
WCDMA Generator
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
909
User Manual 1173.9657.02 ─ 11
6.2.2.1
SCH and P-CCPCH
The Primary Synchronization Channel (P-SCH) carries a complex-valued 256-chip
code c
p
depending on the Space Time Transmit Diversity (STTD) encoding on the P-
CCPCH and is used for slot synchronization between the R&S
CMW and the UE.
The Secondary Synchronization Channel (S-SCH) carries a complex-valued 256-chip
code c
g,i
s
depending on the slot number i, the scrambling code group g, and the STTD
encoding on the P-CCPCH. It is used for frame synchronization between the instru-
ment and the UE.
Both P-SCH and S-SCH are time-multiplexed with the P-CCPCH as shown below.
Fig. 6-2: Structure of SCH and P-CCPCH
The Primary Common Control Physical Channel (P-CCPCH) carries the BCH transport
channel. It is not transmitted during the first 256 chips of each slot. In contrast to the S-
CCPCH it has a fixed predefined transport format combination and contains no TFCI
field.
6.2.2.2
Secondary Common Control Physical Channel (S-CCPCH)
The S-CCPCH contains a TFCI field, a data field and a pilot field. The detailed struc-
ture in the time domain is shown below:
General Description
深圳德标仪器
135-1095-0799