Skip to main content

Research Repository

Advanced Search

On Alternate Relaying With Improper Gaussian Signaling

Gaafar, M.; Amin, O.; Ikhlef, A.; Chaaban, A.; Alouini, M.-S.

On Alternate Relaying With Improper Gaussian Signaling Thumbnail


M. Gaafar

O. Amin

A. Chaaban

M.-S. Alouini


In this letter, we investigate the potential benefits of adopting improper Gaussian signaling (IGS) in a two-hop alternate relaying (AR) system. Given the known benefits of using IGS in interference-limited networks, we propose to use IGS to relieve the inter-relay interference (IRI) impact on the AR system assuming no channel state information is available at the source. In this regard, we assume that the two relays use IGS and the source uses proper Gaussian signaling (PGS). Then, we optimize the degree of impropriety of the relays signal, measured by the circularity coefficient, to maximize the total achievable rate. Simulation results show that using IGS yields a significant performance improvement over PGS, especially when the first hop is a bottleneck due to weak source-relay channel gains and/or strong IRI.


Gaafar, M., Amin, O., Ikhlef, A., Chaaban, A., & Alouini, M. (2016). On Alternate Relaying With Improper Gaussian Signaling. IEEE Communications Letters, 20(8), 1683-1686.

Journal Article Type Article
Acceptance Date May 30, 2016
Online Publication Date Jun 6, 2016
Publication Date Aug 10, 2016
Deposit Date Nov 23, 2016
Publicly Available Date Aug 1, 2017
Journal IEEE Communications Letters
Print ISSN 1089-7798
Electronic ISSN 1558-2558
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 20
Issue 8
Pages 1683-1686


Accepted Journal Article (486 Kb)

Copyright Statement
© 2016 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.

You might also like

Downloadable Citations