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Paper detail

Smart Hybrid Beamforming and Pilot Assignment for 6G Cell-Free Massive MIMO

This paper investigates Cell-Free massive MIMO networks, where each access point (AP) is equipped with a hybrid transceiver, reducing the complexity and cost compared to a fully digital transceiver. Asymptotic approximations for the spectral efficiency are derived for uplink and downlink. Capitalizing on these expressions, a max-min problem is formulated to optimize the (i) analog beamformer at the APs and (ii) pilot assignment. Simulations show that the optimization of these variables substantially increases the network performance.

preprint2023arXivOpen access
Carles Diaz-VilorAlexei AshikhminHong Yang
math.ITInformation Theoryeess.SP
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Carles Diaz-VilorAlexei AshikhminHong Yang

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