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- W4387448978 abstract "We provide accurate approximations of the sum-rate capacity of an opportunistic time-sharing downlink, when a reconfigurable intelligent surface (RIS) assists the transmission from a single-antenna base station (BS) to single-antenna user equipments (UEs). We consider the fading effects of both the direct (i.e., BS-to-UEs) and reflection (i.e, BS-to-RIS-to-UEs) links, by developing two approximations: the former one is based on hardening of the reflection channel for large values of the number of meta-atoms; the latter one relies on the distribution of the sum of Nakagami variates and does not require channel hardening. Our derivations show the dependence of the sum-rate capacity as a function of both the number of users and the number of meta-atoms, as well as to establish a comparison with a downlink without an RIS. Numerical results corroborate the accuracy and validity of the mathematical analysis." @default.
- W4387448978 created "2023-10-10" @default.
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- W4387448978 date "2023-01-01" @default.
- W4387448978 modified "2023-10-11" @default.
- W4387448978 title "On the Capacity of Opportunistic Time-Sharing Downlink with a Reconfigurable Intelligent Surface" @default.
- W4387448978 doi "https://doi.org/10.1109/lcomm.2023.3323094" @default.
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