articleIEEE Wireless Communications LettersMay 28, 2019Closed access

Secure Wireless Communication via Intelligent Reflecting Surface

MCMiao CuiGZGuangchi ZhangRZRui Zhang

Guangdong University of Technology · National University of Singapore

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Abstract

An intelligent reflecting surface (IRS) can adaptively adjust the phase shifts of its reflecting units to strengthen the desired signal and/or suppress the undesired signal. In this letter, we investigate an IRS-aided secure wireless communication system where a multi-antenna access point (AP) sends confidential messages to a single-antenna user in the presence of a single-antenna eavesdropper. In particular, we consider the challenging scenario where the eavesdropping channel is stronger than the legitimate communication channel and they are also highly correlated in space. We maximize the secrecy rate of the legitimate communication link by jointly designing the AP's transmit beamforming and the IRS's…

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Topics & keywords

Topics
Keywords
  • Eavesdropping
  • Beamforming
  • Computer science
  • Wireless
  • Secrecy
  • Artificial noise
  • Channel (broadcasting)
  • Heuristic
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