2022/10/11 by Carles Díaz-Vilor, Diaz-Vilor, Carles, Alexei Ashikhmin +3
Engineering · Computer Science · #Advanced MIMO Systems Optimization #Millimeter-Wave Propagation and Modeling #Cooperative Communication and Network Coding
paper · pdf · doi:10.48550/arxiv.2210.05055
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.