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 3rd Generation 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 3GPP Organizational Partners and shall not be implemented. This Specification is provided for future development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification.Specifications and reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organizational Partners' Publications Offices.

3GPP

3GPP TS 36.211 V2.0.0 (2007-09)2Release 8

Keywords UMTS, radio, layer 1

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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 ...................................................................................................7 3.1 Symbols ................................................................................................................................................................. 7 3.2 Abbreviations ........................................................................................................................................................ 8 4 Frame structure.........................................................................................................................................8 4.1 Frame structure type 1 .......................................................................................................................................... 8 4.2 Frame structure type 2 .......................................................................................................................................... 9 5 Uplink.......................................................................................................................................................9 5.1 Overview ............................................................................................................................................................... 9 5.1.1 Physical channels ............................................................................................................................................ 9 5.1.2 Physical signals ............................................................................................................................................... 9 5.2 Slot structure and physical resources.................................................................................................................. 10 5.2.1 Resource grid................................................................................................................................................. 10 5.2.2 Resource elements......................................................................................................................................... 11 5.2.3 Resource blocks............................................................................................................................................. 11 5.3 Physical uplink shared channel........................................................................................................................... 11 5.3.1 Scrambling..................................................................................................................................................... 11 5.3.2 Modulation .................................................................................................................................................... 12 5.3.3 Transform precoding ..................................................................................................................................... 12 5.3.4 Mapping to physical resources...................................................................................................................... 12 5.4 Physical uplink control channel.......................................................................................................................... 12 5.4.1 Scrambling..................................................................................................................................................... 13 5.4.2 Modulation .................................................................................................................................................... 13 5.4.2.1 Sequence modulation for PUCCH format 0 and 1 ................................................................................. 13 5.4.2.2 Sequence modulation for PUCCH format 2 ........................................................................................... 14 5.4.3 Mapping to physical resources...................................................................................................................... 14 5.5 Reference signals ................................................................................................................................................ 14 5.5.1 Generation of the base reference signal sequence........................................................................................ 14 5.5.1.1 Reference signal sequences of length 36 or larger ................................................................................. 15 5.5.1.2 Reference signal sequences of length less than 36 ................................................................................. 15 5.5.2 Demodulation reference signal ..................................................................................................................... 15 5.5.2.1 Demodulation reference signal for PUSCH............................................................................................ 15 5.5.2.1.1 Reference signal sequence................................................................................................................. 15 5.5.2.1.2 Mapping to physical resources .......................................................................................................... 16 5.5.2.2 Demodulation reference signal for PUCCH ........................................................................................... 16 5.5.2.2.1 Reference signal sequence................................................................................................................. 16 5.5.2.2.2 Mapping to physical resources .......................................................................................................... 17 5.5.3 Sounding reference signal ............................................................................................................................. 17 5.5.3.1 Sequence generation................................................................................................................................ 17 5.5.3.2 Mapping to physical resources................................................................................................................ 17 5.6 SC-FDMA baseband signal generation .............................................................................................................. 18 5.7 Physical random access channel ......................................................................................................................... 18 5.7.1 Time and frequency structure ....................................................................................................................... 18 5.7.2 Preamble sequence generation ...................................................................................................................... 19 5.7.3 Baseband signal generation........................................................................................................................... 19 5.8 Modulation and upconversion ............................................................................................................................ 20 6 Downlink................................................................................................................................................20 6.1 Overview ............................................................................................................................................................. 20 6.1.1 Physical channels .......................................................................................................................................... 20 6.1.2 Physical signals ............................................................................................................................................. 21 6.2 Slot structure and physical resource elements.................................................................................................... 21

