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IAPR International Conference on Biometrics (ICB)

作者： M. Günther A. Costa-Pazo C. Ding E. Boutellaa G. Chiachia H. Zhang M. de Assis Angeloni V. Štruc E. Khoury E. Vazquez-Fernandez D. Tao M. Bengherabi D. Cox S. Kiranyaz T. de Freitas Pereira J. Žganec-Gros E. Argones-Rúa N. Pinto M. Gabbouj F. Simões S. Dobrišek D. González-Jiménez A. Rocha M. Uliani Neto N. Pavešić A. Falcão R. Violato S. Marcel Idiap Research Institute (CH) Galician Research and Development Center in Advanced Telecommunications (ES) Spain University of Technology Sydney AUS Centre de Développement des Technologies Avancées Algeria Centre de Développement des Technologies Avancées (DZ) University of Campinas (BR) Brazil Tampere University of Technology (FIN) Finland 7CPqD (BR) Brazil University of Ljubljana SLO Slovenia Idiap Research Institute Switzerland Harvard University US Alpineon Limited Slovenia Alpineon Ltd. (SLO) Galician Research and Development Center in Advanced Telecommunications (ES) Advanced Telecommunications Galician Research and Development Center Spain University of Campinas Brazil Tampere University of Technology (FIN) 7CPqD (BR) University of Ljubljana SLO University of Campinas (BR)

Automatic face recognition in unconstrained environments is a challenging task. To test current trends in face recognition algorithms, we organized an evaluation on face recognition in mobile environment. This paper presents the results of 8 different participants using two verification metrics. Most submitted algorithms rely on one or more of three types of features: local binary patterns, Gabor wavelet responses including Gabor phases, and color information. The best results are obtained from UNILJ-ALP, which fused several image representations and feature types, and UC-HU, which learns optimal features with a convolutional neural network. Additionally, we assess the usability of the algorithms in mobile devices with limited resources.

关键词： Feature extraction Probes Computational modeling Histograms Face recognition Training Face

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R-SOA based extender for XG-PON/G-PON applications

R-SOA based extender for XG-PON/G-PON applications

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Optical Fiber Communication Conference, OFC 2012

作者： Rosolem, Joao B. Paiva, Getulio E.R. Duarte, Ulysses R. CPqD-Research and Development Center in Telecommunications Rod. Campinas-Mogi km 118.5 Campinas SP 13086-902 Brazil

Reflective semiconductor optical amplifiers were used in a downstream extender for GPON and XG-PON applications. The performance of the R-SOA extender was demonstrated in a PON test bed using 1:64 splitter and 64.5 km... 详细信息

ISBN: (纸本)9781557529381

关键词： Semiconductor optical amplifiers

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100 Gbit/s Scrambler Architectures for OTN Protocol: FPGA Implementation and Result Comparison

100 Gbit/s Scrambler Architectures for OTN Protocol: FPGA Im...

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IEEE International Midwest Symposium on Circuits and Systems

作者： Arley Salvador Valentino Corso CPqD Research and Development Center in Telecommunications

This paper describes and compares two scrambler architectures developed and implemented in an advanced field programmable gate array (FPGA), with applications in 100 Gbit/s optical transport network (OTN) systems.

ISBN: (纸本)9781467325264

关键词： Generators Polynomials Registers Combinational circuits Field programmable gate arrays Clocks Frequency modulation

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Algorithm for energy efficient lightpath establishment in WDM networks

Algorithm for energy efficient lightpath establishment in WD...

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IEEE International Conference on Communications

作者： Rafael A. Scaraficci Nelson L. S. da Fonseca Marcos R. Salvador Institute of Computing University of Campinas CPqD - Telecommunications Research and Development Center

ISBN: (纸本)9781457720529

The problem of lightpath provisioning in WDM optical networks has been extensively studied to reduce cost and blocking, but there is still a need of investigating this problem from a power consumption perspective. In this paper, we introduce a novel algorithm for IP/MPLS over WDM networks based on a reduced auxiliary graph that limits the solution space and captures the power consumption of lightpath provisioning. Results derived via simulation demonstrate that our strategy is energy efficient and that it is able to produce acceptable blocking ratio which are close to values produced by algorithms oriented to the reduction of blocking.

关键词： wavelength division multiplexing network optical paths Energy efficiency Power consumption Solution space BLOCKING algorithms Fiber optic networks

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Upgrading and extending PON by using in-band WDM overlay

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Journal of Microwaves, Optoelectronics and Electromagnetic Applications 2012年第1期11卷 15-25页

作者： Penze, Rivael Strobel Rosolem, Joao Batista Filho, Renato Baldini CPqD Research and Development Center in Telecommunications Campinas SP Brazil University of Campinas Campinas SP Brazil

This paper presents a new approach to upgrade and extend the reach of the current passive optical network (PON) by using wavelength division multiplexing (WDM) in the standardized optical grid of gigabit PON (In-band WDM PON overlay). The aim is to increase the number of optical distribution networks (ODNs) fed by a single fiber while preserving the users bandwidth. In this approach four downstream (DS) wavelength signals are transmitted from an optical line terminal (OLT) to four different ODNs using the standard DS PON spectrum ranging from 1480 to 1500 nm. The upstream (US) signals from the four different ODNs are also wavelength multiplexed within the standardized US PON spectrum ranging from 1270 to 1330 nm. Experimental proofs of concept are presented in a 20 km PON serving 32 ONTs and in a 58 km extended PON in order to demonstrate the feasibility of this proposal. © 2012 SBMO/SBMag.

