On Alternate Relaying With Improper Gaussian Signaling

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

doi:10.1109/lcomm.2016.2577029

On Alternate Relaying With Improper Gaussian Signaling

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

Authors

M. Gaafar

O. Amin

Dr Aissa Ikhlef aissa.ikhlef@durham.ac.uk
Associate Professor

A. Chaaban

M.-S. Alouini

Abstract

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.

Citation

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. https://doi.org/10.1109/lcomm.2016.2577029

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
DOI	https://doi.org/10.1109/lcomm.2016.2577029

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