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6.2.1 Resource grid................................................................................................................................................. 21 6.2.2 Resource elements......................................................................................................................................... 21 6.2.3 Resource blocks............................................................................................................................................. 22 6.2.4 Guard Period for TDD Operation ................................................................................................................. 25 6.3 General structure for downlink physical channels ............................................................................................. 25 6.3.1 Scrambling..................................................................................................................................................... 25 6.3.2 Modulation .................................................................................................................................................... 26 6.3.3 Layer mapping............................................................................................................................................... 26 6.3.3.1 Layer mapping for transmission on a single antenna port...................................................................... 26 6.3.3.2 Layer mapping for spatial multiplexing.................................................................................................. 26 6.3.3.3 Layer mapping for transmit diversity...................................................................................................... 27 6.3.4 Precoding....................................................................................................................................................... 27 6.3.4.1 Precoding for transmission on a single antenna port .............................................................................. 27 6.3.4.2 Precoding for spatial multiplexing .......................................................................................................... 27 6.3.4.2.1 Precoding for zero and small-delay CDD ......................................................................................... 27 6.3.4.2.2 Precoding for large delay CDD ......................................................................................................... 28 6.3.4.2.3 Codebook for precoding .................................................................................................................... 29 6.3.4.3 Precoding for transmit diversity.............................................................................................................. 30 6.3.5 Mapping to resource elements ...................................................................................................................... 31 6.4 Physical downlink shared channel...................................................................................................................... 31 6.5 Physical multicast channel.................................................................................................................................. 31 6.6 Physical broadcast channel ................................................................................................................................. 32 6.6.1 Scrambling..................................................................................................................................................... 32 6.6.2 Modulation .................................................................................................................................................... 32 6.6.3 Layer mapping and precoding....................................................................................................................... 32 6.6.4 Mapping to resource elements ...................................................................................................................... 32 6.7 Physical control format indicator channel .......................................................................................................... 32 6.7.1 Scrambling..................................................................................................................................................... 33 6.7.2 Modulation .................................................................................................................................................... 33 6.7.3 Layer mapping and precoding....................................................................................................................... 33 6.7.4 Mapping to resource elements ...................................................................................................................... 33 6.8 Physical downlink control channel..................................................................................................................... 33 6.8.1 PDCCH formats ............................................................................................................................................ 33 6.8.2 Scrambling..................................................................................................................................................... 33 6.8.3 Modulation .................................................................................................................................................... 34 6.8.4 Layer mapping and precoding....................................................................................................................... 34 6.8.5 Mapping to resource elements ...................................................................................................................... 34 6.9 Physical hybrid ARQ indicator channel ............................................................................................................. 34 6.9.1 Scrambling..................................................................................................................................................... 34 6.9.2 Modulation .................................................................................................................................................... 35 6.9.3 Layer mapping and precoding....................................................................................................................... 35 6.9.4 Mapping to resource elements ...................................................................................................................... 35 6.10 Reference signals ................................................................................................................................................ 35 6.10.1 Cell-specific reference signals ...................................................................................................................... 36 6.10.1.1 Sequence generation................................................................................................................................ 36 6.10.1.1.1 Orthogonal sequence generation ....................................................................................................... 36 6.10.1.1.2 Pseudo-random sequence generation ................................................................................................ 37 6.10.1.2 Mapping to resource elements................................................................................................................. 37 6.10.2 MBSFN reference signals ............................................................................................................................. 41 6.10.2.1 Sequence generation................................................................................................................................ 41 6.10.2.2 Mapping to resource elements................................................................................................................. 41 6.10.3 UE-specific reference signals........................................................................................................................ 43 6.10.3.1 Sequence generation................................................................................................................................ 44 6.10.3.2 Mapping to resource elements................................................................................................................. 44 6.11 Synchronization signals ...................................................................................................................................... 44 6.11.1 Primary synchronization signal..................................................................................................................... 44 6.11.1.1 Sequence generation................................................................................................................................ 44 6.11.1.2 Mapping to resource elements................................................................................................................. 44 6.11.2 Secondary synchronization signal................................................................................................................. 45 6.11.2.1 Sequence generation................................................................................................................................ 45 6.11.2.2 Mapping to resource elements................................................................................................................. 45 6.12 OFDM baseband signal generation .................................................................................................................... 45

