Physical Layer Security Enhancement Exploiting Intelligent Reflecting Surface
| Autor: | Yijian Chen, Shi Jin, Yu Han, Xiao Li, Keming Feng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Signal Processing (eess.SP)
Beamforming Linear programming Computer science business.industry Physical layer 020206 networking & telecommunications 02 engineering and technology Data_CODINGANDINFORMATIONTHEORY Upper and lower bounds Computer Science Applications Rate of convergence Modeling and Simulation Telecommunications link FOS: Electrical engineering electronic engineering information engineering 0202 electrical engineering electronic engineering information engineering Wireless Electrical and Electronic Engineering Electrical Engineering and Systems Science - Signal Processing business Algorithm Computer Science::Information Theory |
| Popis: | In this letter, the use of intelligent reflecting surface (IRS) to enhance the physical layer security of downlink wireless communication is investigated. Assuming a single-antenna legitimate user and a multi-antenna eavesdropper, we propose an effective algorithm to jointly optimize the active and passive beamforming. In the proposed algorithm, the optimal transmit beamforming vector at the BS under fixed IRS phase shifts is derived, and a low-complexity algorithm based on fractional programming (FP) and manifold optimization (MO) is proposed to obtain near optimal IRS phase shifts. Simulation results demonstrate that the proposed algorithm can almost achieve the performance upper bound with a fast convergence rate. 6 pages, 4 figures, accepted by IEEE Communications Letters |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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