Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
A new LMDS Architecture based on TLN
A new LMDS Architecture based on TLN Massimo Celidonio Fondazione Ugo Bordoni Viale Europa 190 00144 Rome, Italy Tel. +39 654802127 Fax +39 6 54804401 email: celi@fub.it Abstract: Two central trends are defining the next major phase of network evolution and market opportunity: broadband networking and wireless access. In line with this evolution, the demand of Local Multipoint Distribution Servic
THE USE OF COFDM FOR MMDS
THE USE OF COFDM FOR MMDS B. Boelike, R. Burow, D. Haenssgen Deutsche Telekom Berkom GmbH, Goslarer Ufer 35, D-I0589 Berlin Germany B.Boelike@Berkom.de, R.Burow@Berkom.de, and D.Haenssgen@Berkom.de ABSTRACT Propagation aspects are inspected for the MMDS range from 2 to 60 GHz. The differences between the free air propagation and the delivering via cable are shown, too. Deutsche Telekom has tested
PRESERVING QUALITY OF SERVICE IN WIRELESS ATM NETWORKS
PRESERVING QUALITY OF SERVICE IN WIRELESS ATM NETWORKS S Sezer, F E Garcia-Palacios, A Marshall, R Woods Department of Electrical & Electronic Engineering, The Queen's University of Belfast Ashby Building, Stammillis Road, BT9 5AH Belfast Northern Ireland, U.K. s.sezer@ee.qub.ac.uk ABSTRACT Providing guaranteed Quality of Service (QoS) in cell and packet based networks places additional deman
ANALYSIS OF M-QAM-OFDM TRANSMISSION SYSTEM PERFORMANCE IN THE PRESENCE OF PHASE NOISE AND NONLINEAR AMPLIFIERS
ANALYSIS OF M-QAM-OFDM TRANSMISSION SYSTEM PERFORMANCE IN THE PRESENCE OF PHASE NOISE AND NONLINEAR AMPLIFIERS Roberto Corvaja, Elena Costa and Silvano Pupolin Universityof Padova Dipartimentodi Elettronica e Informatica,via G. Gradenigo6/A, 35131Padova,Italy corvajaOtiziana.dei.unipd.it ecosta~dei.unipd.it pupolinCdei.unipd.it . ABSTRACT The performance evaluation of M-QAM-OFDM transmission sys
THREE DIFFERENT METHODS FOR DETERMINING THE MICROWAVE NOISE PARAMETERS OF HEMT's AT DECREASING TEMPERATURES
THREE DIFFERENT METHODS FOR DETERMINING THE MICROWAVE NOISE PARAMETERS OF HEMT's AT DECREASING TEMPERATURES A. Caddemi, A. Di Paola and M. Sannino Dipartimento di Ingegneria Elettrica, Laboratono di Elettronica delle Microonde, UniversitAdi Palermo - Viale delle Scienze, 90128 Palermo, Italy sannino@lem.diepa.unipa.it ABSTRACT The noise characteristicsof any transistor are usually represented by
Visualization of Impedance-Mismatching and Electromagnetic-Coupling by Using a Radiowave Holography Method
Visualization of Impedance-Mismatching and Electromagnetic-Coupling by Using a Radiowave Holography Method Hitoshi Kitayoshi Advantest Laboratories Ltd. 48-2 Matsubara, Kamiayashi, Aoba-ku, Sendai 989-3124, JAPAN Telephone: +81-22-392-8731 Fax: +81-22-392-8737 e-mail: ap.emv@atl.advantestco.jp Abstract: A new method for evaluating microwave modules is proposed. The technique yields visualization
Validation measurements for the Fresnel approximation of the PO model
Validation measurements for the Fresnel approximation of the PO model I. De Coster2, E. Van Lill.2, B. Gavilanes Loureiro2, P. Delmotte2, A. Van de Capelle2 I Fund for Scientific Research (FWO), Flanders 2 Katholieke Universiteit Leuven(ESAT-TELEMIC), Belgium Kard. Mercierlaan 94, B-3001 Heverlee, tel. +32 1632 11 13 (fax: 1986) {irisdc,vanlil} @esat.kuleuven.ac.be ABSTRACT In [1] a Fresnel ap
CAD MODELS OF CONNECTORS AND TRANSITIONS USED IN HYBRID MICROWAVE INTEGRATED CIRCUITS
CAD MODELS OF CONNECTORS AND TRANSITIONS USED IN HYBRID MICROWAVE INTEGRA TED CIRCUITS lChramiec*, BJaniczak*, lKomisarczuk*, lK.Piotrowski #, W.Gwarek # Technical University of Gdansk, Faculty of Electronics, Telecommunication and Informatics, * Narutowicza 11/12, 80-952 Gdansk, Poland jec@pg.gda.pl # Warsaw University of Technology, Faculty of Electronics and Information Technology, Nowowiejska
FRACTIONAL DIVIDER CONCEPTS WITH PHASE-LOCK-CONTROL FOR THE GENERATION OF PRECISE LINEAR FREQUENCY RAMPS
FRACTIONAL DIVIDER FOR THE GENERATION CONCEPTS WITH PHASE-LOCK-CONTROL OF PRECISE LINEAR FREQUENCY RAMPS T. Musch, I. Rolfes, B. Schiek Ruhr-Universitat Bochum, Institut fUr Hochfrequenztechnik Universitatsstra.£e 150, D-44780 Bochum, Germany Telephone: +49 234 700 6496, Fax: +49 234 70 94 167 E-mail: tom@hf.ruhr-uni-bochum.de ABSTRACT A highly linear analog frequency ramp generator based on a
UNCERTAINTY ANALYSIS OF V-BAND ON-WAFER NOISE PARAMETER MEASUREMENT SYSTEM
UNCERTAINTY ANALYSIS OF V-BAND ON-WAFER NOISE PARAMETER MEASUREMENT SYSTEM M. Lahdes MilliLab, VTI Information Technology, P.O.Box 1202, FIN-02044 VIT, Finland e-mail: manu.lahdes@vtt.fi ABSTRACT A V-band on-wafer noise parameter measurement system and method are presented. Monte-Carlo analysis is used to determine the uncertainty of the measured noise parameters. The uncertainty budget and measu