Time filter

Source Type

Agency: European Commission | Branch: FP7 | Program: JTI-CP-ARTEMIS | Phase: SP1-JTI-ARTEMIS-2011-5;SP1-JTI-ARTEMIS-2011-1 | Award Amount: 24.44M | Year: 2012

According to a recent forecast published by ABI Research , a fast growth of the market of Advanced Driving Assistance Systems (ADAS) is foreseen in the next five years. For example, in 2016 the overall annual market for Lane Departure Warning systems is expected to reach 22 million units/year (corresponding to 14,3 billion dollars). This market growth will be possible only through the reduction of costs of components as well as the seamless integration of different functions in the same architecture. Since the market will include also low volume vehicles, there will be also a strong need to reduce development costs. Electric vehicles will be an additional catalyst for the ADAS market. The absence of engine noise requires the introduction of new means to protect vulnerable road users from these vehicles. On the other hand, electric vehicles can easily support (semi)automatic functions (such as parking manoeuvres and Stop&Go). To manage the expected increase of function complexity together with the required reduction of costs (fixed and variable) DESERVE will design and build an ARTEMIS Tool Platform based on the standardisation of the interfaces, software (SW) reuse, development of common non-competitive SW modules, and easy and safety-compliant integration of standardised hardware (HW) or SW from different suppliers. With innovative design space exploration (DSE) methods system design costs can be reduced by more than 15%. Hence, DESERVE will build an innovation ecosystem for European leadership in ADAS embedded systems, based on the automotive R&D actors, with possible applications in other industrial domains. Since the purpose of ADAS functions is also to support the driver, an advanced human-centred design strategy will be integrated in the Tool Platform. Therefore, the developed applications will provide natural and friendly support to the driver, with proper levels of overall functional safety also during complex or emergency manoeuvres. - - - Version approved by the JU on 14/07/2015

Dupuis Y.,CNRS Research Institute for Embedded Electronic Systems
IEEE transactions on image processing : a publication of the IEEE Signal Processing Society | Year: 2013

Bio-inspired and non-conventional vision systems are highly researched topics. Among them, omnidirectional vision systems have demonstrated their ability to significantly improve the geometrical interpretation of scenes. However, few researchers have investigated how to perform object detection with such systems. The existing approaches require a geometrical transformation prior to the interpretation of the picture. In this paper, we investigate what must be taken into account and how to process omnidirectional images provided by the sensor. We focus our research on face detection and highlight the fact that particular attention should be paid to the descriptors in order to successfully perform face detection on omnidirectional images. We demonstrate that this choice is critical to obtaining high detection rates. Our results imply that the adaptation of existing object-detection frameworks, designed for perspective images, should be focused on the choice of appropriate image descriptors in the design of the object-detection pipeline.

Ravelo B.,CNRS Research Institute for Embedded Electronic Systems
Electronics Letters | Year: 2011

This presented report deals with the synthesis of baseband negative group delay (NGD) RF circuits. A theoretical approach based on the S-parameter analysis is presented. The NGD circuit synthesis formulae according to the desired gain value, NGD level and bandwidth are established. To validate the theoretical approach, a two-stage NGD device employing LNAs was investigated. Baseband NGD with minimal value below -1ns with 400MHz frequency bandwidth was found. The synthesised circuit presents a gain higher than 5dB. To highlight the functionality of the NGD effect, time-domain analysis was performed. The NGD circuit allows the reduction of signal pure delays caused by telecom devices and is useful for the correction of interleaved symbols in RF/digital numerical systems. © 2011 The Institution of Engineering and Technology.

