On Alternate Relaying With Improper Gaussian Signaling

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

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
• Public URL: https://durham-repository.worktribe.com/output/1369852