DOCSLIB.ORG

Modelado Y Validación De Un Sistema Digital De Comunicaciones De Gran Ancho De Banda De Aplicación En Vehículos De Transporte

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Modelado Y Validación De Un Sistema Digital De Comunicaciones De Gran Ancho De Banda De Aplicación En Vehículos De Transporte UNIVERSIDAD PONTIFICIA COMILLAS DE MADRID ESCUELA TÉCNICA SUPERIOR DE INGENIERÍA (ICAI) (Instituto de Investigación Tecnológica) Modelado y validación de un sistema digital de comunicaciones de gran ancho de banda de aplicación en vehículos de transporte Tesis para la obtención del grado de Doctor Director: Prof. Dr. D. Sadot Alexandres Fernández Autor: Ing. D. Carlos Rodríguez-Morcillo García Madrid 2007 CONSTANCIA REGISTRAL DEL TRIBUNAL DEL ACTO DE LA DEFENSA DE TESIS DOCTORAL TÍTULO: Modelado y validación de un sistema digital de comunicaciones de gran ancho de banda de aplicación en vehículos de transporte AUTOR: D. Carlos Rodríguez-Morcillo García DIRECTOR: Dr. D. Sadot Alexandres Fernández TUTOR-PONENTE: -- DEPARTAMENTO: Instituto de Investigación Tecnológica FACULTAD O ESCUELA: Escuela Técnica Superior de Ingeniería (ICAI) Miembros del Tribunal Calificador: PRESIDENTE: Dr. D. Manuel Mazo Quintas Firma: ................................ VOCAL: Dr. D. José Luís Martín González Firma: ................................ VOCAL: Dr. D. César Sanz Álvaro Firma: ................................ VOCAL: Dr. D. Rafael Palacios Hielscher Firma: ................................ SECRETARIO: Dr. D. José Daniel Muñoz Frías Firma: ................................ Fecha de lectura: 19 de septiembre de 2007 Calificación: ……………………………………………………. A María, a mis padres y a mi hermano. A la memoria de Quique. Resumen En esta Tesis se propone un sistema digital de comunicaciones que per- mite transmitir una gran cantidad de información entre los equipos embar- cados en un vehículo de transporte, aumentando así la capacidad de trans- misión de los sistemas instalados actualmente. Además, el sistema propues- to es capaz de funcionar compartiendo el mismo medio físico que los siste- mas actuales, para minimizar el coste económico y de recursos que supone la instalación de un nuevo sistema en un vehículo ya fabricado. Para llevar a cabo el desarrollo del sistema digital propuesto se han rea- lizado un estudio teórico y un análisis experimental en varias fases. En pri- mer lugar, se ha obtenido el modelo electromagnético de una línea de transmisión de un vehículo de transporte, concretamente de un tren. Con ello se ha analizado la viabilidad de la Tesis. En segundo lugar, se ha desarrollado el sistema de comunicaciones pro- puesto basando su funcionamiento en la técnica Orthogonal Frequency Divi- sion Multiplexing (OFDM), por su capacidad de transmitir un gran caudal de información con poco ancho de banda. Esta técnica se utiliza en sistemas digitales como WLAN, DSL, PLC y DVB-T. En esta parte de la investigación se han definido todos los parámetros necesarios para el funcionamiento del sistema y se ha configurado con unos valores adecuados. A continuación, se ha realizado un simulador software del sistema desa- rrollado anteriormente, con el que se puede analizar el funcionamiento del mismo para obtener la configuración óptima. En este simulador se ha tenido en cuenta tanto el modelo de la línea de transmisión analizada en la prime- ra parte de la Tesis, como la posibilidad de funcionar simultáneamente con otros sistemas. Posteriormente, se ha construido una plataforma de pruebas basada en FPGA con la que se ha verificado el correcto funcionamiento del sistema di- gital desarrollado y con el que se ha validado el simulador anterior. Esto ha ii Resumen permitido transmitir, a lo largo de 30 metros de cable, un caudal de datos de 8 Mbps en un ancho de banda de 3 MHz. Por último, se ha realizado un banco de pruebas en laboratorio con el que se ha comparado el funcionamiento simultáneo del sistema desarrollado en la Tesis con otro sistema empleado actualmente en vehículos ferroviarios, concretamente con el estándar IEC 61375-1 relativo al Train Communica- tion Network (TCN). Esta prueba ha validado el trabajo realizado en la Te- sis y ha demostrado que, con el sistema desarrollado, se puede aumentar el caudal de información de un sistema de comunicaciones actualmente insta- lado en un vehículo de transporte, con un mínimo coste en equipos e instala- ción. Abstract This Thesis proposes a digital communications system that enables the transmission of huge amount of information, between equipment on board of a transport vehicle. This increases the transmission capacity of control and supervision systems