Électronique et automatique
201 documents à télécharger gratuitement
Cours, examens, TD, TP et exercices de électronique et automatique. Thèmes couverts : automatisme, asservissement, microcontrôleur, Arduino, VHDL, signal.
This thesis addresses the development of an automatic identity authentication system using digital fingerprints. It emphasizes the implementation of the most effective algorithms for comparing fingerprints. The study also covers various aspects of biometric recognition and its applications in security systems.
This document discusses the principles of digital communications and information theory. It covers topics such as signal representation, sampling, digital modulation, and error correction codes. The content is structured into multiple chapters addressing different aspects of the subject matter.
Ce document traite des principes de la transmission numérique dans un canal à bande passante limitée. Il aborde des sujets tels que la caractérisation des canaux, la démodulation des signaux et le rapport signal-sur-bruit. Les exemples incluent des calculs spécifiques pour le SNR en présence de bruit AWGN.
This document covers the characteristics of noisy transmission channels in telecommunications. It discusses the impact of noise on digital communications and strategies to ensure reliable signal transmission. Additionally, it includes various techniques for error correction and channel coding.
This document covers the fundamentals of digital communication focusing on signal filtering. It discusses various types of filters, Fourier methods, and the effects of noise on signal processing. Practical applications and theoretical concepts related to Nyquist criteria are also presented.
This document provides an overview of digital communication techniques with a focus on signal filtering. It covers various filter methods, including the Fourier method and adaptive filtering, as well as the impact of noise on signal transmission. Additionally, it discusses the Nyquist criterion and various types of filters used in digital communication.
This document outlines the objectives and structure of a module focused on VHDL, a hardware description language. It includes a detailed breakdown of VHDL's principles, syntax, and application in the design and synthesis of digital systems. The module also covers the historical development and relevance of VHDL in modern electronics.
This document outlines the objectives and structure of a course focused on the VHDL language, emphasizing digital circuit modeling and synthesis. It includes information on course topics such as basic elements, syntax, and standard operators. The course aims to provide students with a comprehensive understanding of VHDL for digital systems design.
This document provides a detailed overview of finite state machines (FSMs) in VHDL, discussing both Moore and Mealy machines. It covers theoretical aspects, characteristics, advantages, and disadvantages of each type of FSM, along with their representation and coding in VHDL. The document serves as an educational resource for students in the field of digital systems and signal processing.
This document describes the principles and examples of linear signal filtering, covering various types of filters, their functions, and practical implementations. It explains the importance of filtering in signal processing applications, including audio and radio frequency environments. Key concepts include filter responses and the characteristics of different filter types.
This paper presents a practical method for calculating the acoustic response of a rigid sphere. The method employs a combination of physical optics and modal techniques to address issues faced when using each method independently. The authors focus on calculating the impulse response of the sphere in a backscattering scenario.
This document covers advanced topics in signal processing, focusing on transformations and filter analysis. It includes definitions, properties, and classifications of various transforms like Fourier and Z-transform. The text is aimed at students in their third year of studies in electronics and computer science.
This document contains an exam on signal processing, focusing on impulse response, system properties, signal reconstruction, spectral folding, and numerical filtering. The exam includes theoretical questions and requires proofs and explanations. It assesses the understanding of fundamental concepts in continuous and discrete-time systems.
This document serves as a comprehensive guide on the theoretical aspects of signal processing. It covers trigonometric formulas, mathematical models of signals, properties of linear systems, and concepts such as convolution and signal representation. The material is aimed at students and professionals in the field of signal and image processing.
This document discusses random signals and their properties, focusing on the probabilistic nature of these signals. It explores the relationship between physical phenomena and randomness in signals, highlighting examples like speech, electromyograms, and brain activity. The text serves as an introductory guide to understanding random processes in engineering contexts.
These course notes provide an introduction to stochastic processes and their probabilistic characteristics. Key topics include the definition of stochastic processes, important statistical characteristics, and notable stochastic processes like Gaussian and Markov processes. The document also covers linear systems and their relationship with stochastic processes.
This document presents a course on signal processing. It covers fundamental concepts such as Fourier transforms, correlation, spectra, and various types of signal classes. The course outlines essential properties and techniques used in analyzing and synthesizing information.
Cette thèse traite de l'utilisation de la Tomographie par Cohérence Optique (OCT) pour améliorer la reconnaissance biométrique par empreintes digitales. Elle aborde les limitations existantes dans l'identification biométrique, telles que la détérioration des empreintes et les failles de sécurité des capteurs. La recherche propose des solutions pour rendre la biométrie plus robuste et sécurisée en exploitant la richesse de l'information biologique.
This document discusses the fundamentals of fingerprint recognition, covering definitions, types of fingerprints, and their unique properties. It elaborates on the classification system, preprocessing techniques, and the matching process between fingerprints, highlighting the challenges and safeguards in the field. Additionally, it explores sensors used in fingerprint capture and the complexities involved in accurate identification.
This document presents a thesis on the characterization of non-stationary signals with non-linear time-frequency components. It includes the author's curriculum vitae and outlines various academic and research activities. The work is a part of the author's habilitation to supervise research at the Institut Polytechnique de Grenoble.
Ce chapitre aborde les processus aléatoires en temps continu, en se concentrant sur les modèles de canaux continus. Il couvre des notions fondamentales comme le théorème d'échantillonnage et les entropies différentielles, tout en introduisant les concepts de stationnarité et d'ergodicité. Enfin, les entropies différentielles sont rappelées pour enrichir la compréhension des signaux et de leur traitement.
This document discusses Orthogonal Frequency Division Multiplexing (OFDM) and its application in frequency-selective and non-selective channels. It covers the impact of inter-symbol interference (ISI) and methods for mitigation, including modulation techniques and channel equalization strategies. The document provides MATLAB code examples to illustrate the concepts.
This document outlines an exam for a course on Object-Oriented Analysis and Design, conducted at Université de la Manouba in the 2012-2013 academic year. The exam focuses on the specification of a new electronic voting application, detailing its intended functionalities before, during, and after elections. Students are expected to respond accurately and clearly to the given exercises within a specified time frame.
The document provides an overview of programming concepts crucial for embedded systems and DSP. It discusses pointers, arrays, functions, and bit manipulation, alongside examples and exercises on dynamic memory allocation. Additionally, it addresses passing parameters, multi-dimensional arrays, and local variables, offering theoretical insights and practical activities to reinforce learning. Key sections include syntax demonstration, memory management techniques, and function usage in C programming.