Efficient Fully-Digital Beamformer for Very-Large Non-Uniform Arrays using Hexagonal Transformations. - Juan Carlos Merlano Duncan; Juan Andrés Vásquez-Peralvo; Vibhun Singh; Vu Nguyen Ha; Luis Manuel Garcés Socarrás; Ti Ti Nguyen; Raudel Cuiman; Jorge Luis González Rios; Symeon Chatzinotas; Björn Ottersten 001 (CAMSAP, 2025)