Archive for UBI Covilhã

14 Nov 2013
News

1st Workshop from the CREaTION Project on the 18 November 2013

1st Workshop from the CREaTION Project in Research Lines of Excellence

Instituto de Telecomunicações, Departamento de Engenharia Electromecânica

Faculdade de Engenharia (Sala dos Conselhos, manhã)

Faculdade de Ciências da Saúde (Anfiteatro Verde, almoço e tarde)

Universidade da Beira Interior

18 November 2013

 Sessão da manhã, Faculdade de Engenharia, Sala dos Conselhos

11:00 Henrique Saraiva, Development of electromagnetic energy harvesting devices applied to WBANs Presentation_1

12:00 Equipa do CREaTION, Demonstrador de dispositivos de recolha de energia electromagnética integrados em vestuário e aplicados a redes sem fios de área corporal (RF energy harvesting devices applied to WBANs) Poster

 

Sessão da tarde, Faculdade de Ciências da Saúde, Anfiteatro Verde

14:00 José Machado da Silva and João Carvalho, Applications of software defined radios to eHealth Presentation_2

14:25 Luís M. Borges, Rodolfo Oliveira and Fernando J. Velez, Opportunistic electromagnetic energy harvesting enabled IEEE 802.15.4 MAC protocols employing multi-channel scheduled channel polling Presentation_3

14:50 Norberto Barroca, Luís M. Borges, Fernando J. Velez and Periklis Chatzimisios, Innovative energy efficient IEEE 802.15.4 MAC sub-layer protocol with packet concatenation employing RTS/CTS and Block Acknowledgment Presentation_4

Pausa para café

15:15 André Prata, All digital transmitter for multi-carrier, multi-standard communications

15:40 Diogo Ribeiro, Synchronous Frequency-Domain Measurements for the Extraction of X-parameters in Digital to Analog Transmitters Presentation_6

16:05 Daniel Malafaia, Distributed spectrum sensing methods for spectrum holes detection Presentation_7

16:30 Jessica Acevedo Flores, Daniel Robalo and Fernando J. Velez, Cost/revenue performance of LTE employing spectrum aggregation with multi-band user allocation over two frequency bands Presentation_8

16:55 António Espirito Santo, Energy harvesting from organic materials Presentation 9

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06 Nov 2013
News

RF Energy Harvesting Devices

In the context of the CREaTION (EXCL/EEI-TEL/0067/2012) project, contributions will be given in the development of innovative circuits for electromagnetic energy harvesting. A five-stage Dickson voltage multiplier prototype with no match impedance has already been conceived and presented in the IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications Conference.

DSC_0212

Future work on the development of harvesting devices, includes, a match impedance circuit by means of stubs, where they can be terminated by a short or an open circuit, as well as, improving  the  process  of  manufacturing  the  printed circuit  boards,  enabling to reach values for the conversion efficiency closer to the ones obtained by means of simulation.

DSC_0183

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06 Nov 2013
Conference Papers • Publications

Conference Papers

Norberto Barroca, Paulo T. Gouveia and Fernando J. Velez, “Impact of Switching Latency Times in Energy Consumption of IEEE 802.15.4 Radio  Transceivers,”  in  Proc.  of  The  9th  Conference  on Telecommunications –  Conftele 2013, Castelo Branco, Portugal, May 2013.

Norberto Barroca, Luís M. Borges, Jorge Tavares, Fernando J. Velez, Raúl Chavéz-Santiago and Ilangko Balasingham “Identification of the Opportunistic  Radio  Frequency  Bands  for  Energy  Harvesting  in Wireless  Body  Area  Networks,”  in  Proc.  of  the  9th  Conference  on Telecommunications –  Conftele 2013, Castelo Branco, Portugal, May 2013.

Norberto  Barroca,  Fernando  J.  Velez  and  Periklis  Chatzimisios, “Block Acknowledgment Mechanisms for the optimization of channel use  in  Wireless  Sensor  Networks”,  in  Proc.  of  the  24th  Annual  IEEE International  Symposium  on  Personal,  Indoor  and  Mobile  Radio Communications (PIMRC 2013), London, UK, September 2013.

Norberto  Barroca,  Henrique  M.  Saraiva,  Paulo  T.  Gouveia,  Jorge Tavares,  Luís  M.  Borges,  Fernando  J.  Velez,  Caroline  Loss,  Rita Salvado,  Pedro  Pinho,  Ricardo  Gonçalves,  Nuno  Borges  Carvalho, Raúl  Chavéz-Santiago,  Ilangko  Balasingham,  “Antennas  and  Circuits for Ambient RF Energy Harvesting in Wireless Body Area Networks”, in  Proc.  of  the  24th  Annual  IEEE  International  Symposium  on  Personal,  Indoor  and  Mobile  Radio  Communications  (PIMRC  2013), London, UK, September 2013.

