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13 papers · 1 filter
Near- and Far-Field Communications with Large Intelligent Surfaces
Andrea de Jesus Torres, Luca Sanguinetti, Emil Björnson
This paper studies the uplink spectral efficiency (SE) achieved by two single-antenna user equipments (UEs) communicating with a Large Intelligent Surface (LIS), defined as a plana…
Massively Distributed Antenna Systems with Non-Ideal Optical Fiber Front-hauls: A Promising Technology for 6G Wireless Communication Systems
Lisu Yu, Jingxian Wu, Andong Zhou +2
Employing massively distributed antennas brings radio access points (RAPs) closer to users, thus enables aggressive spectrum reuse that can bridge gaps between the scarce spectrum…
Residual Generation Using Physically-Based Grey-Box Recurrent Neural Networks For Engine Fault Diagnosis
Daniel Jung
Data-driven fault diagnosis is complicated by unknown fault classes and limited training data from different fault realizations. In these situations, conventional multi-class class…
Symbiotic Radio: Cognitive Backscattering Communications for Future Wireless Networks
Ying-Chang Liang, Qianqian Zhang, Erik G. Larsson +1
The heterogenous wireless services and exponentially growing traffic call for novel spectrum- and energy-efficient wireless communication technologies. In this paper, a new techniq…
Max-Min Optimal Beamforming for Cell-Free Massive MIMO
Andong Zhou, Jingxian Wu, Erik G. Larsson +1
This letter develops an optimum beamforming method for downlink transmissions in cell-free massive multiple-input multiple-output (MIMO) systems, which employ a massive number of d…
The Bussgang Decomposition of Non-Linear Systems: Basic Theory and MIMO Extensions
Özlem Tuğfe Demir, Emil Björnson
Many of the systems that appear in various signal processing applications are non-linear, for example, due to hardware impairments such as non-linear amplifiers and finite-resoluti…