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3GPP TS 36.211 V2.0.0 (2007-09)Technical Specification
3rd Generation Partnership Project;Technical Specification Group Radio Access Network;Evolved Universal Terrestrial Radio Access (E-UTRA);
Physical Channels and Modulation(Release 8)
The present document has been developed within the 3 rdGeneration Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP.
The present document has not been subject to any approval process by the 3GPPOrganizational Partners and shall not be implemented.This Specification is provided for future development work within 3GPPonly. The Organizational Partners accept no liability for any use of this Specification.
Specifications and reports for implementation of the 3GPPTMsystem should be obtained via the 3GPP Organizational Partners' Publications Offices.
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KeywordsUMTS, radio, layer 1
3GPP
Postal address
3GPP support office address
650 Route des Lucioles - Sophia AntipolisValbonne - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Internet
http://www.3gpp.org
Copyright Notification
No part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.
2006, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).All rights reserved.
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Contents
Foreword .................................. ........................................... ........................................ .......................................6
1 Scope.......................................................................................................................................................6
2 References ........................................... ............................................... ........................................... ...........6
3 Definitions, symbols and abbreviations .................................. ....................................... ..........................73.1 Symbols .............................................................................................. ................................................................... 73.2 Abbreviations ................................................................................................... ..................................................... 8
4 Frame structure.........................................................................................................................................84.1 Frame structure type 1 ....................................................................... ................................................................... 84.2 Frame structure type 2 ....................................................................... ................................................................... 9
5 Uplink.......................................................................................................................................................9 5.1 Overview ..................................................................................... .......................................................................... 95.1.1 Physical channels ....................................................................................... ..................................................... 95.1.2 Physical signals .......................................................................................... ..................................................... 95.2 Slot structure and physical resources................................... ............................................................................... 105.2.1 Resource grid....................................................................................... .......................................................... 105.2.2 Resource elements ........................................................................ ................................................................. 115.2.3 Resource blocks................................................................................... .......................................................... 115.3 Physical uplink shared channel ............................................................................... ............................................ 115.3.1 Scrambling.......................................................................................... ........................................................... 115.3.2 Modulation ............................................................................................ ........................................................ 125.3.3 Transform precoding ...................................................................................... ............................................... 125.3.4 Mapping to physical resources......................... .................................................................................... ......... 125.4 Physical uplink control channel ................................................................................... ....................................... 125.4.1 Scrambling.......................................................................................... ........................................................... 135.4.2 Modulation ............................................................................................ ........................................................ 135.4.2.1 Sequence modulation for PUCCH format 0 and 1 ........................................................................ ......... 135.4.2.2 Sequence modulation for PUCCH format 2 .................................................................................. ......... 145.4.3 Mapping to physical resources......................... .................................................................................... ......... 14
5.5 Reference signals ............................................................................................ .................................................... 145.5.1 Generation of the base reference signal sequence ............................................................................... ......... 145.5.1.1 Reference signal sequences of length 36 or larger ................................................................................. 155.5.1.2 Reference signal sequences of length less than 36 ................................................................................. 155.5.2 Demodulation reference signal ............................................................................................ ......................... 155.5.2.1 Demodulation reference signal for PUSCH............. ............................................................................... 155.5.2.1.1 Reference signal sequence ........................................................................................ ......................... 155.5.2.1.2 Mapping to physical resources .......................................................................... ................................ 165.5.2.2 Demodulation reference signal for PUCCH ........................................................................................... 165.5.2.2.1 Reference signal sequence ........................................................................................ ......................... 165.5.2.2.2 Mapping to physical resources .......................................................................... ................................ 175.5.3 Sounding reference signal ............................................................................................. ................................ 175.5.3.1 Sequence generation ............................................................................. ................................................... 175.5.3.2 Mapping to physical resources....................................................................................... ......................... 17
5.6 SC-FDMA baseband signal generation ..................................................................................................... ......... 185.7 Physical random access channel ............................................................................. ............................................ 185.7.1 Time and frequency structure .................................................................................. ..................................... 185.7.2 Preamble sequence generation ...................................................................................... ................................ 195.7.3 Baseband signal generation ........................................................................ ................................................... 195.8 Modulation and upconversion ......................................................................... ................................................... 20
6 Downlink................................................................................................................................................20 6.1 Overview ..................................................................................... ........................................................................ 206.1.1 Physical channels ....................................................................................... ................................................... 206.1.2 Physical signals .......................................................................................... ................................................... 216.2 Slot structure and physical resource elements......................................................................................... ........... 21
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6.2.1 Resource grid....................................................................................... .......................................................... 216.2.2 Resource elements ........................................................................ ................................................................. 216.2.3 Resource blocks................................................................................... .......................................................... 226.2.4 Guard Period for TDD Operation .............................................................................. ................................... 256.3 General structure for downlink physical channels .................................................................................... ......... 256.3.1 Scrambling.......................................................................................... ........................................................... 256.3.2 Modulation ............................................................................................ ........................................................ 26
6.3.3 Layer mapping.............................................................................................. ................................................. 266.3.3.1 Layer mapping for transmission on a single antenna port...................................................................... 266.3.3.2 Layer mapping for spatial multiplexing ................................................................................ .................. 266.3.3.3 Layer mapping for transmit diversity.................................................................................... .................. 276.3.4 Precoding ............................................................................................. .......................................................... 276.3.4.1 Precoding for transmission on a single antenna port .............................................................................. 276.3.4.2 Precoding for spatial multiplexing ........................................................................................ .................. 276.3.4.2.1 Precoding for zero and small-delay CDD ................................................................................ ......... 276.3.4.2.2 Precoding for large delay CDD ............................................................................. ............................ 286.3.4.2.3 Codebook for precoding ..................................................................... ............................................... 296.3.4.3 Precoding for transmit diversity ........................................................................... ................................... 306.3.5 Mapping to resource elements ..................................................................... ................................................. 316.4 Physical downlink shared channel .......................................................................... ............................................ 316.5 Physical multicast channel .................................................................................... .............................................. 316.6 Physical broadcast channel ..................................................................................... ............................................ 326.6.1 Scrambling.......................................................................................... ........................................................... 326.6.2 Modulation ............................................................................................ ........................................................ 326.6.3 Layer mapping and precoding............................................................. .......................................................... 326.6.4 Mapping to resource elements ..................................................................... ................................................. 326.7 Physical control format indicator channel ............................................................................................... ........... 326.7.1 Scrambling.......................................................................................... ........................................................... 336.7.2 Modulation ............................................................................................ ........................................................ 336.7.3 Layer mapping and precoding............................................................. .......................................................... 336.7.4 Mapping to resource elements ..................................................................... ................................................. 336.8 Physical downlink control channel .................................................................. ................................................... 336.8.1 PDCCH formats .............................................................................................. .............................................. 336.8.2 Scrambling.......................................................................................... ........................................................... 336.8.3 Modulation ............................................................................................ ........................................................ 346.8.4 Layer mapping and precoding............................................................. .......................................................... 346.8.5 Mapping to resource elements ..................................................................... ................................................. 346.9 Physical hybrid ARQ indicator channel ................................................................... .......................................... 346.9.1 Scrambling.......................................................................................... ........................................................... 346.9.2 Modulation ............................................................................................ ........................................................ 356.9.3 Layer mapping and precoding............................................................. .......................................................... 356.9.4 Mapping to resource elements ..................................................................... ................................................. 356.10 Reference signals ............................................................................................ .................................................... 356.10.1 Cell-specific reference signals ............................................................................... ....................................... 366.10.1.1 Sequence generation ............................................................................. ................................................... 366.10.1.1.1 Orthogonal sequence generation .............................................................................. ......................... 366.10.1.1.2 Pseudo-random sequence generation ....................................................................... ......................... 376.10.1.2 Mapping to resource elements............ ................................................................................... .................. 376.10.2 MBSFN reference signals ..................................................................... ........................................................ 416.10.2.1 Sequence generation ............................................................................. ................................................... 416.10.2.2 Mapping to resource elements............ ................................................................................... .................. 416.10.3 UE-specific reference signals............................................................................................... ......................... 436.10.3.1 Sequence generation ............................................................................. ................................................... 446.10.3.2 Mapping to resource elements............ ................................................................................... .................. 446.11 Synchronization signals ................................................................................ ...................................................... 446.11.1 Primary synchronization signal........... ...................................................................................... .................... 446.11.1.1 Sequence generation ............................................................................. ................................................... 446.11.1.2 Mapping to resource elements............ ................................................................................... .................. 446.11.2 Secondary synchronization signal.......................... ..................................................................... .................. 456.11.2.1 Sequence generation ............................................................................. ................................................... 456.11.2.2 Mapping to resource elements............ ................................................................................... .................. 456.12 OFDM baseband signal generation ........................................................................ ............................................ 45
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6.13 Modulation and upconversion ......................................................................... ................................................... 46
7 Modulation mapper ..................................... ............................................ ............................................. ..467.1 BPSK .................................................................................................. ................................................................. 467.2 QPSK.................................................................................................. ................................................................. 467.3 16QAM....................................................... ................................................................................................ ......... 477.4 64QAM....................................................... ................................................................................................ ......... 47
8 Timing....................................................................................................................................................49 8.1 Uplink-downlink frame timing ............................................................................... ............................................ 49
Annex A (informative): Change history .................................... ........................................ ...........................49
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Foreword
This Technical Specification has been produced by the 3rd
Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
1 Scope
The present document describes the physical channels for evolved UTRA.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (includinga GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 36.201: "LTE Physical Layer General Description ".
