Results 21 to 30 of about 12,995 (200)

EToA: New 2D geolocation-based handover decision technique

ICT Express, 2016
Position estimation using Time of Arrival (ToA), Time Difference of Arrival (TDoA), and Angle of Arrival (AoA) measurements are the commonly used location techniques.
Ridha Ouni, Monji Zaidi
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, Hyunsu Hwang, Dongsun Kim, Yunho Jung   +3 more
doaj   +1 more source

Accuracy of Perceived Estimated Travel Time by EMS to a Trauma Center in San Bernardino County, California

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, Colin MacNeil, Jake Toy, Fanglong Dong, Richard Vara, Joe Powell, Troy Pennington, Eugene Kwong   +7 more
doaj   +1 more source

Location Algorithms and Errors in Time-of-Arrival Systems [PDF]

, 2001
This report describes least squares solution methods and linearized estimates of solution errors caused by data errors. These methods are applied to event locating systems which use time-of-arrival (TOA) data.
Aaronson, Eugene A.
core   +1 more source

Time of arrival estimation in pulsar-based navigation systems [PDF]

, 2015
This paper focuses on the Time of Arrival (TOA) estimation problem related to new application of pulsar signals for airplane-based navigation. The aim of the paper is to propose and evaluate a possible algorithm for TOA estimation that consists of epoch ...
I. Garvanov, Garvanov, I., Chr. Kabakchiev, P. Buist, M. Bentum, Kabakchiev, Chr., Behar, V., Buist, P., D. Kabakchieva, Kabakchieva, D., V. Behar, Bentum, Marinus Jan   +11 more
core   +1 more source

Accurate angle-of-arrival measurement using particle swarm optimization

, 2010
As one of the major methods for location positioning, angle-of-arrival (AOA) estimation is a significant technology in radar, sonar, radio astronomy, and mobile communications.
Ho, Kwok Shun, Hayward, G., Minghui Li, Kwok Shun Ho, Gordon Hayward, Li, M.   +5 more
core   +1 more source

Constrained Weighted Least-Squares Algorithms for 3-D AOA-Based Hybrid Localization

IEEE Open Journal of Signal Processing
Source localization with time-of-arrival (TOA), time-difference-of-arrival (TDOA), time-delay (TD), received-signal-strength (RSS), or angle-of-arrival (AOA) measurements from several spatially distributed sensors is commonly used in practice.
Yanbin Zou, Wenbo Wu, Jingna Fan, Huaping Liu   +3 more
doaj   +1 more source

Narrowband Interference Mitigation in UWB Systems Utilizing Frequency Dependence of Null Formation in Array Antennas

IEEE Access, 2016
The high precision ranging using ultra wideband (UWB) signals is expected for various applications. However, UWB requires mitigation of narrowband interference (NBI) from other wireless systems.
Kazutaka Kikuta, Akira Hirose
doaj   +1 more source

Extra Climate Benefits From Afforestation Due to Reduced Forest Fragmentation in China

Advanced Science, EarlyView.
Afforestation in China reduced forest fragmentation in 2015, transforming 51.8 M ha of edge forests into interior forests. This enhanced carbon sequestration (1.4±0.2 Pg CO2e, a cooling biogeochemical effect), while reduced albedo (−0.9 Pg CO2e, a warming biophysical effect) partially offset the gain, yielding a net extra climate benefit of ...
Nan Meng, Wei Li, Philippe Ciais, Martin Brandt, Xiaowei Tong, Yanzheng Yang, Guofeng Shen, Wei Du, Lei Zhu, Yi Leng, Minxuan Sun, Mengjie Han, Xuemei Zhang, Jie Zhang, Nan Wang, Dan Tong, Chao Wu, Wenhao Dong, Shu Tao, Bo Pan   +19 more
wiley   +1 more source