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Concurrent Spoofing-Jamming Attack in Massive MIMO Systems with a Full-Duplex Multi-Antenna Eavesdropper (2023)
Journal Article
Alageli, M., Ikhlef, A., & Chambers, J. (2023). Concurrent Spoofing-Jamming Attack in Massive MIMO Systems with a Full-Duplex Multi-Antenna Eavesdropper. IEEE Transactions on Vehicular Technology, 72(8), 10534 - 10547. https://doi.org/10.1109/tvt.2023.3262002

In this paper, we evaluate the ultimate severity of a concurrent spoofing-jamming un-detected attack from a fullduplex (FD) multi-antenna eavesdropper (EV) on a legitimate user equipment (UE) in a massive multiple-input multipleoutput (MIMO) system.... Read More about Concurrent Spoofing-Jamming Attack in Massive MIMO Systems with a Full-Duplex Multi-Antenna Eavesdropper.

Joint Design of Fronthaul and Access Links in Massive MIMO Multi-UAV-enabled CRANs (2021)
Journal Article
Huang, Y., & Ikhlef, A. (2021). Joint Design of Fronthaul and Access Links in Massive MIMO Multi-UAV-enabled CRANs. IEEE Wireless Communications Letters, 10(11), 2355-2359. https://doi.org/10.1109/lwc.2021.3100320

This paper proposes a novel architecture of multi-unmanned aerial vehicle (UAV)-enabled cloud radio access network (CRAN). In particular, we propose to deploy the UAVs as flying remote radio heads (RRHs) to serve ground user equipments (UEs). The bas... Read More about Joint Design of Fronthaul and Access Links in Massive MIMO Multi-UAV-enabled CRANs.

Optimal Downlink Transmission for Cell-Free SWIPT Massive MIMO Systems with Active Eavesdropping (2019)
Journal Article
Alageli, M., Ikhlef, A., Alsifiany, F., Abdullah, M., Chen, G., & Chambers, J. (2020). Optimal Downlink Transmission for Cell-Free SWIPT Massive MIMO Systems with Active Eavesdropping. IEEE Transactions on Information Forensics and Security, 50, 1983-1998. https://doi.org/10.1109/tifs.2019.2954748

This paper considers secure simultaneous wireless information and power transfer (SWIPT) in cell-free massive multiple-input multiple-output (MIMO) systems. The system consists of a large number of randomly (Poisson-distributed) located access points... Read More about Optimal Downlink Transmission for Cell-Free SWIPT Massive MIMO Systems with Active Eavesdropping.

Differential Downlink Transmission in Massive MU-MIMO Systems (2019)
Journal Article
Alsifiany, F., Ikhlef, A., Alageli, M., & Chambers, J. (2019). Differential Downlink Transmission in Massive MU-MIMO Systems. IEEE Access, 7, 86906-86919. https://doi.org/10.1109/access.2019.2925321

In this paper, a differential downlink transmission scheme is proposed for a massive multiple-input multiple-output (MIMO) system without explicit channel estimation. In particular, we use a downlink precoding technique combined with a different enco... Read More about Differential Downlink Transmission in Massive MU-MIMO Systems.

SWIPT massive MIMO systems with active eavesdropping (2018)
Journal Article
Alageli, M., Ikhlef, A., & Chambers, J. (2019). SWIPT massive MIMO systems with active eavesdropping. IEEE Journal on Selected Areas in Communications, 37(1), 233-247. https://doi.org/10.1109/jsac.2018.2872370

We consider the optimization of the downlink transmission for simultaneous wireless information and power transfer (SWIPT) in multi-cell massive multiple-input multiple-output systems. The system comprises a two-antenna active energy harvester (EH) w... Read More about SWIPT massive MIMO systems with active eavesdropping.

Exploiting High Rate Differential Algebraic STBC in Downlink Multiuser MIMO Systems (2018)
Journal Article
Alsifiany, F., Ikhlef, A., & Chambers, J. (2018). Exploiting High Rate Differential Algebraic STBC in Downlink Multiuser MIMO Systems. IET Communications, 12(17), 2188-2197. https://doi.org/10.1049/iet-com.2018.5208

This paper considers a multiuser multiple-input multiple-output (MIMO) space-time block coded system that operates at a high data rate with full diversity. In particular, they propose to use a full rate downlink algebraic transmission scheme combined... Read More about Exploiting High Rate Differential Algebraic STBC in Downlink Multiuser MIMO Systems.

Optimization for Maximizing Sum Secrecy Rate in MU-MISO SWIPT Systems (2017)
Journal Article
Alageli, M., Ikhlef, A., & Chambers, J. (2018). Optimization for Maximizing Sum Secrecy Rate in MU-MISO SWIPT Systems. IEEE Transactions on Vehicular Technology, 67(1), 537-553. https://doi.org/10.1109/tvt.2017.2740282

In this paper, we consider the sum secrecy rate maximization problem in multiuser multiple-input single-output (MUMISO) systems in the presence of multiple energy harvesters (EHs) which also have potential to wire-tap the information users (IUs). To... Read More about Optimization for Maximizing Sum Secrecy Rate in MU-MISO SWIPT Systems.

On Alternate Relaying With Improper Gaussian Signaling (2016)
Journal Article
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

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... Read More about On Alternate Relaying With Improper Gaussian Signaling.

Optimal MIMO Multicast Transceiver Design for Simultaneous Information and Power Transfer (2014)
Journal Article
Ikhlef, A. (2014). Optimal MIMO Multicast Transceiver Design for Simultaneous Information and Power Transfer. IEEE Communications Letters, 18(12), 2153-2156. https://doi.org/10.1109/lcomm.2014.2366097

We consider transceiver design for a MIMO multicast channel for simultaneous wireless information and power transfer. We assume that common information is intended for a subset of users, called information decoders (IDs), and the other users, called... Read More about Optimal MIMO Multicast Transceiver Design for Simultaneous Information and Power Transfer.

Power Allocation for Conventional and Buffer-Aided Link Adaptive Relaying Systems with Energy Harvesting Nodes (2014)
Journal Article
Ahmed, I., Ikhlef, A., Schober, R., & Mallik, R. (2014). Power Allocation for Conventional and Buffer-Aided Link Adaptive Relaying Systems with Energy Harvesting Nodes. IEEE Transactions on Wireless Communications, 13(3), 1182-1195. https://doi.org/10.1109/twc.2014.012314.121185

In this paper, we consider optimal power allocation for conventional and buffer-aided link adaptive energy harvesting (EH) relay systems, where an EH source communicates with the destination via an EH decode-and-forward relay {over fading channels}.... Read More about Power Allocation for Conventional and Buffer-Aided Link Adaptive Relaying Systems with Energy Harvesting Nodes.

Joint Source-Relay Optimization for Fixed Receivers in Multi-Antenna Multi-Relay Networks (2013)
Journal Article
Ikhlef, A., & Schober, R. (2014). Joint Source-Relay Optimization for Fixed Receivers in Multi-Antenna Multi-Relay Networks. IEEE Transactions on Wireless Communications, 13(1), 62-74. https://doi.org/10.1109/twc.2013.111013.121386

We jointly optimize the source and relay precoders for multi-antenna multi-relay networks employing a prefixed receiver. Prefixed receivers are of practical interest since they enable low complexity at the end-user's receiver as well as backward comp... Read More about Joint Source-Relay Optimization for Fixed Receivers in Multi-Antenna Multi-Relay Networks.