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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


prefixNormal cycl ic


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


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


PCFICH QPSK


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 .


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


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 .


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


PHICH


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 .


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


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


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


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



R1

R1

R1

R1

R1

R1

R1

R1

0=l 5=l 0=l 5=l


R3

R3

R3

R3

0=l 5=l 0=l 5=l




R2

R2

R2

0=l 5=l 0=l 5=l


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





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.


6.10.2.2 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


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


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


prefix, kHz5.7=f )

0=l 3=l

R4

R4

R4

R4

R4

R4

subframe

Antenna port 4


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


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


2006-11-10 - - - 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



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


2007-02-16 - - - 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


2007-03-03 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



2007-05-11 - - - - 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


2007-06-25 - - - - 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



2007-08-24 - - - - Endorsed by RAN1#50 1.2.3 1.3.0

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