[3] 3GPP TS 36.212: "Multiplexing and channel coding".
[4] 3GPP TS 36.213: "Physical layer procedures".
[5] 3GPP TS 36.214: "Physical layer Measurements".
[6] 3GPP TS xx.xxx:
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3 Definitions, symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
),( lk Resource element with frequency-domain index kand time-domain index l
)(,plk
a Value of resource element ),( lk [for antenna port p ]
D Matrix for supporting cyclic delay diversity
0f Carrier frequency
PUSCHscM Scheduled bandwidth for uplink transmission, expressed as a number of subcarriers
(q)Mbit Number of coded bits to transmit on a physical channel [for code word q ]
(q)Msymb Number of modulation symbols to transmit on a physical channel [for code word q ]
layersymbM Number of modulation symbols to transmit per layer for a physical channel
apsymbM Number of modulation symbols to transmit per antenna port for a physical channel
N A constant equal to 2048 for kHz15=f and 4096 for kHz5.7=f lN ,CP Downlink cyclic prefix length for OFDM symbol l in a slot
GPN Number of OFDM symbols reserved for guard period for TDD with frame structure type 1
DLRBN Downlink bandwidth configuration, expressed in units of
RBscN
ULRBN Uplink bandwidth configuration, expressed in units of
RBscN
DLsymbN Number of OFDM symbols in a downlink slot
ULsymbN Number of SC-FDMA symbols in an uplink slot
RBscN Resource block size in the frequency domain, expressed as a number of subcarriers
OSN Number of orthogonal two-dimensional downlink reference signal sequences
PRSN Number of pseudo-random two-dimensional downlink reference signal sequences
PUCCHRSN Number of reference symbols per slot for PUCCH
TAN Timing offset between uplink and downlink radio frames at the UE, expressed in units of sT
PDCCHn Number of PDCCHs present in a subframe
PRBn Physical resource block number
P Number of antenna ports
p Antenna port number
q Code word number
OS,nmr Two-dimensional orthogonal sequence for reference signal generation
)(PRS, ir nm Two-dimensional pseudo-random sequence for reference signal generation in slot i
( )ts pl)(
Time-continuous baseband signal for antenna port p and OFDM symbol l in a slot
fT Radio frame duration
sT Basic time unit
slotT Slot duration
W Precoding matrix for downlink spatial multiplexing
PRACH Amplitude scaling for PRACH
PUCCH Amplitude scaling for PUCCH
PUSCH Amplitude scaling for PUSCH
SRS Amplitude scaling for sounding reference symbols
f Subcarrier spacing
RAf Subcarrier spacing for the random access preamble
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Number of transmission layers
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CCE Control Channel ElementCDD Cyclic Delay Diversity
PBCH Physical broadcast channel
PCFICH Physical control format indicator channelPDCCH Physical downlink control channel
PDSCH Physical downlink shared channel
PHICH Physical hybrid-ARQ indicator channel
PMCH Physical multicast channel
PRACH Physical random access channelPUCCH Physical uplink control channel
PUSCH Physical uplink shared channel
4 Frame structureThroughout this specification, unless otherwise noted, the size of various fields in the time domain is expressed as a
number of time units ( )2048150001s =T seconds.
Downlink and uplink transmissions are organized into radio frames with ms10307200 sf == TT duration. Two radio
frame structures are supported:
- Type 1, applicable to both FDD and TDD,
- Type 2, applicable to TDD only.
4.1 Frame structure type 1
Frame structure type 1 is applicable to both full duplex and half duplex FDD and to TDD. Each radio frame isms10307200 sf == TT long and consists of 20 slots of length ms5.0T15360 sslot ==T , numbered from 0 to 19. A
subframe is defined as two consecutive slots where subframe i consists of slots i2 and 12 +i .
For FDD, 10 subframes are available for downlink transmission and 10 subframes are available for uplink transmissionsin each 10 ms interval. Uplink and downlink transmissions are separated in the frequency domain.
For TDD, a subframe is either allocated to downlink or uplink transmission. Subframe 0 and subframe 5 are always
allocated for downlink transmission.
Figure 4.1-1: Frame structure type 1.
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4.2 Frame structure type 2
Frame structure type 2 is only applicable to TDD. Each radio frame consists of two half-frames of length
ms5153600 sf == TT each. The structure of each half-frame in a radio frame is identical. Each half-frame consists of
seven slots, numbered from 0 to 6, and three special fields, DwPTS, GP, and UpPTS. A subframe is defined as one slot
where subframe i consists of slot i .
Subframe 0 and DwPTS are always reserved for downlink transmission. UpPTS and subframe 1 are always reservedfor uplink transmission.
Figure 4.2-1: Frame structure type 2.
5 Uplink
5.1 Overview
The smallest resource unit for uplink transmissions is denoted a resource element and is defined in section 5.2.2.
5.1.1 Physical channels
An uplink physical channel corresponds to a set of resource elements carrying information originating from higher
layers and is the interface defined between 36.212 and 36.211. The following uplink physical channels are defined:
- Physical Uplink Shared Channel, PUSCH
- Physical Uplink Control Channel, PUCCH
- Physical Random Access Channel, PRACH
5.1.2 Physical signals
An uplink physical signal is used by the physical layer but does not carry information originating from higher layers.The following uplink physical signals are defined:
- reference signal
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5.2 Slot structure and physical resources
5.2.1 Resource grid
The transmitted signal in each slot is described by a resource grid ofRBsc
ULRBNN subcarriers and
ULsymbN SC-FDMA
symbols. The resource grid is illustrated in Figure 5.2.1-1. The quantity
UL
RBN
depends on the uplink transmissionbandwidth configured in the cell and shall fulfil
1106 ULRB N
The set of allowed values forULRBN is given by [6].
The number of SC-FDMA symbols in a slot depends on the cyclic prefix length configured by higher layers and isgiven in Table 5.2.3-1.
ULsymbN
slotT
0=l 1ULsymb = Nl
RB
sc
ULRB
N
N
RB
sc
N
RBsc
ULsymb NN
),( lk
Figure 5.2.1-1: Uplink resource grid.
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5.2.2 Resource elements
Each element in the resource grid is called a resource element and is uniquely defined by the index pair ( )lk, in a slot
where 1,...,0 RBscULRB = NNk and 1,...,0
ULsymb= Nl are the indices in the frequency and time domain, respectively.
Resource element ( )lk, corresponds to the complex value lka , . Quantities lka , corresponding to resource elements notused for transmission of a physical channel or a physical signal in a slot shall be set to zero.
5.2.3 Resource blocks
A resource block is defined as ULsymbN consecutive SC-FDMA symbols in the time domain andRBscN consecutive
subcarriers in the frequency domain, where ULsymbN andRBscN are given by Table 5.2.3-1. A resource block in the uplink
thus consists of RBscULsymb NN resource elements, corresponding to one slot in the time domain and 180 kHz in the
frequency domain.
Table 5.2.3-1: Resource block parameters.
ULsymbN
Configuration RBscN
Frame structure type 1 Frame stru cture type 2Normal cyclic prefix 12 7 9
Extended cyclic prefix 12 6 8
The relation between the resource block number PRBn and resource elements ),( lk in a slot is given by
=
RBsc
PRBN
kn
5.3 Physical uplink shared channel
The baseband signal representing the physical uplink shared channel is defined in terms of the following steps:
- scrambling
- modulation of scrambled bits to generate complex-valued symbols
- transform precoding to generate complex-valued modulation symbols
- mapping of complex-valued modulation symbols to resource elements
- generation of complex-valued time-domain SC-FDMA signal for each antenna port
Figure 5.3-1: Overview of uplink physical channel processing.
