Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard 3GPP W-CDMA (FDD)Slot and frame builderThe bits from the data source are first entered into a frame structure. The frames are made up of twohierarchical levels:Table 2-22Hierarchical structure of 3GPP W-CDMA framesHierarchy Length in ms RemarksTime slot 0.667Radio frame 10 After a radio frame, pilot symbols are repeated. A radioframe consists of 15 time slots. This is also the length of ascrambling code cycle. Frames are the basic unit in the SMIQ.The sequence length is stated in radio frames.The configuration of the time slots depends on the channel type and symbol rate.The following components are distinguished:• Pilot sequenceThe pilot sequence characterizes the time slot position within the radio frame and also depends onthe symbol rate, transmit diversity and the pilot length parameter.Channel types DPCH, S-CCPCH, DL-DPCCH, DPCCH, PRACH and PCPCH have a pilotsequence.The pilot sequence cannot be changed by the user.• Synchronization code symbolThe synchronization code symbol is the only symbol of the SCH.It is fixed to “11“.• TPC symbolThis symbol is used to control the transmit power. It is used in DPCH, DL-DPCCH and DPCCH.A bit pattern for the sequence of TPC symbols can be indicated as a channel-specific pattern.• Data symbolsThese symbols carry the user information and are fed from the data source. They are used inDPCH, P-CCPCH, S-CCPCH,PDSCH, DL-DPCCH, DPDCH, PRACH and PCPCH.• SignatureThe signature is used in PRACH and PCPCH. 16 fix bit patterns are defined of which the user mayselect one.• TFCIThe “Transport Format Combination Indicator“ is used in DPCH/DPCCH if the corresponding buttonof the interface (Base Station Configuration, see section 2.14.2.5/ Mobile Station Configuration, seesection 2.14.2.6) is activated. In this case, a code sequence with the length of 30 is defined usingthis value and distributed among 15 subsequent time slots. In PRACH and PCPCH, the TFCI field isprovided as standard.• FBIFeedback indication bits are only used in DPCCH and PCPCH.1125.5555.03 2.175E-9