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With the explosive growth of data and wireless devices, federated learning (FL) over wireless medium has emerged as a promising technology for large-scale distributed intelligent systems. Yet, the urgent demand for ubiquitous intelligence…

Signal Processing · Electrical Eng. & Systems 2022-05-09 Chenxi Zhong , Huiyuan Yang , Xiaojun Yuan

In this paper, the performance optimization of federated learning (FL), when deployed over a realistic wireless multiple-input multiple-output (MIMO) communication system with digital modulation and over-the-air computation (AirComp) is…

Information Theory · Computer Science 2024-04-26 Sihua Wang , Mingzhe Chen , Cong Shen , Changchuan Yin , Christopher G. Brinton

Federated learning (FL) is an emerging machine learning paradigm for training models across multiple edge devices holding local data sets, without explicitly exchanging the data. Recently, over-the-air (OTA) FL has been suggested to reduce…

Signal Processing · Electrical Eng. & Systems 2023-03-31 Tomer Gafni , Kobi Cohen , Yonina C. Eldar

Frequent parameter exchanges between clients and the edge server incur substantial communication overhead, posing a critical bottleneck in federated learning (FL). By exploiting the superposition property of wireless waveforms, over-the-air…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-18 Ruihao Du , Jiaqi Zhu , Zeshen Li , Howard H. Yang

Federated learning (FL) has been considered a promising privacy preserving distributed edge learning framework. Over-the-air computation (AirComp) leveraging analog transmission enables the aggregation of local updates directly over-the-air…

Signal Processing · Electrical Eng. & Systems 2026-04-06 Lorenz Bielefeld , Paul Zheng , Oner Hanay , Yao Zhu , Yulin Hu , Anke Schmeink

Federated learning facilitates collaborative model training across multiple clients while preserving data privacy. However, its performance is often constrained by limited communication resources, particularly in systems supporting a large…

Machine Learning · Computer Science 2025-08-26 Jiaqi Zhu , Bikramjit Das , Yong Xie , Nikolaos Pappas , Howard H. Yang

This paper considers over-the-air federated learning (OTA-FL). OTA-FL exploits the superposition property of the wireless medium, and performs model aggregation over the air for free. Thus, it can greatly reduce the communication cost…

Machine Learning · Computer Science 2022-05-13 Haibo Yang , Peiwen Qiu , Jia Liu , Aylin Yener

This paper studies power-efficient uplink transmission design for federated learning (FL) that employs over-the-air analog aggregation and multi-antenna beamforming at the server. We jointly optimize device transmit weights and receive…

Information Theory · Computer Science 2025-01-31 Faeze Moradi Kalarde , Min Dong , Ben Liang , Yahia A. Eldemerdash Ahmed , Ho Ting Cheng

In this paper, we consider privacy aspects of wireless federated learning (FL) with Over-the-Air (OtA) transmission of gradient updates from multiple users/agents to an edge server. By exploiting the waveform superposition property of…

Machine Learning · Computer Science 2022-10-12 Jialing Liao , Zheng Chen , Erik G. Larsson

Federated learning (FL) enables mobile devices to collaboratively learn a shared prediction model while keeping data locally. However, there are two major research challenges to practically deploy FL over mobile devices: (i) frequent…

Machine Learning · Computer Science 2022-08-16 Liang Li , Chenpei Huang , Dian Shi , Hao Wang , Xiangwei Zhou , Minglei Shu , Miao Pan

In this paper, we consider communication-efficient over-the-air federated learning (FL), where multiple edge devices with non-independent and identically distributed datasets perform multiple local iterations in each communication round and…

Signal Processing · Electrical Eng. & Systems 2022-03-29 Yinan Zou , Zixin Wang , Xu Chen , Haibo Zhou , Yong Zhou

Federated learning (FL) has emerged as an appealing machine learning approach to deal with massive raw data generated at multiple mobile devices, {which needs to aggregate the training model parameter of every mobile device at one base…

Machine Learning · Computer Science 2023-08-21 Xuming An , Rongfei Fan , Shiyuan Zuo , Han Hu , Hai Jiang , Ning Zhang

Federated edge learning is a promising technology to deploy intelligence at the edge of wireless networks in a privacy-preserving manner. Under such a setting, multiple clients collaboratively train a global generic model under the…

Machine Learning · Computer Science 2023-02-27 Zihan Chen , Zeshen Li , Howard H. Yang , Tony Q. S. Quek

In this paper, we propose a hybrid learning framework that combines federated and split learning, termed semi-federated learning (SemiFL), in which over-the-air computation is utilized for gradient aggregation. A key idea is to…

Signal Processing · Electrical Eng. & Systems 2026-02-26 Jingheng Zheng , Hui Tian , Wanli Ni , Yang Tian , Ping Zhang

Distributed optimization concerns the optimization of a common function in a distributed network, which finds a wide range of applications ranging from machine learning to vehicle platooning. Its key operation is to aggregate all local…

Information Theory · Computer Science 2022-04-15 Zhenyi Lin , Yi Gong , Kaibin Huang

Over-the-air federated learning (OTA-FL) offers an exciting new direction over classical FL by averaging model weights using the physics of analog signal propagation. Since each participant broadcasts its model weights concurrently in time…

Federated learning (FL), as an emerging edge artificial intelligence paradigm, enables many edge devices to collaboratively train a global model without sharing their private data. To enhance the training efficiency of FL, various…

Machine Learning · Computer Science 2022-11-23 Wenzhi Fang , Ziyi Yu , Yuning Jiang , Yuanming Shi , Colin N. Jones , Yong Zhou

Leveraging over-the-air computations for model aggregation is an effective approach to cope with the communication bottleneck in federated edge learning. By exploiting the superposition properties of multi-access channels, this approach…

Machine Learning · Computer Science 2025-07-08 Jiaxing Li , Zihan Chen , Kai Fong Ernest Chong , Bikramjit Das , Tony Q. S. Quek , Howard H. Yang

This paper investigates an over-the-air federated learning (OTA-FL) system that employs fluid antennas (FAs) at an access point. The system enhances learning performance by leveraging the additional degrees of freedom provided by antenna…

Signal Processing · Electrical Eng. & Systems 2025-02-04 Mohsen Ahmadzadeh , Saeid Pakravan , Ghosheh Abed Hodtani , Ming Zeng , Jean-Yves Chouinard , Leslie A. Rusch

In this study, we propose using an over-the-air computation (OAC) scheme for the federated k-means clustering algorithm to reduce the per-round communication latency when it is implemented over a wireless network. The OAC scheme relies on…

Signal Processing · Electrical Eng. & Systems 2023-08-15 Alphan Sahin