37,130 research outputs found
An optimized neural network for monitoring key performance indicators in HSDPA
No full textHSDPA (High Speed Downlink Packet Access) is drawing great attention as the 3.5G technology capable of providing higher data rate packet switch services over Universal Mobile Telecommunication System (UMTS) to support broadband services like multimedia conferencing, VoIP, or high-speed internet access. The paper proposes the use of a Learning Vector Quantization (LVQ) Neural Network able to estimate the quality of service (QoS) across analysis of Key Performance Indicators (KPIs) and to provide automatically a possible classification of warnings related to the load status of HSDPA radio resources or to the bad radio channel quality condition. ©2010 IEEE
Performance analysis and enhancements for IEEE 802.11e wireless networks
No full textThis article is posted here with persmission from IEEE - Copyright @ 2005 IEEEThe IEEE 802.11 WLAN legacy standard cannot provide QoS support for multimedia
applications. Thus, considerable research efforts have been carried out to
enhance QoS support for 802.11. Among them, 802.11e is the upcoming QoSenhanced
standard proposed by the IEEE working group. This article describes in
detail the new QoS features of 802.11e based on the latest version of the standard
draft. We investigate the performance of 802.11e through computer simulations.
Using simple examples, we show the effectiveness of adaptive schemes
under the 802.11e framework.This work was supported in part by the French National Telecommunication Research Project (VTHD++) and Science Foundation Ireland WLAN Project (grant no. 03/IN3/I396
Readout Electronics for Flat Panel PSPMT with Multiple CPU and Full Parallel Acquisition
No full textLC compensators for power factor correction of nonlinear loads
No full textThis material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. Copyright @ 2004 IEEEA method is presented for finding the optimum fixed LC compensator for power factor correction of nonlinear loads where both source voltage and load current harmonics are present. The LC combination is selected because pure capacitive capacitors alone would not sufficiently correct the power factor. Optimization minimizes the transmission loss, maximizes the power factor, and maximizes the efficiency. The performance of the obtained compensator is discussed by means of numerical examples
IEEE RAS AdCom Member
No full textIEEE Robotics and Automation Society (RAS) elected member of the AdCo
PESC99 record : 30th Annual IEEE Power Electronics Specialists Conference /
No full text"30th IEEE Power Eelctronics Specialists Conference [was held] in Charleston ..."--Page iii"Formerly Power Conditioning Specialists Conference 1970-71, Power Processing and Electronic Specialists Conference 1972.""IEEE Catalog Number 99CH36321 (softbound); 99CB36321 (casebound); 99CH36321C (CD-ROM)"--Title page versoIncludes bibliographical references and author indexes
Wireless broadband access: WiMAX and beyond - Investigation of bandwidth request mechanisms under point-to-multipoint mode of WiMAX networks
No full textThe WiMAX standard specifies a metropolitan area broadband wireless access air interface. In order to support QoS for multimedia applications, various bandwidth request and scheduling mechanisms are suggested in WiMAX, in which a subscriber station can send request messages to a base station, and the base station can grant or reject the request according to the available radio resources. This article first compares two fundamental bandwidth request mechanisms specified in the standard, random access vs. polling under the point-to-multipoint mode, a mandatory transmission mode. Our results demonstrate that random access outperforms polling when the request rate is low. However, its performance degrades significantly when the channel is congested. Adaptive switching between random access and polling according to load can improve system performance. We also investigate the impact of channel noise on the random access request mechanism
IEEE Senior Member
No full textElevazione a grado di "Senior Member" della IEEE (Institute of Electrical and Electronics Engineers) a seguito di nomination da parte di tre figure di livello internazionale (di cui due straniere) e della valutazione da parte del board IEEE su almeno 10 anni di attività lavorativa (attività esclusivamente scientifica in qualità di ricercatore/professore universitario), riconoscendo una performance significativa di almeno 5 anni
PESC2001 : 2001 IEEE 32nd Annual Power Electronics Specialists Conference : conference proceedings ; Vancouver, Canada, June 17-21, 2001 /
No full text"IEEE Catalog Number 01CH37230.Includes bibliographical references and author indexes
- …
