HSDPA RF generator
W-CDMA channels active in HSDPA mode
W-CDMA
Channel Default assignment Alternate choices
(spread factor)
CPICH (256) 0 —
P-CCPCH (256) 1 —
PICH (256) 16 14, 15, and 17
DPCH,
12.2 kb/s RMC 20 20, 29, 37, 45, 54
(128)
HSDPA
HS-SCCH-1 (128) 2 2, 6, 9, 10, 11, 16, 17
HS-SCCH-2 (128) 6 2, 6, 9, 10, 11, 16, 17
HS-SCCH-3 (128) 9 2, 6, 9, 10, 11, 16, 17
HS-SCCH-4 (128) 10 2, 6, 9, 10, 11, 16, 17
HS-PDSCH (16) 7 7 to 14
OCNS HSDPA (128) 122, 123, 124, 125, 126, 127
Common pilot channel relative level: –20 to 0 dB
Primary CCPCH relative level: –20 to 0 dB
PICH relative level: –20 to 0 dB
DPCH relative level: settable from –30 to 0 dB
with 0.01 dB resolution
HS-SCCH relative level of individual code channels:
settable from –20 to 0 dB
HS-PDSCH relative level of all active code channels:
settable from –20 to 0 dB
Primary sync channel relative level: always the same as P-CCPCH
Downlink CDMA modulation
Modulation type: QPSK and 16QAM per 3GPP standard
QPSK residual EVM: < 10%, typically < 3%
QPSK carrier feed through: < –25 dBc, typically < –35 dBc
nominal ambient performance: < –45 dBc
16QAM residual EVM: typically < 3%
16QAM carrier feed through: typically < –35 dBc
nominal ambient performance: < –45 dBc
OCNS – orthogonal channel noise source
Composed of 6 channels per Table E.5.5 in Annex E of
3GPP 34.121
OCNS channel relative level range: automatically calculated
from other code channel relative levels to provide the
composite W-CDMA cell power
HSDPA RF analyzer (measurements only)
Real-time demodulation of: uplink – DPCH, HS-DPCCH
Tx measurements
Channel power measurement
Measurement bandwidth
RRC filter off: measured with a bandwidth greater than
(1 +
α)*chip rate, where α = 0.22 and chip rate = 3.84 Mc/s
RRC filter on: measured with a filter that has a root-raised
cosine (RRC) filter response with roll-off
α = 0.22 and a
bandwidth equal to the chip rate (3.84 MHz BW centered on
the active uplink channel)
Measurement range: –61 to +28 dBm/3.84 MHz
Measurement interval: settable from 0.01 to 12 ms
Measurement accuracy (at ±10 °C from the calibration
temperature): < ±1.0 dB (typically < ±0.5 dB for measurement
intervals of 333 µs to 12 ms), < ±1.0 dB (typically < ±0.55 dB
for measurement intervals of 67 to < 333 µs)
Measurement triggers: auto, immediate, protocol, RF rise,
external, and HS-DPCCH
http://wireless.agilent.com/rfcomms/refdocs/wcdma/
wcdma_meas_chanpow_desc.php
Waveform quality measurement
Waveform quality measurement: composite EVM
Measurement format: HPSK
Measurement chip rate: 3.84 Mc/s
Input level range: –25 to +28 dBm/3.84 MHz
Measurement range: ≤ 35% EVM
Measurement interval: 0.5 to 1.0 timeslot with choice to include
or exclude 25 µs transient periods
Measurement triggers: auto, protocol, immediate,
external, and HS-DPCCH
HS-DPCCH trigger alignment: adjustable over
subframes 0 to 5
timeslots Ack Nack or CQI
subslots 0 to 0.5 timeslot
Other reported parameters with EVM:
• frequency error
• magnitude error
• phase error
• origin offset
• timing error
• peak code domain error
Frequency error measurement range: ±1 kHz
Timing error measurement range: ±10 µs
IQ tuning
All measurements found in the waveform quality measurement
are also available in the code domain measurement; the specifications are the same in both measurements.
http://wireless.agilent.com/rfcomms/refdocs/wcdma
wcdma_meas_iqtuning_desc.php
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