Results 31 to 40 of about 95,355 (231)
On the Geolocation Bounds for Round-Trip Time-of-Arrival and All Non-Line-of-Sight Channels
EURASIP Journal on Advances in Signal Processing, 2007 The development of future geolocation systems requires a fundamental understanding of the importance of various system parameters, such as the number of sensors, the SNR, bandwidth, and channel conditions. We consider the bounds on time-based geolocation
Laurence Mailaender
doaj +1 more source
Track mobile devices in a cellular mobile communications system
ACI Avances en Ciencias e Ingenierías, 2009 Este artículo trata sobre el uso de algoritmos estadísticos en la estimación de señales de una red celular y su aplicación al posicionamiento y seguimiento de dispositivos móvil, con la finalidad de conseguir que la red esté en capacidad de proporcionar ...
Santiago Silva, René P. Játiva E.
doaj +1 more source
IEEE 802.15.4 ZigBee-Based Time-of-Arrival Estimation for Wireless Sensor Networks
Sensors, 2016 Precise time-of-arrival (TOA) estimation is one of the most important techniques in RF-based positioning systems that use wireless sensor networks (WSNs).
Jeonghyeon Cheon +3 more
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Ziv-Zakai-Optimal OFDM Resource Allocation for Time-of-Arrival Estimation [PDF]
IEEE Transactions on Wireless CommunicationsThis paper presents methods of optimizing the placement and power allocations of pilots in an orthogonal frequency-division multiplexing (OFDM) signal to minimize time-of-arrival (TOA) estimation errors under power and resource allocation constraints ...
Andrew M. Graff, Todd E. Humphreys
semanticscholar +1 more source
Western Journal of Emergency Medicine, 2016 Introduction: Mobilization of trauma resources has the potential to cause ripple effects throughout hospital operations. One major factor affecting efficient utilization of trauma resources is a discrepancy between the prehospital estimated time of ...
Michael M. Neeki +7 more
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Enhanced hybrid positioning in wireless networks I: AoA-ToA [PDF]
, 2014 Localization in wireless networks presents enormous challenges for scientists and engineers. Some of the most commonly used techniques for localization are based on time of arrival (ToA), received signal strength (RSS) and angle of arrival (AoA) of the ...
Kemp, AH, Khan, MW, Salman, N
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Techniques for RF localization of wireless capsule endoscopy [PDF]
, 2016 © 2016 IEEE. Location estimation of a wireless capsule endoscope at 400 MHz MICS band is implemented here using both RSSI and TOA-based techniques and their performance investigated. To improve the RSSI-based location estimation, a maximum likelihood (ML)
Boddupalli, A +4 more
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Predicting the Time of Arrival of Coronal Mass Ejections at Earth From Heliospheric Imaging Observations [PDF]
Journal of Geophysical Research: Space Physics, 2020 The time of arrival (ToA) of coronal mass ejections (CMEs) at Earth is a key parameter due to the space weather phenomena associated with the CME arrival, such as intense geomagnetic storms.
C. Braga +5 more
semanticscholar +1 more source
Hybrid TOA/AOA Approximate Maximum Likelihood Mobile Localization
Journal of Electrical and Computer Engineering, 2010 This letter deals with a hybrid time-of-arrival/angle-of-arrival (TOA/AOA) approximate maximum likelihood (AML) wireless location algorithm. Thanks to the use of both TOA/AOA measurements, the proposed technique can rely on two base stations (BS) only ...
Mohamed Zhaounia +2 more
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Positioning of High-speed Trains using 5G New Radio Synchronization Signals [PDF]
, 2018 We study positioning of high-speed trains in 5G new radio (NR) networks by utilizing specific NR synchronization signals. The studies are based on simulations with 3GPP-specified radio channel models including path loss, shadowing and fast fading effects.
Koivisto, Mike +5 more
core +2 more sources