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The limited radio-frequency spectrum is a fundamental factor in the design of wireless communication systems. The ever increasing number of wireless devices and systems has led to a crowded spectrum and increased the demand for versatile…

Signal Processing · Electrical Eng. & Systems 2021-05-21 Sajjad Taravati , George V. Eleftheriades

So far, the environment has been considered as a source of fading, clutter, blockage, etc., with detrimental consequences for the efficiency and robustness of communication systems. However, the intense research developed toward beyond-5G…

In recent days, Artificial Neural Network (ANN) can be applied to a vast majority of fields including business, medicine, engineering, etc. The most popular areas where ANN is employed nowadays are pattern and sequence recognition, novelty…

Computer Vision and Pattern Recognition · Computer Science 2019-02-06 Md. Abu Bakr Siddique , Mohammad Mahmudur Rahman Khan , Rezoana Bente Arif , Zahidun Ashrafi

Reconfigurable intelligent surfaces (RISs) operate similarly to electromagnetic (EM) mirrors and remarkably go beyond Snell law to generate an applicable EM environment allowing for flexible adaptation and fostering sustainability in terms…

Systems and Control · Electrical Eng. & Systems 2023-12-25 Christos G. Tsinos , Alexandros-Apostolos A. Boulogeorgos , Theodoros A. Tsiftsis

The evolution toward next-generation intelligent sensing requires microwave systems to move beyond static detection and achieve high-speed and adaptive perception of dynamic scenes. However, the existing microwave sensing systems have…

Information Theory · Computer Science 2026-03-24 Qian Ma , Ze Gu , Zi Rui Feng , Qian Wen Wu , Yu Ming Ning , Zhi Qiao Han , Rui Si Li , Xinxin Gao , Tie Jun Cui

Facial recognition is a key enabling component for emerging Internet of Things (IoT) services such as smart homes or responsive offices. Through the use of deep neural networks, facial recognition has achieved excellent performance.…

Computer Vision and Pattern Recognition · Computer Science 2019-08-27 Chris Xiaoxuan Lu , Xuan Kan , Bowen Du , Changhao Chen , Hongkai Wen , Andrew Markham , Niki Trigoni , John Stankovic

Over almost five decades of development and improvement, Magnetic Resonance Imaging (MRI) has become a rich and powerful, non-invasive technique in medical imaging, yet not reaching its physical limits. Technical and physiological…

The visualization of pure phase objects by wavefront sensing has important applications ranging from surface profiling to biomedical microscopy, and generally requires bulky and complicated setups involving optical spatial filtering,…

Optics · Physics 2023-08-29 Jianing Liu , Hao Wang , Yuyu Li , Lei Tian , Roberto Paiella

This paper introduces a novel framework for Edge Inference (EI) that bypasses the conventional practice of treating the wireless channel as noise. We utilize Stacked Intelligent Metasurfaces (SIMs) to control wireless propagation, enabling…

Emerging Technologies · Computer Science 2025-09-24 Kyriakos Stylianopoulos , George C. Alexandropoulos

We explore the feasibility of AI assisted hand-gesture recognition using 802.11ad 60GHz (mmWave) technology in smartphones. Range-Doppler information (RDI) is obtained by using pulse Doppler radar for gesture recognition. We built a…

Information Theory · Computer Science 2022-11-15 Yuwei Ren , Jiuyuan Lu , Andrian Beletchi , Yin Huang , Ilia Karmanov , Daniel Fontijne , Chirag Patel , Hao Xu

As a rapidly emerging interdisciplinary field that intrinsically integrates microwave and photonics, microwave photonics (MWP) provides disruptive solutions to overcome the fundamental bandwidth of conventional electronic systems. By…

Optics · Physics 2026-05-21 Peng Li , Xihua Zou , Jia Ye , Wei Pan , Lianshan Yan

Reconfigurable intelligent surfaces (RISs) have flexible and exceptional performance in manipulating electromagnetic waves and customizing wireless channels. These capabilities enable them to provide a plethora of valuable activity-related…

Signal Processing · Electrical Eng. & Systems 2023-11-15 Xinyu Li , Jian Wei You , Ze Gu , Qian Ma , Long Chen , Jingyuan Zhang , Shi Jin , Tie Jun Cui

As the current standardization for the 5G networks nears completion, work towards understanding the potential technologies for the 6G wireless networks is already underway. One of these potential technologies for the 6G networks are…

Signal Processing · Electrical Eng. & Systems 2020-07-17 Hamidreza Taghvaee , Akshay Jain , Xavier Timoneda , Christos Liaskos , Sergi Abadal , Eduard Alarcón , Albert Cabellos-Aparicio

Avatar refers to a representative of a physical user in the virtual world that can engage in different activities and interact with other objects in metaverse. Simulating the avatar requires accurate human pose estimation. Though…

Computer Vision and Pattern Recognition · Computer Science 2022-08-23 Jianfei Yang , Yunjiao Zhou , He Huang , Han Zou , Lihua Xie

The fusion of metasurface antennas and computational imaging facilitates the design of microwave imaging systems which require no lenses, phase shifters or moving parts. The technique involves the generation of appropriately designed…

Applied Physics · Physics 2022-12-15 Toufiq M. Hossain , Andrey E. Miroshnichenko , David A. Powell

In the recent years, we observe a dramatic boost of research in photonics empowered by the concepts of machine learning and artificial intelligence. The corresponding photonic systems, to which this new methodology is applied, can range…

Optics · Physics 2022-04-04 Sergey Krasikov , Aaron Tranter , Andrey Bogdanov , Yuri Kivshar

Metasurfaces, or Reconfigurable Intelligent Surfaces (RISs), have emerged as a transformative technology for next-generation wireless systems, enabling digitally controlled manipulation of electromagnetic wave propagation. By turning the…

Cryptography and Security · Computer Science 2025-11-19 Paul Staat , Christof Paar , Swarun Kumar

Metasurfaces have emerged as transformative electromagnetic structures for wireless communications, enabling the real-time control over wave propagation, yielding potential for improved data rates, privacy, energy efficiency and even…

With the rapid development of wireless communication technology, wireless access points (AP) and internet of things (IoT) devices have been widely deployed in our surroundings. Various types of wireless signals (e.g., Wi-Fi, LoRa, LTE) are…

Signal Processing · Electrical Eng. & Systems 2022-06-27 Zheng Yang , Yi Zhang , Guoxuan Chi , Guidong Zhang

In the Edge Inference (EI) paradigm, where a Deep Neural Network (DNN) is split across the transceivers to wirelessly communicate goal-defined features in solving a computational task, the wireless medium has been commonly treated as a…

Machine Learning · Computer Science 2025-04-03 Kyriakos Stylianopoulos , Paolo Di Lorenzo , George C. Alexandropoulos