Results 11 to 20 of about 250,256 (245)

The improvement of fiber-detection method to enhance the output of amplify-received relaying on FSO communications [PDF]

International Journal of Electronics and Telecommunications, 2023
The performance of free-space optical (FSO) communications that using an optical amplifier (OA) in the scheme of an amplify-received (AR)-relaying has a major drawback in the detection of input signal quality under the effects of turbulence.
Ucuk Darusalam, Purnomo Sidi Priambodo, Fitri Yuli Zulkifli, Eko Tjipto Rahardjo   +3 more
doaj   +1 more source

Signals Of Opportunity In Mobile Radio Positioning

, 2012
Publication in the conference proceedings of EUSIPCO, Bucharest, Romania ...
Dammann, Armin, Sand, Stephan, Raulefs, Ronald   +2 more
openaire   +2 more sources

Performance considerations for positioning with signals of opportunity

2016 International Conference on Localization and GNSS (ICL-GNSS), 2016
This paper presents a study on the benefit of observing several signals of opportunity for positioning purposes. Several static emitters are placed over a defined area where an user is moving and acquiring measurements to each of these emitters. The simulation considers that the user is capable of acquiring time of arrival measurements from several ...
Lohan Elena-Simona, Figueiredo e Silva Pedro   +1 more
openaire   +2 more sources

Weak signal detection: A discrete window of opportunity for achieving ‘Vision 90:90:90’?

SAHARA-J, 2016
Introduction: UNAIDS’ Vision 90:90:90 is a call to ‘end AIDS’. Developing predictive foresight of the unpredictable changes that this journey will entail could contribute to the ambition of ‘ending AIDS’.
Christopher J. Burman, Marota Aphane, Peter Delobelle   +2 more
doaj   +1 more source

A Study on an Anti-Multiple Periodic Frequency Modulation (PFM) Interference Algorithm in Single-Antenna Low-Earth-Orbit Signal-of-Opportunity Positioning Systems

Remote Sensing
Signal-of-Opportunity (SOP) positioning based on Low-Earth-Orbit (LEO) constellations has gradually become a research hotspot. Due to their large quantity, wide spectral coverage, and strong signal power, LEO satellite SOP positioning exhibits robust ...
Lihao Yao, Honglei Qin, Hao Xu, Deyong Xian, Donghan He, Boyun Gu, Hai Sha, Yunchao Zou, Huichao Zhou, Nan Xu, Jiemin Shen, Zhijun Liu, Feiqiang Chen, Chunjiang Ma, Xiaoli Fang   +14 more
doaj   +1 more source

Survey on positioning technology based on signal of opportunity from low earth orbit

Frontiers in Physics
Positioning, Navigation, and Timing (PNT) services are essential for supporting various aspects of modern society. Fields such as communications, transportation, and military operations heavily rely on accurate and reliable PNT services, with this ...
Jiawei He, Jiawei He, Shaojie Ni, Shaojie Ni, Honglei Lin, Honglei Lin, Zhe Liu, Zhe Liu, Zhibin Xiao, Zhibin Xiao   +9 more
doaj   +1 more source

A signals of opportunity based cooperative navigation network [PDF]

Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON), 2009
With the advent of advanced wireless standards has come the ability to address more sophisticated problems. One such issue is to provide robust navigation in challenging environments. Our approach to develop a signals of opportunity (SoOP) based cooperative navigation network that has the potential to provide improved performance and extend coverage ...
Michael A. Enright, Christopher N. Kurby
openaire   +1 more source

Electromagnetic modeling of scattered signals of opportunity: Challenges and approaches [PDF]

URSI Radio Science Bulletin, 2020
he possibility of exploiting signals of opportunity such as navigation signals for remote-sensing applications has been the object of extensive scientific research. Over the years, the potential of this technique has been mainly investigated for wind scatterometry and sea-surface altimetry, resulting in mission concepts and prototypes currently in ...
Comite, Davide, Dente, Laura, Guerriero, Leila, Pierdicca, Nazzareno   +3 more
openaire   +2 more sources

A Study on Anti-Jamming Algorithms in Low-Earth-Orbit Satellite Signal-of-Opportunity Positioning Systems for Unmanned Aerial Vehicles

Drones
Low-Earth-Orbit (LEO) satellite Signal-of-Opportunity (SOP) positioning technology has gradually matured to meet the accuracy requirements for unmanned aerial vehicle (UAV) positioning in daily scenarios.
Lihao Yao, Honglei Qin, Boyun Gu, Guangting Shi, Hai Sha, Mengli Wang, Deyong Xian, Feiqiang Chen, Zukun Lu   +8 more
doaj   +1 more source

The HIT Network for Children and Adolescents With CNS Tumors Facilitates Improvements of Diagnostic Assessments, Multimodal Treatments, Individual Counseling, and Research in Germany, Austria, and Switzerland

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The HIT network was established in 2000 to create a population‐based structure aiming to improve survival rates and reduce late effects for children with central nervous system (CNS) tumors by conducting comprehensive clinical trials.
Stefan Rutkowski, Michael C. Frühwald, Gudrun Fleischhack, Stephan Tippelt, Pablo Hernáiz‐Driever, Olaf Witt, Astrid Gnekow, Christof Kramm, Matthias Eyrich, Johannes E. A. Wolf, Hermann Müller, Carsten Friedrich, Uwe R. Kordes, Denise Obrecht‐Sturm, Petra Ketteler, Barbara von Zezschwitz, Pascal Johann, Dominik Sturm, Karoline Nemes, Stefan Schönberger, Till Milde, Brigitte Bison, Monika Warmuth‐Metz, Torsten Pietsch, Ulrich Schüller, Arend Koch, David Capper, Martin Hasselblatt, Christian Thomas, Christian Hagel, Stefan M. Pfister, Felix Sahm, David T. W. Jones, Martin U. Schuhmann, Jürgen Krauss, Pedram Emami, Ahmed El Damaty, Rolf D. Kortmann, Rudolf Schwarz, Jürgen Debus, Mechthild Krause, Fabian Pohl, Holger Ottensmeier, Lisa Bußenius, Katja Baust, Andreas Faldum, Cecile Ronckers, Desiree Grabow, Martin Benesch, Thomas Perwein, Karin Dieckmann, Irene Slavc, Johannes Gojo, Nicolas U. Gerber, André O. von Bueren, Katrin Scheinemann, Gabriele Calaminus, Beate Timmermann, Ulrich‐Wilhelm Thomale, Martin Mynarek   +59 more
wiley   +1 more source