sinopseV3n3.pdf - FEEC - Unicamp

Windows. Infelizmente o uso deste aplicativo depende
totalmente da visão, impossibilitando totalmente que o
deficiente visual trabalhe com ele. Contudo existe uma
ferramenta muito mais precisa que o Word que fornece
trabalhos de elevado nível de qualidade, esta ferramenta é o
LATEX. O LATEX, muito conhecido nos meios científicos,
permite a elaboração de trabalhos envolvendo fórmulas
matemáticas com uma qualidade superior ao Word e tem a
vantagem de que as fórmulas são elaboradas na forma de
textos, seguindo uma regra de formação e criando um programa
objeto a partir do qual as fórmulas são convertidas em imagens
e as figuras e textos são coladas no trabalho. O programa
LATEX também permite confeccionar em forma de textos
figuras geométricas que podem ser desenhadas seguindo uma
equação e também permite a inserção de figuras e imagens no
trabalho final. Dessa forma é perfeitamente viável que um
deficiente visual, usando o LATEX, possa redigir seus textos
científicos. Contudo, o LATEX contém um vasto compêndio de
regras de formação que dificulta seu aprendizado. Mesmo para
pessoas videntes exige um certo esforço de aprendizagem para
se utilizar o LATEX o que faz com que inúmeros videntes de
preferência por programas mais fáceis de se trabalhar. Um
outro problema do LATEX para o deficiente visual é a leitura
dos textos elaborados no LATEX que não traduz de forma
adequada a fórmula elaborada em LATEX de maneira a que o
deficiente visual possa ouvir e acompanhar corretamente as
fórmulas e textos elaborados em LATEX. Este trabalho
apresenta uma proposta de inclusão digital do deficiente visual
através da adaptação do LATEX às necessidades de uso pelos
deficientes visuais
Optical Amplitude Multiplexing through
Parametric Amplification: An Analysis for the
Idler Signal
André Costa, Marcelo Abbadel, J. D. Marconi, Felipe Rudge
Barbosa, Edson Moschim
In: IEEE/SBrT International Telecommunications Symposium
ITS 2010-Rafael Dueire Lins(Ed.) - ISBN: 978-85-89748-05-6
Manaus(AM) Brasil Sep-2010
Abstract: Recently a new technique that used parametric
amplification in optical fibers to combine two binary signals
into a single quaternary amplitude-shift keying (4-ASK) signal,
at frequency of signal to be amplified, was proposed. In this
paper, other new technique with use of parametric
amplification, also to combine two binary signals into a single
quaternary amplitude-shift keying (4-ASK) it is proposed,
however, the 4-ASK signal will be generated at idler frequency.
We also develop a theoretical model to predict the power level
distribution of the 4-ASK signals as a function of the extinction
ratios of the input binary signals. Computer simulation results
agree with the predictions of this theoretical model within a 1.3
dB margin. Finally, was also performed some simulation to
compare the propagation between 4-ASK idler signal with 4-
ASK probe signal. This technique could be applied to optically
generate optical packets.
Keywords: Optical signal processing, parametric
amplifiers (PA), quaternary-amplitude shift keying (4 -
ASK).
Optical tweezing double negative spherical
particles using arbitrary laser beams in an
arbitrary optical regime
Leonardo André Ambrósio, Hugo Enrique Hernandez Figueroa
In: 4 International Congress on Advanced Electromagnetic
Materials in Microwaves and Optics (Metamaterials)
Karlsruhe- Germany Sep-2010 pp:1 - 6
Abstract: The fundamental differences between gradient
forces over double-positive (DPS) and double-negative (DNG)
particles in optical trapping are outlined, using the generalized
Lorenz-Mie theory (GLMT) and the integral localized
approximation. For the first time in the literature, we analyze
how a DNG particle behaves under the influence of a Bessel
beam
Optimized Blind Algorithms for Widely Linear
Beamforming
Adilson Chinatto Jr, Cynthia Junqueira, João Romano
In: IEEE/SBrT International Telecommunications Symposium
ITS 2010-Rafael Dueire Lins(Ed.) - ISBN: 978-85-89748-05-6
Manaus(AM) Brasil Sep-2010
Abstract: The use of array beamforming in modern wireless
communication systems has been increasingly investigated, due
to their potential in rejecting interference and improving the
system capacity. The so-called blind algorithms have been
considered in such application in order to avoid training
procedures and improve the overall transmission throughput.
Most works in the field consider circular signals and classical
linear signal processing framework. However, the alternative
scenario of Widely Linear Processing was shown to be more
suitable under other circularity conditions, particularly in
rectilinear modulations schemes. This paper deals with blind
algorithms for array beamforming in a Widely Linear
Processing framework. We consider the well-known CMA and
NCMA algorithms and derive corresponding Widely Linear
formulations with optimized performance. In addition, we show
that their implementation requires less computational cost than
the original CMA and NCMA. Simulation results confirm that
both proposed algorithms perform better than their strictly
linear counterparts.
Keywords: widely linear processing, blind algorithms,
CMA, NCMA, beamforming
Optimizing Impedance Matching between the
Exciter -APEX and the GTEM Chamber
Humberto Xavier de Araujo, Luiz Carlos Kretly
In: 26 2010 IEEE 26-th Convention of Electrical and Electronics
Engineers - ISBN: 978-1-4244-8681-6
Eilat- Israel Nov-2010 pp:986 - 990
doi: 10.1109/EEEI.2010.5661925
Abstract: The EMC - Electromagnetic Compatibility for
Electronic Equipment is a critical task in several sectors in the
industrial environment. Different approaches support the
compliance tests and have consolidated standard and
regulations. In many cases, integrated circuits are the mainly
causes of interference in electronics equipments. In this work it
is shown the concept and models for matching the APEX
(exciter) and the GTEM chamber, which is the most important
and critical step on the construction of the system and its
optimization. Also, it is shown the basic concepts to design this
versatile chamber, projected to operate from 500 MHz - 18
GHz, employed in pre-compliance tests and electromagnetic
compatibility for automotive/ electronic boards and integrated
circuits. The GTEM chamber has some advantages over the
others test setups, mainly in economic terms and the operational
frequency range.
Keywords: TEM cells, automotive electronics,
electromagnetic compatibility, electronic equipment
testing, exciters, impedance matching, optimisation
Outage Probability of Multibranch Diversity
Receivers with Cochannel Interference in
Generalized Fading Scenarios
Alexandre Campos Moraes, Daniel Benevides Da Costa,
Michel Daoud Yacoub
In: 13 International Symposium on Wireless Personal
Multimedia Communications ISWPMC
Recife, PE Oct-2010 pp:1-6
Abstract: Wireless systems in a frequency reuse environment
are subject to cochannel interference, and, in order to improve
their performance, diversity techniques are deployed.
Unfortunately, the exact analysis of the outage probability of
equal-gain combining receivers in such a condition is rather
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