currently installed. Moreover, the system is able to work simultaneously with other on-board systems sharing the same physi- cal medium. Therefore it reduces the economic and resources costs of a new system installation in the vehicle significantly. To carry out the development of the digital system proposed, the research work begins by studying the electromagnetic model of a transmission line in a railway vehicle. Such analysis has confirmed the viability of this Thesis. In a second stage, the research work was focused on the development of a communication system based on Orthogonal Frequency Division Multiplex- ing (OFDM) technique. That technique was chosen due to its bit rate capac- ity and bandwidth optimization. OFDM is used in other communication sys- tem such as WLAN, DSL, PLC or DVB-T. In this research stage we defined all configuration parameters according to transmission line model. In the third research stage, a software simulation tool of the developed system has been created. This simulator analyzes different vehicle configu- rations and calculates optimum parameters of the system by using the line transmission models obtained at the first stage. Besides, the simulator en- ables the study of the performance while sharing the same transmission channel for different services. A test platform, based on a FPGA technology, has been developed to vali- date the communication system and the simulator. This prototype is able to transmit 8 Mbps throughout using a 30 meters long cable in a 3 MHz band- width. Finally, a test bench has been developed in the laboratory. It was used to compare the performance of the developed system with another system cur- iv Abstract rently used in railway vehicles, specifically with the IEC 61375-1 standard for Train Communication Network (TCN). Both systems shared the trans- mission line. This final study validated the research work carried out in the Thesis and demonstrated that the bit rate in a transport vehicle can be in- creased with reduced costs and minimum installation problems. Agradecimientos En primer lugar quiero dar las gracias a mis padres y a mi hermano por el apoyo, la ayuda y el esfuerzo prestados a lo largo de toda mi vida. Sin ellos, el sueño que culmina con esta memoria de Tesis, no hubiese sido posi- ble. Muchas gracias. En segundo lugar, y por ello no menos importante que los anteriores, quiero agradecer a mi mujer, María, el apoyo diario y la ayuda prestada a lo largo de estos arduos años de trabajo. Y especialmente por el sacrificio que supone vivir y convivir con un doctorando. Ahora ha llegado el momento de recuperar todas esas sesiones de cine que no hemos podido disfrutar antes. Muchas gracias. En tercer lugar, a mi director de tesis, Sadot. No tengo palabras para agradecerle la confianza depositada en mí desde que me dirigiese el proyecto fin de carrera hace siete años. Por estar ahí cuando, desesperado, le buscaba porque no encontraba el camino a seguir y él, pacientemente, me reconducía; en definitiva, por esas largas conversaciones de tecnologías, comunicaciones y demás que hemos compartido en su despacho. Espero y deseo que el com- pañerismo y la amistad fraguada durante todos estos años perduren por siempre. Muchas gracias. En cuarto lugar, quiero dar las gracias a Dani, amigo y compañero, por la disposición que ha tenido siempre conmigo para ayudarme en todo lo posible y por los ánimos que me ha brindado a lo largo de estos años. Espero poder seguir trabajando con él y manteniendo esta amistad durante muchos años. Muchas gracias. En quinto lugar quiero recordar y agradecer a los profesores de la Uni- versidad, Begoña Vitoriano, Santiago Cano, Juan Luís Zamora, José Anto- nio Rodríguez Mondéjar y José Luís Rodríguez Marrero, el haber compartido conmigo sus conocimientos, haciéndome recordar “esas cosas tan raras que se ven durante la carrera y que nunca sirven para nada…”. Verdaderamente llegan a hacer falta algún día. Gracias por el interés prestado y gracias por vi Agradecimientos vuestro valiosísimo tiempo. No me quiero olvidar de José María Bautista ni de Antonio Martín, que tantas placas, cables y componentes me han facili- tado durante todo este tiempo; ni de Antonio Muñoz por su comprensión a la hora de “liberarme” de las clases. Muchas gracias. También quiero agradecer a los integrantes del Instituto de Investigación Tecnológica de la Universidad, investigadores en formación, contratados, secretarias, administradores… la ayuda prestada durante tantos años de convivencia y trabajo, y en especial a Isabel Tamudo y a Pilar Barrado, por su inestimable ayuda, y a la dirección por confiar en mí y otorgarme la Beca de Investigación del Colegio Nacional de Ingenieros del I.C.A.I. Sin duda ha sido un balón de oxígeno para el desarrollo de esta Tesis. Muchas gracias. No quiero dejarme en el tintero a Ulrich Hammes, alumno Erasmus de Alemania, que en chanclas y manga corta en pleno invierno, me ayudó en la toma de contacto de OFDM con su proyecto fin de carrera. Muchas gracias. Me gustaría dar las gracias a Luis Turrillo, Miguel Socías, Roberto Ra- mírez y Jaime Trainor, de SEPSA, por el cable, equipos y trenes facilitados para poder realizar las medidas necesarias. A Reyes Díez, de
