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Author

Nikolaos Pappas

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Sep 2026

Experimental Demonstration of a Flexible Payload-Enabled Store & Forward NTN Architecture for Sparse LEO IoT

Non-Terrestrial Networks (NTNs) based on Low Earth Orbit (LEO) satellites are key enablers for extending 5G and future 6G connectivity beyond terrestrial coverage. However, supporting massive Cellular IoT (CIoT) services over sparse LEO constellations remains challenging due to intermittent and non-concurrent service a...

Timo Kellermann, R. P. Centelles, Víctor Montilla Gispert et al. · 0 citations
2026

Communication-Efficient Over-the-Air Federated Learning via Lightweight Gradient Compression

Integrating over-the-air computations into the model aggregation process of federated learning (FL) offers a promising solution to mitigate the communication bottleneck in FL model training. In this approach, all the clients modulate their intermediate parameters, such as gradients, onto the same set of orthogonal wave...

Jiaqi Zhu, H. Yang, Nikolaos Pappas et al. · 0 citations

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