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6.13 Modulation and upconversion ............................................................................................................................ 46 7 Modulation mapper ................................................................................................................................46 7.1 BPSK................................................................................................................................................................... 46 7.2 QPSK................................................................................................................................................................... 46 7.3 16QAM................................................................................................................................................................ 47 7.4 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.) or non-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 (including a 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: <RAN4 specification listing supported transmission bandwidths>

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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 k and time-domain index l )(

,plka 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)M bit Number of coded bits to transmit on a physical channel [for code word q ] (q)M symb 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 kHz 15=Δf and 4096 for kHz 5.7=Δf

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 RB

scN ULRBN Uplink bandwidth configuration, expressed in units of RB

scN 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

PRACHβ Amplitude scaling for PRACH

PUCCHβ Amplitude scaling for PUCCH

PUSCHβ Amplitude scaling for PUSCH

SRSβ Amplitude scaling for sounding reference symbols fΔ Subcarrier spacing

RAfΔ Subcarrier spacing for the random access preamble

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υ Number of transmission layers

3.2 Abbreviations For the purposes of the present document, the following abbreviations apply:

CCE Control Channel Element CDD Cyclic Delay Diversity PBCH Physical broadcast channel PCFICH Physical control format indicator channel PDCCH Physical downlink control channel PDSCH Physical downlink shared channel PHICH Physical hybrid-ARQ indicator channel PMCH Physical multicast channel PRACH Physical random access channel PUCCH Physical uplink control channel PUSCH Physical uplink shared channel

4 Frame structure Throughout 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 ms 10307200 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 is

ms 10307200 sf =×= TT long and consists of 20 slots of length ms 5.0T15360 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 transmissions in 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

ms 5153600 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 reserved for 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 of RBsc

ULRB NN subcarriers and UL

symbN SC-FDMA

symbols. The resource grid is illustrated in Figure 5.2.1-1. The quantity ULRBN depends on the uplink transmission

bandwidth configured in the cell and shall fulfil

1106 ULRB ≤≤ N

The set of allowed values for ULRBN is given by [6].

The number of SC-FDMA symbols in a slot depends on the cyclic prefix length configured by higher layers and is given in Table 5.2.3-1.

ULsymbN

slotT

0=l 1ULsymb −= Nl

RB scUL RB

NN

×

RB scN

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 RBsc

ULRB −= NNk and 1,...,0 UL

symb −= 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 not used 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 and RB

scN consecutive

subcarriers in the frequency domain, where ULsymbN and RB

scN are given by Table 5.2.3-1. A resource block in the uplink

thus consists of RBsc

ULsymb 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 RB

scN

Frame structure type 1 Frame structure type 2 Normal 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

⎥⎥⎦

⎥

⎢⎢⎣

⎢= RB

scPRB N

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( bit −Mbb , 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( bit −Mcc .

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5.3.2 Modulation The block of scrambled bits )1(),...,0( bit −Mcc shall be modulated as described in Section 7, resulting in a block of complex-valued symbols )1(),...,0( symb −Mdd . Table 5.3.2-1 specifies the modulation mappings applicable for the physical uplink shared channel.

Table 5.3.2-1: Uplink modulation schemes

Physical channel Modulation schemes PUSCH QPSK, 16QAM, 64QAM

5.3.3 Transform precoding

The block of complex-valued symbols )1(),...,0( symb −Mdd is divided into PUSCHscsymb MM sets, each corresponding

to one SC-FDMA symbol. Transform precoding shall be applied according to

1,...,0

1,...,0

)()(

PUSCHscsymb

PUSCHsc

1

0

2PUSCHsc

PUSCHsc

PUSCHsc PUSCH

sc

−=

−=

+⋅=+⋅ ∑−

=

−

MMl

Mk

eiMldkMlzM

i

Mikj π

resulting in a block of complex-valued modulation symbols )1(),...,0( symb −Mzz . The variable PUSCHscM 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 ⋅≤⋅⋅⋅= ααα

where 532 ,, ααα is a set of non-negative integers.

5.3.4 Mapping to physical resources The block of complex-valued symbols )1(),...,0( symb −Mzz shall be multiplied with the amplitude scaling factor

PUSCHβ 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 first the index l , then the slot number and finally the index k . The index k is 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 transmitted simultaneously 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 PUCCH format

Modulation scheme 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( bit −Mbb , 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( bit −Mcc .