Load more

Recommended publications
  • ABSTRACT 1 INTRODUCTION 1.1 Background 1.2 Data Link Requirements Overview
    HIGH-SPEED, LOW-POWER, EXCELLENT EMC: LVDS FOR ON-BOARD DATA HANDLING Dr SM Parkes Applied Computing, University of Dundee, Dundee, DD1 4HN, Scotland, UK Tel: 44 1382 345194, Fax: 44 1382 345509, Email: [email protected] ABSTRACT Since the endorsement of the IEEE 1355 by ESA and major companies involved in the space industry, the technology has The capabilities of remote-sensing instrumentation are been migrated successfully into radiation-tolerant, space- developing rapidly. As a consequence the data rates being qualifiable components. Daimler-Benz Aerospace and TEMIC handled on-board spacecraft are increasing. have developed a component (SMCS) which provides three LVDS (Low Voltage Differential Signaling) provides a means IEEE 1355 compatible links and a processor interface (Ref. 4). of sending data along a twisted pair cable at high speed, with Demonstration systems have been and are being developed for low power and with excellent EMC performance. These both multi-DSP processing systems (Ref. 5) and for large features make LVDS ideal for satellite on-board data-handling capacity, solid-state data storage systems (Ref. 6). High level applications. protocols have been developed to support interprocessor communication (Ref. 7). Software support for the SMCS link This paper assesses the suitability of LVDS for space devices has been provided within the Eonic Virtuoso real-time applications as part of a data-handling system based on IEEE operating system for both the TSC21020 DSP processor and 1355 comparing it against other types of line driver/receiver. the ERC32 SPARC 32-bit processor (Ref. 8). It explains how LVDS can be used together with IEEE 1355 to form the basis for a powerful on-board data handling system, The Digital Interface Circuit Evaluation (DICE) study was which is capable of handling data from current and future, initiated by ESTEC to take stock of these developments, to high data-rate instruments.
    [Show full text]
  • Spacewire Handbook
    SpaceWire Handbook DRAFT - SVN version 45 - September 24, 2012 4Links Limited Suite E U 2 BletchleyPark Milton Keynes, MK3 6EB United Kingdom Copyright © 2012 4Links Limited. SpaceWire Handbook DRAFT - SVN version 45 - September 24, 2012 Foreword This Draft Handbook is 4Links Limited’sinitial contribution to the forthcoming ECSS SpaceWire Handbook. Change Log Date Version 2012/06/29 First draft issue 2012/09/24 Second draft issue Copyright © 2012 4Links Limited. 2 SpaceWire Handbook DRAFT - SVN version 45 - September 24, 2012 Table of Contents Title Page ......................... 1 Foreword . ........................ 2 Change Log ........................ 2 1. Introduction ....................... 6 1.1. Purpose ....................... 6 1.2. Scope ........................ 6 1.3. Acknowledgements . ................... 6 1.4. Document structure . ................... 7 2. Terms, definitions and abbreviations ............... 8 2.1. Terms and definitions from other documents ............ 8 2.2. Terms specific to the present handbook ............. 8 2.2.1. SpaceWire End-Point .................. 8 2.2.2. SpaceWire Node ................... 8 2.2.3. SpaceWire Unit ................... 8 2.3. Abbreviated terms .................... 8 3. References ........................ 9 4. Introduction to SpaceWire .................. 10 4.1. Background and History .................. 10 4.1.1. 1960 -AModular Computer ............... 10 4.1.2. 1980 -System on Chip, Serial Interfaces . ........... 11 4.1.3. Transputer serial links in space ............... 11 4.1.4. Modularity ..................... 12 4.1.5. 1990+ Transputer links to IEEE-1355 ............ 12 4.1.6. IEEE-1355 and early SpaceWire in Space ........... 13 4.2. The current SpaceWire Standard ................ 13 4.2.1. Data-Strobe encoding . ................. 14 4.2.2. Low-levelflow-control . ................ 15 4.2.3. Packets . ..................... 15 4.2.4. Packet Routing .................... 15 4.2.5.
