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We examined UWB-based indoor location in conjunction with a fingerprint technique in this work. We built a connection between the measured and real distances for the UWB indoor positioning system. This connection is used to produce a…

Signal Processing · Electrical Eng. & Systems 2022-04-19 Chenyu Wang , Zihuai Lin

To increase the quality of citizens' lives, we designed a personalized smart chair system to recognize sitting behaviors. The system can receive surface pressure data from the designed sensor and provide feedback for guiding the user…

Signal Processing · Electrical Eng. & Systems 2022-12-27 Jianquan Wang , Basim Hafidh , Haiwei Dong , Abdulmotaleb El Saddik

Wireless signal recognition (WSR) is crucial in modern and future wireless communication networks since it aims to identify properties of the received signal. Although many deep learning-based WSR models have been developed, they still rely…

Signal Processing · Electrical Eng. & Systems 2024-04-04 Hao Zhang , Fuhui Zhou , Qihui Wu , Naofal Al-Dhahir

People spend a substantial part of their lives at rest in bed. 3D human pose and shape estimation for this activity would have numerous beneficial applications, yet line-of-sight perception is complicated by occlusion from bedding. Pressure…

Computer Vision and Pattern Recognition · Computer Science 2020-04-03 Henry M. Clever , Zackory Erickson , Ariel Kapusta , Greg Turk , C. Karen Liu , Charles C. Kemp

Sleep staging plays an important role on the diagnosis of sleep disorders. In general, experts classify sleep stages manually based on polysomnography (PSG), which is quite time-consuming. Meanwhile, the acquisition process of multiple…

Machine Learning · Computer Science 2021-08-17 Huafeng Wang , Chonggang Lu , Qi Zhang , Zhimin Hu , Xiaodong Yuan , Pingshu Zhang , Wanquan Liu

Sleep stage classification is essential for sleep assessment and disease diagnosis. Although previous attempts to classify sleep stages have achieved high classification performance, several challenges remain open: 1) How to effectively…

Signal Processing · Electrical Eng. & Systems 2021-09-07 Ziyu Jia , Youfang Lin , Jing Wang , Xiaojun Ning , Yuanlai He , Ronghao Zhou , Yuhan Zhou , Li-wei H. Lehman

Quasi-static ultrasound elastography (USE) is an imaging modality that consists of determining a measure of deformation (i.e.strain) of soft tissue in response to an applied mechanical force. The strain is generally determined by estimating…

Image and Video Processing · Electrical Eng. & Systems 2020-11-05 Rémi Delaunay , Yipeng Hu , Tom Vercauteren

We consider the problem of obtaining relative location information between two wireless nodes from the differences in their ultra-wideband (UWB) channels to observer nodes. Our approach focuses on the delays of multipath components (MPCs)…

Signal Processing · Electrical Eng. & Systems 2022-06-08 Gregor Dumphart , Robin Kramer , Armin Wittneben

The classification of sleep stages is a pivotal aspect of diagnosing sleep disorders and evaluating sleep quality. However, the conventional manual scoring process, conducted by clinicians, is time-consuming and prone to human bias. Recent…

Human-Computer Interaction · Computer Science 2024-05-14 Cheol-Hui Lee , Hakseung Kim , Hyun-jee Han , Min-Kyung Jung , Byung C. Yoon , Dong-Joo Kim

Human pose estimation (HPE) for 3D skeleton reconstruction in telemedicine has long received attention. Although the development of deep learning has made HPE methods in telemedicine simpler and easier to use, addressing low accuracy and…

Computer Vision and Pattern Recognition · Computer Science 2022-10-12 Boce Hu , Chenfei Zhu , Xupeng Ai , Sunil K. Agrawal

Sleep staging is essential for diagnosing sleep disorders and assessing neurological health. Existing automatic methods typically extract features from complex polysomnography (PSG) signals and train domain-specific models, which often lack…

Signal Processing · Electrical Eng. & Systems 2025-09-30 Jianheng Zhou , Chenyu Liu , Jinan Zhou , Yi Ding , Yang Liu , Haoran Luo , Ziyu Jia , Xinliang Zhou

Non-invasive brain-computer interfaces help the subjects to control external devices by brain intentions. The multi-class classification of upper limb movements can provide external devices with more control commands. The onsets of the…

Human-Computer Interaction · Computer Science 2022-12-20 Hao Jia , Feng Duan , Yu Zhang , Zhe Sun , Jordi Sole-Casals

Inter-agent relative localization is critical for any multi-robot system operating in the absence of external positioning infrastructure or prior environmental knowledge. We propose a novel inter-agent relative 2D pose estimation system…

Robotics · Computer Science 2022-03-22 Andrew Fishberg , Jonathan P. How

We propose a semi-supervised network for wide-angle portraits correction. Wide-angle images often suffer from skew and distortion affected by perspective distortion, especially noticeable at the face regions. Previous deep learning based…

Computer Vision and Pattern Recognition · Computer Science 2022-04-05 Fushun Zhu , Shan Zhao , Peng Wang , Hao Wang , Hua Yan , Shuaicheng Liu

This work presents a new spiking neural network (SNN)-based approach for user equipment-base station (UE-BS) association in non-terrestrial networks (NTNs). With the introduction of UAV's in wireless networks, the system architecture…

Signal Processing · Electrical Eng. & Systems 2025-08-06 Vasileios Kouvakis , Stylianos E. Trevlakis , Ioannis Arapakis , Alexandros-Apostolos A. Boulogeorgos

Respiratory diseases account for a significant portion of global mortality. Affordable and early detection is an effective way of addressing these ailments. To this end, a low-cost commercial off-the-shelf (COTS), IEEE 802.15.4z standard…

Signal Processing · Electrical Eng. & Systems 2025-10-22 Anton Lambrecht , Stijn Luchie , Jaron Fontaine , Ben Van Herbruggen , Adnan Shahid , Eli De Poorter

This paper presents a novel testbed designed for 5th-Generation (5G) positioning using Universal Software Radio Peripherals (USRPs). The testbed integrates multiple units: an Operation Unit for test management, a User Unit equipped with an…

Signal Processing · Electrical Eng. & Systems 2025-06-10 Thodoris Spanos , Fran Fabra , José A. López-Salcedo , Gonzalo Seco-Granados , Nikos Kanistras , Ivan Lapin , Vassilis Paliouras

Sparse wearable inertial measurement units (IMUs) have gained popularity for estimating 3D human motion. However, challenges such as pose ambiguity, data drift, and limited adaptability to diverse bodies persist. To address these issues, we…

Human pose estimation is a fundamental yet challenging task in computer vision. Although deep learning techniques have made great progress in this area, difficult scenarios (e.g., invisible keypoints, occlusions, complex multi-person…

Computer Vision and Pattern Recognition · Computer Science 2020-04-14 Yabo Xiao , Dongdong Yu , Xiaojuan Wang , Tianqi Lv , Yiqi Fan , Lingrui Wu

Ultra-wideband (UWB) communications have gained popularity in recent years for being able to provide distance measurements and localization with high accuracy, which can enhance the capabilities of devices in the Internet of Things (IoT).…

Signal Processing · Electrical Eng. & Systems 2021-11-04 L. Flueratoru , S. Wehrli , M. Magno , E. S. Lohan , D. Niculescu