munications_Goldsmith外文文献.pdf

MUNICATIONS
Andrea Goldsmith
Stanford University
The possession of knowledge does not kill the sense of wonder and mystery.
Ana¨ıs Nin
Copyright
c 2005 by Cambridge University Press.
This material is in copyright. Subject to statutory exception and to the provisions of relevant collective licensing
agreements, no reproduction of any part may take place without the written permission of Cambridge University
Press.
Contents
1 Overview of munications 1
History of munications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Wireless Vision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Current Wireless Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cellular Telephone Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cordless Phones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wireless LANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wide Area Wireless Data Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Broadband Wireless Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Paging Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Low-Cost Low-Power Radios: Bluetooth and Zigbee . . . . . . . . . . . . . . . . . . . . 15
Ultrawideband Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
The Wireless Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Methods for Spectrum Allocation . . . . . . . . . . . . .