5.3.1 Scrambling
If scrambling is configured, the block of bits )1(),...,0( bitMbb , where bitM is the number of bits transmitted on the
physical uplink shared channel in one subframe, shall be scrambled with a UE-specific scrambling sequence prior to
modulation, resulting in a block of scrambled bits )1(),...,0( bitMcc .
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5.3.2 Modulation
The block of scrambled bits )1(),...,0( bitMcc shall be modulated as described in Section 7, resulting in a block of
complex-valued symbols )1(),...,0( symbMdd . Table 5.3.2-1 specifies the modulation mappings applicable for the
physical uplink shared channel.
Table 5.3.2-1: Uplink modulation schemesPhysical channel Modulation schemes
PUSCH QPSK, 16QAM, 64QAM
5.3.3 Transform precoding
The block of complex-valued symbols )1(),...,0( symbMdd is divided intoPUSCHscsymb MM sets, each corresponding
to one SC-FDMA symbol. Transform precoding shall be applied according to
1,...,0
1,...,0
)()(
PUSCHscsymb
PUSCHsc
1
0
2
PUSCHsc
PUSCHsc
PUSCHsc PUSCH
sc
=
=
+=+
=
MMl
Mk
eiMldkMlz
M
i
M
ikj
resulting in a block of complex-valued modulation symbols )1(),...,0( symbMzz . The variablePUSCHscM represents the
number of scheduled subcarriers used for PUSCH transmission in an SC-FDMA symbol and shall fulfil
ULRB
RBsc
RBsc
PUSCHsc
532 532 NNNM =
where 532 ,, is a set of non-negative integers.
5.3.4 Mapping to physical resources
The block of complex-valued symbols )1(),...,0( symbMzz shall be multiplied with the amplitude scaling factor
PUSCH and mapped in sequence starting with )0(z to resource blocks assigned for transmission of PUSCH. The
mapping to resource elements ( )lk, not used for transmission of reference signals shall be in increasing order of firstthe index l , then the slot number and finally the index k. The index kis given by
( ) ( ) 1,..., PUSCHschop0hop0 +++= Mfkfkk
where ( )hopf denotes the frequency-hopping pattern and 0k is given by the scheduling decision.
5.4 Physical uplink control channel
The physical uplink control channel, PUCCH, carries uplink control information. The PUCCH is never transmittedsimultaneously with the PUSCH.
The physical uplink control channel supports multiple formats as shown in Table 5.4-1.
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Table 5.4-1: Supported PUCCH formats.
Number of bits per subframe, bitM PUCCHformat
Modulationscheme
Normal cyclic prefix Extended cyclic prefix
0 BPSK 1 1
1 QPSK 2 2
2 QPSK 20 20
5.4.1 Scrambling
If scrambling is configured, the block of bits )1(),...,0( bitMbb , where bitM is the number of bits transmitted on the
physical uplink control channel in one subframe, shall be scrambled with a UE-specific scrambling sequence prior to
modulation, resulting in a block of scrambled bits )1(),...,0( bitMcc .
5.4.2 Modulation
The block of scrambled bits )1(),...,0( bitMcc shall be modulated as described in Section 7, resulting in a block of
complex-valued symbols )1(),...,0( symbMdd . The modulation scheme for the different PUCCH formats is given by
Table 5.4-1. For BPSK, bitsymb MM = , while for QPSK 2bitsymb MM = .
5.4.2.1 Sequence modulation for PUCCH format 0 and 1
For PUCCH format 0 and 1, the complex-valued symbol )0(d shall be multiplied with a cyclically shifted length
12PUCCHseq =N sequence generated according to section 5.5.1 with
PUCCHseq
RSsc NM = , resulting in a block of complex-
valued symbols )1(),...,0( PUCCHseq Nyy . Note that different cyclic shifts of the sequence can be used in different
PUCCH SC-FDMA symbols within a slot.
The block of complex-valued symbols )1(),...,0( PUCCHseq Nyy shall be block-wise spread with the orthogonal sequence
)(iw according to
( ) ( )nymwnNmNNmz =++ )(' PUCCHseqPUCCHseqPUCCHSF where
=
=
=
2typestructureframefor0
1typestructureframefor1,0'
1,...,0
1,...,0
PUCCHseq
PUCCHSF
m
Nn
Nm
The sequence )(iw and PUCCHSFN are given by Table 5.4.2.1-1.
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Table 5.4.2.1-1: Orthogonal sequences [ ])1()0( PUCCHSF Nww L for PUCCH format 0 and 1
Sequence index Frame stru cture type 1 Frame stru cture type 2
4PUCCHSF =N
0 [ ]1111 ++++
1 [ ]1111 ++ 2 [ ]1111 ++
3 [ ]1111 ++
5.4.2.2 Sequence modulation for PUCCH format 2
For PUCCH format 2, each complex-valued symbol )(id shall be multiplied with a cyclically shifted length
12PUCCHseq =N sequence generated according to section 5.5.1 with
PUCCHseq
RSsc NM = , resulting in a block of complex-
valued symbols )1(),...,0( symbPUCCHseq MNzz .
5.4.3 Mapping to physical resources
The block of complex-valued symbols )(iz shall be multiplied with the amplitude scaling factor PUCCH and mapped
in sequence starting with )0(z to resource elements assigned for transmission of PUCCH. The mapping to resource
elements ( )lk, not used for transmission of reference signals shall start with the first slot in the subframe. The set ofvalues for index kshall be different in the first and second slot of the subframe, resulting in frequency hopping at the
slot boundary. Mapping of modulation symbols for the physical uplink control channel is illustrated in Figure 5.4.3-1.
frequency
1 ms subframe
resource i
resource i
resourcej
resourcej
Figure 5.4.3-1: Physical uplink control channel
5.5 Reference signals
Two types of uplink reference signals are supported:
- demodulation reference signal, associated with transmission of PUSCH or PUCCH
- sounding reference signal, not associated with transmission of PUSCH or PUCCH
The same set of base sequences is used for demodulation and sounding reference signals.
5.5.1 Generation of the base reference signal sequence
The definition of the base sequence )1(),...,0(RSsc Mrr of length
RSscM depends on the sequence length.
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5.5.1.1 Reference signal sequences of length 36 or larger
For 36RSsc M , the sequence )1(),...,0(
RSsc Mrr is given by
RSsc
RSZC 0),mod)(()( MnNnxenr u
nj
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5.5.2.1.2 Mapping to physical resources
The sequence ( )PUSCHr shall be multiplied with the amplitude scaling factor PUSCH and mapped in sequence starting
with )0(PUSCH
r to the same set of resource blocks used for the corresponding PUSCH transmission defined in Section
5.3.4. The mapping to resource elements ),( lk in the subframe shall be in increasing order of first k, then the slot
number. For frame structure type 1 3=l and for frame structure type 2 4=l .
For frame structure type 2, an additional demodulation reference signal per subframe can be configured.
5.5.2.2 Demodulation reference signal for PUCCH
5.5.2.2.1 Reference signal sequence
The demodulation reference signal sequence ( )PUCCHr for PUCCH is defined by
( ) ( ),)(' RSscRSscPUCCHRSPUCCH nrmwnMmMNmr =++ where
=
==
2typestructureframefor0
1typestructureframefor1,0'
1,...,01,...,0
RSsc
PUCCH
RS
m
Mn
Nm
The sequence )(nr is given by Section 5.5.1 with. 12RSsc =M . The number of reference symbols per slot
PUCCHRSN and
the sequence )(nw are given by Table 5.5.2.2.1-1 and 5.5.2.2.1-2, respectively. Note that different cyclic shifts can
be used for different reference symbols within a slot. For PUCCH format 0 and 1, different orthogonal sequences can be
used for different slots.
Table 5.5.2.2.1-1: Number of PUCCH demodulation reference symbols per slo tPUCCH
RSN .
Frame structure type 1 Frame structure type 2PUCCH format Normal cyclic
prefixExtended cyclic
prefixNormal cyclic
prefixExtended cyc lic
prefix
0
13 2
2 2 1
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Table 5.5.2.2.1-2: Orthogonal sequences [ ])1()0( PUCCHRS Nww L fo r PUCCH format 0 and 1.
Frame structur e type 1 Frame structure type 2Sequence index Normal cyclic
prefixExtended cyclic
prefixNormal cycl ic
prefixExtended cyclic
prefix
0 [ ]111 [ ]11
1 [ ]34321 jj ee [ ]11 2 [ ]32341 jj ee N/A
Table 5.5.2.2.1-3: Orthogonal sequences [ ])1()0( PUCCHRS Nww L fo r PUCCH format 2.