    [Show full text]
  • The IEEE 1355 Standard: Developments, Performance and Application in High Energy Physics
    The IEEE 1355 Standard: Developments, Performance and Application in High Energy Physics Thesis submitted in accordance with the requirements of the University of Liverpool for the degree of Doctor of Philosophy by Stefan Haas December 1998 The IEEE 1355 Standard: Developments, Performance and Applications in High Energy Physics Stefan Haas The data acquisition systems of the next generation High Energy Physics experiments at the Large Hadron Collider (LHC) at CERN will rely on high-speed point-to-point links and switching networks for their higher level trigger and event building systems. This thesis pro- vides a detailed evaluation of the DS-Link and switch technology, which is based on the IEEE 1355 standard for Heterogeneous InterConnect (HIC). The DS-Link is a bidirectional point-to-point serial interconnect, operating at speeds up to 200 MBaud. The objective of this thesis was to study the performance of the IEEE 1355 link and switch technology and to dem- onstrate that switching networks using this technology would scale to meet the requirements of the High Energy Physics applications. The performance and reliability of the basic point-to-point interconnect technology over elec- trical and fibre optic media were examined. These studies were carried out while the IEEE 1355 standard was still being finalised and have therefore provided valuable input to the standards working group. In order to validate the fibre optic physical layer proposed for the IEEE 1355 standard, an implementation demonstrator of a DS-Link interface for fibre optics, employing a new line encoding scheme, has been designed and characterised. This interface allows the link length for DS-links to be extended, which is important in the HEP context, where the cable length from the detector to the electronics can be up to 200 meters.
    [Show full text]
  • Tools Help You Lose the HARDWARE EDA SOFTWARE SEEMS to BE the ONLY SILICON Blues ASSISTANCE THAT SOME
    coverstory By Brian Dipert, Technical Editor Tools help you lose the HARDWARE EDA SOFTWARE SEEMS TO BE THE ONLY SILICON blues ASSISTANCE THAT SOME PROGRAMMABLE-LOGIC COMPANIES WANT TO TALK ABOUT NOWADAYS. WHAT OTHER TOOLS ARE AVAILABLE TO SIMPLIFY YOUR TASK OF—AS THESE SUPPLIERS SEEM TO HAVE FORGOTTEN—DESIGNING HARDWARE? At a glance ..........................37 A tools-table teaser ..........38 For more information ......42 Photo courtesy Altera 36 edn | April 18, 2002 www.ednmag.com n the early days of semiconductors, digital-system design was almost completely Ia hardware-intensive-tools task. User-customizable-logic chips (with the exception of software-configurable microprocessors) just didn’t exist. Instead, you dealt with collections of transistors, subsequently followed by dis- er, covers only conditions that you explicitly describe crete-logic gates, and then by single-chip assemblages in your test-vector file.What about those “real-world” of multiple gates. You interconnected them on the sys- combinations of input signals and sequences of those tem board to construct a desired function, maybe with signals that you haven’t predicted? Clearly, relying only the assistance of a DeMorgan Law logic-transformation on simulation is insufficient; old-school debugging program, but more likely with nothing more glamorous techniques still have value. Throughout the four main than a No. 2 pencil and paper.And when, invariably, the stages of product development—definition, design, circuit’s function didn’t match what you expected, you prototyping, and production—plenty of other op- powered up your trusty oscilloscope and logic analyz- portunities for hardware help exist, too. er to track down what went wrong.
