On Alternate Relaying with Improper Gaussian Signaling

Mohamed Gaafar; Osama Amin; Aissa Ikhlef; Anas Chaaban; Mohamed-Slim Alouini

doi:10.1109/LCOMM.2016.2577029

On Alternate Relaying with Improper Gaussian Signaling

Mohamed Gaafar, Osama Amin, Aissa Ikhlef, Anas Chaaban, Mohamed-Slim Alouini

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1683-1686
Number of pages	4
Journal	IEEE Communications Letters
Volume	20
Issue number	8
DOIs	https://doi.org/10.1109/LCOMM.2016.2577029
State	Published - Jun 6 2016

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10.1109/LCOMM.2016.2577029

https://repository.kaust.edu.sa/bitstream/10754/613015/1/07485889.pdf

Cite this

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title = "On Alternate Relaying with Improper Gaussian Signaling",

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.",

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T1 - On Alternate Relaying with Improper Gaussian Signaling

AU - Gaafar, Mohamed

AU - Amin, Osama

AU - Ikhlef, Aissa

AU - Chaaban, Anas

AU - Alouini, Mohamed-Slim

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2016/6/6

Y1 - 2016/6/6

N2 - 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.

AB - 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.

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JO - IEEE Communications Letters

JF - IEEE Communications Letters

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On Alternate Relaying with Improper Gaussian Signaling

Abstract

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