March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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There are sixteen different secondary synchronization codes in total. One code is sent at the
beginning of the time slot, i.e. the first 256 chips. It consists of fifteen synchronization codes, and
there are sixty-four different scrambling code groups. When received, the UE is able to determine
before which synchronization code the overa ll frame begins. In this way, the UE is able to gain
complete synchronization.
The scrambling codes in the S-SCH also enable the UE to identify which scrambling code is being
used, and hence it can identify the base station. The scrambling codes are divided into sixty-four
code groups, each havin g eight codes. This means that after achieving frame synchronization, the
UE only has a choice of one in eight codes
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