Results 41 to 50 of about 309,361 (185)

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

Super-Resolution Time of Arrival Estimation Using Random Resampling in Compressed Sensing [PDF]

, 2018
There is a strong demand for super-resolution time of arrival (TOA) estimation techniques for radar applications that can that can exceed the theoretical limits on range resolution set by frequency bandwidth.
Fang SHANG, Masanari NOTO, Shouhei KIDERA, Tetsuo KIRIMOTO   +3 more
core   +2 more sources

Multipath-Assisted Ultra-Wideband Vehicle Localization in Underground Parking Environment Using Ray-Tracing

Sensors
In complex underground parking scenarios, non-line-of-sight (NLOS) obstructions significantly impede positioning signals, presenting substantial challenges for accurate vehicle localization.
Shuo Hu, Lixin Guo, Zhongyu Liu, Shuaishuai Gao   +3 more
doaj   +1 more source

Time-of-arrival distributions from position-momentum and energy-time joint measurements [PDF]

, 1999
The position-momentum quasi-distribution obtained from an Arthurs and Kelly joint measurement model is used to obtain indirectly an ``operational'' time-of-arrival (TOA) distribution following a quantization procedure proposed by Kocha\'nski and W ...
A. D. Baute, A.D. Baute, A.J. Bracken, C.R. Leavens, D.M. Appleby, D.M. Appleby, E. Arthurs, E.B. Davies, G.R. Allcock, G.R. Allcock, G.R. Allcock, G.S. Agarwal, H. Martens, I. Egusquiza, I. L. Egusquiza, J. Finkelstein, J. G. Muga, J. Halliwell, J. Kijowski, J. Kijowski, J. Oppenheim, J. von Neumann, J.G. Muga, J.G. Muga, J.G. Muga, J.G. Muga, J.J. Halliwell, K. Wódkiewicz, L. Cohen, L. Cohen, L. Cohen, M. Toller, M.G. Raymer, P. Busch, P. Busch, P. Kochański, P. Kochański, P. Törmä, R. Sala, R. Sala Mayato, R. Werner, R. Werner, R.F. O’Connell, S. Stenholm, S.L. Braunstein, U. Leonhardt, V. Delgado, W.L. Power, Y. Aharonov, Y. Aharonov, Y. Aharonov   +50 more
core   +2 more sources

Cramer-Rao bounds in the estimation of time of arrival in fading channels [PDF]

, 2018
This paper computes the Cramer-Rao bounds for the time of arrival estimation in a multipath Rice and Rayleigh fading scenario, conditioned to the previous estimation of a set of propagation channels, since these channel estimates (correlation between ...
René Jativa, E., Vidal Manzano, José
core   +2 more sources

Research of underground positioning algorithm based on DOA and TDOA

Gong-kuang zidonghua, 2013
In view of problems that current underground positioning system is sensitive to environmental change and has low positioning accuracy, the paper introduced an underground positioning algorithm based on DOA and TDOA. The algorithm takes advantages of high
ZHAI Yan-rong, HUANG Huan, ZHANG Shen, MA Xiu-ping, LIU Wei, YOU Chun-xia   +5 more
doaj   +1 more source

Quantum optical time-of-arrival model in three dimensions

, 2004
We investigate the three-dimensional formulation of a recently proposed operational arrival-time model. It is shown that within typical conditions for optical transitions the results of the simple one-dimensional version are generally valid.
Aharonov Y, Allcock G R, Blanchard P, Carmichael H, Damborenea J A, Damborenea J A, G C Hegerfeldt, Galapon E A, Giannitrapani R, Halliwell J J, Hegerfeldt G C, Hegerfeldt G C, Hegerfeldt G C, Hegerfeldt G C Wilser T S H D Doebner W Scherer F Schroeck, J G Muga, Kijowski J, Kocha?ski P, Leavens C R, León J, Muga J G, Navarro B, Navarro B, Ruschhaupt A, Ruschhaupt A, V Hannstein, Werner R   +25 more
core   +1 more source

Review of Localization and Clustering in USV and AUV for Underwater Wireless Sensor Networks

Telecom, 2023
Oceanographic data collection, disaster prevention, aided navigation, critical observation sub-missions, contaminant screening, and seaward scanning are just a few of the submissions that use underwater sensor hubs.
Kaveripakam Sathish, Ravikumar Chinthaginjala Venkata, Rajesh Anbazhagan, Giovanni Pau   +3 more
doaj   +1 more source

Consistent histories, the quantum Zeno effect, and time of arrival [PDF]

, 2000
We present a decomposition of the general quantum mechanical evolution operator, that corresponds to the path decomposition expansion, and interpret its constituents in terms of the quantum Zeno effect (QZE).
A. Auerbach, A.D. Baute, B. Misra, D. Home, G.R. Allcock, H.A. Fertig, H.A. Fertig, I. L. Egusquiza, I.L. Egusquiza, J. G. Muga, J. Kijowski, J.B. Hartle, J.J. Halliwell, J.J. Halliwell, J.J. Halliwell, M. Gell-Mann, N. Yamada, N. Yamada, R. Omnès, R. Omnès, R.B. Griffiths, R.F. Werner, R.J. Cook, R.Omnès, R.P. Feynman, S. Pascazio, T.E. Clark, W.M. Itano, Y. Aharonov   +28 more
core   +2 more sources

Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012)

Comptes Rendus. Géoscience, 2021
Instrumental catalogues of earthquakes in the subduction zone of the Lesser Antilles are produced by local observatories and the International Seismological Centre.
Massin, Frédérick, Clouard, Valérie, Vorobieva, Inessa, Beauducel, François, Saurel, Jean-Marie, Satriano, Claudio, Bouin, Marie-Paule, Bertil, Didier   +7 more
doaj   +1 more source