    [Show full text]
  • Ethernet for the ATLAS Second Level Trigger
    Ethernet for the ATLAS Second Level Trigger by Franklin Saka Royal Holloway College, Physics Department University of London 2001 Thesis submitted in accordance with the requirements of the University of London for the degree of Doctor of Philosophy Abstract In preparation for building the ATLAS second level trigger, various networks and protocols are being investigated. Advancement in Ethernet LAN technology has seen the speed increase from 10 Mbit/s to 100 Mbit/s and 1 Gigabit/s. There are organisations looking at taking Ethernet speeds even higher to 10 Gigabit/s. The price of 100 Mbit/s Ethernet has fallen rapidly since its introduction. Gigabit Ethernet prices are also following the same pattern as products are taken up by customers wishing to stay with the Ethernet technology but requiring higher speeds to run the latest applications. The price/performance/longevity and universality features of Ethernet has made it an interesting technology for the ATLAS second level trigger network. The aim of this work is to assess the technology in the context of the ATLAS trigger and data acquisition system. We investigate the technology and its implications. We assess the performance of contemporary, commodity, off-the-shelf Ethernet switches/networks and interconnects. The results of the performance analysis are used to build switch models such that large ATLAS-like networks can be simulated and studied. Finally, we then look at the feasibility and prospect for Ethernet in the ATLAS second level trigger based on current products and estimates of the state of the technology in 2005, when ATLAS is scheduled to come on line.
    [Show full text]
  • Newnes Data Communications Pocket Book Newnes Data Communications Pocket Book
    Newnes Data Communications Pocket Book Newnes Data Communications Pocket Book Fourth edition Michael Tooley Steve Winder OXFORD AMSTERDAM BOSTON LONDON NEW YORK PARIS SAN DIEGO SAN FRANCISCO SINGAPORE SYDNEY TOKYO Newnes An imprint of Elsevier Science Linacre House, Jordan Hill, Oxford OX2 8DP 225 Wildwood Avenue, Woburn, MA 01801-2041 First published 1989 Reprinted 1990 Second edition 1992 Reprinted 1993, 1994, 1995 Third edition 1997 Reprinted 1998 (twice), 1999 Fourth edition 2002 Copyright Steve Winder and Mike Tooley, 1989, 1992, 1997, 2002. All rights reserved No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1P 4LP. Applications for the copyright holder’s written permission to reproduce any part of this publication should be addressed to the publishers British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library ISBN 0 7506 52977 For information on all Newnes publications visit our website at www.newnespress.com Typeset by Laserwords Private Limited, Chennai, India Printed and bound in Great Britain Contents Preface vii 1 Glossary 1 2 Terminals 37 3 Transmission media 48 4 Serial interfaces 68 5 Data communication equipment 103 6 Parallel interfaces 130 7 Communication protocols 146 8 Local area networks 149 9 Wide area networks 175 10 Transmission protocols 182 11 Reference information 212 Index 241 Preface Data communications continues to expand due to the increased use of multi-media computers and through the use of the Internet and company-wide Intranets.
    [Show full text]
  • Comparison of Communication Architectures for Spacecraft Modular Avionics Systems D.A
    National Aeronautics and NASA/TM—2006–214431 Space Administration IS20 George C. Marshall Space Flight Center Marshall Space Flight Center, Alabama 35812 Comparison of Communication Architectures for Spacecraft Modular Avionics Systems D.A. Gwaltney and J.M. Briscoe Marshall Space Flight Center, Marshall Space Flight Center, Alabama June 2006 The NASA STI Program Office…in Profile Since its founding, NASA has been dedicated to • CONFERENCE PUBLICATION. Collected the advancement of aeronautics and space papers from scientific and technical conferences, science. The NASA Scientific and Technical symposia, seminars, or other meetings sponsored Information (STI) Program Office plays a key or cosponsored by NASA. part in helping NASA maintain this important role. • SPECIAL PUBLICATION. Scientific, technical, or historical information from NASA programs, The NASA STI Program Office is operated by projects, and mission, often concerned with Langley Research Center, the lead center for subjects having substantial public interest. NASA’s scientific and technical information. The NASA STI Program Office provides access to • TECHNICAL TRANSLATION. the NASA STI Database, the largest collection of English-language translations of foreign aeronautical and space science STI in the world. scientific and technical material pertinent to The Program Office is also NASA’s institutional NASA’s mission. mechanism for disseminating the results of its research and development activities. These results Specialized services that complement the STI are published by NASA in the NASA STI Report Program Office’s diverse offerings include creating Series, which includes the following report types: custom thesauri, building customized databases, organizing and publishing research results…even • TECHNICAL PUBLICATION. Reports of providing videos. completed research or a major significant phase of research that present the results of For more information about the NASA STI Program NASA programs and include extensive data Office, see the following: or theoretical analysis.
