March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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optimized for data applications. If voice is required, then a dual mode phone using a separate
1X channel for the voice call is needed. In fact, the ‘phones’ used for data only applications are
referred to as Access Terminals (ATs).
EV-DO air interface
The EV-DO RF transmission is very similar to that of a CDMA2000 1X transmission. It has the
same final spread rate of 1.2288 Mcps, and it has the same modulation bandwidth because the
same digital filter is used. Although 1xEV-DO transmissions have many similarities with 1X
transmissions, they do not occupy the same channels simultaneously, and therefore EV-DO
uses dedicated paired channels for its
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