Benefits of improper signaling for overlay cognitive radio

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URI: http://hdl.handle.net/10902/18508
ISBN: 978-1-7281-0962-6
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Autoría
Lameiro Gutiérrez, ChristianAutoridad Unican; Santamaría Caballero, Luis IgnacioAutoridad Unican; Schreier, Peter J.
Fecha
2019
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© 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 Global Communications Conference (GLOBECOM), Waikoloa, HI, USA, 2019
Editorial
Institute of Electrical and Electronics Engineers Inc.
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Palabras clave
Improper Gaussian signaling
Interference channel
Overlay cognitive radio
Spectrum sharing
Resumen/Abstract
This paper considers improper Gaussian signaling (IGS) in an overlay cognitive radio scenario. We follow a protocol in which the secondary user (SU) uses part of its power to relay the message for the primary user (PU) and consider a simple yet illustrative 2-user scenario. We analyze two communication schemes depending on whether or not the PU cooperates with the SU and derive closed-form expressions for the optimal transmission parameters that maximize the SU rate while ensuring a specified minimum performance of the PU. Our numerical results show that IGS may significantly outperform proper signaling and that, interestingly, the cooperative approach provides negligible performance gains over its non-cooperative counterpart.
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