December 2001
Intermediate to advanced
656 pages
27h 19m
English
Content preview from Networking Explained, 2nd Edition
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Chapter 18: Wireless Networking 545
are separated by frequencies similar to the way radio stations are separated by frequencies.
That is, one transmission (a telephone call) occurs on one frequency, a second transmission
takes place on a second frequency, and so forth. FDMA is used in analog cellular networks
such as the Advanced Mobile Phone System (AMPS), which is discussed later.
Time Division Multiple Access (TDMA) TDMA is a digital technique (i.e., it first digi-
tizes conversations) and employs exactly the same access method as the wired world’s time
division multiplexing (TDM, see Chapter 4). More specifically, TDMA partitions a cellular
channel ...
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