This work conceives dictionary-learning (DL)-based sparse channel estimation schemes for multi-user Terahertz (THz) hybrid MIMO systems incorporating also non-idealities such as hardware impairments and beam-squint effect. Due to the presence of large antenna arrays coupled with frequency selectivity. beam squint effect is significant in THz systems. Moreover. https://countryscenesaddleryandpetsuppliers.shop/product-category/hair-on-cowhide-headstalls/