As is well known, sparse multiple-input–multiple-output (MIMO) arrays have obvious superiorities in array aperture, degrees of freedom, and mutual coupling effects over uniform MIMO arrays. In this ...

A millimeter wave (mmWave) line-of-sight (LOS) multi-input-multioutput (MIMO) system is studied, where spatial multiplexing is achieved through LOS transmissions in near-field areas. A comprehensive ...