Improper Gaussian signaling for the two-user broadcast channel treating interference as noise

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URI: http://hdl.handle.net/10902/18039
ISBN: 978-1-4799-8131-1
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Author
Lameiro Gutiérrez, ChristianAutoridad Unican; Santamaría Caballero, Luis IgnacioAutoridad Unican; Schreier, Peter J.
Date
2019
Derechos
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, Reino Unido, 2019, 4829-4833.
Publisher
Institute of Electrical and Electronics Engineers Inc.
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Palabras clave
Broadcast channel
Improper Gaussian signaling
Treating interference as noise
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.
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