万智牌图片参考-时间漩涡2.doc

万智牌图片参考-时间漩涡2 THE ARRL
SPREAD
SPECTRUM
SOURCEBOOK
Edited By
Andre Kesteloot, N41CK
and
Charles L. Hutchinson, K8CH
Assistant Editor Joel P. Kleinman, N1 BKE
Published by
The American Radio Relay League, Inc
Copyright © 1991-1997 by
The American Radio Relay League, Inc.
Copyright secured under the Pan-American
Convention
This work is publication No, 121 of the
Radio Amateur's Library, published by the
League. All rights reserved. No part of this
work may be reproduced in any form
except by written permission of the
publisher. All rights of translation are
reserved.
Printed in USA
Quedan reservados toaos los derechos
ISBN: 0-87259-317-7
First Edition
Third Printing, 1997
Foreword
It is safe to say that amateur spread spectrum exists because of one unique entity-the
Amateur Radio Research and Development Corporation. Based in the Washington,
DC area, AMRAD played a key role in the development of amateur packet radio in
the early 1980s, and is continuing to lead the way in the realm of amateur spread
spectrum. Its members are dedicated to furthering the Amateur Radio art, and their
plishments speak for themselves.
It is altogether fitting, therefore, that this book be edited by long-time AMRAD
President Andre Kesteloot, N4ICK. He has done as much as anyone to spread the
word about the intriguing intricacies-and very real benefits-that spread spectrum
systems hold for the amateur service.
The League is proud to be associated with AMRAD's efforts to bring practical spread•
spectrum systems to the amateur bands. This book brings together articles, papers and
documents that provide an overview of how amateur spread spectrum evolved from a
short notice in the AMRAD Newsletter. This newsletter provided the bulk of the early
material on spread spectrum, but it wasn't long before QST and its then-new
experimenter's newsletter, QEX, took up the cause. Nearly all the spread spectrum
articles published in those three sources are