AN/jamming by the transmitter can be jointly designed with IRS passive beamforming to further reduce the eavesdropper’s rate without compromising the rate performance of the legitimate user [123], [124].”
An Overview of Signal Processing Techniques for RIS/IRS-Aided Wireless Systems (2021, unknown): “cell systems [107], [152], [153], physical layer security systems [89], [93], [94], [103], [104], [154], [155], simultaneous wireless information and power transfer (SWIPT) [105], [114], [119], [156]–[160], mobile edge computing networks [80], [117], [161]–[166], multicast networks [102], [167], cog”
Reconfigurable Intelligent Surfaces: Principles and Opportunities (2020, background): “[155] examined the effectiveness of AN in an RIS-enhanced MISOME system.”
Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How It Works, State of Research, and The Road Ahead (2020, methodology): “In [200], the authors analyze a wiretap channel in which an RIS is used to aid a multi-antenna transmitter to communicate with a single-antenna receiver in the presence of multiple single-antenna eavesdroppers.”