5.4.2 Modulation The block of scrambled bits )1(),...,0( bit −Mcc shall be modulated as described in Section 7, resulting in a block of complex-valued symbols )1(),...,0( symb −Mdd . 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 PUCCH

seqRSsc 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 ⋅=+⋅+⋅⋅ )(' PUCCHseq

PUCCHseq

PUCCHSF

where

⎩⎨⎧

=

−=

−=

2 typestructure framefor 01 typestructure framefor 1,0

'

1,...,0

1,...,0PUCCHseq

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 structure type 1 Frame structure type 2 4PUCCH

SF =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 PUCCH

seqRSsc 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 PUCCHβ 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 of values for index k shall 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.

frequ

ency

1 ms subframe

resource i

resource i

resource j

resource j

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 RS

scM 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( RS

sc −Mrr is given by

RSsc

RSZC 0),mod)(()( MnNnxenr u

nj <≤+= θα

where θ is an offset and the thu root Zadoff-Chu sequence is defined by

( ) 10, RSZC

)1(RSZC −≤≤=+

−

Nmemx Nmumj

u

π

and the length RSZCN of the Zadoff-Chu sequence is given by the largest prime number such that RS

scRSZC MN < . The factor

nje α corresponds to a cyclic shift in the time domain.

5.5.1.2 Reference signal sequences of length less than 36

For 36RSsc <M , the sequence )1(),...,0( RS

sc −Mrr is given by Table 5.5.1.2-1.

Table 5.5.1.2-1: Reference signal sequences of length 36RSsc <M .

)1(),...,1(),0( RSsc −Mrrr Sequence

index 12RS

sc =M 24RSsc =M

5.5.2 Demodulation reference signal

5.5.2.1 Demodulation reference signal for PUSCH

5.5.2.1.1 Reference signal sequence

The demodulation reference signal sequence ( )⋅PUSCHr for PUSCH is defined by

( ) ( )α,RSsc

PUSCH nrnMmr =+⋅

where

1,...,0

2 typestructure framefor 01 typestructure framefor 1,0

RSsc −=

⎩⎨⎧

=

Mn

m

and

PUSCHsc

RSsc MM =

Section 5.5.1 defines the sequence )1(),...,0( RSsc −Mrr . Note that different cyclic shifts α can be used in different slots

of a subframe. The cyclic shift to use in the first slot of the subframe is given by the uplink scheduling grant in case of multiple shifts within the cell.

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5.5.2.1.2 Mapping to physical resources

The sequence ( )⋅PUSCHr shall be multiplied with the amplitude scaling factor PUSCHβ and mapped in sequence starting

with )0(PUSCHr 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

( ) ( )α,)(' RSsc

RSsc

PUCCHRS

PUCCH nrmwnMmMNmr ⋅=+⋅+⋅⋅

where

⎩⎨⎧

=

−=

−=

2 typestructure framefor 01 typestructure framefor 1,0

'

1,...,0

1,...,0RSsc

PUCCHRS

m

Mn

Nm

The sequence )(nr is given by Section 5.5.1 with. 12RSsc =M . The number of reference symbols per slot PUCCH

RSN 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 α 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 slot PUCCHRSN .

Frame structure type 1 Frame structure type 2 PUCCH format Normal cyclic

prefix Extended cyclic

prefix Normal cyclic

prefix Extended cyclic

prefix 0 1 3 2 2 2 1

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Table 5.5.2.2.1-2: Orthogonal sequences [ ])1()0( PUCCHRS −Nww L for PUCCH format 0 and 1.

