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Brussels, Belgium

de la Piedra A.,Vrije Universiteit Brussel | Braeken A.,Erasmushogeschool Brussel | Touhafi A.,Vrije Universiteit Brussel
Sensors (Switzerland) | Year: 2012

In this manuscript, we present a survey of designs and implementations of research sensor nodes that rely on FPGAs, either based upon standalone platforms or as a combination of microcontroller and FPGA. Several current challenges in sensor networks are distinguished and linked to the features of modern FPGAs. As it turns out, low-power optimized FPGAs are able to enhance the computation of several types of algorithms in terms of speed and power consumption in comparison to microcontrollers of commercial sensor nodes. We show that architectures based on the combination of microcontrollers and FPGA can play a key role in the future of sensor networks, in fields where processing capabilities such as strong cryptography, self-testing and data compression, among others, are paramount. © 2012 by the authors; licensee MDPI, Basel, Switzerland. Source


De La Piedra A.,Vrije Universiteit Brussel | Touhafi A.,Vrije Universiteit Brussel | Braeken A.,Erasmushogeschool Brussel
2013 23rd International Conference on Field Programmable Logic and Applications, FPL 2013 - Proceedings | Year: 2013

In this manuscript, we have explored how the use of DSP blocks in the implementation of two authenticated-encryption modes of AES can optimize the PAR figures. Our results reflect that a 20.98 % reduction in slice utilization can be achieved at a throughput higher than 25 Mbps (12 MHz) in the Artix-7 XC7A200TL FPGA. © 2013 IEEE. Source


De la Piedra A.,Vrije Universiteit Brussel | Braeken A.,Erasmushogeschool Brussel | Touhafi A.,Vrije Universiteit Brussel
Sensors (Switzerland) | Year: 2013

Typically, commercial sensor nodes are equipped with MCUsclocked at a low-frequency (i.e., within the 4-12 MHz range). Consequently, executing cryptographic algorithms in those MCUs generally requires a huge amount of time. In this respect, the required energy consumption can be higher than using a separate accelerator based on a Field-programmable Gate Array (FPGA) that is switched on when needed. In this manuscript, we present the design of a cryptographic accelerator suitable for an FPGA-based sensor node and compliant with the IEEE802.15.4 standard. All the embedded resources of the target platform (Xilinx Artix-7) have been maximized in order to provide a cost-effective solution. Moreover, we have added key negotiation capabilities to the IEEE 802.15.4 security suite based on Elliptic Curve Cryptography (ECC). Our results suggest that tailored accelerators based on FPGA can behave better in terms of energy than contemporary software solutions for motes, such as the TinyECC and NanoECC libraries. In this regard, a point multiplication (PM) can be performed between 8.58- and 15.4-times faster, 3.40- to 23.59-times faster (Elliptic Curve Diffie-Hellman, ECDH) and between 5.45- and 34.26-times faster (Elliptic Curve Integrated Encryption Scheme, ECIES). Moreover, the energy consumption was also improved with a factor of 8.96 (PM). © 2013 by the authors; licensee MDPI, Basel, Switzerland. Source


Devriendt C.,Erasmushogeschool Brussel | De Troyer T.,Erasmushogeschool Brussel | De Sitter G.,Vrije Universiteit Brussel | Guillaume P.,Erasmushogeschool Brussel
Shock and Vibration | Year: 2012

During the recent years several new tools have been introduced by the Vrije Universiteit Brussel in the field of Operational Modal Analysis (OMA) such as the transmissibility based approach and the the frequency-domain OMAX concept. One advantage of the transmissibility based approach is that the ambient forces may be coloured (non-white), if they are fully correlated. The main advantage of the OMAX concept is the fact that it combines the advantages of Operational and Experimental Modal Analysis: ambient (unknown) forces as well as artificial (known) forces are processed simultaneously resulting in improved modal parameters. In this paper, the transmissibility based output-only approach is combined with the input/output OMAX concept. This results in a new methodology in the field of operational modal analysis allowing the estimation of (scaled) modal parameters in the presence of arbitrary ambient (unknown) forces and artificial (known) forces. © 2012-IOS Press and the authors. All rights reserved. Source


Grant
Agency: Cordis | Branch: FP7 | Program: CP | Phase: ICT-2009.6.1 | Award Amount: 9.24M | Year: 2010

For E.V.s, the development of an interactive electric energy ICT & Service interface between the vehicle and its electricity infrastructure is of utmost importance, next to creating effective business models.\n\nThe rationale of this project is to contribute significantly to neutralize the drivers range anxiety and encourage the customers to embark the fully electric road transport.\nTherefore the objective of ELVIRE is to develop an on-board electric energy communication & service platform for realistic use-cases including the relevant external communication and services. For this purpose the following actions will be taken:\n\tselect representative use-cases according to realistic scenarios and business-models\n\tidentify & develop those off-board ICT & services needed to comply with the use cases\n\tdevelop Prototypes for the on-board Communication and E-energy service unit\n\tverify all integrated sub-systems on prototype level and demonstrate the proof of concept.\n\nGreat emphasis is placed on the openness of the Electricity-service platform granting access to multiple players maintaining the customers choice.\n\nELVIRE is structured into 5 work packages, with:\n\tWP 1000\tcovering the project administration, legal aspects and dissemination and the inclusion of complementary RTD\n\tWP 2000\tdefines relevant mission data for the use case in consideration of technical and commercial aspects\n\tWP 3000\taddresses the external E-Service provision and the necessary E-IC instruments\n\tWP 4000 \tdevelops the e-communication device and the OEM-neutral universal on-board E-communication and service platform\n\tWP 5000 conducts integration and usability tests and the overall system validation.\n\nELVIRE will become crucial to future electric road transport by closing the gap between vehicle technology and the off-board E-ICT and service environment. ELVIRE will have strong impact by strengthening competitiveness, energy efficiency and reduce emissions and improve by promoting electrification.

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