Frame structure type 1 Frame structure type 2
Normal cyclic prefix Extended cyclic prefix Normal cyclic prefix Extended cyclic prefix
[ ]11 [ ]1
5.5.2.2.2 Mapping to physical resources
The sequence ( )PUCCHr shall be multiplied with the amplitude scaling factor PUCCH and mapped in sequence starting
with )0(PUCCH
r to resource elements ),( lk . The mapping shall be in increasing order of first k, then l and finally the
slot number. The same set of values for kas for the corresponding PUCCH transmission shall be used. The values of
the symbol index l in a slot are given by Table 5.5.2.2.2-1.
Table 5.5.2.2.2-1: Demodulation reference signal location for different PUCCH formats
Set of values for l
Frame structure type 1 Frame structu re type 2PUCCHFormat
Normal cyclic prefix Extended cyclic prefix Normal cyclic prefix Extended cyclic prefix
0
1
2, 3, 4 2, 3
2 1, 5 3
5.5.3 Sounding reference signal
5.5.3.1 Sequence generation
The sounding reference signal sequence ( )SRSr is defined by Section 5.5.1. The sequence index to use is derived fromthe PUCCH base sequence index.
5.5.3.2 Mapping to physical resources
The sequence )1(),...,0(RSsc
SRSSRS Mrr shall be multiplied with the amplitude scaling factor SRS and mapped in
sequence starting with )0(SRS
r to resource elements ),( lk according to
=
=+otherwise0
1,...,1,0)( RSscSRS
SRS,2 0
Mkkra lkk
where 0k is the frequency-domain starting position of the sounding reference signal andRS
scM is the length of the
sounding reference signal sequence.
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For frame structure type 1, the timing of the random access burst depends on the PRACH configuration. Table 5.7.1-2
lists the subframes in which random access burst transmission is possible.
Table 5.7.1-2: Random access burs t timing for frame struc ture type 1.
PRACH conf iguratio n Subframes
For frame structure type 2, the start of the random access burst depends on the burst format configured. For burst format
0, the burst shall start s5120T before the end of the UpPTS at the UE. For burst format 1, the start of the random access
burst shall be aligned with the start of an uplink subframe.
In the frequency domain, the random access burst occupies a bandwidth corresponding to 6 resource blocks for bothframe structures.
5.7.2 Preamble sequence generation
The random access preambles are generated from Zadoff-Chu sequences with zero correlation zone, generated from one
or several root Zadoff-Chu sequences. The network configures the set of preamble sequences the UE is allowed to use.
Theth
u root Zadoff-Chu sequence is defined by
( ) 10, ZC
)1(
ZC =
+
Nnenx N
nunj
u
where the length ZCN of the Zadoff-Chu sequence is given by Table 5.7.2-1. From theth
u root Zadoff-Chu sequence,
random access preambles with zero correlation zone are defined by cyclic shifts of multiples of CSN according to
)mod)(()( ZCCS, NvNnxnx uvu +=
where CSN is given by Table 5.7.2-1.
Table 5.7.2-1: Random access preamble sequence parameters.
Frame structure Burst format ZCN CSN Number of preambles Preamble sequences per cell
Type 1 0 3 839 64
0 139 552Type 2
1 55716
5.7.3 Baseband signal generation
The time-continuous random access signal )(ts is defined by
( ) ( )( ) ( )
=
+++
=
=
1
0
21
0
2
,PRACH
ZC
CPRA2
1
0
ZC
ZC)(
N
k
TtfkKkjN
n
N
nkj
vu eenxts
where CPPRE0 TTt +
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Table 5.7.3-1: Random access baseband parameters.
Frame structure Burst format RAf
Type 1 0 3 1250 Hz 12
0 7500 Hz 2Type 2
1 1875 Hz 9
5.8 Modulation and upconversion
Modulation and upconversion to the carrier frequency of the complex-valued SC-FDMA baseband signal for each
antenna port is shown in Figure 5.8-1. The filtering required prior to transmission is defined by the requirements in [6].
{ })(Re tsl
{ })(Im tsl
( )tf02cos
( )tf02sin
)(tsl
Figure 5.8-1: Uplink modulation.
6 Downlink
6.1 Overview
The smallest time-frequency unit for downlink transmission is denoted a resource element and is defined in
Section 6.2.2.
6.1.1 Physical channels
A downlink physical channel corresponds to a set of resource elements carrying information originating from higher
layers and is the interface defined between 36.212 and 36.211. The following downlink physical channels are defined:
- Physical Downlink Shared Channel, PDSCH
- Physical Broadcast Channel, PBCH
- Physical Multicast Channel, PMCH
- Physical Control Format Indicator Channel, PCFICH
- Physical Downlink Control Channel, PDCCH
- Physical Hybrid ARQ Indicator Channel, PHICH
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DL
symbN
slotT
0=l 1DLsymb =Nl
RB
sc
DLRB
N
N
RB
sc
N
RBsc
DLsymb NN
),( lk
Figure 6.2.2-1: Downlink resource grid.
6.2.3 Resource blocks
Physical and virtual resource blocks are defined.
A physical resource block is defined asDLsymbN consecutive OFDM symbols in the time domain and
RBscN consecutive
subcarriers in the frequency domain, where DLsymbN andRBscN are given by Table 6.2.3-1. A physical resource block thus
consists of RBscDLsymb NN resource elements, corresponding to one slot in the time domain and 180 kHz in the frequency
domain.
The relation between physical resource blocks and resource elements depends onDLRBN and the subframe number. The
relation between the physical resource block number PRBn and resource elements ),( lk in a slot is given by
=
RBsc
PRBN
kn
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6.2.4 Guard Period for TDD Operation
For TDD operation with frame structure type 1, the last GPN downlink OFDM symbol(s) in a subframe immediately
preceding a downlink-to-uplink switch point can be reserved for guard time and consequently not transmitted. Thesupported guard periods are listed in Table 6.2.4-1.
Table 6.2.4-1: Guard periods for TDD operation with frame structure type 1.
Supported guard periods in OFDM symbolsConfiguration
Subframe 0 Subframe 5 All other subf rames
Normal cyclic prefix kHz15=f 0, 1, 2, 3, 4, 5 0, 1, 2, 3, 4, 5 0, 1, 2, 3, 4, 5, 12
Extended cyclic prefix kHz15=f 0, 1, 2, 3 0, 1, 2, 3, 4 0, 1, 2, 3, 4, 10
For frame structure type 2, the GP field in Figure 4.2-1 serves as a guard period. Longer guard periods can be obtainedby not using UpPTS and subframe 1 for transmission.
6.3 General structure for downlink physical channels
This section describes a general structure, applicable to more than one physical channel.
The baseband signal representing a downlink physical channel is defined in terms of the following steps:
- scrambling of coded bits in each of the code words to be transmitted on a physical channel
- modulation of scrambled bits to generate complex-valued modulation symbols
- mapping of the complex-valued modulation symbols onto one or several transmission layers
- precoding of the complex-valued modulation symbols on each layer for transmission on the antenna ports
- mapping of complex-valued modulation symbols for each antenna port to resource elements
- generation of complex-valued time-domain OFDM signal for each antenna port
Figure 6.3-1: Overview of physical channel processing.
6.3.1 Scrambling
For each code word q , the block of bits )1(),...,0()(
bit)()( qqq Mbb , where )(bit
qM is the number of bits in code word q
transmitted on the physical channel in one subframe, shall be scrambled prior to modulation, resulting in a block of
scrambled bits )1(),...,0((q)
bit)()( Mcc qq . Up to two code words can be transmitted in one subframe, i.e., { }1,0q .
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6.3.2 Modulation
For each code word q , the block of scrambled bits )1(),...,0((q)
bit)()( Mcc qq shall be modulated as described in
Section 7 using one of the modulation schemes in Table 6.3.2-1, resulting in a block of complex-valued modulation
symbols )1(),...,0((q)symb
)()( Mdd qq .
Table 6.3.2-1: Modulation schemes
Physical channel Modulation schemes
PDSCH QPSK, 16QAM, 64QAM
PMCH QPSK, 16QAM, 64QAM
6.3.3 Layer mapping
The complex-valued modulation symbols for each of the code words to be transmitted are mapped onto one or several
layers. Complex-valued modulation symbols )1(),...,0((q)symb
)()( Mdd qq for code word q shall be mapped onto the
layers [ ]Tixixix )(...)()( )1()0( = , 1,...,1,0 layersymb= Mi where is the number of layers and layersymbM is the number of
modulation symbols per layer.
