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Wirelessly connected devices can collaborately train a machine learning model using federated learning, where the aggregation of model updates occurs using over-the-air computation. Carrier frequency offset caused by imprecise clocks in…

Signal Processing · Electrical Eng. & Systems 2024-01-17 Martin Dahl , Erik G. Larsson

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

We propose a federated version of adaptive gradient methods, particularly AdaGrad and Adam, within the framework of over-the-air model training. This approach capitalizes on the inherent superposition property of wireless channels,…

Machine Learning · Computer Science 2024-03-12 Chenhao Wang , Zihan Chen , Nikolaos Pappas , Howard H. Yang , Tony Q. S. Quek , H. Vincent Poor

Federated learning (FL) is an emerging paradigm that permits a large number of clients with heterogeneous data to coordinate learning of a unified global model without the need to share data amongst each other. A major challenge in…

Machine Learning · Computer Science 2023-11-16 Irene Tenison , Sai Aravind Sreeramadas , Vaikkunth Mugunthan , Edouard Oyallon , Irina Rish , Eugene Belilovsky

Federated learning (FL) is a promising solution to enable many AI applications, where sensitive datasets from distributed clients are needed for collaboratively training a global model. FL allows the clients to participate in the training…

Machine Learning · Computer Science 2022-05-09 Houssem Sifaou , Geoffrey Ye Li

To address the limitations of traditional over-the-air federated learning (OA-FL) such as limited server coverage and low resource utilization, we propose an OA-FL in MIMO cloud radio access network (MIMO Cloud-RAN) framework, where edge…

Information Theory · Computer Science 2023-05-18 Haoming Ma , Xiaojun Yuan , Zhi Ding

This paper introduces a federated learning framework that enables over-the-air computation via digital communications, using a new joint source-channel coding scheme. Without relying on channel state information at devices, this scheme…

Information Theory · Computer Science 2024-11-07 Seyed Mohammad Azimi-Abarghouyi , Lav R. Varshney

This paper investigates the problem of model aggregation in federated learning systems aided by multiple reconfigurable intelligent surfaces (RISs). The effective integration of computation and communication is achieved by over-the-air…

Information Theory · Computer Science 2021-07-09 Wanli Ni , Yuanwei Liu , Zhaohui Yang , Hui Tian , Xuemin Shen

Over-the-Air Federated Learning (OTA-FL) is a privacy-preserving distributed learning mechanism, by aggregating updates in the electromagnetic channel rather than at the server. A critical research gap in existing OTA-FL research is the…

Machine Learning · Computer Science 2025-05-14 Jinsheng Yuan , Zhuangkun Wei , Weisi Guo

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

Federated learning (FL) aims to train machine learning models in the decentralized system consisting of an enormous amount of smart edge devices. Federated averaging (FedAvg), the fundamental algorithm in FL settings, proposes on-device…

Machine Learning · Computer Science 2020-12-17 Xin Yao , Tianchi Huang , Rui-Xiao Zhang , Ruiyu Li , Lifeng Sun

Second-order federated learning (FL) algorithms offer faster convergence than their first-order counterparts by leveraging curvature information. However, they are hindered by high computational and storage costs, particularly for…

Machine Learning · Computer Science 2025-01-15 Abdulmomen Ghalkha , Chaouki Ben Issaid , Mehdi Bennis

Federated Learning (FL) enables collaborative model training across distributed devices while preserving data privacy. Nonetheless, the heterogeneity of edge devices often leads to inconsistent performance of the globally trained models,…

Machine Learning · Computer Science 2025-05-13 Lin Wang , Zhichao Wang , Ye Shi , Sai Praneeth Karimireddy , Xiaoying Tang

We examine federated learning (FL) with over-the-air (OTA) aggregation, where mobile users (MUs) aim to reach a consensus on a global model with the help of a parameter server (PS) that aggregates the local gradients. In OTA FL, MUs train…

Machine Learning · Computer Science 2022-07-20 Ozan Aygün , Mohammad Kazemi , Deniz Gündüz , Tolga M. Duman

Federated learning (FL), which has gained increasing attention recently, enables distributed devices to train a common machine learning (ML) model for intelligent inference cooperatively without data sharing. However, problems in practical…

Machine Learning · Computer Science 2022-11-01 Yujie Zhou , Zhidu Li , Tong Tang , Ruyan Wang

In this paper, a new learning algorithm for Federated Learning (FL) is introduced. The proposed scheme is based on a weighted gradient aggregation using two-step optimization to offer a flexible training pipeline. Herein, two different…

Machine Learning · Computer Science 2021-06-15 Dimitrios Dimitriadis , Kenichi Kumatani , Robert Gmyr , Yashesh Gaur , Sefik Emre Eskimez

Federated Edge Learning (FEEL) is a distributed machine learning technique where each device contributes to training a global inference model by independently performing local computations with their data. More recently, FEEL has been…

Machine Learning · Computer Science 2022-11-01 Saeed Razavikia , Jaume Anguera Peris , Jose Mairton B. da Silva , Carlo Fischione

Federated learning (FL) has been recognized as a promising distributed learning paradigm to support intelligent applications at the wireless edge, where a global model is trained iteratively through the collaboration of the edge devices…

Information Theory · Computer Science 2022-05-20 Wei Guo , Chuan Huang , Xiaoqi Qin , Lian Yang , Wei Zhang

To enable communication-efficient federated learning (FL), this paper studies an unmanned aerial vehicle (UAV)-enabled FL system, where the UAV coordinates distributed ground devices for a shared model training. Specifically, by exploiting…

Signal Processing · Electrical Eng. & Systems 2022-10-21 Min Fu , Yuanming Shi , Yong Zhou

One of the key challenges towards the deployment of over-the-air federated learning (AirFL) is the design of mechanisms that can comply with the power and bandwidth constraints of the shared channel, while causing minimum deterioration to…

Information Theory · Computer Science 2023-05-19 Haifeng Wen , Hong Xing , Osvaldo Simeone