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This paper investigates an uplink user equipment (UE) location and orientation estimation problem in an indoor rich-scattering environment (RSE) for a multiple-input-multiple-output (MIMO) narrowband reconfigurable intelligent surfaces…

Signal Processing · Electrical Eng. & Systems 2026-04-21 Anum Umer , Ivo Müürsepp , Muhammad Mahtab Alam

Spectrum sensing enables cognitive radio systems to detect unused portions of the radio spectrum and then use them while avoiding interferences to the primary users. Energy detection is one of the most used techniques for spectrum sensing…

Signal Processing · Electrical Eng. & Systems 2018-03-15 Youness Arjoune

Reconfigurable intelligent surface (RIS) is a promising solution to deal with the blockage-sensitivity of millimeter wave band and reduce the high energy consumption caused by network densification. However, deploying large scale RISs may…

Information Theory · Computer Science 2024-02-12 Yining Xu , Sheng Zhou

Cognitive radio has been proposed to alleviate the scarcity of available spectrum caused by the significant demand for wideband services and the fragmentation of spectrum resources. However, sensing performance is quite poor due to the low…

Information Theory · Computer Science 2023-10-24 Hao Xie , Dong Li , Bowen Gu

Incomplete multi-view clustering presents significant challenges due to missing views. Although many existing graph-based methods aim to recover missing instances or complete similarity matrices with promising results, they still face…

Machine Learning · Computer Science 2025-01-22 Xinxin Wang , Yongshan Zhang , Yicong Zhou

Robust and privacy-preserving indoor scene understanding remains a fundamental open problem. While optical sensors such as RGB and LiDAR offer high spatial fidelity, they suffer from severe occlusions and introduce privacy risks in indoor…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Kaichen Zhou , Laura Dodds , Sayed Saad Afzal , Fadel Adib

High-precision localization and environmental sensing are essential for a new wave of applications, ranging from industrial automation and autonomous systems to augmented reality and remote healthcare. Conventional wireless methods,…

Future wireless communication networks are expected to be smarter and more aware of their surroundings, enabling a wide range of context-aware applications. Reconfigurable intelligent surfaces (RISs) are set to play a critical role in…

Information Theory · Computer Science 2025-03-13 Yixuan Huang , Jie Yang , Chao-Kai Wen , Shi Jin

Edge computing enables data processing closer to the source, significantly reducing latency, an essential requirement for real-time vision-based analytics such as object detection in surveillance and smart city environments. However, these…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-02-04 Daghash K. Alqahtani , Maria A. Rodriguez , Muhammad Aamir Cheema , Hamid Rezatofighi , Adel N. Toosi

Reconfigurable Intelligent Surfaces (RISs) have gained immense popularity in recent years because of their ability to improve wireless coverage and their flexibility to adapt to the changes in a wireless environment. These advantages are…

Signal Processing · Electrical Eng. & Systems 2023-07-24 Morteza Tavana , Meysam Masoudi , Emil Björnson

Bistatic Integrated Sensing and Communication (ISAC) is poised to become a cornerstone technology in next-generation communication networks, such as Beyond 5G (B5G) and 6G, by enabling the concurrent execution of sensing and communication…

Signal Processing · Electrical Eng. & Systems 2025-07-15 Yi Wang , Keke Zu , Luping Xiang , Martin Haardt , Chaochao Wang , Xianchao Zhang , Kun Yang

RF emissions detection, classification, and spectro-temporal localization are crucial not only for tasks relating to understanding, managing, and protecting the RF spectrum, but also for safety and security applications such as detecting…

Networking and Internet Architecture · Computer Science 2021-07-13 Hai N. Nguyen , Marinos Vomvas , Triet Vo-Huu , Guevara Noubir

Reconfigurable intelligent surface (RIS)-empowered communication is one of the promising physical layer enabling technologies for the sixth generation (6G) wireless networks due to their unprecedented capabilities in shaping the wireless…

Signal Processing · Electrical Eng. & Systems 2025-11-17 Aymen Khaleel , Recep Vural , Mehmet Cagri Ilter , Majid Gerami , Ertugrul Basar

Energy harvesting can enable a reconfigurable intelligent surface (RIS) to self-sustain its operations without relying on external power sources. In this paper, we consider the problem of energy harvesting for RISs in the absence of…

Signal Processing · Electrical Eng. & Systems 2023-11-07 Morteza Tavana , Meysam Masoudi , Emil Björnson

In opportunistic cognitive radio networks, when the primary signal is very weak compared to the background noise, the secondary user requires long sensing time to achieve a reliable spectrum sensing performance, leading to little remaining…

Information Theory · Computer Science 2024-04-29 Jungang Ge , Ying-Chang Liang , Sumei Sun , Yonghong Zeng , Zhidong Bai

Deep neural networks are being used increasingly to automate data analysis and decision making, yet their decision-making process is largely unclear and is difficult to explain to the end users. In this paper, we address the problem of…

Computer Vision and Pattern Recognition · Computer Science 2018-09-27 Vitali Petsiuk , Abir Das , Kate Saenko

This paper investigates the capabilities and effectiveness of backward localization centered on reconfigurable intelligent surfaces (RISs). In the backward sensing paradigm, the region of interest (RoI) is illuminated using a set of diverse…

Signal Processing · Electrical Eng. & Systems 2025-12-15 Fuhai Wang , Tiebin Mi , Chun Wang , Rujing Xiong , Zhengyu Wang , Robert Caiming Qiu

Modern edge devices, such as cameras, drones, and Internet-of-Things nodes, rely on deep learning to enable a wide range of intelligent applications, including object recognition, environment perception, and autonomous navigation. However,…

Emerging Technologies · Computer Science 2025-05-16 Zhihui Gao , Sri Krishna Vadlamani , Kfir Sulimany , Dirk Englund , Tingjun Chen

Spectrum sensing is a key enabling technique for cognitive radio (CR), which provides essential information on the spectrum availability. However, due to severe wireless channel fading and path loss, the primary user (PU) signals received…

Information Theory · Computer Science 2022-02-08 Shaoe Lin , Beixiong Zheng , Fangjiong Chen , Rui Zhang

In this paper, we propose an reconfigurable intelligent surface (RIS) enhanced spectrum sensing system, in which the primary transmitter is equipped with single antenna, the secondary transmitter is equipped with multiple antennas, and the…

Information Theory · Computer Science 2021-07-15 Jungang Ge , Ying-Chang Liang
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