Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard 3GPP W-CDMA (FDD)2.14.3.5.3 Effect of SCHThe SCH is not orthogonal to the DPCHs and all other downlink channels since the synchronizationcode symbol is spread according to a special scheme (see section 2.14.1.1, System Components).In the following example, the channels P-SCH, S-SCH, CPICH, P-CCPCH and two DPCHs (15 ksps tocode 7 and 12) are included. If the SCH is compensated with the code domain power analysis, thechannel powers can be determined ideally:Fig. 2-156CDPA of a signal with compensated SCHIf the SCH is not compensated, crosstalk to the other channels can be clearly seen:Fig. 2-157Effect of SCH on CDP analysis (without compensation)The transmitted channels are measured with an error of