Frame structure type 1 Frame structure type 2 Sequence index Normal cyclic

prefix Extended cyclic

prefix Normal cyclic

prefix Extended cyclic

prefix 0 [ ]111 [ ]11

1 [ ]34321 ππ jj ee [ ]11 −

2 [ ]32341 ππ jj ee N/A

Table 5.5.2.2.1-3: Orthogonal sequences [ ])1()0( PUCCHRS −Nww L for 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 PUCCHβ and mapped in sequence starting

with )0(PUCCHr 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 k as 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 structure type 2

PUCCH Format

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 from the 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 SRSβ and mapped in

sequence starting with )0(SRSr to resource elements ),( lk according to

⎪⎩

⎪⎨⎧ −=

=+ otherwise01,...,1,0)( RS

scSRS

SRS,2 0

Mkkra lkkβ

where 0k is the frequency-domain starting position of the sounding reference signal and RSscM is the length of the

sounding reference signal sequence.

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3GPP TS 36.211 V2.0.0 (2007-09)18Release 8

5.6 SC-FDMA baseband signal generation This section applies to all uplink physical signals and physical channels except the physical random access channel.

The SC-FDMA symbols in a slot shall be transmitted in increasing order of l . The time-continuous signal ( )tsl in SC-FDMA symbol l in an uplink slot is defined by

( ) ( ) ( )

⎣ ⎦

⎡ ⎤∑

−

−=

−Δ+⋅= −

12/

2/

212,

RBsc

ULRB

RBsc

ULRB

s,CP)(

NN

NNk

TNtfkjlkl

leats π

for ( ) s,CP0 TNNt l ×+<≤ where ⎣ ⎦2)( RBsc

ULRB NNkk +=− , 2048=N and kHz 15=Δf .

Tables 5.6-1lists the values of lN ,CP that shall be used for the two frame structures. Note that different SC-FDMA symbols within a slot may have different cyclic prefix lengths.

Table 5.6-1. SC-FDMA parameters.

Cyclic prefix length lN ,CP Configuration

Frame structure type 1 Frame structure type 2

Normal cyclic prefix 0for 160 =l

6,...,2,1for 144 =l 8,...,1,0for 562 =l

Extended cyclic prefix 5,...,1,0for 512 =l 7,...,1,0for 445 =l

5.7 Physical random access channel

5.7.1 Time and frequency structure The physical layer random access burst, illustrated in Figure 5.7.1-1, consists of a cyclic prefix of length CPT , and a preamble of length PRET . The parameter values are listed in Table 5.7.1-1 and depend on the frame structure and the random access configuration. Higher layers control the preamble format.

CPT PRET

Figure 5.7.1-1: Random access preamble format.

Table 5.7.1-1: Random access burst parameters.

Frame structure

Burst format CPT PRET

0 s3152 T× s24576 T×

1 s21012 T× s24576 T×

2 s6224 T× s245762 T×× Type 1

3 s21012 T× s245762 T××

0 s0 T× s4096 T×

1 s0 T× s16384 T× Type 2

2

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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 burst timing for frame structure type 1.

PRACH configuration 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 both frame 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.

The thu root Zadoff-Chu sequence is defined by

( ) 10, ZC

)1(

ZC −≤≤=+

−Nnenx N

nunj

u

π

where the length ZCN of the Zadoff-Chu sequence is given by Table 5.7.2-1. From the thu 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

0 139 552 Type 2 1 557 16

5.7.3 Baseband signal generation The time-continuous random access signal )(ts is defined by

( ) ( )( ) ( )∑ ∑−

=

−Δ+++−

=

−⋅⋅=

1

0

21

0

2

,PRACH

ZCCPRA2

10

ZCZC)(

N

k

TtfkKkjN

n

Nnkj

vu eenxts ϕππ

β

where CPPRE0 TTt +<≤ , PRACHβ is an amplitude scaling factor and 2RBsc

ULRB

RBscRA0 NNNkk −= . The location in the

frequency domain is controlled by the parameter RAk , expressed as a resource block number configured by higher

layers and fulfilling 60 ULRBRA −≤≤ Nk . The factor RAffK ΔΔ= accounts for the difference in subcarrier spacing

between the random access preamble and uplink data transmission. The variable RAfΔ , the subcarrier spacing for the random access preamble, and the variable ϕ , a fixed offset determining the frequency-domain location of the random access preamble within the resource blocks, are both given by Table 5.7.3-1.

