Author

Zain Ali

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Open access 2026

Graph Neural Network Enabled Resource Optimization for Tethered UAV Networks With Rotatable Directional Antennas

Rotatable directional antennas have recently emerged as a low-complexity alternative to conventional digital beamforming architectures for uncrewed aerial vehicle (UAV)-assisted wireless communication systems. In particular, tethered UAVs equipped with rotatable directional antennas can provide adaptive directional tra...

Abdulrahman Al-Hababi, Zain Ali, Rula Ammuri et al. · IEEE Open Journal of Vehicul... · 0 citations

Preprint Aug 2026

OHL-Assisted All-Optical Regenerative Relaying for Pointing-Impaired M-PAM Inter-Satellite Links

Rapid inter-satellite traffic growth in LEO constellations demands spectrally efficient, low-latency optical relaying. While amplify and forward (AF) relays are latency-efficient, they propagate noise; conversely, decode and forward (DF) relays suppress noise but incur significant complexity via O/E/O conversion. This...

Meysam Ghanbari, M. Dabiri, Zain Ali et al. · 0 citations

Open access 2026

HAP-Based Underlay Non-Terrestrial Networks With Imperfect CSI: Joint RSMA Transmission and Beyond-Diagonal RIS Beamforming

Simulation results demonstrate the effectiveness of the proposed framework and show that the BD-RIS-assisted system achieves up to a 45.2% sum-rate improvement compared with conventional single-connected RIS (SC-RIS) architectures while maintaining robustness against CSI uncertainty and satisfying all system constraint...

Zain Ali, Muhammad Asif, S. Althunibat et al. · IEEE Access · 0 citations