Fundamentals of GPS Receivers A Hardware Approach
While much of the current literature on GPS receivers is aimed at those intimately familiar with their workings, this volume summarizes the basic principles using as little mathematics as possible, and details the necessary specifications and circuits for
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Dan Doberstein
Fundamentals of GPS Receivers A Hardware Approach
Dan Doberstein DKD Instruments 750 Amber Way Nipomo, CA, USA [email protected]
Please note that additional material for this book can be downloaded from http://extras.springer.com ISBN 978-1-4614-0408-8 e-ISBN 978-1-4614-0409-5 DOI 10.1007/978-1-4614-0409-5 Springer New York Dordrecht Heidelberg London Library of Congress Control Number: 2011938456 # Springer Science+Business Media, LLC 2012
All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed on acid-free paper Springer is part of Springer ScienceþBusiness Media (www.springer.com)
Preface
If one examines the current literature on GPS receiver design, most of it is quite a bit above the level of the novice. It is taken for granted that the reader is already at a fairly high level of understanding and proceeds from there. This text will be an attempt to take the reader through the concepts and circuits needed to be able to understand how a GPS receiver works from the antenna to the solution of user position. To write such a text is not trivial. It is easy to get distracted in the GPS receiver. Many papers and articles deal with the minutiae of extracting the last little bit of accuracy from the system. That is not the goal of this text. The primary goal of this text is to understand a GPS receiver that solves for the “first-order” user position. What is meant mean by “first-order solution”? The best way to answer that question is another question and that is, “What do we have to do to build the minimum GPS receiver system to give user Position accurate to approximately 300 m?” The reader should know that as desired accuracy of position or time solutions increases so does the complexity of the receiver. In pursuing the 300-m goal, the reader will gain an understanding of the core principles present in all GPS receivers. It is hoped that the reader will then be able to proceed from there to understand the later techniques presented that achieve accuracy above this level. A major problem in writing this text is the assumed background of the reader. It is not possible inside this text to start at receiver fundamentals and work from there. An assumed background level is needed. The basic background of the reader should include an understanding of analog narrow-band radio receivers, basic digital circuits, algebra, trig and conce
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