Papers by G. M. De Araujo
The International Journal of FORENSIC COMPUTER SCIENCE IJOFCS, 2008
In this paper, we present concepts in artificial neural networks (ANN) to help detect intrusion a... more In this paper, we present concepts in artificial neural networks (ANN) to help detect intrusion attacks against network computers, and introduce and compare a multi-layer perceptron ANN (MLPANN) with Snort, an open-source tool for intrusion detection systems (IDS). To conduct these comparison experiments, we inserted malicious traffic into the MLPANN to train our ANN, with results indicating that our ANN detected 99% of these input attacks.
Projeto de estruturas de um processador risc para aplicação em um soc para controle de irrigação
X Workshop …, 2004
... No modo de teste, as saídas dos multiplexadores correspondem à saída de uma única célula isol... more ... No modo de teste, as saídas dos multiplexadores correspondem à saída de uma única célula isolada, enquanto que no modo normal, as saídas dos multiplexadores correspondem às saídas do banco completo. ... [8] Sedra, Adel S. e Smith, Kenneth C. , Microeletrônica Makron ...
CMOS SoC for irrigation control
2005 Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005
A CMOS VLSI system on chip, designed for irrigation control applications was developed. The SoC f... more A CMOS VLSI system on chip, designed for irrigation control applications was developed. The SoC features include wireless communication capability, data processing, sensor signal acquisition and actuator control. A power saving strategy provides long-term autonomy with standard energy sources. Application software and dedicated software development CAD tools were also implemented in this design effort.
Design of a PSWF impulse response filter for UWB systems
2012 IEEE International Symposium on Circuits and Systems, 2012
ABSTRACT This work presents a method of UWB pulse generation based in Prolate Spheroidal Wave Fun... more ABSTRACT This work presents a method of UWB pulse generation based in Prolate Spheroidal Wave Functions (PSWF). The method consists of a numerical approximation, a Padé approach and a state-space optimization. Therefore, a filter with a PSWF impulse response for UWB systems is designed. The generated pulse from the filter can be used in multiple access schemes and have some advantages over the Gaussian monocycle pulses with respect to better matching with the spectral mask defined by the Federal Communications Commission (FCC) for UWB applications.
UWB pulses generator filter for M-ary communication systems
This work proposes an M-ary communication system based on PSWF pulses. First, a State Space Filte... more This work proposes an M-ary communication system based on PSWF pulses. First, a State Space Filter whose impulse response is a PSWF pulse is developed. Then, it is modified to obtain the first and second order pulses. Finally, an M-ary communication system for UWB using this set of orthogonal pulses is proposed.
Design of a PSWF impulse response filter for UWB systems
2012 IEEE International Symposium on Circuits and Systems, 2012
ABSTRACT This work presents a method of UWB pulse generation based in Prolate Spheroidal Wave Fun... more ABSTRACT This work presents a method of UWB pulse generation based in Prolate Spheroidal Wave Functions (PSWF). The method consists of a numerical approximation, a Padé approach and a state-space optimization. Therefore, a filter with a PSWF impulse response for UWB systems is designed. The generated pulse from the filter can be used in multiple access schemes and have some advantages over the Gaussian monocycle pulses with respect to better matching with the spectral mask defined by the Federal Communications Commission (FCC) for UWB applications.
UWB pulses generator filter for M-ary communication systems
2012 IEEE International Conference on Ultra-Wideband, 2012
ABSTRACT This work proposes an M-ary communication system based on PSWF pulses. First, a State Sp... more ABSTRACT This work proposes an M-ary communication system based on PSWF pulses. First, a State Space Filter whose impulse response is a PSWF pulse is developed. Then, it is modified to obtain the first and second order pulses. Finally, an M-ary communication system for UWB using this set of orthogonal pulses is proposed.
RESUMO Neste trabalho foram implementadas as estruturas que compõem um processador RISC CMOS de 1... more RESUMO Neste trabalho foram implementadas as estruturas que compõem um processador RISC CMOS de 16 bits, em tecnologia 0.35 um, utilizando uma metodologia hierárquica de projeto. O processador em questão é parte integrante de um sistema em chip (SoC) para comunicação sem fio em um sistema de controle de irrigação. Foram desenvolvidas uma ULA de 16 bits, a unidade de controle do processador, o banco de registradores, as memórias ROM e RAM e o controlador de interrupção utilizando técnicas de projeto orientado à testabilidade. Os módulos foram projetados e simulados utilizando ferramentas do CADENCE, e atenderam às especificações previamente definidas. Após validadas, as estruturas foram enviadas para fabricação. ABSTRACT In this paper structures of a CMOS 16-bit RISC microprocessor in technology 0.35 um were developed using a hierarchical approach. This microprocessor is part of a wireless communication System-on-Chip (SoC), which will be used for irrigation control on crops. A 16-bi...
CMOS SoC for irrigation control
2005 Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005
A CMOS VLSI system on chip, designed for irrigation control applications was developed. The SoC f... more A CMOS VLSI system on chip, designed for irrigation control applications was developed. The SoC features include wireless communication capability, data processing, sensor signal acquisition and actuator control. A power saving strategy provides long-term autonomy with standard energy sources. Application software and dedicated software development CAD tools were also implemented in this design effort.
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Papers by G. M. De Araujo