Results 21 to 30 of about 47,507 (304)

Two Rapid Power Iterative DOA Estimators for UAV Emitter Using Massive/Ultra-Massive Receive Array

Drones, 2023
To provide rapid direction finding (DF) for unmanned aerial vehicle (UAV) emitters in future wireless networks, a low-complexity direction of arrival (DOA) estimation architecture for massive multiple-input multiple-output (MIMO) receiver arrays is ...
Yiwen Chen, Qijuan Jie, Yiqiao Zhang, Feng Shu, Xichao Zhan, Shihao Yan, Wenlong Cai, Xuehui Wang, Zhongwen Sun, Peng Zhang, Peng Chen   +10 more
doaj   +1 more source

An Ultra-Wide Band Antenna System for Pulsed Sources Direction Finding

Sensors, 2020
Electric discharges in high-voltage power distribution systems can be localized through their electromagnetic signature in the radio-frequency range.
Razvan D. Tamas, Stefania Bucuci
doaj   +1 more source

Design of a Broadband Coupled-Fed Printed Dipole Antenna as an Array Element for Direction Finding Systems [PDF]

Journal of Electromagnetic Engineering and Science, 2019
This article proposes the design of a coupled-fed printed dipole antenna for direction finding (DF) systems. The antenna consists of a radiating 50° angled expanded-arm printed dipole as well as a fan-shaped feeder that is located on the opposite side of
Sungsik Wang, Sungjun Yoo, Junsik Park, Hongsuk Shim, Hosung Choo   +4 more
doaj   +1 more source

Real Time Passive Direction Finding In FPGA Environment

, 2017
In this paper, FGPA implementations of amplitude and phase comparison direction finding methods are presented. In amplitude comparison direction finding (AC-DF), the power ratio between the receiver channels is compared with the values in the look-up ...
Ortatath, Ismail Emre, Yildirim, Seckin Anil, Serin, Mahmut, Orduyilmaz, Adnan, Yildirim, Alper, Kara, Gokhan, Gurel, Abdullah Emin   +6 more
core   +1 more source

Performance analysis of rank reduction estimator in the presence of unexpected modeling errors

Tongxin xuebao, 2011
A performance analysis of the RARE was presented in presence of unexpected modeling errors.First,the closed-form expression of direction-finding（DF） error was given through the first-order Taylor series expansion of the spatial spectrum function,and then
WANG Ding, WU Ying
doaj   +2 more sources

The Influence Of Propagation Environment On The Accuracy Of Emission Source Bearing

Metrology and Measurement Systems, 2015
This paper focuses on the radio direction finding (DF) in multipath environments. Based on the measurement results presented in the open literature, the authors analyse the influence of environment transmission properties on the spread of the signal ...
Ziółkowski Cezary, Kelner Jan Marcin
doaj   +1 more source

IOAM: A Novel Sensor Fusion-Based Wearable for Localization and Mapping

Remote Sensing, 2022
With the development of indoor location-based services (ILBS), the dual foot-mounted inertial navigation system (DF-INS) has been extensively used in many fields involving monitoring and direction-finding.
Renjie Wu, Boon Giin Lee, Matthew Pike, Linzhen Zhu, Xiaoqing Chai, Liang Huang, Xian Wu   +6 more
doaj   +1 more source

CRB-based comparative study of array signal processing direction finding methods supported with SDR platform implementation

Journal of Physics: Conference Series, 2023
Radio Direction-Finding (DF) is an extremely important process in numerous commercial and military applications. Array signal processing-based DF methods have been developed to improve estimation performance in recent applications that require higher ...
O. Elkasrawi, A. Abdelaziz, H. Abou-Bakr, M. Aboelazm   +3 more
semanticscholar   +1 more source

First-Order Peaks Determination for Direction-Finding High-Frequency Radar

Journal of Marine Science and Engineering, 2020
Direction-finding (DF) high-frequency radar (HFR) is preferred among the HFR family and is widely used around the world due to its compact structure.
Yeping Lai, Yuhao Wang, Hao Zhou
doaj   +1 more source

Reperfusion‐Dependent Outcomes After Endovascular Thrombectomy Stratified by NIHSS‐ASPECTS Clinical‐Core Mismatch

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective This analysis evaluates the effect of successful reperfusion on functional outcomes after MT, stratified by admission National Institutes of Health Stroke Scale (NIHSS) and Alberta Stroke Program Early CT Score (ASPECTS) as surrogates for clinical‐core mismatch, using multicenter registry data.
Felix Schlicht, Lukas Meyer, Gabriel Broocks, Matthias Bechstein, Christian Thaler, Christian Heitkamp, Laurens Winkelmeier, Vincent Geest, Alexander Heitkamp, Maximilian Jungnitz, Gregor Peter, Luca Meucci, Tobias Faizy, Jawed Nawabi, Caspar Brekenfeld, Fabian Flottmann, Maximilian Schell, Alexandros Hadjilaou, Uta Hanning, Götz Thomalla, Jens Fiehler, Susanne Gellißen, Helge C. Kniep, for the German Stroke Registry Endovascular Treatment, (GSR‐ET) Alexander Nave, Anna Alegiani, Annerose Mengel, Arno Reich, Bernd Eckert, Charlotte Pietrock, Christian Nolte, Eberhard Siebert, Fabian Flottmann, Fee Keil, Franziska Dorn, Gabor Petzold, Götz Thomalla, Hanna Zimmermann, Jan Borggrefe, Jan Hendrik Schäfer, Jens Fiehler, Joachim Röther, Klaus Gröschel, Lars Kellert, Mario Abruscato, Maximilian Schell, Omid Nikoubashman, Peter Schellinger, Silke Wunderlich, Steffen Tiedt, Sven Thonke, Timo Uphaus, Tobias Boeckh‐Behrens, Ulrike Ernemann   +53 more
wiley   +1 more source