6.3.3.1 Layer mapping for transmission on a single antenna port
For transmission on a single antenna port, a single layer is used, 1= , and the mapping is defined by
)()()0()0( idix =
with(0)symb
layersymb MM = .
6.3.3.2 Layer mapping for spatial multiplexing
For spatial multiplexing, the layer mapping shall be done according to Table 6.3.3.2-1. The number of layers is less
than or equal to the number of antenna ports P used for transmission of the physical channel.
Table 6.3.3.2-1: Codeword-to-layer mapping for spatial multip lexing
Number of layers Number of codewords
Codeword-to-layer mapping
1,...,1,0layersymb= Mi
1 1 )()( )0()0( idix = )0(
symblayersymb MM =
)()()0()0(
idix = 2 2
)()()1()1(
idix =
)1(symb
)0(symb
layersymb MMM ==
)()( )0()0( idix =
3 2
)12()(
)2()(
)1()2(
)1()1(
+=
=
idix
idix
2)1(
symb)0(
symblayersymb MMM ==
)12()(
)2()()0()1(
)0()0(
+=
=
idix
idix
4 2
)12()(
)2()()1()3(
)1()2(
+=
=
idix
idix
22)1(
symb)0(
symblayersymb MMM ==
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6.3.3.3 Layer mapping for transmit diversity
For transmit diversity, the layer mapping shall be done according to Table 6.3.3.3-1. There is only one codeword and
the number of layers is equal to the number of antenna ports P used for transmission of the physical channel.
Table 6.3.3.3-1: Codeword-to-layer mapping for transmit di versity
Number of layers Number of codewords
Codeword-to-layer mapping
1,...,1,0layersymb= Mi
2 1 )12()(
)2()(
)0()1(
)0()0(
+=
=
idix
idix
2)0(
symblayersymb MM =
4 1
)34()(
)24()(
)14()(
)4()(
)0()3(
)0()2(
)0()1(
)0()0(
+=
+=
+=
=
idix
idix
idix
idix
4
)0(symb
layersymb MM =
6.3.4 Precoding
The precoder takes as input a block of vectors [ ]Tixixix )(...)()( )1()0( = , 1,...,1,0 layersymb= Mi from the layer
mapping and generates a block of vectors [ ]Tp iyiy ...)(...)( )(= , 1,...,1,0 apsymb= Mi to be mapped onto resources oneach of the antenna ports, where )()( iy p represents the signal for antenna port p .
6.3.4.1 Precoding for transmission on a single antenna port
For transmission on a single antenna port, precoding is defined by
)()()0()(
ixiy p
=
where { }5,4,0p is the number of the single antenna port used for transmission of the physical channel and
1,...,1,0apsymb= Mi ,
layersymb
apsymb MM = .
6.3.4.2 Precoding for spatial multiplexing
Precoding for spatial multiplexing is only used in combination with layer mapping for spatial multiplexing as described
in Section 6.3.3.2. Spatial multiplexing supports two or four antenna ports and the set of antenna ports used is
{ }1,0p or { }3,2,1,0p , respectively.
6.3.4.2.1 Precoding for zero and small-delay CDD
For zero-delay and small-delay cyclic delay diversity (CDD), precoding for spatial multiplexing is defined by
=
)(
)(
)()(
)(
)(
)1(
)0(
)1(
)0(
ix
ix
iWkD
iy
iy
i
P
MM
where the precoding matrix )(iW is of size P , the quantity )( ikD is a diagonal matrix for support of cyclic delay
diversity, ik represents the frequency-domain index of the resource element to which modulation symbol i is mapped
to and 1,...,1,0apsymb= Mi ,
layersymb
apsymb MM = .
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The matrix )( ikD shall be selected from Table 6.3.4.2.1-1, where a UE-specific value of is semi-statically
configured in the UE and the eNodeB by higher layer signalling. The quantity in Table 6.3.4.2.1-1 is the smallest
number from the set { }2048,1024,512,256,128 such that RBscDLRBNN .
Table 6.3.4.2.1-1: Zero and small delay cycl ic delay diversit y.
Set ofantenna
ports used
Number of layers )( i
kD NoCDD
Smalldelay
1{ }1,0
2
ikje
20
01 0 2
1
2
3{ }3,2,1,0
4
32
22
2
000
000
000
0001
i
i
i
kj
kj
kj
e
e
e 0 1
For spatial multiplexing, the values of )(iW shall be selected among the precoder elements in the codebook configured
in the eNodeB and the UE. The eNodeB can further confine the precoder selection in the UE to a subset of the elementsin the codebook using codebook subset restrictions. The configured codebook shall be selected from Table 6.3.4.2.3-1
or 6.3.4.2.3-2.
6.3.4.2.2 Precoding for large delay CDD
For large-delay CDD, precoding for spatial multiplexing is defined by
=
)(
)(
)()(
)(
)(
)1(
)0(
)1(
)0(
ix
ix
UiDiW
iy
iy
P
MM
where the precoding matrix )(iW is of size P and 1,...,1,0 apsymb= Mi ,layersymb
apsymb MM = . The diagonal size-
matrix )(iD supporting cyclic delay diversity and the size- matrix U are both given by Table 6.3.4.2.2-1 for
different numbers of layers .
The values of the precoding matrix )(iW shall be selected among the precoder elements in the codebook configured in
the eNodeB and the UE. The eNodeB can further confine the precoder selection in the UE to a subset of the elements inthe codebook using codebook subset restriction. The configured codebook shall be selected from Table 6.3.4.2.3-1 or
6.3.4.2.3-2.
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Table 6.3.4.2.2-1: Large-delay cycl ic delay diversity
Number oflayers
U )(iD
1 [ ]1 [ ]1
2
221
11je
220
01ije
3
3834
3432
1
1
111
jj
jj
ee
ee
34
32
00
00
001
ij
ij
e
e
4
41841246
4124844
464442
1
1
1
1111
jjj
jjj
jjj
eee
eee
eee
46
44
42
000
000
000
0001
ij
ij
ij
e
e
e
6.3.4.2.3 Codebook for precoding
For transmission on two antenna ports, { }1,0p , the precoding matrix )(iW for zero, small, and large-delay CDD shallbe selected from Table 6.3.4.2.3-1 or a subset thereof.
Table 6.3.4.2.3-1: Codebook for transmission on antenna por ts { }1,0 .
Codebookindex
Number of layers
1 2
0
0
1
10
01
2
1
1
1
0
11
11
2
1
2
11
21
jj11
21
3
1
1
2
1 -
4
j
1
2
1 -
5
j
1
2
1 -
For transmission on four antenna ports, { }3,2,1,0p , the precoding matrix W for zero, small, and large-delay CDD
shall be selected from Table 6.3.4.2.3-2 or a subset thereof. The quantity}{s
nW denotes the matrix defined by the
columns given by the set }{s from the expression nHn
Hnnn uuuuIW 2= where I is the 44 identity matrix and the
vector nu is given by Table 6.3.4.2.3-2.
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Table 6.3.4.2.3-2: Codebook for transmiss ion on antenna ports { }3,2,1,0 .
Codebookindex
nu Number of layers
1 2 3 4
0 [ ]Tu 11110 = }1{
0W 2}14{
0W 3}124{
0W 2}1234{
0W
1 [ ]Tjju 111 = }1{
1W 2}12{
1
W 3}123{
1
W 2}1234{
1W
2 [ ]Tu 11112 = }1{
2W 2}12{
2W 3}123{
2W 2}3214{
2W
3 [ ]Tjju = 113 }1{
3W 2}12{
3W 3}123{
3W 2}3214{
3W
4 [ ]Tjjju 2)1(2)1(14 = }1{4W 2}14{4W 3}124{4W 2}1234{4W 5 [ ]Tjjju 2)1(2)1(15 = }1{5W 2}14{5W 3}124{5W 2}1234{5W 6 [ ]Tjjju 2)1(2)1(16 ++=
}1{6W 2
}13{6W 3
}134{6W 2
}1324{6W
7 [ ]Tjjju 2)1(2)1(17 ++= }1{
7W 2}13{
7W 3}134{
7W 2}1324{
7W
8 [ ]Tu 11118 = }1{
8W 2}12{
8W 3}124{
8W 2}1234{
8W
9 [ ]Tjju = 119 }1{
9W 2}14{
9W 3}134{
9W 2}1234{
9W
10 [ ]Tu 111110 = }1{
10W 2}13{
10W 3}123{
10W 2}1324{
10W
11 [ ]Tjju 1111 = }1{
11W 2}13{
11W 3}134{
11W 2}1324{
11W
12 [ ]Tu 111112 = }1{
12W 2}12{
12W 3}123{
12W 2}1234{
12W
13 [ ]Tu 111113 = }1{
13W 2}13{
13W 3}123{
13W 2}1324{
13W
14 [ ]Tu 111114 = }1{
14W 2}13{
14W 3}123{
14W 2}3214{
14W
15 [ ]Tu 111115= }1{
15W 2}12{
15W 3}123{
15W 2}1234{
15W
6.3.4.3 Precoding for transmit diversity
Precoding for transmit diversity is only used in combination with layer mapping for transmit diversity as described inSection 6.3.3.3. The precoding operation for transmit diversity is defined for two and four antenna ports.