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Table 5.7.3-1: Random access baseband parameters.

Frame structure Burst format RAfΔ ϕ

Type 1 0 – 3 1250 Hz 12 0 7500 Hz 2 Type 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 π

( )tf02sin π−

)(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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3GPP TS 36.211 V2.0.0 (2007-09)21Release 8

6.1.2 Physical signals A downlink signal corresponds to a set of resource elements used by the physical layer but does not carry information originating from higher layers. The following downlink physical signals are defined:

- reference signal

- synchronization signal

6.2 Slot structure and physical resource elements

6.2.1 Resource grid

The transmitted signal in each slot is described by a resource grid of RBsc

DLRB NN subcarriers and DL

symbN OFDM symbols.

The resource grid structure is illustrated in Figure 6.2.2-1. The quantity DLRBN depends on the downlink transmission

bandwidth configured in the cell and shall fulfil

1106 DLRB ≤≤ N

The set of allowed values for DLRBN is given by [6]. The number of OFDM symbols in a slot depends on the cyclic

prefix length and subcarrier spacing configured and is given in Table 6.2.3-1.

In case of multi-antenna transmission, there is one resource grid defined per antenna port. An antenna port is defined by its associated reference signal. The set of antenna ports supported depends on the reference signal configuration in the cell:

- Cell-specific reference signals, associated with non-MBSFN transmission, support a configuration of one, two, or four antenna ports, i.e. the antenna port number p shall fulfil 0=p , { }1,0∈p , and { }3,2,1,0∈p , respectively.

- MBSFN reference signals, associated with MBSFN transmission, are transmitted on antenna port 4=p .

- UE-specific reference signals, supported in frame structure type 2 only, are transmitted on antenna port 5=p .

6.2.2 Resource elements Each element in the resource grid for antenna port p is called a resource element and is uniquely identified by the

index pair ( )lk , in a slot where 1,...,0 RBsc

DLRB −= NNk and 1,...,0 DL

symb −= Nl are the indices in the frequency and time

domains, respectively. Resource element ( )lk, on antenna port p corresponds to the complex value )(,plka . When there

is no risk for confusion, or no particular antenna port is specified, the index p may be dropped.

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3GPP TS 36.211 V2.0.0 (2007-09)22Release 8

DLsymbN

slotT

0=l 1DLsymb −= Nl

RB scDL RB

NN

×

RB scN

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 as DLsymbN consecutive OFDM symbols in the time domain and RB

scN consecutive

subcarriers in the frequency domain, where DLsymbN and RB

scN are given by Table 6.2.3-1. A physical resource block thus

consists of RBsc

DLsymb 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 on DLRBN and the subframe number. The

relation between the physical resource block number PRBn and resource elements ),( lk in a slot is given by

⎥⎥⎦

⎥

⎢⎢⎣

⎢= RB

scPRB N

kn

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with the exception of subframe 0 in case of DLRBN being an odd number in which case

RBsc

DLRB

RBsc

DLRB

RBsc

PRB

RBsc

DLRBRB

sc

DLRB

RBsc

RBsc

PRB

RBsc

DLRB

RBsc

PRB

27for

12

62

6for2

12

70for

NNkNNN

kn

NNkNNNNk

n

NNkN

kn

⋅≤≤⋅+

⎥⎥⎦

⎥

⎢⎢⎣

⎢=

−⋅+

≤≤⋅−

⎥⎥⎦

⎥

⎢⎢⎣

⎢ −=

−⋅−

≤≤⎥⎥⎦

⎥

⎢⎢⎣

⎢=

The resulting resource block structure is illustrated in Figure 6.2.3-1. Note that there is no physical resource block with number ( )( ) 321DL

RBPRB +−= Nn in subframe 0 in case of DLRBN being an odd number.

Table 6.2.3-1: Physical resource block parameters.

