Orthogonal-beam-space massive-MIMO array

This paper investigates an alternative massive-MIMO array concept. The proposed massive-MIMO architecture produces a set of well-defined, high-gain, orthogonal beams with relatively low beam coupling factors (BCF), covering the entire 2D angular space of the intended communications space. Since each beam is orthogonal with low beam coupling with respect to all other beams, these transmit beams are inherently independent and relatively uncorrelated. Use of these well-defined orthogonal beams as basis for all user links ensures beam orthogonality, low interference among users, and acceptable beam patterns in all user distribution scenarios.