Results 51 to 60 of about 166,388,471 (186)

Near‐Field Acoustic Imaging Using Fiber‐Optic Distributed Acoustic Sensing and Beamforming Techniques

Advanced Science, Volume 13, Issue 6, 30 January 2026.
This work introduces a beamforming‐based method to generate acoustic images from fiber‐optic distributed acoustic sensing (DAS) data. By performing 2D scanning around the sensing fiber, the approach enables near‐field imaging and localization of acoustic sources, even in regions distant from the fiber. A data‐driven DAS channel selection improves image
Marcelo A. Soto, Diego Badillo‐San‐Juan   +1 more
wiley   +1 more source

Synchronization-Free Underwater Acoustic Localization for Autonomous Platforms: A Neural Network TDOA Approach and the Role of Receiver Geometry

Drones
Accurate underwater acoustic localization is a key enabling capability for autonomous underwater vehicles and underwater drones, which cannot rely on satellite positioning while submerged and therefore depend on acoustic methods to determine their ...
Yigit Mahmutoglu
doaj   +1 more source

TranQuiL: Long Range Detection and Localization of Interference in Radio Quiet Zones

Radio Science, Volume 61, Issue 1, January 2026.
Abstract Radio Quiet Zones (RQZs) have been established to prevent radio sources from causing harmful interference to sensitive radio telescopes, which study extremely faint cosmic radio waves. Even with strict regulations, such interference is growing due to the widespread use of consumer electronics, emitting in many different frequency bands ...
Atul Bansal, Mohamed Ibrahim, Kuang Yuan, Yiwen Song, Bob Iannucci, Swarun Kumar   +5 more
wiley   +1 more source

A Lightweight, Secure and Reliable Geographic Routing Protocol for Urban VANETs

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper proposes a Lightweight Secure and Reliable Geographic Routing (LSRGR) protocol. The protocol operates in two phases: (i) a greedy forwarding strategy with location verification, which leverages key urban routing parameters to select the most reliable forwarder and employs a recovery mechanism against routing failures, and (ii) reliable route
Ahmed N. Hassan, Mohammad Aljaidi, Yue Cao, Omprakash Kaiwartya   +3 more
wiley   +1 more source

Efficient Joint IRS and Base Station–Based Cooperative UAV Localisation in GPS‐Denied Environments

IET Communications, Volume 20, Issue 1, January/December 2026.
It proposes an efficient localisation method for unmanned aerial vehicle (UAV) localisation using multiple existing integrated reflecting surfaces (IRSs), and multiple existing base transceiver stations (BTSs) in a time multiplex joint communication and localisation scenario. Also, the Cramer–Rao bound of the problem is calculated.
Hadi Zayyani, Mohammad Salman, Fernando D. A. Garcia, Felipe Augusto Pereira de Figueiredo, Rausley de Souza   +4 more
wiley   +1 more source

From Detection to Countermeasure: A Review of Key Technologies in Counter‐Unmanned Aerial Vehicle Systems

IET Cyber-Systems and Robotics, Volume 8, Issue 1, January/December 2026.
ABSTRACT With the rapid proliferation of unmanned aerial vehicles (UAVs) in the military, logistics and public safety sectors, the threat of illegal intrusion, information theft, and security breaches has increased. This paper provides a comprehensive review of recent developments in counter‐unmanned aerial vehicle (counter‐UAV) systems, focussing on ...
Lei Xing, Can Cui, Miao Wang, Chao Xu
wiley   +1 more source

A Review of Linear Multilateration Techniques and Applications

IEEE Access
In multilateration, distances between an unknown location and several known points are used to determine the location of the unknown point. Papers on algorithms for multilateration, such as time of arrival (TOA), time difference of arrival (TDOA), and ...
Eric Widdison, David G. Long
doaj   +1 more source

Analysis of Long Wave Polarisation Direction Finding Based on Three‐Axis Magnetic Antenna Array

Electronics Letters, Volume 62, Issue 1, January/December 2026.
This paper addresses the joint estimation of multiple parameters for long‐wave and VLF signals by proposing a robust closed‑form direction‑finding algorithm. ABSTRACT To overcome the degradation of conventional direction‐finding accuracy for VLF and LW signals caused by sky‑wave‑induced polarisation deflection, this paper employs a tri‑axial magnetic ...
Weihua Xiang, Rong Wang, Shimin Feng, Tianhui Fu   +3 more
wiley   +1 more source

Joint Time Synchronisation and Localisation Method by TDOA Observation in 5G Networks

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This work proposes a method for joint time synchronisation and localisation problems and proposes to obtain the initial values of the alternating iteration algorithm through solving the MVIE problem. The simulations showcase the satisfying positioning accuracy and clock synchronisation accuracy of the proposed method.
Qiao Liu, Yutong Tian, Zhihang Qu, Yong Li   +3 more
wiley   +1 more source

Loop Matching Pursuit Multistation TDOA Estimation Method Based on Noncircular Signal

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
The existing TDOA estimation methods based on orthogonal matching pursuit only consider the scenario of circular signal and are prone to the degradation of estimation performance due to atom misselection under small samples and low signal‐to‐noise ratio.
Zeyu Wang, Ding Wang, Jiexin Yin, Nae Zheng   +3 more
wiley   +1 more source