    [Show full text]
  • Validación Experimental Por Inyección Física De Fallos De La Garantía De Funcionamiento De Un Sistema Multiprocesador Tolerante a Fallos
    Validación Experimental por Inyección Física de Fallos de la Garantía de Funcionamiento de un Sistema Multiprocesador Tolerante a Fallos por Rafael Javier Martínez Durá Tesis doctoral Dirigida por Prof. D. Pedro Joaquín Gil Vicente Prof. D. Gregorio Martín Quetglás Departamento de Informática y Electrónica Facultad de Ciencias Físicas Universitat de Valéncia UMI Number: U607739 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. Disscrrlation Püblish<¡ng UMI U607739 Published by ProQuest LLC 2014. Copyright in the Dissertation held by the Author. Microform Edition © ProQuest LLC. All rights reserved. This work is protected against unauthorized copying underTitle 17, United States Code. ProQuest LLC 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, MI 48106-1346 TOVOSfTAT DE VALbfCaA BIBLIOTECA CIÉ&ÍC1E3 -fe T r& icouo n ? r -- y ^ ? data ^ : A - " ...3 2 . 3 > o 3 > . T .b Í^LietSc , > * - . * ■ — ------------ . ' ■ — — 1 — «á iA Validación Experimental por Inyección Física de Fallos de la Garantía de Funcionamiento de un Sistema Multiprocesador Tolerante a Fallos por Rafael Javier Martínez Durá Dirigida por Prof. Pedro Joaquín Gil Vicente Prof. Gregorio Martín Quetglás TRIBUNAL CALIFICADOR Presidente Juan José Serrano Martín Cat. de Universidad U. Politécnica, de Valencia Vocales Antonio Pérez Ambite Cat. de Universidad U. Politécnica de Madrid José Miró Juliá Prof. Tit. de Universidad U. de las Islas Baleares Rafael Ors Carot Prof.
    [Show full text]
  • POLITECNICO DI MILANO Facolt`A Di Ingegneria Industriale Laurea Magistrale in Ingegneria Spaziale Wireless Technology for Space
    POLITECNICO DI MILANO Facolt`adi Ingegneria Industriale Laurea Magistrale in Ingegneria Spaziale Wireless technology for space applications: effects of Antenna Diversity radio transceiver selection Relatore: Prof. Mich`eleLAVAGNA Co-relatore: Ing. Jean-Fran¸coisDUFOUR Tesi di Laurea di: Vincenzo TAUMATURGO Matr. 735141 Anno Accademico 2010-2011 Sed omnia praeclara tam difficilia, quam rara sunt (Baruch Spinoza) Abstract The impact of the harness on a spacecraft mass budget can be around 5% of the total dry mass, moreover it leads to a further complexity in the design phase to think about an appropriate path for electric cables and data wired and to longer time spent for Assembly, Integration and Testing (AIT) activi- ties. An alternative is offered by wireless technologies, developed for commer- cial usage in the latest 1990s and introduced in the space application technol- ogy development since few years only. Moreover always more Commercial- Off-The-Shelf components satisfy the aerospace applications strict require- ments and they have been successfully used both in testing activities than in critical in-flight operations, however not a big amount of data is actually available about the behavior of these components under when exposed to radiation, even if this is one of the main requirements of a space applica- tion. In this thesis I evaluated the performances of a wireless IEEE 802.15.4 compliant radiotransceiver, designing a test sequence which aims to evalu- ate the possibility to use this component in an AIT activity, for instance as the communication block of a temperature sensor network. I tested the radiotransceiver in several scenarios representative for a space oriented ap- plication, like the Venus-Express mock-up.
