Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
FULLY INTEGRATED QPSK LINEAR VECTOR MODULATOR FOR SPACE APPLICATIONS IN Ku BAND
FULL Y INTEGRA TED QPSK LINEAR VECTOR MODULATOR FOR SPACE APPLICATIONS IN Ku BAND P. BOUTET *, J. DUBOULOY *, M. SOULARD *, J. PINHO ** * ALCA TEL SPACE / LEMMIC - 5, rue Noel Pons - 92734 NANTERRE Cedex - FRANCE ** ALCATEL SPACE - 26, av JF. Champollion - 31037 TOULOUSE Cedex - FRANCE Abstract This paper describes the design and the measured results of fully integrated QPSK linear vector modulat
MVDS Overview -Regulations, Applications and Trials
MVDS Overview - Regulations, Applications and Trials Dave Palmer Philips Broadband Networks, Tatton House, Caldey Road, Manchester M23 9PT, UK david.palmer@pbn-mnc.be.philips.com ABSTRACT This paper is intended to give a review of one of the now fast growing commercial applications of millimeter-wave wireless technology. Microwave Video Distribution System (MVDS) or some times known as Local M
SATELLITE SYSTEM FOR MULTIMEDIA AND MOBILE TELECOMMUNICATIONS
SATELLITE SYSTEM FOR MULTIMEDIA AND MOBILE TELECOMMUNICATIONS Christian TRaNCHE ALCATEL SPACE 26, Avenue JF Champollion ,31037 TOULOUSE CEDEX FRANCE Tel: 33 (0) 5 34 35 57 95 ABSTRACT This paper describes briefly different satellite systems that address mainly two areas in full evolution, namely: the mobile telephony and the multimedia. New infrastructures, based on the deployment of cellular ne
GaAs a key RF technology - Industrialisation & competition
GaAs a key RF technology E.Pettenpaul - Industrialisation & competition Siemens Semiconductor Group Balanstr. 73 0-81541 MOnchen e-mail: Ewald.Pettenpaul@hLsiemens.de Abstract GaAs components in MESFET, HEMT and HBT technology are a valuable supplement to traditional Si RF technologies and cover 15 to 20% of all RF applications. Their major application potential is in power amplifiers for mobi
FAST TWO-DIMENSIONAL DIFFRACTION MODELLLING FOR MOBILE RADIO PROPAGATION PREDICTION IN URBAN MICRO-CELLULAR ENVIRONMENTS
FAST TWO-DIMENSIONAL DIFFRACTION MODELLL"IG FOR MOBILE RADIO PROPAGATION PREDICTION IN URBAN MICRO-CELLULAR ENVIRONMENTS W. Zhang' ,1. Lahteenrnaki 2 , P. Vainikainen 3 ,H. El-Sallabi 4 . ., - VTT Information Technology, P. O. Box 1202, FIN-02044 VTT, Finland, Jaakko.Lahteenmaki@vn.fi ABSTRACT The paper presents fast two-dimensional (2-D) diffraction modelling in the horizontal plane for site-sp
IMPACT OF EDGE DIFFRACTION ON THE PERFORMANCE OF LAND MOBILE SATELLITE SYSTEMS IN URBAN AREAS
IMPACT OF EDGE DIFFRACTION ON THE PERFORMANCE OF LAND MOBILE SATELLITE SYSTEMS IN URBAN AREAS C. Oestges, H. Vasseur, D. Vanhoenacker Microwaves VCL, Maxwell building, Place du Levant 3, B-1348 Louvain-la-Neuve, Belgium oestges@emic.ucl.ac.be ABSTRACT This communication highlights the influence of edge diffraction on the performance of land mobile satellite (LMS) systems in urban environments. Th
A COMPARISON OF COHERENCE BANDWIDTH MEASUREMENTS AT 11.2 AND 62.4GHz FOR INDOOR LINE OF SIGHT MICROCELLS
A COMPARISON OF COHERENCE BANDWIDTH MEASUREMENTS AT 11.2 AND 62.4GHz FOR INDOOR LINE OF SIGHT MICRO CELLS Jean-philippe Kennoal *, A. Hammoudeh*, M. Sanchez ° University of Glamorgan, School of Electronics, Pontypridd, CF37 IDL, UK * amhammou@glam.ac.uk 0 Universidade de Vigo, Departamento de Tecnoloxfas das Comunicaci6ns, 36200 VIGO, Spain mgarcia@tsc.uvigo.es ABSTRACT A series of mobile radio me
EVALUATION OF DIVERSITY TECHNIQUES IN COMPLEX INDOOR ENVIRONMENTS
EVALUATION OF DIVERSITY TECHNIQUES ENVIRONMENTS IN COMPLEX INDOOR Ch. Ghobadi, S.H. Pennock, P.R. Shepherd Department of Electronic and Electrical Engineering University of Bath, Bath, BA2 7AY, United Kingdom eepchg@bath.ac. uk, eessrp@bath.ac.uk, eesprs@bath.ac. uk Abstract In this work we use a deterministic approach to model radio propagation channels in complex environments. The model is
HIGH TIME DOMAIN RESOLUTION INDOOR CHANNEL SOUNDER FOR THE 60 GHz BAND
IDGH TIME DOMAIN RESOLUTION INDOOR CHANNEL SOUNDER FOR THE 60 GHzBAND S. Guillouard, G. EI Zein, J. Citerne L.C.S.T. - UPRESA CNRS n06075 - INSA de Rennes 20, avenue des Buttes de Coesmes - 35043 Rennes Cedex - France samuel.guillouard@insa-rennes.fr ABSTRACT A very high time domain resolution channel sounder dedicated to the 60 GHz band indoor channel is presented. Based on Cox technique, it pr
Predistorted Distributed Active Filters
Predistorted Distributed Active Filters Ndujiuba C.U. and Khanifar A Dept of Electronic and Electrical Eng; University College London Torrington Place London WCIE 7JE 1 Abstract This paper outlines a novel and systematic method for designing active microwave filters in Microwave Integrated Circuits (MICs) technology. The technique is based on predistortion of the filter transfer function by app