Robust Hybrid-Field Sparse Channel Estimation for Extremely Large-Scale MIMO Systems
An extremely large-scale multiple-input multipleoutput (XL-MIMO) system is a promising enabler for sixthgeneration (6G) wireless communications. Its hybrid-field channel exhibits a transition from near-field spherical wavefronts to far-field planar wavefronts, with the boundary defined by the Rayleigh distance. This du...