http://en.elmag.org/ 2012-02-05T01:21:35+01:00 http://en.elmag.org/ http://en.elmag.org/lib/tpl/monobook/images/favicon.ico text/html 2012-01-21T11:09:03+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:indoor?rev=1327140543 Indoor Propagation Modeling Supported by * Intelligent Infrastructures for Cognitive Networks, Czech Ministry of Education, Youth and Sports, grant no. OC10005, 2010-2012 * COST Action IC0902, Cognitive Radio and Networking for Cooperative Coexistence of Heterogeneous Wireless Networks, 2009-2013 * COST Action IC0803, RF/Microwave Communication Subsystems for Emerging Wireless Technologies (RFCSET), 2008-2012 * Wide-Band parameters Prediction of Mobile Systems Channel, CTU Prague, CTU0… text/html 2012-01-21T10:58:12+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:cogcom?rev=1327139892 Intelligent Infrastructures for Cognitive Networks The research is focused on a new approach to the control of the propagation environment in indoor scenarios using intelligent walls. The intelligent wall is a conventional wall situated inside a building, but equipped with an active frequency selective surface and sensors. The intelligent wall can be designed as a self-configuring and self-optimizing autonomous part of a collaborative infrastructure working within a high-capacity mobile radio s… text/html 2012-01-21T10:44:16+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation?rev=1327139056 Team * Pavel Pechac * Stanislav Zvanovec * Robert Urban * Martin Mudroch * Ludek Subrt * Petr Horak * Milan Kvicera * Michal Simunek * Otakar Jicha Past Members: Martin Klepal, Petr Ledl, Filip Mikas, Pavel Valtr, Jaroslav Holis, text/html 2012-01-21T10:36:42+01:00 Pavel Pechač http://en.elmag.org/doku.php/wiki:user:pechac?rev=1327138602 Contact Dept. of Electromagnetic Field, Faculty of Electrical Engineering, Czech Technical University in Prague Address: Technicka 2, 166 27 Praha 6, Room No.: 824/A Phone: +420 224 352 252, fax: +420 233 339 958, email: pechac AT fel.cvut.cz text/html 2012-01-21T10:35:01+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:confpapers?rev=1327138501 Selected Conference Papers * Grábner, M. - Kvičera, V. - Pechač, P. - Jícha, O.: Measured and Simulated Fluctuations of Received Power on 11 GHz Terrestrial Path Using Vertical Profiles of Atmospheric Refractivity. In Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP). Piscataway: IEEE, 2011, p. 190-193. ISBN 978-88-8202-074-3. * Horák, P. - Pechač, P.: Attenuation Due to Vegetation for Satellite Services: Winter Season Measurement. In Proceedings of the 5th Euro… text/html 2012-01-14T11:14:21+01:00 Lukáš Jelínek http://en.elmag.org/doku.php/wiki:user:jelinek?rev=1326536061 Departament of Electromagnetic Field Technická 2, 166 27 Praha 6 Czech Republic E-mail: <l_jelinek@us.es>, <jelinel1@fel.cvut.cz> I was born in Kladno, medium size town in the vicinity of Prague in Czech Republic. I have started my undergraduate studies at Czech Technical University in Prague in 1998. In 2004 I have obtained Engineer degree at the department of electromagnetic field. In the same year I have started my doctoral studies at the same university and department. The topic of my do… text/html 2012-01-12T13:39:25+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:refraction?rev=1326371965 Refractivity Profile Estimation As the atmospheric conditions, expressed in terms of radio refractivity, can considerably influence the performance of radio communication links and radar systems, there is a need for reliable prediction of refractivity structure in the lower atmosphere. The usual methods of direct refractive index measurement by means of radiosounding and refractometers can usually only give a rough idea of the refractivity distribution. The basic disadvantage of the radiosonde,… text/html 2012-01-12T13:37:38+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:vegetation2?rev=1326371858 Propagation Modeling of Shadowing by Vegetation for Mobile Satcom & Satnav Systems Measurement of the shadowing by vegetation in urban areas using a 9m long remote controlled airship.. The proposed work is based on previous trials with a remote control airship conducted by the research team within the COST 297 