Over-the-Air Aggregation for Federated Learning: Waveform Superposition and Prototype Validation

no code implementations • 27 Oct 2021 • Huayan Guo, Yifan Zhu, Haoyu Ma, Vincent K. N. Lau, Kaibin Huang, Xiaofan Li, Huabin Nong, Mingyu Zhou

In this paper, we develop an orthogonal-frequency-division-multiplexing (OFDM)-based over-the-air (OTA) aggregation solution for wireless federated learning (FL).

Federated Learning

Cascaded Channel Estimation for Intelligent Reflecting Surface Assisted Multiuser MISO Systems

1 code implementation • 20 Aug 2021 • Huayan Guo, Vincent K. N. Lau

This paper investigates the uplink cascaded channel estimation for intelligent-reflecting-surface (IRS)-assisted multi-user multiple-input-single-output systems.

Weighted Sum-Rate Maximization for Reconfigurable Intelligent Surface Aided Wireless Networks

2 code implementations • 27 Dec 2019 • Huayan Guo, Ying-Chang Liang, Jie Chen, Erik G. Larsson

Our objective is to maximize the weighted sum-rate (WSR) of all users by joint designing the beamforming at the access point (AP) and the phase vector of the RIS elements, while both the perfect channel state information (CSI) setup and the imperfect CSI setup are investigated.

Signal Processing

Weighted Sum-Rate Optimization for Intelligent Reflecting Surface Enhanced Wireless Networks

2 code implementations • 20 May 2019 • Huayan Guo, Ying-Chang Liang, Jie Chen, Erik G. Larsson

In addition, we consider a practical IRS assumption, in which the passive elements can only shift the incident signal to discrete phase levels.