查看完整版本: 25213-700-Spreading and modulation (FDD)

25213-700-Spreading and modulation (FDD)

25213-700-Spreading and modulation (FDD).pdf

Contents
Foreword...........................................................................................................................................................5
1 Scope.......................................................................................................................................................6
2 References...............................................................................................................................................6
3 Symbols and abbreviations......................................................................................................................6
3.1 Symbols............................................................................................................................................................6
3.2 Abbreviations....................................................................................................................................................6
4 Uplink spreading and modulation............................................................................................................7
4.1 Overview...........................................................................................................................................................7
4.2 Spreading..........................................................................................................................................................7
4.2.1 Dedicated physical channels.......................................................................................................................7
4.2.1.1 DPCCH/DPDCH.........................................................................................................................................8
4.2.1.2 HS-DPCCH.........................................................................................................................................10
4.2.1.3 E-DPDCH/E-DPCCH..........................................................................................................................11
4.2.2 PRACH.....................................................................................................................................................14
4.2.2.1 PRACH preamble part..........................................................................................................................14
4.2.2.2 PRACH message part...........................................................................................................................14
4.2.3 Void...........................................................................................................................................................15
4.3 Code generation and allocation.......................................................................................................................15
4.3.1 Channelisation codes.................................................................................................................................15
4.3.1.1 Code definition....................................................................................................................................15
4.3.1.2 Code allocation for dedicated physical channels..................................................................................16
4.3.1.2.1 Code allocation for DPCCH/DPDCH.............................................................................................16
4.3.1.2.2 Code allocation for HS-DPCCH.....................................................................................................16
4.3.1.2.3 Code allocation for E-DPCCH/E-DPDCH.....................................................................................16
4.3.1.3 Code allocation for PRACH message part...........................................................................................17
4.3.1.4 Void.....................................................................................................................................................17
4.3.1.5 Void.....................................................................................................................................................17
4.3.2 Scrambling codes......................................................................................................................................17
4.3.2.1 General................................................................................................................................................17
4.3.2.2 Long scrambling sequence...................................................................................................................17
4.3.2.3 Short scrambling sequence...................................................................................................................18
4.3.2.4 Dedicated physical channels scrambling code......................................................................................19
4.3.2.5 PRACH message part scrambling code................................................................................................19
4.3.2.6 Void.....................................................................................................................................................20
4.3.2.7 Void.....................................................................................................................................................20
4.3.3 PRACH preamble codes............................................................................................................................20
4.3.3.1 Preamble code construction..................................................................................................................20
4.3.3.2 Preamble scrambling code....................................................................................................................20
4.3.3.3 Preamble signature..............................................................................................................................20
4.3.4 Void...........................................................................................................................................................21
4.4 Modulation......................................................................................................................................................21
4.4.1 Modulating chip rate.................................................................................................................................21
4.4.2 Modulation................................................................................................................................................21
5 Downlink spreading and modulation.....................................................................................................22
5.1 Spreading........................................................................................................................................................22
5.1.1 Modulation mapper...................................................................................................................................22
5.1.1.1 QPSK...................................................................................................................................................22
5.1.1.2 16QAM................................................................................................................................................23
5.1.2 Channelisation...........................................................................................................................................23
5.1.3 IQ combining............................................................................................................................................23
5.1.4 Scrambling................................................................................................................................................23
5.1.5 Channel combining...................................................................................................................................23
5.2 Code generation and allocation.......................................................................................................................24
5.2.1 Channelisation codes.................................................................................................................................24 3GPP
R elease 7T 4 3GPP TS 25.213 V7.0.0 (2006-03)
5.2.2 Scrambling code........................................................................................................................................25
5.2.3 Synchronisation codes...............................................................................................................................26
5.2.3.1 Code generation...................................................................................................................................26
5.2.3.2 Code allocation of SSC.........................................................................................................................27
5.3 Modulation......................................................................................................................................................29
5.3.1 Modulating chip rate.................................................................................................................................29
5.3.2 Modulation................................................................................................................................................29
Annex A (informative): Generalised Hierarchical Golay Sequences.................................................30
A.1 Alternative generation...........................................................................................................................30
Annex B (informative): Change history...............................................................................................31

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