DLsymbN

Configuration RBscN

Frame structure type 1 Frame structure type 2 Normal cyclic prefix kHz 15=Δf 7 9

kHz 15=Δf 12

6 8 Extended cyclic prefix

kHz 5.7=Δf 24 3 4

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3GPP TS 36.211 V2.0.0 (2007-09)24Release 8

DC

DL RBN

an e

ven

num

ber o

f res

ourc

e bl

ocks

Resource block 1DLRB −N

Resource block 0

All subframes

DL RBN

an o

dd n

umbe

r of r

esou

rce

bloc

ks

All subframes except subframe 0

DC DC

Subframe 0

2

RBscN unused subcarriers

Resource block 1DLRB −N

Resource block 42

1DLRB +

−N

DLRBN an odd number of resource blocksDL

RBN an even number of resource blocks

Resource block 1DLRB −N

Resource block 0

Resource block 22

1DLRB +

−N

Resource block 32

1DLRB −

−N

2

RBscN unused subcarriers

Resource block 42

1DLRB −

−N

Resource block 0

Figure 6.2.3-1: Illustration of the relation between resource blocks and resource elements.

A virtual resource block is of the same size as a physical resource block. Two types of virtual resource blocks are defined:

- virtual resource blocks of distributed type

- virtual resource blocks of localized type

Virtual resource blocks are mapped to physical resource blocks with the mapping depending on the diversity order configured.

For second-order diversity, one virtual resource block is mapped to one physical resource block. The virtual-to-physical resource block mapping is different in the two slots of a subframe.

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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. The supported 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 symbols Configuration Subframe 0 Subframe 5 All other subframes Normal cyclic prefix kHz 15=Δf 0, 1, 2, 3, 4, 5 0, 1, 2, 3, 4, 5 0, 1, 2, 3, 4, 5, 12

Extended cyclic prefix kHz 15=Δf 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 obtained by 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 )(bitqM 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., { }1,0∈q .

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3GPP TS 36.211 V2.0.0 (2007-09)26Release 8

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( −= υ , 1,...,1,0 layersymb −= Mi where υ is the number of layers and layer

symbM 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=υ , 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 υ 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 multiplexing

Number of layers Number of code words

Codeword-to-layer mapping 1,...,1,0 layer

symb −= Mi

1 1 )()( )0()0( idix = )0(symb

layersymb MM =

)()( )0()0( idix = 2 2

)()( )1()1( idix = )1(

symb)0(

symblayersymb MMM ==

)()( )0()0( idix =

3 2

)12()()2()(

)1()2(

)1()1(

+==

idixidix

2)1(symb

)0(symb

layersymb MMM ==

)12()()2()(

)0()1(

)0()0(

+==

idixidix

4 2

)12()()2()(

)1()3(

)1()2(

+==

idixidix

22 )1(symb

)0(symb

layersymb MMM ==

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3GPP TS 36.211 V2.0.0 (2007-09)27Release 8

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 υ 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 diversity

Number of layers Number of code words

Codeword-to-layer mapping 1,...,1,0 layer

symb −= Mi

2 1 )12()(

)2()()0()1(

)0()0(

+=

=

idix

idix

2)0(symb

layersymb 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( −= υ , 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 on

each 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 { }5,4,0∈p is the number of the single antenna port used for transmission of the physical channel and

1,...,1,0 apsymb −= Mi , layer

symbapsymb 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

{ }1,0∈p or { }3,2,1,0∈p , 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

ixiWkD

iy

iy

iP υ

MM

where the precoding matrix )(iW is of size υ×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,...,1,0 apsymb −= Mi , layer

symbapsymb MM = .

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3GPP TS 36.211 V2.0.0 (2007-09)28Release 8

The matrix )( ikD shall be selected from Table 6.3.4.2.1-1, where a UE-specific value of δ is semi-statically configured in the UE and the eNodeB by higher layer signalling. The quantity η in Table 6.3.4.2.1-1 is the smallest

number from the set { }2048,1024,512,256,128 such that RBsc

DLRB NN≥η .

Table 6.3.4.2.1-1: Zero and small delay cyclic delay diversity.

