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• W4287736227 startingPage "3879" @default.
• W4287736227 abstract "We consider a two-way full-duplex (FD) system where a massive multi-input-multi-output FD base station (BS) communicates with multiple FD users via an intelligent reflecting surface (IRS). We derive a closed-form network spectral efficiency lower bound by considering spatial correlation at the BS and IRS. We demonstrate the importance of modelling spatial correlation by simplifying this lower bound for uncorrelated channels to show that the IRS capability to modify the wireless medium now is significantly impeded. This lower bound, which is a function of only the long-term channel statistics, is also used to maximize the non-concave global energy efficiency metric by optimally allocating the transmit powers, and by designing the IRS phases. We derive closed-form updates for optimizing the transmit powers using Lagrangian dual, Quadratic, and Dinkelbach’s transforms. We then optimize the IRS phases by using the projected gradient ascent algorithm. We numerically show that increasing the number of IRS elements can help a FD mMIMO BS outperform its half-duplex counterpart, which otherwise under-performs due to its limited ability to cancel various FD interferences." @default.
• W4287736227 created "2022-07-26" @default.
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• W4287736227 date "2022-06-01" @default.
• W4287736227 modified "2023-09-27" @default.
• W4287736227 title "Spatially-Correlated IRS-Aided Multiuser FD mMIMO Systems: Analysis and Optimization" @default.
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• W4287736227 doi "https://doi.org/10.1109/tcomm.2022.3161007" @default.
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