Phase Shift Design for Intelligent Reflecting Surface Aided mmWave MIMO Systems

Intelligent reflecting surface (IRS) has been recently proposed as a promising technology to improve the spectral and energy efficiency of future wireless networks by establishing the favorable communication environments in a cost-effective manner. In this paper, we propose the phase shift design for IRS-aided millimeter wave (mmWave) communication systems that employ large antenna arrays at the transceivers. By leveraging the angular sparsity and large dimension of mmWave channels, the proposed phase shift design can significantly enhance the spectral efficiency of mmWave multiple-input multiple-output (MIMO) systems. Simulation results verify that the proposed phase shift design outperforms the existing benchmarks.