For transmission on two antenna ports, { }1,0p , the output [ ]Tiyiyiy )()()( )1()0(= of the precoding operation isdefined by
( )( )( )( )
=
+
+
)(Im
)(Im
)(Re
)(Re
001
010
010
001
)12(
)12(
)2(
)2(
)1(
)0(
)1(
)0(
)1(
)0(
)1(
)0(
ix
ix
ix
ix
j
j
j
j
iy
iy
iy
iy
for 1,...,1,0layersymb= Mi with
layersymb
apsymb 2MM = .
For transmission on four antenna ports, { }3,2,1,0p , the output [ ]Tiyiyiyiyiy )()()()()( )3()2()1()0(= of theprecoding operation is defined by
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6.6 Physical broadcast channel
6.6.1 Scrambling
The block of bits )1(),...,0( bitMbb , where bitM is the number of bits transmitted on the physical broadcast channel,
shall be scrambled prior to modulation, resulting in a block of scrambled bits ( ) ( )1,...,0 bitMcc .
6.6.2 Modulation
The block of scrambled bits ( ) ( )1,...,0 bitMcc shall be modulated as described in Section 7, resulting in a block ofcomplex-valued modulation symbols )1(),...,0( symbMdd . Table 6.6.2-1 specifies the modulation mappings applicable
for the physical broadcast channel.
Table 6.6.2-1: PBCH modulation schemes
Physical channel Modulation schemes
PBCH QPSK
6.6.3 Layer mapping and precoding
The block of modulation symbols )1(),...,0( symbMdd shall be mapped to layers according to one of Sections 6.3.3.1
or 6.3.3.3 with symb)0(
symb MM = and precoded according to one of Sections 6.3.4.1 or 6.3.4.3, resulting in a block of
vectors [ ]TP iyiyiy )(...)()( )1()0( = , 1,...,0 symb= Mi , where )()( iy p represents the signal for antenna port p andwhere 1,...,0 = Pp and the number of antenna ports { }4,2,1P .
6.6.4 Mapping to resource elements
The block of complex-valued symbols )1(),...,0( symb)()( Myy pp for each antenna port is transmitted during 4
consecutive radio frames and shall be mapped in sequence starting with )0(y to physical resource blocks number
32)1(DLRB N to 22)1(
DLRB +N in case
DL
RBN is an odd number and 32DLRB N to 22
DLRB +N in case
DLRBN is an
even number. The mapping to resource elements ( )lk, not reserved for transmission of reference signals shall be inincreasing order of first the index k, then the index l in subframe 0, then the slot number and finally the radio frame
number. For frame structure type 2, only subframe 0 in the first half-frame of a radio frame is used for PBCH
transmission. The set of values of the index l to be used in subframe 0 in each of the four radio frames during which
the physical broadcast channel is transmitted is given by Table 6.6.4-1.
Table 6.6.4-1: Index value l for the PBCH
Values of index l Configuration
Frame structu re type 1 Frame structure type 2
3, 4 in slot 0 of subframe 0Normal cyclic prefix kHz15=f 0, 1 in slot 1 of subframe 0 3, 4, 5, 6
In subframe 0 in the first half-frame of a radio frame
3 in slot 0 of subframe 0Extended cyclic prefix kHz15=f
0, 1, 2 in slot 1 of subframe 03, 4, 5, 6
In subframe 0 in the first half-frame of a radio frame
6.7 Physical control format indicator channel
The physical control format indicator channel carries information about the number of OFDM symbols (1, 2 or 3) usedfor transmission of PDCCHs in a subframe.
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6.7.1 Scrambling
The block of bits )31(),...,0( bb transmitted in one subframe shall be scrambled prior to modulation, resulting in a block
of scrambled bits )31(),...,0( cc . The scrambling sequence is uniquely defined by the physical-layer cell identity.
6.7.2 Modulation
The block of scrambled bits )31(),...,0( cc shall be modulated as described in Section 7, resulting in a block of complex-
valued modulation symbols )15(),...,0( dd . Table 6.7.2-1 specifies the modulation mappings applicable for the physical
control format indicator channel.
Table 6.7.2-1: PCFICH modulation schemes
Physical channel Modulation schemes
PCFICH QPSK
6.7.3 Layer mapping and precoding
The block of modulation symbols )15(),...,0( dd shall be mapped to layers according to one of Sections 6.3.3.1 or6.3.3.3 with symb
)0(symb MM = and precoded according to one of Sections 6.3.4.1 or 6.3.4.3, resulting in a block of
vectors [ ]TP iyiyiy )(...)()( )1()0( = , 15,...,0=i , where )()( iy p represents the signal for antenna port p and where1,...,0 = Pp and the number of antenna ports { }4,2,1P .
6.7.4 Mapping to resource elements
For transmission on two or four antenna ports, the block of vectors [ ]TP iyiyiy )(...)()( )1()0( = , 15,...,0=i shall bemapped in a cell-specific way to four groups of four contiguous physical resource elements excluding reference
symbols in the first OFDM symbol in a downlink subframe.
6.8 Physical downlink control channel
6.8.1 PDCCH formats
The physical downlink control channel carries scheduling assignments and other control information. A physical control
channel is transmitted on an aggregation of one or several control channel elements (CCEs), where a control channel
element corresponds to a set of resource elements. Multiple PDCCHs can be transmitted in a subframe.
The PDCCH supports multiple formats as listed in Table 6.8.1-1.
Table 6.8.1-1: Supported PDCCH formats
PDCCH format Number of CCEs Number of PDCCH bits
0 11 2
2 4
3 8
6.8.2 Scrambling
The block of bits )1(),...,0((i)
bit)()( Mbb ii on each of the control channels to be transmitted in a subframe, where (i)bitM is
the number of bits in one subframe to be transmitted on physical downlink control channel number i , shall be
multiplexed, resulting in a block of
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bits )1(),...,0(),...,1(),...,0(),1(),...,0(1)-(
bit)1()1((1)
bit)1()1((0)
bit)0()0( PDCCHPDCCHPDCCH nnn MbbMbbMbb , where PDCCHn is the
number of PDCCHs transmitted in the subframe.
The block of bits )1(),...,0(),...,1(),...,0(),1(),...,0(1)-(
bit)1()1((1)
bit)1()1((0)
bit)0()0( PDCCHPDCCHPDCCH nnn MbbMbbMbb shall be
scrambled prior to modulation, resulting in a block of scrambled bits )1(),...,0( totMcc where
==
1
0
)(bittot
PDCCHn
i
iMM .
6.8.3 Modulation
The block of scrambled bits )1(),...,0( totMcc shall be modulated as described in Section 7, resulting in a block of
complex-valued modulation symbols )1(),...,0( symbMdd . Table 6.8.3-1 specifies the modulation mappings applicable
for the physical downlink control channel.
Table 6.8.3-1: PDCCH modulation schemes
Physical channel Modulation schemes
PDCCH QPSK
6.8.4 Layer mapping and precodingThe block of modulation symbols )1(),...,0( symbMdd shall be mapped to layers according to one of Sections 6.3.3.1
or 6.3.3.3 with symb)0(
symb MM = and precoded according to one of Sections 6.3.4.1 or 6.3.4.3, resulting in a block of
vectors [ ]TP iyiyiy )(...)()( )1()0( = , 1,...,0 symb= Mi to be mapped onto resources on the antenna ports used fortransmission, where )(
)(iy
prepresents the signal for antenna port p .
6.8.5 Mapping to resource elements
The block of complex-valued symbols )1(),...,0( symb)()( Myy pp for each antenna port used for transmission shall be
permuted in groups of four symbols, resulting in a block of complex-valued symbols )1(),...,0( symb)()(
Mzz pp
.
The block of complex-valued symbols )1(),...,0( symb)()( Mzz pp shall be cyclically shifted by CSS4N symbols,
resulting in the sequence )1(),...,0( symb)()( Mww pp where ( ) ( )symbCSS)()( mod)4( MNiziw pp += .
