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Frequency-domain analysis has emerged as a powerful paradigm for time series analysis, offering unique advantages over traditional time-domain approaches while introducing new theoretical and practical challenges. This survey provides a…

Computational Engineering, Finance, and Science · Computer Science 2025-10-21 Qianru Zhang , Yuting Sun , Honggang Wen , Peng Yang , Xinzhu Li , Ming Li , Kwok-Yan Lam , Siu-Ming Yiu , Hongzhi Yin

Time-harmonic far-field source array imaging in a two-dimensional waveguide is analyzed. A low-frequency situation is considered in which the diameter of the waveguide is slightly larger than the wavelength, so that the waveguide supports a…

Analysis of PDEs · Mathematics 2020-12-02 Josselin Garnier

Physical layer security has recently been regarded as an emerging technique to complement and improve the communication security in future wireless networks. The current research and development in physical layer security is often based on…

Information Theory · Computer Science 2013-10-02 Biao He , Xiangyun Zhou

Background/Introduction: Integrating cognitive radio (CR) with traditional wireless networks is helping solve the problem of spectrum scarcity in an efficient manner. The opportunistic and dynamic spectrum access features of CR provide the…

Cryptography and Security · Computer Science 2021-12-14 Muneeb Ul Hassan , Mubashir Husain Rehmani , Maaz Rehan , Jinjun Chen

The need for more transparent face recognition (FR), along with other visual-based decision-making systems has recently attracted more attention in research, society, and industry. The reasons why two face images are matched or not matched…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Marco Huber , Naser Damer

Radiofrequency fields are usually measured in order to be compared with electromagnetic exposure limits defined by international standardization organizations with the aim of preserving the human health. However, in the case of WiFi…

Signal Processing · Electrical Eng. & Systems 2024-02-09 M. Fernandez , D. Guerra , Unai Gil , I. Pena , A. Arrinda

Extremely large-scale arrays (XL-arrays) have emerged as a promising technology to improve the spectrum efficiency and spatial resolution of future wireless systems. Different from existing works that mostly considered physical layer…

Signal Processing · Electrical Eng. & Systems 2025-05-06 Tianyu Liu , Changsheng You , Cong Zhou , Yunpu Zhang , Shiqi Gong , Heng Liu , Guangchi Zhang

For black-box attacks, the gap between the substitute model and the victim model is usually large, which manifests as a weak attack performance. Motivated by the observation that the transferability of adversarial examples can be improved…

Computer Vision and Pattern Recognition · Computer Science 2022-07-13 Yuyang Long , Qilong Zhang , Boheng Zeng , Lianli Gao , Xianglong Liu , Jian Zhang , Jingkuan Song

Drone susceptibility to jamming or spoofing attacks of GPS, RF, Wi-Fi, and operator signals presents a danger to future medical delivery systems. A detection framework capable of sensing attacks on drones could provide the capability for…

Computers and Society · Computer Science 2020-12-17 Philip H. Kulp , Nagi Mei

Extremely large-scale array (XL-array) is envisioned to achieve super-high spectral efficiency in future wireless networks. Different from the existing works that mostly focus on the near-field communications, we consider in this paper a…

Signal Processing · Electrical Eng. & Systems 2023-01-31 Yunpu Zhang , Changsheng You , Li Chen , Beixiong Zheng

This paper presents a method to seamlessly extend the coverage of energy supply field for wireless sensor networks in order to free sensors from wires and batteries, where the multi-point scheme is employed to overcome path-loss…

Networking and Internet Architecture · Computer Science 2014-08-21 Daiki Maehara , Gia Khanh Tran , Kei Sakaguchi , Kiyomichi Araki , Minoru Furukawa

Wireless networks with directional antennas, like millimeter wave (mmWave) networks, have enhanced security. For a large-scale mmWave ad hoc network in which eavesdroppers are randomly located, however, eavesdroppers can still intercept the…

Information Theory · Computer Science 2017-02-16 Yongxu Zhu , Lifeng Wang , Kai-Kit Wong , Robert W. Heath

Small-size acoustic arrays exploit spatial diversity to achieve capabilities beyond those of single-element devices, with applications ranging from teleconferencing to immersive multimedia. A key requirement for broadband array processing…

Signal Processing · Electrical Eng. & Systems 2025-08-19 Federico Miotello , Davide Albertini , Alberto Bernardini

Physical layer security has been recently recognized as a promising new design paradigm to provide security in wireless networks. In addition to the existing conventional cryptographic methods, physical layer security exploits the dynamics…

Millimeter-wave wireless networks offer high throughput and can (ideally) prevent eavesdropping attacks using narrow, directional beams. Unfortunately, imperfections in physical hardware mean today's antenna arrays all exhibit side lobes,…

Cryptography and Security · Computer Science 2018-10-25 Yanzi Zhu , Ying Ju , Bolun Wang , Jenna Cryan , Ben Y. Zhao , Haitao Zheng

Instead of against eavesdropping, this letter proposes a new paradigm in wireless security by studying how a legitimate monitor (e.g., government agencies) efficiently eavesdrops a suspicious wireless communication link. The suspicious…

Information Theory · Computer Science 2015-11-05 Jie Xu , Lingjie Duan , Rui Zhang

Wireless information surveillance, by which suspicious wireless communications are closely monitored by legitimate agencies, is an integral part of national security. To enhance the information surveillance capability, we propose in this…

Information Theory · Computer Science 2016-12-21 Yong Zeng , Rui Zhang

As wireless systems grow rapidly worldwide, one of the most important things, wireless systems designers and service providers faces is interference. Interference decreases coverage, capacity [1], and limits the effectiveness of both new…

Networking and Internet Architecture · Computer Science 2018-11-01 Zeeshan Haider , Muhammad Saleem , T. Jamal

Disclosure avoidance (DA) systems are used to safeguard the confidentiality of data while allowing it to be analyzed and disseminated for analytic purposes. These methods, e.g., cell suppression, swapping, and k-anonymity, are commonly…

Cryptography and Security · Computer Science 2023-01-31 Keyu Zhu , Ferdinando Fioretto , Pascal Van Hentenryck , Saswat Das , Christine Task

The increase in antenna apertures and transmission frequencies in next-generation wireless networks is catalyzing advancements in near-field communications (NFC). In this paper, we investigate secure transmission in near-field multi-user…

Information Theory · Computer Science 2025-05-09 Zihao Teng , Jiancheng An , Christos Masouros , Hongbin Li , Lu Gan , Derrick Wing Kwan Ng
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