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Terahertz inter-satellite links enable unprecedented sensing precision for Low Earth Orbit (LEO) constellations, yet face fundamental bounds from hardware impairments, pointing errors, and network interference. We develop a Network…

Signal Processing · Electrical Eng. & Systems 2025-10-23 Haofan Dong , Houtianfu Wang , Hanlin Cai , Ozgur B. Akan

Large-scale federated learning (FL) over wireless multiple access channels (MACs) has emerged as a crucial learning paradigm with a wide range of applications. However, its widespread adoption is hindered by several major challenges,…

Machine Learning · Computer Science 2024-11-01 Vineet Sunil Gattani , Junshan Zhang , Gautam Dasarathy

Federated learning (FL) involves several devices that collaboratively train a shared model without transferring their local data. FL reduces the communication overhead, making it a promising learning method in UAV-enhanced wireless networks…

Machine Learning · Computer Science 2023-09-01 Mariam Yahya , Setareh Maghsudi , Slawomir Stanczak

For the demonstration of ultra-wideband bandwidth and pencil-beamforming, the terahertz (THz)-band has been envisioned as one of the key enabling technologies for the sixth generation networks. However, the acquisition of the THz channel…

Signal Processing · Electrical Eng. & Systems 2023-04-04 Ahmet M. Elbir , Wei Shi , Anastasios K. Papazafeiropoulos , Pandelis Kourtessis , Symeon Chatzinotas

In this paper, we investigate the joint impact of misalignment fading and local oscillator (LO) phase noise (PHN) in multi-carrier terahertz (THz) wireless systems. In more detail, after establishing a suitable system model that takes into…

Information Theory · Computer Science 2019-07-22 Evangelos N. Papsotiriou , Alexandros-Apostolos A. Boulogeorgos , Angeliki Alexiou

Terahertz ultra-massive multiple-input multiple-output (THz UM-MIMO) is envisioned as one of the key enablers of 6G wireless systems. Due to the joint effect of its array aperture and small wavelength, the near-field region of THz UM-MIMO…

Signal Processing · Electrical Eng. & Systems 2023-02-28 Wentao Yu , Yifei Shen , Hengtao He , Xianghao Yu , Jun Zhang , Khaled B. Letaief

The future of machine learning lies in moving data collection along with training to the edge. Federated Learning, for short FL, has been recently proposed to achieve this goal. The principle of this approach is to aggregate models learned…

Machine Learning · Computer Science 2023-07-13 Adnan Ben Mansour , Gaia Carenini , Alexandre Duplessis

Federated Learning (FL) is a well-known framework for successfully performing a learning task in an edge computing scenario where the devices involved have limited resources and incomplete data representation. The basic assumption of FL is…

Machine Learning · Computer Science 2023-12-08 Lorenzo Valerio , Chiara Boldrini , Andrea Passarella , János Kertész , Márton Karsai , Gerardo Iñiguez

Terahertz (THz) communication is considered one of the most critical technologies for 6G because of its abundant bandwidth. To compensate the high propagation of THz, analog/digital hybrid precoding for THz massive multiple input multiple…

Signal Processing · Electrical Eng. & Systems 2025-07-15 Yang Wang , Chuang Yang , Mugen Peng

Terahertz (THz) band contains abundant spectrum resources that can offer ultra-high data rates. However, due to the THz band's inherent characteristics, i.e., low penetrability, high path loss, and non-negligible molecular absorption…

Networking and Internet Architecture · Computer Science 2021-03-25 Chao Wang , Young Jin Chun

Terahertz (THz) wireless communication is envisioned as a promising technology, which is capable of providing ultra-high-rate transmission up to Terabit per second. However, some hardware imperfections, which are generally neglected in the…

Signal Processing · Electrical Eng. & Systems 2021-06-24 Tianqi Mao , Zhaocheng Wang

Federated learning (FL) is a promising paradigm that enables collaboratively learning a shared model across massive clients while keeping the training data locally. However, for many existing FL systems, clients need to frequently exchange…

Networking and Internet Architecture · Computer Science 2023-01-18 Qiong Wu , Xu Chen , Tao Ouyang , Zhi Zhou , Xiaoxi Zhang , Shusen Yang , Junshan Zhang

We consider a many-to-one wireless architecture for federated learning at the network edge, where multiple edge devices collaboratively train a model using local data. The unreliable nature of wireless connectivity, together with…

Networking and Internet Architecture · Computer Science 2021-02-17 Junshan Zhang , Na Li , Mehmet Dedeoglu

Federated learning (FL) offers a privacy-preserving collaborative approach for training models in wireless networks, with channel estimation emerging as a promising application. Despite extensive studies on FL-empowered channel estimation,…

Machine Learning · Computer Science 2024-07-31 Zexin Fang , Bin Han , Hans D. Schotten

Federated Learning (FL) is a promising privacy-preserving distributed learning framework where a server aggregates models updated by multiple devices without accessing their private datasets. Hierarchical FL (HFL), as a device-edge-cloud…

Machine Learning · Computer Science 2023-05-17 Xiaonan Liu , Shiqiang Wang , Yansha Deng , Arumugam Nallanathan

Federated Learning (FL) is a widely embraced paradigm for distilling artificial intelligence from distributed mobile data. However, the deployment of FL in mobile networks can be compromised by exposure to interference from neighboring…

Machine Learning · Computer Science 2024-11-25 Zhanwei Wang , Kaibin Huang , Yonina C. Eldar

Terahertz (THz) communication has emerged as a key enabler for sixth-generation (6G) networks, offering ultrawide bandwidths to support data-intensive applications such as holographic telepresence and immersive extended reality. Recent…

Signal Processing · Electrical Eng. & Systems 2026-05-13 Talha Rahman , Murat Uysal

Federated learning (FL) is a promising learning paradigm that can tackle the increasingly prominent isolated data islands problem while keeping users' data locally with privacy and security guarantees. However, FL could result in…

Information Theory · Computer Science 2022-03-30 Peng Yang , Yuning Jiang , Ting Wang , Yong Zhou , Yuanming Shi , Colin N. Jones

Wireless embedded edge devices are ubiquitous in our daily lives, enabling them to gather immense data via onboard sensors and mobile applications. This offers an amazing opportunity to train machine learning (ML) models in the realm of…

Information Theory · Computer Science 2023-12-15 Varun Laxman Muttepawar , Arjun Mehra , Zubair Shaban , Ranjitha Prasad , Harshan Jagadeesh

Federated Learning (FL) enables collaborative model training across distributed clients while preserving data privacy. While existing approaches for aggregating client-specific classification heads and adapted backbone parameters require…

Machine Learning · Computer Science 2025-09-16 Cosimo Fiorini , Matteo Mosconi , Pietro Buzzega , Riccardo Salami , Simone Calderara