Papers by C. Silva-cardenas
Diseño de un modulador FM basado en la tecnología Software Radio
This work proposes an FPGA implementation of software radio architecture for a FM modulator. The ... more This work proposes an FPGA implementation of software radio architecture for a FM modulator. The architecture is based on the Altera Nios II ® soft-processor. The frequency synthesis is performed by the digital direct synthesizer. It's a real time system that uses an audio codec WM8731 [1] to acquire the audio signal. This signal is adapted to be a parameter of the DDS. Then the digital signal produced by the DDS is transformed to the analog domain using a 10-bit video DAC ADV7123 [2].
IEEE Transactions on Nuclear Science, 2013
In this paper are described measurements at highaltitude of both radiation environment and effect... more In this paper are described measurements at highaltitude of both radiation environment and effects. These measurements integrate cosmic ray neutrons and SEU/MCU on nano-scales devices. Results obtained at Pic-du-Midi are presented and analyzed. Analyses based-on MUSCA SEP 3 calculations shows a good agreement between experimental data and modeling, thus illustrating the importance of the knowledge of the radiative field for a reliable prediction.
High altitude experiments to evaluate SEU sensitivity of advanced SRAMs
HAL (Le Centre pour la Communication Scientifique Directe), Mar 25, 2009
International audienceIntegrated circuits are sensitive to the effects of natural radiation. This... more International audienceIntegrated circuits are sensitive to the effects of natural radiation. This paper describes the test platforms developped to perform high altitude experiments devoted to obtain SEU error-rates of SRAMs operating at high altitude. Two experiments were developped using a Gbyte memory board. The first was installed in the payload of a balloon flying at about 30000 mts, the second one being runing at 3800 mts above sea level in the city of Cusco, Peru. Preliminary resulta are shown and discussed
Medições de nêutrons oriundos de radiação cósmica em Puno (Peru)
International audienceuma participação no projeto HARMLESS, Atividades de Pesquisa e Desenvolviment
Análisis comparativo con fines pedagógicos en el diseño de filtros supresores de banda angosta con T gemela y FDNR
Debido a la complejidad para introducir por primera vez la temática de los convertidores de imped... more Debido a la complejidad para introducir por primera vez la temática de los convertidores de impedancia en el ámbito universitario, específicamente los giradores (Circuito de Antoniou) y circuitos FDNR (Frequency Dependent Negative Resistance), se elabora una introducción didáctica, básica y detallada de los convertidores de impedancia, específicamente de los giradores y los circuitos FDNR usados en el curso de Electrónica II de la Universidad de la Costa.
RAR: Risk Aware Revocation Mechanism for Vehicular Networks
2012 Ieee 75th Vehicular Technology Conference, 2012
ABSTRACT Vehicular Ad Hoc Networks (VANETs) require some mechanism to authenticate messages, iden... more ABSTRACT Vehicular Ad Hoc Networks (VANETs) require some mechanism to authenticate messages, identify valid vehicles, and remove misbehaving ones. A Public Key Infrastructure (PKI) can provide this functionality using digital certificates. In PKI, key management and corresponding issuance and revocation of digital certificates is one of the key issues that have to be solved. The IEEE 1609.2 standard states that VANETs will rely on the use of certificate revocation lists (CRLs) to achieve revocation. In this paper, we analyze the problems of using CRLs in these type of networks. Moreover, we describe the Risk Aware Revocation (RAR) mechanism that improves the traditional use of CRLs. RAR takes advantage of the two distinct channel types in VANETs to increase the freshness of the revocation information. Moreover, RAR allows users to gauge the risk of operating in a VANET when using CRLs.
Analog Integrated Circuits and Signal Processing, 2014
A digital hardware architecture for a three-input one-output zero-order ANFIS
2012 IEEE 3rd Latin American Symposium on Circuits and Systems (LASCAS), 2012
A digital system architecture for a three-input one-output zero-order ANFIS (Adaptive Neuro-Fuzzy... more A digital system architecture for a three-input one-output zero-order ANFIS (Adaptive Neuro-Fuzzy Inference System) is presented. The proposed architecture takes into account that the training process is done off-line in the MATLAB environment. The system is implemented as a nonlinear-function generator for test purposes. Post-place and route simulation results obtained on a Xilinx Spartan-3 XC3S200 FPGA are presented. Its correct
Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster, UK Antonio Ferrari, Univ. Aveiro, PT
Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster,... more Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster, UK Antonio Ferrari, Univ. Aveiro, PT Antonio Garcia Rozo, Uniandes, CO Arlindo Oliveira, IST, PT Armando Gomes, Motorola, BR Bernard Courtois, TIMA, FR Carlos Llanos QuinteiroIESB, BR Carlos Montoro, UFSC, BR Carlos Silva-Cardenas, PUC, PE Christian Piguet, CSEM,CH David Déharbe, UFRN, BR Dominique Borrione, TIMA, FR Edgar Sanchez-Sinencio, Texas A&M Univ.,USA Edmund Clarke, CMU/SCS, USA Edna Barros, ...
Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster, UK Antonio Ferrari, Univ. Aveiro, PT
Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster,... more Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster, UK Antonio Ferrari, Univ. Aveiro, PT Antonio Garcia Rozo, Uniandes, CO Arlindo Oliveira, IST, PT Armando Gomes, Motorola, BR Bernard Courtois, TIMA, FR Carlos Llanos QuinteiroIESB, BR Carlos Montoro, UFSC, BR Carlos Silva-Cardenas, PUC, PE Christian Piguet, CSEM,CH David Déharbe, UFRN, BR Dominique Borrione, TIMA, FR Edgar Sanchez-Sinencio, Texas A&M Univ.,USA Edmund Clarke, CMU/SCS, USA Edna Barros, ...
Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster, UK Antonio Ferrari, Univ. Aveiro, PT
Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster,... more Adoracion Rueda, IMSE-CNM, ES Alex Orailoglu, UC San Diego, USA Andrew Richardson, CME-Lancaster, UK Antonio Ferrari, Univ. Aveiro, PT Antonio Garcia Rozo, Uniandes, CO Arlindo Oliveira, IST, PT Armando Gomes, Motorola, BR Bernard Courtois, TIMA, FR Carlos Llanos QuinteiroIESB, BR Carlos Montoro, UFSC, BR Carlos Silva-Cardenas, PUC, PE Christian Piguet, CSEM,CH David Déharbe, UFRN, BR Dominique Borrione, TIMA, FR Edgar Sanchez-Sinencio, Texas A&M Univ.,USA Edmund Clarke, CMU/SCS, USA Edna Barros, ...
Debido a la complejidad para introducir por primera vez la temática de los convertidores de imped... more Debido a la complejidad para introducir por primera vez la temática de los convertidores de impedancia en el ámbito universitario, específicamente los giradores (Circuito de Antoniou) y circuitos FDNR (Frequency Dependent Negative Resistance), se elabora una introducción didáctica, básica y detallada de los convertidores de impedancia, específicamente de los giradores y los circuitos FDNR usados en el curso de
Electrónica II de la Universidad de la Costa.
This work proposes an FPGA implementation of software radio architecture for a FM modulator. The ... more This work proposes an FPGA implementation of software radio architecture for a FM modulator. The architecture is based on the Altera Nios II ® soft-processor. The frequency synthesis is performed by the digital direct synthesizer. It's a real time system that uses an audio codec WM8731 [1] to acquire the audio signal. This signal is adapted to be a parameter of the DDS. Then the digital signal produced by the DDS is transformed to the analog domain using a 10-bit video DAC ADV7123 [2].
RAR: Risk Aware Revocation Mechanism for Vehicular Networks
2012 IEEE 75th Vehicular Technology Conference (VTC Spring), 2012
ABSTRACT Vehicular Ad Hoc Networks (VANETs) require some mechanism to authenticate messages, iden... more ABSTRACT Vehicular Ad Hoc Networks (VANETs) require some mechanism to authenticate messages, identify valid vehicles, and remove misbehaving ones. A Public Key Infrastructure (PKI) can provide this functionality using digital certificates. In PKI, key management and corresponding issuance and revocation of digital certificates is one of the key issues that have to be solved. The IEEE 1609.2 standard states that VANETs will rely on the use of certificate revocation lists (CRLs) to achieve revocation. In this paper, we analyze the problems of using CRLs in these type of networks. Moreover, we describe the Risk Aware Revocation (RAR) mechanism that improves the traditional use of CRLs. RAR takes advantage of the two distinct channel types in VANETs to increase the freshness of the revocation information. Moreover, RAR allows users to gauge the risk of operating in a VANET when using CRLs.
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Papers by C. Silva-cardenas
Electrónica II de la Universidad de la Costa.