project. It was proven that the remote control airship is very suitable for experimental propagation studies for HAPs/satellite communications in the L and S bands. New narrowband genera… text/html 2012-01-12T13:36:38+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:penetration?rev=1326371798 Outdoor-to-Indoor Propagation Modeling and Measurement for High Elevation Angle Links The building penetration loss is one of the key factors in planning future satellite-to-indoor/HAP-to-indoor communication links. An extensive measurement campaign, covering a representative set of typical buildings in an urban area and aimed at building penetration loss for high elevation angles at L-, S- and C-band, was performed in Prague in 2009. Throughout the measurements, a remote-controlled airship w… text/html 2012-01-12T13:34:11+01:00 Pavel Pechač http://en.elmag.org/doku.php/k317:nabidka_pracoviste:rfpropagation:uav?rev=1326371651 Radio Propagation and Channel Modeling for UAV Applications in Urban Areas Nowadays, civilian applications including air surveillance, remote sensing, law enforcement, etc. can be implemented by means of remotely controlled, unmanned aerial vehicles. These aircraft are commonly called UAVs. They are usually controlled and operated from distant locations using low frequencies (VHF, UHF) guarantying a sufficient maximal range and supporting low data rates for telecontrol and telemetry. However, f… text/html 2011-11-04T16:30:05+01:00 Jan Macháč http://en.elmag.org/doku.php/?image=wiki%3Auser%3Amachac%3Atexty%3Aeumc_2011.pdf&ns=wiki%3Auser%3Amachac%3Atexty&rev=1320420605&do=media text/html 2011-11-04T16:29:56+01:00 Jan Macháč http://en.elmag.org/doku.php/?image=wiki%3Auser%3Amachac%3Atexty%3Aawpl_2011.pdf&ns=wiki%3Auser%3Amachac%3Atexty&rev=1320420596&do=media text/html 2011-11-04T16:29:47+01:00 Jan Macháč http://en.elmag.org/doku.php/?image=wiki%3Auser%3Amachac%3Atexty%3Aap_2011.pdf&ns=wiki%3Auser%3Amachac%3Atexty&rev=1320420587&do=media text/html 2011-08-26T13:30:47+01:00 Jan Macháč http://en.elmag.org/doku.php/?image=wiki%3Auser%3Amachac%3Atexty%3Atime_delay_estim.pdf&ns=wiki%3Auser%3Amachac%3Atexty&rev=1314358247&do=media text/html 2011-08-26T12:50:30+01:00 Jan Macháč http://en.elmag.org/doku.php/?image=wiki%3Auser%3Amachac%3Atexty%3Aims_2011_final.pdf&ns=wiki%3Auser%3Amachac%3Atexty&rev=1314355830&do=media text/html 2011-07-18T14:52:59+01:00 Pavel Pechač http://en.elmag.org/doku.php/?image=k317%3Anabidka_pracoviste%3Arfpropagation%3Auav1.png&ns=k317%3Anabidka_pracoviste%3Arfpropagation&rev=1310993579&do=media <img src="/lib/exe/fetch.php/k317:nabidka_pracoviste:rfpropagation:uav1.png?w=499&h=285t=1310993579" alt="k317:nabidka_pracoviste:rfpropagation:uav1.png" /> text/html 2011-07-18T14:43:00+01:00 Pavel Pechač http://en.elmag.org/doku.php/?image=k317%3Anabidka_pracoviste%3Arfpropagation%3Aveget2.png&ns=k317%3Anabidka_pracoviste%3Arfpropagation&rev=1310992980&do=media <img src="/lib/exe/fetch.php/k317:nabidka_pracoviste:rfpropagation:veget2.png?w=393&h=277t=1310992980" alt="k317:nabidka_pracoviste:rfpropagation:veget2.png" /> text/html 2011-07-18T14:42:06+01:00 Pavel Pechač http://en.elmag.org/doku.php/?image=k317%3Anabidka_pracoviste%3Arfpropagation%3Aveget1.png&ns=k317%3Anabidka_pracoviste%3Arfpropagation&rev=1310992926&do=media <img src="/lib/exe/fetch.php/k317:nabidka_pracoviste:rfpropagation:veget1.png?w=500&h=120t=1310992926" alt="k317:nabidka_pracoviste:rfpropagation:veget1.png" /> text/html 2011-07-18T14:32:43+01:00 Pavel Pechač http://en.elmag.org/doku.php/?image=k317%3Anabidka_pracoviste%3Arfpropagation%3Abpl-illustration.png&ns=k317%3Anabidka_pracoviste%3Arfpropagation&rev=1310992363&do=media <img src="/lib/exe/fetch.php/k317:nabidka_pracoviste:rfpropagation:bpl-illustration.png?w=500&h=214t=1310992363" alt="k317:nabidka_pracoviste:rfpropagation:bpl-illustration.png" /> text/html 2011-07-18T14:27:12+01:00 Pavel Pechač http://en.elmag.org/doku.php/?image=k317%3Anabidka_pracoviste%3Arfpropagation%3Aairship.png&ns=k317%3Anabidka_pracoviste%3Arfpropagation&rev=1310992032&do=media <img src="/lib/exe/fetch.php/k317:nabidka_pracoviste:rfpropagation:airship.png?w=278&h=209t=1310992032" alt="k317:nabidka_pracoviste:rfpropagation:airship.png" />