tailieunhanh - Wireless Networking in the Developing World

Many designations used by manufacturers and vendors to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the authors were aware of a trademark claim, the designations have been printed in all caps or initial caps. All other trademarks are property of their respective owners. The authors and publisher have taken due care in preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the. | Wireless Networking in the Developing World Second Edition A practical guide to planning and building low-cost telecommunications infrastructure Wireless Networking in the Developing World For more information about this project visit us online at http First edition January 2006 Second edition December 2007 Many designations used by manufacturers and vendors to distinguish their products are claimed as trademarks. Where those designations appear in this book and the authors were aware of a trademark claim the designations have been printed in all caps or initial caps. All other trademarks are property of their respective owners. The authors and publisher have taken due care in preparation of this book but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information contained herein. 2007 Hacker Friendly LLC http SOME RIGHTS RESERVED This work is released under the Creative Commons Attribution-ShareAlike license. For more details regarding your rights to use and redistribute this work see http licenses by-sa Contents Where to Begin 1 Purpose of this Fitting wireless into your existing Wireless networking Question A Practical Introduction to Radio Physics 9 What is a wave .9 The electromagnetic Bandwidth. .15 Frequencies and Behavior of radio Line of Physics in the real Network Design 27 Designing the physical wireless Mesh networking with OLSR. 56 Estimating Traffic Internet link optimization. 89 More Antennas Transmission Lines 95 Cables. 95 Waveguides. 97 Connectors and Antennas radiation patterns. 102 Reflector .