The asymmetric DoF Region for the 3-user MxN Interference Channel

TL;DR

This paper characterizes the achievable degrees of freedom (DoF) region for a 3-user MIMO interference channel with asymmetric DoF distributions under constant, known channel conditions, considering equal and unequal antenna configurations.

Contribution

It provides the first explicit characterization of the asymmetric DoF region for the 3-user MIMO interference channel with different antenna setups.

Findings

Achievable DoF region for equal antennas at all nodes.

Achievable DoF region for unequal antenna configurations with M and N.

Insights into interference management for asymmetric MIMO channels.

Abstract

In this paper, the 3-user Gaussian MIMO interference channel is considered. The asymmetric distribution of the DoF, where different users have different number of DoF, is studied. Two cases are presented, the first is when all transmitters and receivers have equal number of antennas $M$, the other when the transmitters have $M$ antennas each, while the receivers have $N$ antennas each. It is assumed that the channel coefficients are constant and known to all transmitters and receivers. The region of the achievable DoF tuple $(d_1; d_2; d_3)$ is presented.