The Capacity Region of the One-Sided Gaussian Interference Channel

TL;DR

This paper establishes the capacity region for the one-sided Gaussian interference channel in the weak interference regime, providing new bounds and a complete characterization for this class of channels.

Contribution

It introduces a novel representation of the Han-Kobayashi inner bound and a new outer bound, resulting in the first capacity region for this channel variant in the weak interference regime.

Findings

Capacity region characterized in the weak interference regime

New representation of Han-Kobayashi inner bound

Tight outer bound matching the inner bound

Abstract

The capacity region of the one-sided Gaussian interference channel is established in the weak interference regime. To characterize this region, a new representation of the Han-Kobayashi inner bound for the one-sided Gaussian interference channel is first given. Next, a new outer bound on the capacity region of this channel is introduced which is tight in the weak interference regime. This is the first capacity region for any variant of the interference channel in the weak interference regime.