Goldsmith Wireless Communications book 05

Goldsmith Wireless Communications book 05 - WIRELESS...

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Unformatted text preview: WIRELESS COMMUNICATIONS Andrea Goldsmith Stanford University The possession of knowledge does not kill the sense of wonder and mystery. Ana s Nin Copyright c 2005 by Andrea Goldsmith Contents 1 Overview of Wireless Communications 1 1.1 History of Wireless Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Wireless Vision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3 Technical Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 Current Wireless Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.4.1 Cellular Telephone Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.4.2 Cordless Phones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.4.3 Wireless LANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.4.4 Wide Area Wireless Data Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.4.5 Broadband Wireless Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.4.6 Paging Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.4.7 Satellite Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.4.8 Low-Cost Low-Power Radios: Bluetooth and Zigbee . . . . . . . . . . . . . . . . . . . . 15 1.4.9 Ultrawideband Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1.5 The Wireless Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.5.1 Methods for Spectrum Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.5.2 Spectrum Allocations for Existing Systems . . . . . . . . . . . . . . . . . . . . . . . . . 18 1.6 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2 Path Loss and Shadowing 24 2.1 Radio Wave Propagation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.2 Transmit and Receive Signal Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2.3 Free-Space Path Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2.4 Ray Tracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2.4.1 Two-Ray Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.4.2 Ten-Ray Model (Dielectric Canyon) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2.4.3 General Ray Tracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2.4.4 Local Mean Received Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 2.5 Empirical Path Loss Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 2.5.1 The Okumura Model . The Okumura Model ....
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This note was uploaded on 05/19/2010 for the course ELECTRICAL ECSE 493 taught by Professor Tholengoc during the Spring '10 term at McGill.

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