March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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Frequency hopping is relatively easy to implement in GSM because the RF section of the mobile is
already moving between different frequencies for transmit and receive, changing frequency during
the dead periods when neither the transmitter nor receiver are active.
In order to coordinate the transmit and receive channels and ensure that the BTS and mobile hop
in synchronism, the hopping algorithm is broadcast on th e Broadcast Control Channel.
Short message service
The Short Message Service (SMS) is a feature that is widely used on GSM mobiles today. It provi des
the ability to send and receive text messages to and from mobile telephones. The text can comprise
words or numbers, or an alphanumeric combination. SMS was created as part of the GSM Phase ...
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