Multi-Cell Massive MIMO in LoS

TL;DR

This paper analyzes multi-cell Massive MIMO systems in LoS environments, deriving explicit SINR formulas for different processing schemes and power control strategies, with numerical validation.

Contribution

It provides explicit formulas for SINR and power control in multi-cell LoS Massive MIMO, a setting with no inter-cell cooperation.

Findings

Explicit SINR formulas for MR and ZF processing

Power control strategies to meet SINR targets

Numerical example validating the formulas

Abstract

We consider a multi-cell Massive MIMO system in a line-of-sight (LoS) propagation environment, for which each user is served by one base station, with no cooperation among the base stations. Each base station knows the channel between its service antennas and its users, and uses these channels for precoding and decoding. Under these assumptions we derive explicit downlink and uplink effective SINR formulas for maximum-ratio (MR) processing and zero-forcing (ZF) processing. We also derive formulas for power control to meet pre-determined SINR targets. A numerical example demonstrating the usage of the derived formulas is provided.