Rohde & Schwarz SMIQ02B - 3 GPP W-CDMA Signals in Time Domain; Background Information for the Generation of 3 GPP W-CDMA Signals

SMIQ Digital Standard 3GPP W-CDMA (FDD)
1125.5555.03 E-92.219
Parameter DPCCH + DPDCH mode:
DPCCH settings
POWER 0 dB
TIMING OFFSET 4 (fix)
TFCI STATE OFF
TFCI 0
FBI MODE OFF
FBI ALL 0
FBI PATTERN "0000 0000 0000 0000"
MISUSE TPC... OFF
TPC POWER STEP 0 dB
PREAMBLE POWER 0 dB
PREAMBLE POWER STEP 0 dB
DATA PART POWER 0 dB
CONTROL PART POWER 0 dB
SHARED RESOURCE... OFF
MESSAGE PART LENGTH 1
DPDCH settings
OVERALL SYMBOL RATE 30 ksps
POWER 0 dB
DATA PN15 (for all DPDCHs)
2.14.3 Background Information for the Generation of 3GPP W-CDMA Signals
This section provides some background information on W-CDMA signals to support the user in
generating signals with certain characteristics.
2.14.3.1 3GPP W-CDMA Signals in Time Domain
For information on 3GPP W-CDMA signals in the frequency domain refer to section 2.14.3.2.
Downlink
The two spreading methods for SCHs and the remaining (downlink) channel types are explained for the
channels P-CCPCH, P-SCH and S-SCH. (These three channels were referred to as “Perch” in previous
versions of the W-CDMA standard and option SMIQB45)
A (downlink) signal containing the following components is generated:
• P-CCPCH (-20 dB)
• P-SCH (-14 dB)
• S-SCH (-14 dB)
The SCH components are generated with double amplitude for better distinction against PCCPCH.
Sequence length = 1
Filtering: root cosine (roll-off = 0.22), impulse length = 32, oversampling = 8
Data source: PRBS23
No superimposed impairments active