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3GPP TS 25.223
Spreading and modulation (TDD)
Contents
Foreword 4
1 Scope 5
2 References 5
3 Symbols and abbreviations 5
3.1 Symbols 5
3.2 Abbreviations 5
4 General 6
5 Data modulation 6
5.1 Symbol rate 6
5.2 Mapping of bits onto signal point constellation 6
5.2.1 Mapping for burst type 1 and 2 6
5.2.2 Mapping for burst type 3 7
6 Spreading modulation 7
6.1 Basic spreading parameters 7
6.2 Channelisation codes 7
6.3 Channelisation Code Specific Multiplier 8
6.4 Scrambling codes 9
6.5 Spread signal of data symbols and data blocks 9
6.6 Modulation 10
6.6.1 Combination of physical channels in uplink 10
6.6.2 Combination of physical channels in downlink 11
7 Synchronisation codes 12
7.1 Code Generation 12
7.2 Code Allocation 13
7.2.1 Code allocation for Case 1 14
7.2.2 Code allocation for Case 2 14
7.3 Evaluation of synchronisation codes 15
Annex A (normative): Scrambling Codes 16
Annex B (informative): Generalised Hierarchical Golay Sequences 19
B.1 Alternative generation 19
Annex C (informative): Change history 20
25223-380.doc
(2007-07-03 09:24:58, Size: 1.05 MB, Downloads: 0)
