Communication Systems
This revised textbook fully updates its comprehensive coverage of Fourier transform, convolution, and definitions of autocorrelation and power spectral density. The new edition reflects the emergence of a variety of new services and systems. I
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Communication Systems Second Edition
Communication Systems
Marcelo S. Alencar Valdemar C. da Rocha Jr. •
Communication Systems Second Edition
123
Marcelo S. Alencar Institute of Advanced Studies in Communications Federal University of Bahia Salvador, Paraíba, Brazil
Valdemar C. da Rocha Jr. Institute of Advanced Studies in Communications Federal University of Pernambuco Recife, Pernambuco, Brazil
ISBN 978-3-030-25461-2 ISBN 978-3-030-25462-9 https://doi.org/10.1007/978-3-030-25462-9
(eBook)
1st edition: © Springer Science+Business Media, Inc. 2005 2nd edition: © Springer Nature Switzerland AG 2020 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This Springer imprint is published by the registered company Springer Nature Switzerland AG The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland
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Preface
This book is the result of several years of teaching and research at the Federal University of Campina Grande, Federal University of Pernambuco, and Federal University of Bahia, Brazil. It is intended to serve as a textbook for courses dealing with Communication Systems, Cellular Mobile Systems, or Modulation Theory. The modulation theory is dealt with using stochastic processes, which remains a novel approach for undergraduate texts. The book is suitable for the undergraduate as well as the initial graduate levels of Electrical Engineering courses. Chapter 1 covers signal and Fourier analysis and presents an introduction to Fourier transform, convolution, and definitions of autocorrelation and power spectral density. Chapter 2 introduces the concepts of probability, random variables, and stochastic processes and their applications to the analysis of linear systems. Speech coding is dealt with in Chap. 3, which also deals with digitizing of analog signals, quantization, and coding for compress
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