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Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
Wireless communication involves transmitting signals through air and space using radio waves. Wireless spectrum is allocated by governments and international organizations. For example, in the United States, the 800-MHz frequency range is allocated for cellular voice communications. The higher the radio frequency, the greater the bandwidth and data carrying capacity of the wireless system. However, as frequency is increased in a system, its characteristics become more directional (line of site) and the signals are more susceptible to atmospheric conditions such as rain and fog.
Wireless technologies are used to build LANs within building and LANs that bridge buildings. They are also used to provide high-speed access to the Internet or to build metropolitan area networks. Wireless mobile systems with very high data-rates are emerging that allow mobile users to operate as if they are attached to traditional wired networks. A variety of technologies are discussed under various topics listed on the related entries page.
The United States FCC Web site provides useful information on wireless spectrum allocation. You can refer to the following Web sites for information on cellular radiotelephone services, general wireless communications services, microwave services, PCS (Personal Communications Service), and others.
You'll find addition wireless topics under the following headings:
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.