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- W4385804932 abstract "We investigate the downlink outage performance of double-RIS-aided non-orthogonal multiple access (NOMA), where a near-BS and a near-users RISs setup are deployed. To extend the coverage to 360 degrees, we deploy a simultaneously transmitting and reflecting RIS (STAR-RIS) structure aiming to improve communication reliability for both indoor and outdoor users. New channel statistics for the end-to-end channel with Nakagami-m considering both the conventional-RIS and the STAR-RIS antenna elements features are derived using the moment-matching (MM) technique. The numerical results reveal that the double-RIS setup can outperform the single-RIS setups when the number of elements of STAR-RIS (R <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>S</inf> ) and conventional RIS (R <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</inf> ) is suitably adjusted. Moreover, when the link between the base station and the near-user RIS is in good condition, the double-RIS setup is outperformed by the single-RIS setup. Finally, the proposed analytical equations reveal to be very accurate under different channel and system configurations." @default.
- W4385804932 created "2023-08-15" @default.
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- W4385804932 date "2023-06-01" @default.
- W4385804932 modified "2023-10-14" @default.
- W4385804932 title "NOMA-aided double RIS under Nakagami-m fading: Channel and System Modelling" @default.
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- W4385804932 doi "https://doi.org/10.1109/vtc2023-spring57618.2023.10201072" @default.
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