Favorable Propagation for Massive MIMO with Circular and Cylindrical Antenna Arrays

TL;DR

This paper proves that massive MIMO systems with circular and cylindrical antenna arrays exhibit favorable propagation properties asymptotically in LOS environments, using novel mathematical techniques.

Contribution

It introduces a new analytical method employing Bessel function expansion and bounding techniques to demonstrate favorable propagation in specific array geometries.

Findings

Favorable propagation holds asymptotically in LOS environments for these arrays.

The analysis applies under fixed antenna spacing and mild conditions.

New mathematical tools simplify the understanding of inter-user interference.

Abstract

Massive MIMO systems with uniform circular and cylindrical antenna arrays are studied. Favorable propagation property is rigorously shown to hold asymptotically in LOS environment for a fixed antenna spacing and under some mild conditions. The analysis is based on a novel method using a Bessel function expansion, a new bounding technique and a simplified representation of inter-user interference for array geometries obeying Kronecker structure.