Raveloa B.,CNRS Research Institute for Embedded Electronic Systems
EPJ Applied Physics | Year: 2012

A relevant modeling-method of distributed interconnect line for the high-speed signal integrity (SI) application is introduced in this paper. By using the microwave and transmission line (TL) theory, the interconnect lines are assumed as its distributed RLC-model. Then, based on the transfer matrix analysis, the second-order global transfer function of the interconnect network comprised of the TL driven by voltage source including its internal resistance and the impedance load is expressed. Thus, mathematical analysis enabling the physical SI-parameters' extraction was established by using the transient response of the loaded line. To verify the relevance of the developed model, RC-and RLC-lines excited by square-wavepulse with 10-Gbits/s-rate were investigated. So, comparisons with SPICE-computations were performed. As results, transient responses perfectly well correlated to the reference SPICE-models were evidenced. As application of the introduced model, evaluations of rise-/fall-times, propagation delays, signal attenuations and even the settling times were realized for different values of TL-parameters. Compared to other methods, the computation execution time and data memory consumed by the program implementing the proposed delay modeling-method algorithm are much better. © 2012 EDP Sciences.

Ravelo B.,CNRS Research Institute for Embedded Electronic Systems
Progress In Electromagnetics Research C | Year: 2011

This paper demonstrates the exhibition of pulse compres- sion from an electronic circuit with negative group delay (NGD). This circuit consists of a field effect transistor (FET) cascaded with shunt RLC network. Theoretic and experimental investigations have proved that, at its resonance frequency, the group delay of this circuit is al- ways negative. The present study shows that around this resonance, it presents a gain form enabling to generate pulse compression. To validate this concept, as proof-of-principle, devices with one- and two- stages FET were implemented and tested. Measurements of the one- stage test device evidenced an NGD of about ¡2:5 ns and simulta- neously with 2 dB amplification operating at 622MHz resonance fre- quency. In the frequency domain, in the case of a Gaussian input pulse with 40MHz frequency standard deviation, this resulted in 125% ex- pansion of pulse width compared to the input one. In time domain, simulations showed that the compression was about 80% in the case of an input Gaussian pulse with 4 ns standard deviation. With the other prototype comprised of two-stage NGD cell, the use of a sine carrier of about 1.03 GHz allowed to achieve 87% pulse width compression.

Ravelo B.,CNRS Research Institute for Embedded Electronic Systems
AEU - International Journal of Electronics and Communications | Year: 2014

This paper is aimed to the investigation on innovative distributed negative group delay (DNGD) circuits for RF communication. Thanks to the analogy between the lumped and distributed circuits, NGD circuit topologies were identified. By using the S-parameter theory, analysis and synthesis methods of these topologies are proposed. The DNGD circuits developed are mainly comprised of a transistor combined with a series resistance ended by a stub. Then, synthesis relations enabling to determine the NGD circuit parameters from the desired NGD and gain values are established. As application, an active phase shifter (PS) operating independently with the frequency based on the cascade of PGD and NGD devices was synthesized. First, an NGD PS with transmission phase of (135 ± 5) around 2.56 GHz over the bandwidth of about 1.02 GHz was obtained. Then, a two-stage DNGD PS exhibiting 90 with ±10 flatness from 4.1 GHz to 6.8 GHz was designed. The DNGD circuit presented can be used in various telecommunication areas notably for correcting RF/numerical signal delays in the RF-microwave analogue-digital devices. © 2013 Elsevier GmbH.

Ravelo B.,CNRS Research Institute for Embedded Electronic Systems
Electromagnetics | Year: 2011

In this article, a fundamental analytical approach and experimental verification of a radio frequency active circuit capable of exhibiting negative group delay at microwave wavelengths are presented. By using the S-parameter theory, basic properties and characteristics of the negative group delay circuit under study are established. To highlight the functionality principle of this innovative circuit, time-domain investigations based on ultra-wide-band pulse signal tests are performed. Then, the mechanism of propagating output signal envelopes in time advance compared to the input is demonstrated. To validate this concept, a prototype of a negative group delay device was designed, fabricated, and tested. Experimental results in good agreement with theory and simulation were obtained. In the frequency domain, a negative group delay of about -2.5 ns with amplification of 2 dB was measured at around 622 MHz. Due to this negative group delay effect, envelope advance of about -1.5 ns was observed by considering a pulse signal with a half-height full-width of 10 ns, which modulates a sine carrier with a frequency of 622 MHz. The negative group delay topology presented is potentially useful for the compensation of radio frequency/microwave signal delays. © 2011 Copyright Taylor and Francis Group, LLC.

