Digital Standard 3GPP W-CDMA (FDD)
SMIQ
1125.5555.03
E-9
2.214
Table 2-24 Change of crest factor in the case of clipping
Crest factor with scenario
CLIPPING LEVEL
Downlink:
10 DPCHs "minimum
crest" 30 ksps
Downlink:
10 DPCHs "worst
crest" 30 ksps
Downlink:
10 DPCHs "average
crest" 30 ksps
Downlink:
128 DPCHs "average
crest" 30 ksps
100%
9.89 dB
14.7 dB
10.9 dB
21.7 dB
80%
8.86 dB
12.9 dB
9.39 dB
20.2 dB
50%
7.50 dB
10.1 dB
8.29 dB
16.9 dB
20%
5.50 dB
6.47 dB
6.23 dB
12.5 dB
10%
5.34 dB
6.06 dB
5.80 dB
9.57 dB
5%
5.34 dB
6.06 dB
5.80 dB
8.17 dB
Effect of clipping on the constellation shown by way of a 4-DPCH configuration:
Fig. 2-131
Constellation at clipping level 100% (not clipped)
Fig. 2-132
Constellation at clipping level 50%