The block of complex-valued symbols )1(),...,0( symb)()( Mww pp shall be mapped in sequence starting with )0()(pw
to resource elements corresponding to the physical control channels. The mapping to resource elements ( )lk, onantenna port p not used for reference signals, PHICH or PCFICH shall be in increasing order of first the index kand
then the index l , where 1,...,0 = Ll and 3L corresponds to the value transmitted on the PCFICH. In case of the
PDCCHs being transmitted using antenna port 0 only, the mapping operation shall assume reference signals
corresponding to antenna port 0 and antenna port 1 being present, otherwise the mapping operation shall assume
reference signals being present corresponding to the actual antenna ports used for transmission of the PDCCH.
6.9 Physical hybrid ARQ indicator channel
The PHICH carries the hybrid-ARQ ACK/NAK.
6.9.1 Scrambling
The block of bits )1(),...,0( bitMbb transmitted in one subframe shall be scrambled prior to modulation, resulting in a
block of scrambled bits )1(),...,0( bitMcc .
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6.9.2 Modulation
For transmission on one or two antenna ports, the block of scrambled bits )1(),...,0( bitMcc shall be bit-wise
multiplied with an orthogonal sequence according to
)()()(PHICHSF icmwmNiz =+
where
1,...,0
1,...,0
bit
PHICHSF
=
=
Mi
Nm
The sequence [ ])1()0( PHICHSF Nww L is given by Table 6.9.2-1.
Table 6.9.2-1: Orthogonal sequences [ ])1()0( PHICHSF Nww L for PHICH
Sequence index Orthogonal sequence
4PHICHSF =N
0
12
3
The block of bits )(iz shall be modulated as described in Section 7, resulting in a block of complex-valued modulation
symbols )1(),...,0( symbMdd . Table 6.9.2-2 specifies the modulation mappings applicable for the physical hybrid
ARQ indicator channel.
Table 6.9.2-2: PHICH modulation schemes
Physical channel Modulation schemes
PHICH
6.9.3 Layer mapping and precoding
For transmission on one or two antenna ports, the block of modulation symbols )1(),...,0( symbMdd shall be mapped
to layers according to one of Sections 6.3.3.1 or 6.3.3.3 with symb)0(
symb MM = and precoded according to one of
Sections 6.3.4.1 or 6.3.4.3, resulting in a block of vectors [ ]TP iyiyiy )(...)()( )1()0( = , 1,...,0 symb= Mi , where)(
)(iy p represents the signal for antenna port p and where 1,...,0 = Pp and the number of antenna ports { }4,2,1P .
6.9.4 Mapping to resource elements
The block of complex-valued symbols )1(),...,0( symb)()(
Myy pp
for each of the antenna ports used for transmissionshall be mapped to three groups of four contiguous physical resource elements not used for reference signals and
PCFICH. In case multiple PHICHes are mapped to the same resource elements, these PHICHes shall be summed priorto the mapping. Higher layers can configure the PHICH to span the first or the first three OFDM symbols in a subframe.
The value configured puts a lower limit on the size of the control region signalled by the PCFICH. If the PHICH is
configured to span three OFDM symbols, there is one group of four resource elements in each of the three OFDMsymbols.
6.10 Reference signals
Three types of downlink reference signals are defined:
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Figures 6.10.1.2-1, 6.10.1.2-2, and 6.10.1.2-3 and 6.10.1.2-4 illustrate the resource elements used for reference signal
transmission according to the above definition. The notation pR is used to denote a resource element used for reference
signal transmission on antenna port p .
R0
R0
R0
R0
R0
R0
R0
R0
0=l 6=l 0=l 6=l
R0
R0
R0
R0
R0
R0
R0
R0
0=l 6=l 0=l 6=l
R1
R1
R1
R1
R1
R1
R1
R1
0=l 6=l 0=l 6=l
even-numbered slots odd-numbered slots
R3
R3
R3
R3
0=l 6=l 0=l 6=l
R0
R0
R0
R0
even-numbered slots odd-numbered slots
R0
R0
R0
R0
0=l 6=l 0=l 6=l
R1
R1
R1
R1
even-numbered slots odd-numbered slots
R1
R1
R1
R1
0=l 6=l 0=l 6=l
even-numbered slots odd-numbered slots
R2
R2
R2
R2
0=l 6=l 0=l 6=l
Oneantennaport
Twoantennaports
Fourantennaports
Antenna port 0 Antenna port 1 Antenna port 2 Antenna port 3
Not used for transmission on this antenna port
Reference symbols on this antenna port
( )lk,elementResource
Figure 6.10.1.2-1. Mapping of downl ink reference signals (frame structure type 1, normal cyclicprefix).
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R0
R0
R0
R0
R0
R0
R0
R0
0=l 5=l 0=l 5=l
R1
R1
R1
R1
R1
R1
R1
R1
0=l 5=l 0=l 5=l
R0
R0
R0
R0
even-numbered slots odd-numbered slots
R0
R0
R0
R0
0=l 5=l 0=l 5=l
R0
R0
R0
R0
R0
R0
R0
R0
0=l 5=l 0=l 5=l
Oneantennaport
Twoantennaports
Fourantennaports
Antenna port 0 Antenna port 1 Antenna port 2 Antenna port 3
Not used for transmission on this antenna port
R1
R1
R1
R1
R1
R1
R1
R1
0=l 5=l 0=l 5=l
even-numbered slots odd-numbered slots
R3
R3
R3
R3
0=l 5=l 0=l 5=l
even-numbered slots odd-numbered slots
Reference symbols on this antenna port
( )lk,elementResource
R2
R2
R2
0=l 5=l 0=l 5=l
even-numbered slots odd-numbered slots
R2
Figure 6.10.1.2-2. Mapping o f downlink reference signals (frame struc ture type 1, extended cycli cprefix).
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R0
R0
R0
R0
0=l 7=l
R0
R0
R0
R0
0=l 7=l
R1
R1
R1
R1
0=l 7=l
subframe
R0
R0
R0
R0
0=l 7=l
R1
R1
R1
R1
0=l 7=l
subframe
R2
R2
R2
R2
0=l 7=l
subframe
R3
R3
R3
R3
0=l 7=l
subframe
Oneantennaport
Twoantennaports
Fourantennaports
Antenna port 0 Antenna port 1 Antenna port 2 Antenna port 3
Not used for transmission on this antenna port
Reference symbols on this antenna port
( )lk,elementResource
Figure 6.10.1.2-4: Mapping of downlink reference signals (frame structure type 2, extended cyc licprefix).
6.10.2 MBSFN reference signals
MBSFN reference signals shall only be transmitted in subframes allocated for MBSFN transmissions. MBSFN
reference signals are transmitted on antenna port 4.
6.10.2.1 Sequence generation
6.10.2.2 Mapping to resource elements
Figures 6.10.2.2-1 and 6.10.2.2-2 illustrate the resource elements used for MBSFN reference signal transmission in case
of kHz15=f for frame structure type 1 and 2 respectively. In case of kHz5.7=f for a MBSFN-dedicated cell, the
MBSFN reference signal shall be mapped to resource elements according to Figures 6.10.2.2-3 and 6.10.2.2-4 for frame
structure type 1 and 2, respectively. The notation pR is used to denote a resource element used for reference signal
transmission on antenna port p .
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R4
R4
0=l 5=l 0=l 5=l
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
even-numbered slots odd-numbered slots
Antenna port 4
Figure 6.10.2.2-1: Mapping of MBSFN reference signals (frame structure type 1, extended cyclic
prefix, kHz15=f )
0=l 7=l
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
R4
subframe
Antenna port 4
Figure 6.10.2.2-2: Mapping of MBSFN reference signals (frame structure type 2, extended cyclic
prefix, kHz15=f )
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0=l 2=l 0=l 2=l
R4
R4
R4
R4
R4
R4
R4
R4
even-numbered
slots
odd-numbered
slots
Antenna port 4
R4
Figure 6.10.2.2-3: Mapping of MBSFN reference signals (frame structure type 1, extended cyclic
prefix, kHz5.7=f )
0=l 3=l
R4
R4
R4
R4
R4
R4
subframe
Antenna port 4
Figure 6.10.2.2-4: Mapping of MBSFN reference signals (frame structure type 2, extended cyclic
prefix, kHz5.7=f )
6.10.3 UE-specific reference signals
UE-specific reference signals are supported for single-antenna-port transmission of PDSCH in frame structure type 2
only and are transmitted on antenna port 5. The UE is informed by higher layers whether the UE-specific referencesignal is present and is a valid phase reference for PDSCH demodulation or not.
