[...]... telegraph and telephone services did, they were initially called wireless communications, a term that would continue in use in various parts of the world for several Fixed Broadband Wireless System Design Harry R Anderson  2003 John Wiley & Sons, Ltd ISBN: 0-4 7 0-8 443 8-8 2 FIXED BROADBAND WIRELESS SYSTEMS decades The universal use of the term wireless rather than radio has now seen a marked resurgence to... the mix of technologies used for fixed broadband wireless communications Accordingly, FSO systems will be covered in some detail in this book 1.3 MODELS FOR WIRELESS SYSTEM DESIGN The process of designing a fixed broadband wireless communications system inherently makes use of many, sometimes complex, calculations to predict how the system MODELS FOR WIRELESS SYSTEM DESIGN 5 will perform before it is actually... remaining chapters set forth the specific details of many types of line-of-sight (LOS) and non-line-of-sight (NLOS) systems, including elemental point-to-point links as well as point-to-multipoint, consecutive point, and mesh networks Because of their importance, a separate chapter is devoted to designing both LOS and NLOS point-to-multipoint networks The final chapter deals with the important subject... early 1980s The so-called third generation (3G) systems that can support both voice and data communications are now on the verge of being deployed Fixed wireless systems were originally designed to provide communication from one fixed-point terminal to another, often for the purpose of high reliability or secure communication Such systems are commonly referred to as ‘point-to-point (PTP)’ systems As technology... microwaves because of the short EM wavelength The common band designations are shown in Table 1.2 Telephone engineers took advantage of the fact that Table 1.2 Microwave frequency bands Microwave band name Frequency range (GHz) L-band S-band C-band X-band Ku band K-band Ka band 1–2 2–4 4–8 8–12 12–18 18–27 27–40 4 FIXED BROADBAND WIRELESS SYSTEMS PTP microwave links used in consecutive fashion could... country Designing and deploying 10 FIXED BROADBAND WIRELESS SYSTEMS Table 1.3 Examples of US licensed fixed wireless bands Frequency band (GHz) Service name Notes 2.150–2.156 2.156–2.162 2.156–2.160 2.500–2.690 MDS1 MDS2 MDS2A MMDS/ITFS 3.8–4.2 5.9–7.1 10.7–11.7 12.7–13.25 — — — — 17.7–18.820 — Single 6-MHz channel for MMDS services Single 6-MHz channel for MMDS services Narrow 4-MHz MMDS channel Thirty-one... allows users of the wireless service to purchase off-the-shelf wireless modems for connecting to a system In the United States, the 11-Mbps IEEE 802.11b standard that specifies Direct Sequence Spread Spectrum (DSSS) technology operating in the 2.4-GHz band is the best current example of selfdeployed license-exempt technology However, license-exempt bands offer no regulatory 11 LICENSE-EXEMPT BANDS Table... are most commonly used on the Internet are • E-mail • Web-browsing • File and image download and general file transfer via file transfer protocol (FTP) • Streaming audio files for ‘real-time’ audio connections • Streaming video files for ‘real-time’ video connections • Voice over Internet protocol (VoIP), also a ‘real-time’ service 8 FIXED BROADBAND WIRELESS SYSTEMS As discussed in some detail later in... are included where necessary to provide this foundation knowledge In addition to design engineers who deal with fixed broadband wireless systems on a daily basis, this book is also well suited to graduate and post-graduate level courses that are focused on wireless communications engineering Wireless communication system design and planning is an increasingly important area that warrants serious academic... and encouraged I hope and anticipate that this book will prove to be a worthwhile addition to the engineering libraries of those who design, deploy, and manage fixed broadband wireless systems Harry R Anderson Eugene, Oregon, USA January, 2003 1 Fixed broadband wireless systems 1.1 INTRODUCTION The theoretical origin of communications between two points using electromagnetic (EM) waves propagating through . y0 w0 h0" alt="" FIXED BROADBAND WIRELESS SYSTEM DESIGN FIXED BROADBAND WIRELESS SYSTEM DESIGN HARRY R. ANDERSON, Ph.D., P.E. CONSULTING ENGINEER USA Copyright  2003 John Wiley & Sons Ltd,. Cataloging-in-Publication Data Anderson, Harry R. Fixed broadband wireless system design / Harry R. Anderson. p. cm. Includes bibliographical references and index. ISBN 0-4 7 0-8 443 8-8 (alk. paper) 1. Wireless. the specific details of many types of line-of-sight (LOS) and non-line-of-sight (NLOS) systems, including elemental point-to-point links as well as point-to-multipoint, consecutive point, and mesh