Dictionary-Learning (DL)-Based Sparse CSI Estimation in Multiuser Terahertz (THz) Hybrid MIMO Systems Under Hardware Impairments and Beam-Squint Effect
This work conceives dictionary-learning (DL)-based sparse channel estimation schemes for multi-user Terahertz (THz) hybrid MIMO systems incorporating also non-idealities Flower Shadow Box such as hardware impairments and beam-squint effect.Due to the presence of large antenna arrays coupled with frequency selectivity, beam squint effect is signific