Beamforming Design and Power Allocation Aided by Relay Selection in Cooperative Massive MIMO Network Jamal A. Hassan (  jamal.hassan@su.edu.krd ) University of Salahaddin MJ. Ghoreishian Research Article Keywords: Massive MIMO, Zero-Forcing, block diagonalization, convex optimization, cooperative MIMO Posted Date: May 31st, 2023 DOI: https://doi.org/10.21203/rs.3.rs-2994350/v1 License:   This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Additional Declarations: No competing interests reported.