Henrique  M.  Saraiva,  Luís  M.  Borges,  Norberto  Barroca,  Paulo  T. Gouveia,  Jorge  Tavares,  Fernando  J.  Velez,  Caroline  Loss,  Rita Salvado,  Pedro  Pinho,  Ricardo  Gonçalves,  Nuno  Borges  Carvalho, Raúl  Chavéz-Santiago,  Ilangko  Balasingham,  “Experimental Characterization  of  Wearable  Antennas  and  Circuits  for  RF  Energy Harvesting  in  WBANs”,  submitted  to  The  IEEE  79th  Vehicular Technology Conference: VTC2014-Spring, Seoul, Korea, February 2014.

Norberto Barroca, Fernando J. Velez and Periklis Chatzimisios, “IEEE 802.15.4 MAC Layer Performance Enhancement by employing RTS/CTS combined with Packet Concatenation”, submitted to IEEE International Conference on Communications (ICC), Sydney, Australia, Jun. 2014.

Luís M. Borges, Rodolfo Oliveira and Fernando J. Velez, “A Two-Phase Contention Window Control Scheme for Decentralized Wireless Networks”, submitted to the IEEE Wireless Communications and Networking Conference (WCNC 2014), Istanbul, Turkey, April 2014.

Rodolfo Oliveira, Luís M. Borges, and Fernando J. Velez, “A Double Stage Random Access Scheme for Decentralized Single Radio Cognitive Networks”, in Proc. of The Tenth International Symposium on Wireless Communication Systems (ISWCS’13), Ilmenau, Germany, August 2013.

Luís M. Borges, Fernando J. Velez, António S. Lebres and Norberto Barroca, “Frame Capture Effect and Reliability Based Decider Implementation in the MiXiM IEEE 802.15.4 Simulator Framework”, submitted to the 7th International ICST Conference on Simulation Tools and Techniques (SIMUTools 2014), Lisbon, Portugal, March 2014.

Jessica Acevedo Flores, Daniel Robalo and Fernando J. Velez, “Transmitted Power Formulation for the Implementation of Spectrum Aggregation in LTE-A over 800 MHz and 2 GHz Frequency Bands,” in Proc. of WPMC 2013 – International Symposium on Wireless Personal Multimedia Communications, Atlantic City, New Jersey, USA, June 2013.

 

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06 Nov 2013
Journal Papers • Publications

Journal Papers

Luís M. Borges, Fernando J. Velez and António S. Lebres, “Taxonomy for the Characterization and Classification of Wireless Sensor Networks Applications,” accepted for publication in IEEE Communications Surveys & Tutorials, April 2014.

Fernando J. Velez, João R. Oliveira, Daniel Robalo, Oliver Holland and A. Hamid t, “Optimization of the Planning of WiMAX Networks with Relay Power Savings Modes: Measurement-Based Scenario in Hilly Region,” submitted to Radio Science (invited paper), September 2013.

Norberto Barroca, Fernando J. Velez and Periklis Chatzimisios, “Performance Analysis of IEEE 802.15.4 by Using CSS PHY and RTS/CTS Combined with Packet Concatenation”, to be submitted IEEE Communications Letters, November 2013.

 

 

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06 Nov 2013
Professors

Fernando J. Velez

Fernando J. Velez (M’93–SM’05) received the Licenciado, M.Sc. and Ph.D. degrees in Electrical and Computer Engineering from Instituto Superior Técnico, Technical University of Lisbon in 1993, 1996 and 2001, respectively. Since 1995 he has been with the Department of Electromechanical Engineering of Universidade da Beira Interior, Covilhã, Portugal, where he is Assistant Professor, and he is also a researcher at Instituto de Telecomunicações. Fernando was an IEF Marie Curie Research Fellow in King’s College London in 2008/09 (OPTIMOBILE IEF) and a Marie Curie ERG fellow at Universidade da Beira Interior from 2010 until March 2013 (PLANOPTI ERG). He made or makes part of the teams of RACE/MBS, ACTS/SAMBA, COST 259, COST 273, COST 290, IST-SEACORN, IST-UNITE, COST 2100, COST IC0902, COST IC0905 “TERRA” and COST IC1004 European projects, he participated or is participating in SEMENTE, SMART-CLOTHING, UBIQUIMESH, NEUF (LTE-Advanced Enhancements using Femtocells) and CREaTION (Cognitive Radio Transceiver Design for Energy Efficient Data Transmission) Portuguese projects, and he was or is the coordinator of six Portuguese projects: SAMURAI, MULTIPLAN, CROSSNET, MobileMAN, OPPORTUNISTIC-CR and PROENERGY-WSN. He is the coordinator of the WG2 (on Cognitive Radio/Software Defined Radio Co-existence Studies) of COST IC0905 “TERRA”. He has authored two books, twelve book chapters, 115 papers and communications in international journals and conferences, plus 29 in national conferences, is a senior member of IEEE and Ordem dos Engenheiros (EUREL), and a member of IET. Prof. Velez is the chair from the IEEE VTS Portugal Chapter since 2006, VTS Region 8 (Europe and Africa) Chapter Coordinator since 2010, member of the commission for the coordination of the specialization on Telecommunications from Ordem dos Engenheiros since 2007 and adjunct-coordinator of the same commission since 2013. His main research areas are cellular planning tools, traffic from mobility, cross-layer design, radio resource management, spectrum sharing/coexistence/aggregation, and cost/revenue performance of advanced mobile communication systems.

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