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6.11.2 Secondary synchronization signal
6.11.2.1 Sequence generation
The sequence used for the second synchronization signal is an interleaved concatenation of two length-31 binary
sequences obtained as cyclic shifts of a single length-31 M-sequence generated by 125 ++xx . The concatenated
sequence is scrambled with a scrambling sequence given by the primary synchronization signal.
6.11.2.2 Mapping to resource elements
The mapping of the sequence to resource elements depends on the frame structure. In a subframe, the same antenna port
as for the primary synchronization signal shall be used for the secondary synchronization signal.
For frame structure type 1, the secondary synchronization signal is only transmitted in slots 0 and 10 and the sequence
( )nd shall be mapped to the resource elements according to
( ) 61,...,0,2,2
31, DLsymb
RBsc
DLRB
, ==
+== nNl
NNnknda lk
Resource elements ),( lk in slots 0 and 10 where
66,...,63,62,1,...,4,5,2,2
31 DLsymb
RBsc
DLRB ==
+= nNl
NNnk
are reserved and not used for transmission of the secondary synchronization signal.
For frame structure type 2, the secondary synchronization signal is transmitted in the last OFDM symbol of subframe 0.
6.12 OFDM baseband signal generation
The OFDM symbols in a slot shall be transmitted in increasing order of l . The time-continuous signal ( )ts pl
)(
on
antenna port p in OFDM symbol l in a downlink slot is defined by
( ) ( )
( )
=
=
+= +
2/
1
2)(
,
1
2/
2)(
,
)(
RBsc
DLRB
s,CP)(
RBsc
DLRB
s,CP)(
NN
k
TNtfkjp
lkNNk
TNtfkjp
lk
pl
ll eaeats
for s,CP0 TNNt l +
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Table 6.12-1: OFDM parameters.
Cyclic prefix length lN ,CP ConfigurationFrame stru cture type 1 Frame stru cture type 2
Normal cyclic prefix kHz15=f 0for160 =l
6,...,2,1for144 =l 8...,10for256 ,,l=
kHz15=f 5,...,1,0for512 =l 7...,10for544 ,,l= Extended cyclic prefix kHz5.7=f 2,1,0for1024 =l 3...,10for1088 ,,l=
6.13 Modulation and upconversion
Modulation and upconversion to the carrier frequency of the complex-valued OFDM baseband signal for each antennaport is shown in Figure 6.13-1. The filtering required prior to transmission is defined by the requirements in [6].
{ })(Re )( ts pl
{ })(Im )( ts pl
( )tf02cos
( )tf02sin
)()(ts
pl
Figure 6.13-1: Downlink modulation.
7 Modulation mapper
The modulation mapper takes binary digits, 0 or 1, as input and produces complex-valued modulation symbols,x=I+jQ,
as output.
7.1 BPSK
In case of BPSK modulation, a single bit0, )(ib , is mapped to a complex-valued modulation symbolx=I+jQaccording
to Table 7.1-1.
Table 7.1-1: BPSK modulation mapping
)(ib I Q
0 21 21
1 21 21
7.2 QPSK
In case of QPSK modulation, pairs of bits, )1(),( +ibib , are mapped to complex-valued modulation symbolsx=I+jQ
according to Table 7.2-1.
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Table 7.2-1: QPSK modulation mapping
)1(),( +ibib I Q
00 21 21
01 21 21
10 21 21
11 21 21
7.3 16QAM
In case of 16QAM modulation, quadruplets of bits, )3(),2(),1(),( +++ ibibibib , are mapped to complex-valued
modulation symbolsx=I+jQaccording to Table 7.3-1.
Table 7.3-1: 16QAM modulation mapping
)3(),2(),1(),( +++ ibibibib I Q
0000 101 101
0001 101 103
0010 103 101
0011 103 103
0100 101 101
0101 101 103
0110 103 101
0111 103 103
1000 101 101
1001 101 103
1010 103 101
1011 103 103
1100 101 101
1101 101 103
1110 103 101
1111 103 103
7.4 64QAMIn case of 64QAM modulation, hextuplets of bits, )5(),4(),3(),2(),1(),( +++++ ibibibibibib , are mapped to complex-
valued modulation symbolsx=I+jQaccording to Table 7.4-1.
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Table 7.4-1: 64QAM modulation mapping
)5(),4(),3(),2(),1(),( +++++ ibibibibibib I Q )5(),4(),3(),2(),1(),( +++++ ibibibibibib I Q
000000 423 423 100000 423 423
000001 423 421 100001 423 421
000010 421 423 100010 421 423
000011 421 421 100011 421 421
000100 423 425 100100 423 425
000101 423 427 100101 423 427
000110 421 425 100110 421 425
000111 421 427 100111 421 427
001000 425 423 101000 425 423
001001 425 421 101001 425 421
001010 427 423 101010 427 423
001011 427 421 101011 427 421
001100 425 425 101100 425 425
001101 425 427 101101 425 427
001110 427 425 101110 427 425
001111 427 427 101111 427 427
010000 423 423 110000 423 423
010001 423 421 110001 423 421
010010 421 423 110010 421 423
010011 421 421 110011 421 421
010100 423 425
110100 423
425
010101 423 427 110101 423 427
010110 421 425 110110 421 425
010111 421 427 110111 421 427
011000 425 423 111000 425 423
011001 425 421 111001 425 421
011010 427 423 111010 427 423
011011 427 421 111011 427 421
011100 425 425 111100 425 425
011101 425 427 111101 425 427
011110 427 425 111110 427 425
011111 427 427 111111 427 427
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8 Timing
8.1 Uplink-downlink frame timing
Transmission of the uplink radio frame number i from the UE shall start sTNTA seconds before the start of the
corresponding downlink radio frame at the UE. Note that not all slots in a radio frame may be transmitted. One examplehereof is TDD, where only a subset of the slots in a radio frame is transmitted.
Downlink radio frame #i
Uplink radio frame #i
NTATS time units
Figure 8.1-1: Uplink-downlink timing relation
Annex A (informative):Change history
Change historyDate TSG # TSG Doc. CR Rev Subjec t/Comm ent Old New
2006-09-24 - - - Draft version created - 0.0.0
2006-10-09 - - - Updated skeleton 0.0.0 0.0.1
2006-10-13 - - - Endorsed by RAN1 0.0.1 0.1.0
2006-10-23 - - - Inclusion of decision from RAN1#46bis 0.1.0 0.1.1
2006-11-06 - - - Updated editors version 0.1.1 0.1.2
2006-11-09 - - - Updated editors version 0.1.2 0.1.3
2006-11-10 - - - Endorsed by RAN1#47 0.1.3 0.2.02006-11-27 - - - Editors version, including decisions from RAN1#47 0.2.0 0.2.1
2006-12-14 - - - Updated editors version 0.2.1 0.2.2
2007-01-15 - - - Updated editors version 0.2.2 0.2.3
2007-01-19 - - - Endorsed by RAN1#47bis 0.2.3 0.3.0
2007-02-01 - - - Editors version, including decisions from RAN1#47bis 0.3.0 0.3.1
2007-02-12 - - - Updated editors version 0.3.1 0.3.2
2007-02-16 - - - Endorsed by RAN1#48 0.3.2 0.4.0
2007-02-16 - - - Editors version, including decisions from RAN1#48 0.4.0 0.4.1
2007-02-21 - - - Updated editors version 0.4.1 0.4.2
2007-03-03 RAN#35 RP-070169 For information at RAN#35 0.4.2 1.0.0
2007-04-25 - - -Editors version, including decisions from RAN1#48bis and RAN1TDD Ad Hoc
1.0.0 1.0.1
2007-05-03 - - - - Updated editors version 1.0.1 1.0.2
2007-05-08 - - - - Updated editors version 1.0.2 1.0.3
2007-05-11 - - - - Updated editors version 1.0.3 1.0.4
2007-05-11 - - - - Endorsed by RAN1#49 1.0.4 1.1.0
2007-05-15 - - - - Editors version, including decisions from RAN1#49 1.1.0 1.1.1
2007-06-05 - - - - Updated editors version 1.1.1 1.1.2
2007-06-25 - - - - Endorsed by RAN1#49bis 1.1.2 1.2.0
2007-07-10 - - - - Editors version, including decisions from RAN1#49bis 1.2.0 1.2.1
2007-08-10 - - - - Updated editors version 1.2.1 1.2.2
2007-08-20 - - - - Updated editors version 1.2.2 1.2.3
2007-08-24 - - - - Endorsed by RAN1#50 1.2.3 1.3.0