Topological Interference Management with Reconfigurable Antennas

TL;DR

This paper investigates the maximum achievable symmetric degrees-of-freedom in interference networks with reconfigurable antennas, providing a characterization of topologies where half DoF is attainable and establishing bounds for general cases.

Contribution

It introduces a new analysis of interference networks with reconfigurable antennas, identifying topologies that achieve half symmetric DoF and deriving tight bounds for specific interference scenarios.

Findings

Half symmetric DoF is achievable in certain topologies.

A general upper bound on linear symmetric DoF is established.

The upper bound is tight when transmitters have at most two co-interferers.

Abstract

We study the symmetric degrees-of-freedom (DoF) of partially connected interference networks under linear coding strategies at transmitters without channel state information beyond topology. We assume that the receivers are equipped with reconfigurable antennas that can switch among their preset modes. In such a network setting, we characterize the class of network topologies in which half linear symmetric DoF is achievable. Moreover, we derive a general upper bound on the linear symmetric DoF for arbitrary network topologies. We also show that this upper bound is tight if the transmitters have at most two co-interferers.