nabil houdali

Time-domain PLL modeling and RJ/DJ jitter decomposition

2016 IEEE International Symposium on Circuits and Systems (ISCAS), 2016

Bit rates of high speed serial links (USB, SATA, PCI-express, etc.) have reached the multi-gigabi... more Bit rates of high speed serial links (USB, SATA, PCI-express, etc.) have reached the multi-gigabits per second, and continue to increase. Two of the major electrical parameters used to characterize SerDes Integrated Circuit performance are the transmitted jitter at a given bit error rate (BER) and the receiver capacity to track jitter at a given BER. Modeling the phase noise of the different SerDes components, extracting the time jitter and decomposing it, would help designers to achieve desired Figure of Merit (FoM) for future SerDes versions. The phase locked loop (PLL) is one of the contributors of clock random and periodic jitter inside the system [1]. This paper presents a method for modeling the PLL with phase noise injection and estimating the time domain jitter. A time domain model including PLL loop nonlinearities is created in order to estimate jitter. The Standard Organizations specify random and deterministic jitter budgets. In order to decompose the PLL output jitter, a new technique for jitter analysis and decomposition is proposed. Modeling simulation results correlate well with measurements and this technique will help designers properly identify and quantify the sources of deterministic jitter and their impact on the SerDes system.

Article RF Infrastructure Cooperative System for in Lane Vehicle Localization

This paper presents a sensor which can be included in an Advanced Driver Assistance System (ADAS)... more This paper presents a sensor which can be included in an Advanced Driver Assistance System (ADAS) that is compliant with the Vehicle to Infrastructure communication standard (V2I). This system allows estimation of the vehicle lateral position in real time by ensuring cooperation between an on-board vehicle system and passive transponders integrated in the lateral white strips of the road. Based on an optimization method, the lateral position vehicle is provided with a distance error less than 3 cm. In this paper, experimental results are presented in order to evaluate the robustness of the proposed system in a realistic environment. Three scenarios are considered to take into account the bitumen properties, the presence of parasitic reflectors in different positions around the system and the interaction between transponders.

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Communication Véhicule-infrastructure pour la prévention des sorties de route

ABSTRACT Un système d&#39;aide à la conduite, reposant sur la communication entre le véhicule... more ABSTRACT Un système d&#39;aide à la conduite, reposant sur la communication entre le véhicule et l&#39;infrastructure routière, est présenté dans cet article. Ce système est composé de deux élément, un dispositif embarqué dans le véhicule et des transpondeurs intégrés dans les bandes blanches latérales de la route. En réception, le signal qui résulte de la réflexion sur le transpondeur est traité pour estimer la position latérale du véhicule. La distance entre le véhicule et l&#39;infrastructure est estimée avec une précision de l’ordre de ± 2 cm.

Conception d'un système électromagnétique coopératif estimant la position latérale d'un véhicule sur sa voie pour une application d'aide à la conduite

Ce travail porte sur l'etude et la validation du principe d'un systeme d'aide a la co... more Ce travail porte sur l'etude et la validation du principe d'un systeme d'aide a la conduite dont le but est de detecter en temps reel la position laterale du vehicule sur la route, afin d'alerter son conducteur d'un debut de perte de controle. L'approche decrite consiste a utiliser un systeme de communication electromagnetique fonctionnant en bande UHF et des transpondeurs passifs integres dans les bandes de signalisation laterales. Le systeme de communication embarque dans le vehicule est en interaction avec les transpondeurs. Ces elements sont facilement integrables sur la chaussee et leurs couts de production et d'installation sont raisonnables. Chaque transpondeur contient une antenne demi-onde pour recevoir et retransmettre les ondes electromagnetiques, ainsi qu'un resonateur a onde acoustique de surface ayant un coefficient de qualite eleve a sa frequence de resonance. Le systeme embarque comprend des antennes d'emission et de reception ains...

Aid System Has Driving

A driving assistance system for providing, to a vehicle traveling on an infrastructure, informati... more A driving assistance system for providing, to a vehicle traveling on an infrastructure, information, comprising: electromagnetic wave emitting means embedded in said vehicle comprising at least one transmitting antenna arranged to transmit waves electromagnetic variable frequency to reflectors installed in the infrastructure, receiving means for electromagnetic waves embedded in said vehicle comprising at least one receiving antenna, arranged to receive electromagnetic waves reflected by said reflector, and processing means configured for extracting electromagnetic waves reflected by said reflector and captured by the receiving means, data representative of the distance between said reflector and the vehicle.

V2I electromagnetic system for lateral position estimation of a vehicle

A vehicle to infrastructure (V2I) electromagnetic system is studied to estimate the lateral posit... more A vehicle to infrastructure (V2I) electromagnetic system is studied to estimate the lateral position of a vehicle in its lane. This system can be include in an advanced driving assistance system (ADAS) in order to provide the vehicle lateral positions to warn the driver in case of an involuntary road lane departure or to drive the car in case of autonomous driving. The developed system consists of passive electromagnetic transponders embedded in the lane markings, each one contains two surface acoustic wave (SAW) resonators that have two different center frequencies, and a hyperfrequency transceiver embedded in the lateral sides of the vehicle. The system operates in the ultrahigh frequency (UHF) band. The phase difference of arrival (PDoA) method for distance measurement is used to estimate the absolute lateral distance between the vehicle and the lane markings. A method is developed to recover the useful phases from the global response of the system using its frequency response, a...

Système d'aide à la conduite par la coopération mobile infrastructure

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Time-domain PLL modeling and RJ/DJ jitter decomposition

Bit rates of high speed serial links (USB, SATA, PCI-express, etc.) have reached the multi-gigabi... more Bit rates of high speed serial links (USB, SATA, PCI-express, etc.) have reached the multi-gigabits per second, and continue to increase. Two of the major electrical parameters used to characterize SerDes Integrated Circuit performance are the transmitted jitter at a given bit error rate (BER) and the receiver capacity to track jitter at a given BER. Modeling the phase noise of the different SerDes components, extracting the time jitter and decomposing it, would help designers to achieve desired Figure of Merit (FoM) for future SerDes versions. The phase locked loop (PLL) is one of the contributors of clock random and periodic jitter inside the system [1]. This paper presents a method for modeling the PLL with phase noise injection and estimating the time domain jitter. A time domain model including PLL loop nonlinearities is created in order to estimate jitter. The Standard Organizations specify random and deterministic jitter budgets. In order to decompose the PLL output jitter, a new technique for jitter analysis and decomposition is proposed. Modeling simulation results correlate well with measurements and this technique will help designers properly identify and quantify the sources of deterministic jitter and their impact on the SerDes system

RF Infrastructure Cooperative System for in Lane Vehicle Localization

by nabil houdali and Geron Emmanuel

Electronics, 2014

This paper presents a sensor which can be included in an Advanced Driver Assistance System (ADAS)... more This paper presents a sensor which can be included in an Advanced Driver Assistance System (ADAS) that is compliant with the Vehicle to Infrastructure communication standard (V2I). This system allows estimation of the vehicle lateral position in real time by ensuring cooperation between an on-board vehicle system and passive transponders integrated in the lateral white strips of the road. Based on an optimization method, the lateral position vehicle is provided with a distance error less than 3 cm. In this paper, experimental results are presented in order to evaluate the robustness of the proposed system in a realistic environment. Three scenarios are considered to take into account the bitumen properties, the presence of parasitic reflectors in different positions around the system and the interaction between transponders.

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