211 and will not be repeated here [18]. The pilot bit field contains a
known sequence of bits that changes in each time slot and repeats every frame. These pilot bits can be
used to aid CE for coherent detection, assist in beam forming, aid SIR estimation, perform frames synchronization,
and so forth. The TFCI bits inform the receiver about the instantaneous transport format
combination of the transport channels mapped to the simultaneously transmitted DPDCH radio frame.
The FBI bits are used to support feedback information required from the UE for such application
as CLTD. Lastly, the TPC bits are used to convey power control commands to adjust the downlink
NodeB transmit power. Since these TPC bits are all of the same polarity (i.e., either all 1s or all 0s),
it is conceivable that they also can be used to aid the CE or other algorithms, if so required.
The frame and time slot structure for the next two uplink DPCHs is given in Fig. 7.36 for E-DPDCH
and E-DPCCH. These channels correspond to the enhanced DPCH support.
372 CHAPTER SEVEN
FIGURE 7.36 Uplink E-DPDCH and E-DPCCH time and frame structure.
Data = NData Bits
10 Bits
E-DPDCH
E-DPCCH
2560 Chips
Slot #i . . . . . . Slot #0 Slot #14
10 msec
The SF of E-DPCCH is fixed at 256 while the SF for E-DPDCH can vary from 256 down to 2.
Pages:
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611