Abstract
Intelligent reflecting surface (IRS) is currently adopted by massive multiple-input multiple-output (MIMO) systems as a new expansion scheme. It effectively copes with the increasing cost and energy consumption. In this paper, we concentrate on an IRS-assisted MIMO system, in which the base station, IRS and user are all equipped with multiple antennas. We first give the upper bound of the ergodic capacity of the system. Then we maximize this upper bound and obtain the sub-optimal phase shifts of IRS by applying semi-definite relax and Gaussian random methods. Numerical results shows the advantage of the proposed solution and the performance increase brought by multiple antennas.
This paper is supported in part by NSFC China (61771309, 61671301, 61420106008, 61521062), Shanghai Key Laboratory Funding (STCSM18DZ1200102) and CETC Key Laboratory of Data Link Technology Foundation (CLDL-20162306).
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© 2020 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Guo, C., Lu, Z., Guo, Z., Yang, F., Ding, L. (2020). Maximum Ergodic Capacity of Intelligent Reflecting Surface Assisted MIMO Wireless Communication System. In: Gao, H., Feng, Z., Yu, J., Wu, J. (eds) Communications and Networking. ChinaCom 2019. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 312. Springer, Cham. https://doi.org/10.1007/978-3-030-41114-5_25
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DOI: https://doi.org/10.1007/978-3-030-41114-5_25
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