Improper Gaussian Signaling for the Two-user Broadcast Channel Treating Interference as Noise
Christian Lameiro, Ignacio Santamaría, Peter J. Schreier
Abstract
Improper Gaussian signaling (IGS) has been shown to enlarge the rate region achievable by conventional proper Gaussian signaling (PGS) schemes in several interference-limited multiuser networks. In this work, we consider the 2-user broadcast channel (BC) when treating interference as noise "TIN" at every receiver. For this scenario, we derive a closed-form characterization of the rate region boundary with IGS. The Pareto-optimal points are achieved when at least one of the users employs maximally improper (rectilinear) signals. Differently from other interference-limited networks, our results show that IGS always outperforms PGS for the 2-user BC with TIN. Furthermore, IGS also enlarges the PGS rate region with time-sharing for this scenario.
BibTeX
@inproceedings{icassp2019_impropergaussian,
title = {Improper Gaussian Signaling for the Two-user Broadcast Channel Treating Interference as Noise},
author = {Christian Lameiro and Ignacio Santamaría and Peter J. Schreier},
booktitle = {ICASSP 2019},
year = {2019}
}