Ravelo B.,CNRS Research Institute for Embedded Electronic Systems
EPJ Applied Physics | Year: 2011

This paper introduces theoretic and experimental analyses of short-duration pulse propagation through a negative group delay (NGD) circuit. The basic analysis method of this electronic circuit operating in baseband and microwave frequencies is investigated. Then, its electrical fundamental characteristics vis-à-vis transient signals are developed. To validate the theoretic concept, planar hybrid devices with one- and two-stage NGD cells were designed, simulated, fabricated and tested. Transient analyses with ultra-wide band (UWB) pulse signals with different widths are realized. Then, experimental results in good agreement with the theoretical predictions were observed. Consequently, group delay going down under -2.5 ns is evidenced in baseband frequency up to 63 MHz with one-stage NGD cell. In time-domain, a Gaussian pulse in advance of about t0 = -1.5 ns or 20% of its half-height time-width was measured. This corresponds to a negative group velocity of about vg = L/t 0 = -0.13c (L is the physical length of the tested device and c is light speed in the vacuum). More significant NGD value over 100-MHz bandwidth is stated with two-stage NGD cells. This results in a Gaussian pulse peak advance of about -5 ns (raising a group velocity of about vg = -0.12c) or 31% of its half-height time-width. Finally, some potential applications based on the NGD function are discussed. © EDP Sciences, 2011.

Ravelo B.,CNRS Research Institute for Embedded Electronic Systems
International Journal of Circuit Theory and Applications | Year: 2014

This paper deals with the similitude between the behaviours of linear filter gain and negative group delay (NGD) function. The transposition method of low-pass/high-pass, low-pass/band-pass and low-pass/band-stop NGD circuits is established. To the best of the author knowledge, it acts as the first paper devoted on the NGD function generalized theory. The introduced transform relationships simplify the synthesis of any NGD circuits from simple elementary low-pass NGD topologies. Families of innovative NGD topologies are identified. To verify the relevance of the concept proposed, frequency- and time-domain analysis results from realistic proofs of concept demonstrating the feasibility of developed NGD transforms were performed. Thanks to the NGD phenomenon, the possibility of the ultra-wideband pulse signals propagating in time-advance is verified. Finally, potential applications of NGD circuits are discussed. Copyright © 2013 John Wiley & Sons, Ltd.

Agency: European Commission | Branch: FP7 | Program: BSG-SME | Phase: SME-2012-1 | Award Amount: 1.76M | Year: 2012

The CareStore project wishes to create a shared and open marketplace, similar to Apples App Store, for easier deployment of applications and device drivers within the healthcare domain. We wish to extend and adapt existing open source assisted living platforms for nursing homes to integrate the CareStore. These will be investigated and extended with a reliable and secure recognition and identification hardware and software platform to work in a Pan-European context. The envisaged solution is considerably more flexible, cost-competitive and efficient than current state-of-the-art solutions. The CareStore will allow private and public organisations and institutions to select independent vendors and combine hard- and software from several providers. The solution allows nursing homes (via their public or private provider) to establish an independent CareStore through the general setup of the already existing Open-Care based Sekoia platform. Today, a large number of assisted living technologies coexist without a common language between them. They have different user interfaces, communication infrastructures and maintenance plans, which limit the inclusion of efficiency-enhancing solutions in the homecare and elderly sector. The deployment of applications and devices are overly complex, and cannot be handled by healthcare staff or citizens themselves, but require support from technical personnel, thus increasing cost and reducing feasibility of implementing new technology solutions. By developing an open-source platform and CareStore, based on standardised user-interface and recognition technology, where all technologies and devices can be seamlessly installed and connected, we would most likely increase the incentive to implement assisted living technologies in the homecare and elderly sector and open up a significant market potential for this SME consortium, targeting a potential market of 11,5 billion and a total increased consortium turnover of 41 million.

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