关键词： Passive optical networks

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The stationary lithium-ion battery in Brazil

The stationary lithium-ion battery in Brazil

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International Conference on telecommunications Energy (INTELEC)

作者： Alexandre Pinhel Soares Aristides Antônio Silva Filho Alexandre Carlos Ribeiro Reis Maria de Fátima N. C. Rosolem Glauco Ribeiro dos Santos Vitor Torquato Arioli Rodrigo Samuel Nazari Raul Fernando Beck Kaue Tebaldi Miranda Eletrobras Furnas Rio de Janeiro RJ Brazil CPqD Foundation - Telecommunications Research and Development Center Rod. Campinas - Mogi-Mirim km 118.5 - CEP: 13086-902 SP Brazil CPqD Foundation - Telecommunications Research and Development Center Campinas SP Brazil

Many of the Telecommunication Systems used by companies of the Electric Sector (Utilities) are essentials and causes direct impact on the main business, being indispensable that it work without interruptions. As some of the outages on the telecommunications are caused by associated energy systems, every improvement done on these systems affects the process chain. But as those systems act on the background, sometimes they hide systemic problems. This situation can be seen currently in a specific type of battery that is common in this area. Looking for to solve this problem, Eletrobras Furnas has been researching, together with telecommunications research and development center (cpqd), the application of the lithium-ion battery technology, a pioneer initiative in Latin America. This work presents details about the research and the strategy adopted by the company since 2005 to introduce this technology in Brazil.

关键词： Batteries telecommunications Discharges (electric) Standards Companies Maintenance engineering Battery charge measurement

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The stationary lithium-ion battery in Brazil

The stationary lithium-ion battery in Brazil

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2012 IEEE 34th International telecommunications Energy Conference, INTELEC 2012

作者： Soares, Alexandre Pinhel Filho, Aristides Antônio Silva Reis, Alexandre Carlos Ribeiro Rosolem, Maria De Fátima N. C. Dos Santos, Glauco Ribeiro Arioli, Vitor Torquato Nazari, Rodrigo Samuel Beck, Raul Fernando Miranda, Kaue Tebaldi Eletrobras Furnas Rua: Real Grandeza 219 Botafogo - CEP 22283-900 Rio de Janeiro - RJ Brazil CPqD Foundation Telecommunications Research and Development Center Rod. Campinas - Mogi-Mirim km 118.5 CEP: 13086-902 Campinas - SP Brazil

ISBN: (纸本)9781467309998

关键词： Lithium-ion batteries

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A MIMO-OFDM scheme with full-diversity in frequency for time-varying channels

A MIMO-OFDM scheme with full-diversity in frequency for time...

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IEEE Symposium on Communications and Vehicular Technology (SCVT)

作者： Ricardo Seiti Yoshimura Leonardo Silva Resende Juliano João Bazzo Center of Research and Development in Telecommunications-CPqD Campinas Sao Paulo Brazil Department of Electrical Engineering Federal University of Santa Catarina Florianopolis Santa Catarina Brazil

The project of wireless communication systems with the purpose to minimize the bit error rate is a current problem and it is motivated increasingly by the growing demand for higher data rates. In this sense, this work proposes a frequency, time and space diversity technique, which applies a space-time code with block repetitions such that space-frequency diversity is obtained, combined with the time spreading of OFDM symbol through Hadamard transform. Simulations showed that performance gain was achieved in high Doppler frequency scenarios followed by improved results at degraded frequency selective fading channels modeled by Rayleigh distributions.

关键词： OFDM Frequency diversity Fading Doppler effect Receivers Space-time codes Transforms

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Dynamic monochannel first-order polarization mode dispersion compensation through downhill simplex optimization

Dynamic monochannel first-order polarization mode dispersion...

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2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2011

作者： Simões, Glauco C. C. P. Floridia, Claudio Argentato, Márcio C. CPqD Foundation Research and Development Center in Telecommunications Campinas Brazil

ISBN: (纸本)9781457716621

In this paper we present results of a dynamic monochannel first-order polarization mode dispersion compensator, revisiting a simple compensation technique which deals separately with the state of polarization of the polarization controller output through a non-linear optimization technique and the differential group delay line compensation. © 2011 IEEE.

关键词： Polarization mode dispersion

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Deployment of IPv6 testbed in a research network with GPON access technology

Deployment of IPv6 testbed in a research network with GPON a...

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2011 3rd International Congress on Ultra Modern telecommunications and Control Systems and Workshops, ICUMT 2011

作者： Pozzuto, J.F. Tognolli Jr., J.O. Martins, L. Sanches, M.A.B. De A. Chaves, N.S. Access Department CPqD - Research and Development Center in Telecommunications Campinas SP Brazil

ISBN: (纸本)9781457706820

This paper presents the implementation of an IPv6 Testbed performed on the Experimental Network of GIGA Project and some experimental results, where the use of IPv6 integrated to current and emerging technologies used in LAN, MAN and WAN - 10 Gigabit Ethernet, DWDM and GPON was tested. These protocols and technologies are part of a brand new technological scenario that has great perspectives to be more and more adopted in the coming years. © 2011 HTE.

关键词： Testbeds

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