Skip to main content

Research Repository

Advanced Search

Outputs (15)

System Design and Parameter Optimization for Remote Coverage from NOMA-based High-Altitude Platform Stations (HAPS) (2024)
Journal Article
Javed, S., & Alouini, M.-S. (2025). System Design and Parameter Optimization for Remote Coverage from NOMA-based High-Altitude Platform Stations (HAPS). IEEE Transactions on Wireless Communications, 24(2), 1387-1400. https://doi.org/10.1109/TWC.2024.3508872

Stratospheric solar-powered high-Altitude platform station (HAPS) can provide line-of-sight (LoS) communications to the ground users in its ultra-wide coverage area. This paper addresses the challenge of HAPS communication system design especially th... Read More about System Design and Parameter Optimization for Remote Coverage from NOMA-based High-Altitude Platform Stations (HAPS).

Optimizing Air-Borne Network-in-a-Box Deployment for Efficient Remote Coverage (2024)
Journal Article
Javed, S., Chen, Y., Alouini, M. S., & Wang, C. X. (2024). Optimizing Air-Borne Network-in-a-Box Deployment for Efficient Remote Coverage. IEEE Internet of Things Journal, 11(23), 38728-38743. https://doi.org/10.1109/JIOT.2024.3455439

Among many envisaged drivers for sixth generation (6G), one is from the United Nation's Sustainability Development Goals 2030 to eliminate digital inequality. Remote coverage in sparsely populated areas, difficult terrains or emergency scenarios requ... Read More about Optimizing Air-Borne Network-in-a-Box Deployment for Efficient Remote Coverage.

An Interdisciplinary Approach to Optimal Communication and Flight Operation of High-Altitude Long-Endurance Platforms (2023)
Journal Article
Javed, S., Alouini, M.-S., & Ding, Z. (2023). An Interdisciplinary Approach to Optimal Communication and Flight Operation of High-Altitude Long-Endurance Platforms. IEEE Transactions on Aerospace and Electronic Systems, 59(6), 8327-8341. https://doi.org/10.1109/taes.2023.3304615

Aerial communication platforms, stratospheric high-altitude platform stations (HAPSs), have the potential to provide/catalyze advanced mobile wireless communication services with their ubiquitous connectivity and ultrawide coverage radius. Recently,... Read More about An Interdisciplinary Approach to Optimal Communication and Flight Operation of High-Altitude Long-Endurance Platforms.

When Probabilistic Shaping Realizes Improper Signaling for Hardware Distortion Mitigation (2021)
Journal Article
Javed, S., Elzanaty, A., Amin, O., Shihada, B., & Alouini, M.-S. (2021). When Probabilistic Shaping Realizes Improper Signaling for Hardware Distortion Mitigation. IEEE Transactions on Communications, 69(8), 5028-5042. https://doi.org/10.1109/tcomm.2021.3074978

Hardware distortions (HWDs) render drastic effects on the performance of communication systems. They are recently proven to bear asymmetric signatures; and hence can be efficiently mitigated using improper Gaussian signaling (IGS), thanks to its addi... Read More about When Probabilistic Shaping Realizes Improper Signaling for Hardware Distortion Mitigation.

Asymmetric Modulation for Hardware Impaired Systems—Error Probability Analysis and Receiver Design (2019)
Journal Article
Javed, S., Amin, O., Ikki, S. S., & Alouini, M.-S. (2019). Asymmetric Modulation for Hardware Impaired Systems—Error Probability Analysis and Receiver Design. IEEE Transactions on Wireless Communications, 18(3), 1723-1738. https://doi.org/10.1109/twc.2019.2896058

Error probability study of hardware impaired (HWI) systems highly depends on the adopted model. Considering the distinct improper Gaussian features of HWI systems, captured by recent models, HWI-aware receivers are designed. An optimal maximum likeli... Read More about Asymmetric Modulation for Hardware Impaired Systems—Error Probability Analysis and Receiver Design.

Multiple Antenna Systems With Hardware Impairments: New Performance Limits (2018)
Journal Article
Javed, S., Amin, O., Ikki, S. S., & Alouini, M.-S. (2019). Multiple Antenna Systems With Hardware Impairments: New Performance Limits. IEEE Transactions on Vehicular Technology, 68(2), 1593-1606. https://doi.org/10.1109/tvt.2018.2888690

In this paper, we accurately model the impact of aggregate hardware impairments (HWIs) in communication systems as improper Gaussian signals (IGS), which can describe the asymmetric characteristics of different HWI sources. The proposed model encoura... Read More about Multiple Antenna Systems With Hardware Impairments: New Performance Limits.

Improper Gaussian Signaling for Hardware Impaired Multihop Full-Duplex Relaying Systems (2018)
Journal Article
Javed, S., Amin, O., Shihada, B., & Alouini, M.-S. (2019). Improper Gaussian Signaling for Hardware Impaired Multihop Full-Duplex Relaying Systems. IEEE Transactions on Communications, 67(3), 1858-1871. https://doi.org/10.1109/tcomm.2018.2884986

In this paper, we analyze the performance degradation of a multi-hop decode-and-forward full-duplex relaying system caused by the residual self-interference (RSI) and hardware distortions (HWD) imposed by the FDR operation and imperfect hardware, res... Read More about Improper Gaussian Signaling for Hardware Impaired Multihop Full-Duplex Relaying Systems.

On the Achievable Rate of Hardware-Impaired Transceiver Systems (2017)
Presentation / Conference Contribution
Javed, S., Amin, O., Ikki, S. S., & Alouini, M.-S. (2017, December). On the Achievable Rate of Hardware-Impaired Transceiver Systems. Presented at 2017 IEEE Global Communications Conference (GLOBECOM 2017), Singapore

In this paper, we accurately model the transceiver hardware impairments (HWIs) of multiple-input multiple-output (MIMO) systems considering different HWI stages at transmitter and receiver. The proposed novel statistical model shows that transceiver... Read More about On the Achievable Rate of Hardware-Impaired Transceiver Systems.