    [Show full text]
  • ECSS-E-50-12A 24 January 2003
    Downloaded from http://www.everyspec.com ECSS-E-50-12A 24 January 2003 EUROPEAN COOPERATION ECSS FOR SPACE STANDARDIZATION Space engineering SpaceWire - Links, nodes, routers and networks ECSS Secretariat ESA-ESTEC Requirements & Standards Division Noordwijk, The Netherlands Downloaded from http://www.everyspec.com ECSS--E--50--12A 24 January 2003 ECSS Published by: ESA Publications Division ESTEC, P.O. Box 299, 2200 AG Noordwijk, The Netherlands ISSN: 1028-396X Price: 30 Printed in The Netherlands Copyright 2003 E by the European Space Agency for the members of ECSS 2 Downloaded from http://www.everyspec.com ECSS--E--50--12A ECSS 24 January 2003 Foreword This Standard is one of the series of ECSS Standards intended to be applied together for the management, engineering and product assurance in space projects and applications. ECSS is a cooperative effort of the European Space Agency, national space agencies and European industry associations for the purpose of developing and maintaining common standards. Requirements in this Standard are defined in terms of what shall be accomplished, rather than in terms of how to organize and perform the necessary work. This allows existing organizational structures and methods to be applied where they are effective, and for the structures and methods to evolve as necessary without rewriting the standards. The formulation of this Standard takes into account the existing ISO 9000 family of documents. This Standard has been prepared by the ECSS E--50--12 Working Group, reviewed by the ECSS Technical Panel and approved by the ECSS Steering Board. 3 Downloaded from http://www.everyspec.com ECSS--E--50--12A 24 January 2003 ECSS (This page is intentionally left blank) 4 Downloaded from http://www.everyspec.com ECSS--E--50--12A ECSS 24 January 2003 Introduction General SpaceWire technology has grown organically from the needs of on-board proces- sing applications.
    [Show full text]
  • (12) United States Patent (10) Patent No.: US 9,529,768 B2 Chu (45) Date of Patent: *Dec
    USO09529768B2 (12) United States Patent (10) Patent No.: US 9,529,768 B2 Chu (45) Date of Patent: *Dec. 27, 2016 (54) COMPUTER SYSTEM INCLUDING CPU OR (58) Field of Classification Search PERPHERAL BRIDGE DIRECTLY CPC G06F 13/4022: G06F 13/4027; G06F 13/364; CONNECTED TO ALOW VOLTAGE GO6F 13/385 DIFFERENTIAL SIGNAL CHANNEL THAT COMMUNICATES SERIAL BITS OF A (Continued) PERPHERAL COMPONENT (56) References Cited INTERCONNECT BUSTRANSACTION IN OPPOSITE DIRECTIONS U.S. PATENT DOCUMENTS (71) Applicant: Acqis LLC, McKinney, TX (US) 3.996,585 A 12/1976 Hogan et al. 4,141,068 A 2/1979 Mager et al. (72) Inventor: William W. Y. Chu, Los Altos, CA (Continued) (US) FOREIGN PATENT DOCUMENTS Assignee: Acqis LLC, McKinney, TX (US) (73) EP O722138 A1 T 1996 (*) Notice: Subject to any disclaimer, the term of this JP 6-289953 10, 1994 patent is extended or adjusted under 35 (Continued) U.S.C. 154(b) by 387 days. This patent is Subject to a terminal dis OTHER PUBLICATIONS claimer. Boosten, “Transmission Overhead and Optimal Packet Size', Mar. 11, 1998, printed on: Jan. 28, 2011, 2 pgs. Appl. No.: 14/209,922 (21) (Continued) (22) Filed: Mar. 13, 2014 Primary Examiner — Raymond Phan (65) Prior Publication Data (74) Attorney, Agent, or Firm — Cooley LLP US 2014/O195713 A1 Jul. 10, 2014 (57) ABSTRACT Related U.S. Application Data A computer system for multi-processing purposes. The (63) Continuation of application No. 13/744.287, filed on computer system has a console comprising a first coupling Jan. 17, 2013, now Pat. No. 8,756,359, which is a site and a second coupling site.
    [Show full text]
  • Standards Action Layout SAV3606.Fp5
    PUBLISHED WEEKLY BY THE AMERICAN NATIONAL STANDARDS INSTITUTE 25 West 43rd Street, NY, NY 10036 VOL. 36, # 6 February 11, 2005 Contents American National Standards Call for Comment on Standards Proposals ................................................ 2 Call for Comment Contact Information ....................................................... 7 Final Actions.................................................................................................. 9 Project Initiation Notification System (PINS).............................................. 12 International Standards ISO and IEC Draft Standards........................................................................ 14 ISO Newly Published Standards .................................................................. 16 Registration of Organization Names in the U.S............................................ 17 Proposed Foreign Government Regulations................................................ 17 Information Concerning ................................................................................. 18 Standards Action is now available via the World Wide Web For your convenience Standards Action can now be downloaded from the following web address: http://www.ansi.org/news_publications/periodicals/stan dards_action/standards_action.aspx?menuid=7 American National Standards Call for comment on proposals listed This section solicits public comments on proposed draft new American National Standards, including the national adoption of Ordering Instructions for "Call-for-Comment"
    [Show full text]