δ Set of antenna

ports used Number of layers

υ )( ikD No CDD

Small delay

1 { }1,0

2 ⎥⎦

⎤⎢⎣

⎡⋅⋅− δπ ikje 20

01 0 η2

1

2 3

{ }3,2,1,0

4 ⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢

⎣

⎡

⋅⋅−

⋅⋅−

⋅⋅−

δπ

δπ

δπ

32

22

2

0000000000001

i

i

i

kj

kj

kj

ee

e 0 η1

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 elements in 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

ixUiDiW

iy

iy

P υMM

where the precoding matrix )(iW is of size υ×P and 1,...,1,0 apsymb −= Mi , layer

symbapsymb MM = . The diagonal size- υυ ×

matrix )(iD supporting cyclic delay diversity and the size- υυ × matrix U are both given by Table 6.3.4.2.2-1 for different numbers of layers υ .

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 in the 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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3GPP TS 36.211 V2.0.0 (2007-09)29Release 8

Table 6.3.4.2.2-1: Large-delay cyclic delay diversity

Number of layers υ

U )(iD

1 [ ]1 [ ]1

2 ⎥⎦

⎤⎢⎣

⎡− 221

11πje

⎥⎦

⎤⎢⎣

⎡− 220

01ije π

3 ⎥⎥⎥

⎦

⎤

⎢⎢⎢

⎣

⎡

−−

−−

3834

3432

11

111

ππ

ππ

jj

jj

eeee

⎥⎥⎥

⎦

⎤

⎢⎢⎢

⎣

⎡

−

−

34

32

0000001

ij

ij

ee

π

π

4

⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢

⎣

⎡

−−−

−−−

−−−

41841246

4124844

464442

111

1111

πππ

πππ

πππ

jjj

jjj

jjj

eeeeeeeee

⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢

⎣

⎡

−

−

−

46

44

42

0000000000001

ij

ij

ij

ee

e

π

π

π

6.3.4.2.3 Codebook for precoding

For transmission on two antenna ports, { }1,0∈p , the precoding matrix )(iW for zero, small, and large-delay CDD shall be 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 ports { }1,0 .

Codebook index

Number of layers υ

1 2

0 ⎥⎦

⎤⎢⎣

⎡01

⎥⎦

⎤⎢⎣

⎡1001

21

1 ⎥⎦

⎤⎢⎣

⎡10

⎥⎦

⎤⎢⎣

⎡−1111

21

2 ⎥⎦

⎤⎢⎣

⎡11

21

⎥⎦

⎤⎢⎣

⎡− jj11

21

3 ⎥⎦

⎤⎢⎣

⎡−11

21

-

4 ⎥⎦

⎤⎢⎣

⎡j1

21

-

5 ⎥⎦

⎤⎢⎣

⎡− j1

21

-

For transmission on four antenna ports, { }3,2,1,0∈p , 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 }{snW 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 transmission on antenna ports { }3,2,1,0 .

Codebook index nu Number of layers υ

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{

1W 3}123{1W 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 in Section 6.3.3.3. The precoding operation for transmit diversity is defined for two and four antenna ports.

For transmission on two antenna ports, { }1,0∈p , the output [ ]Tiyiyiy )()()( )1()0(= of the precoding operation is defined by

( )( )( )( )⎥⎥

⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢⎢

⎣

⎡

⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢

⎣

⎡

−

−=

⎥⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢⎢

⎣

⎡

++

)(Im)(Im)(Re)(Re

001010010

001

)12()12(

)2()2(

)1(

)0(

)1(

)0(

)1(

)0(

)1(

)0(

ixixixix

jjj

j

iyiy

iyiy

for 1,...,1,0 layersymb −= Mi with layer

symbapsymb 2MM = .

For transmission on four antenna ports, { }3,2,1,0∈p , the output [ ]Tiyiyiyiyiy )()()()()( )3()2()1()0(= of the precoding operation is defined by

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3GPP TS 36.211 V2.0.0 (2007-09)31Release 8

( )( )( )( )( )( )( )( )⎥

⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢

⎣

⎡

⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢

⎣

⎡

−

−

−

−

=

⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥⎥

⎦

⎤

⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢⎢

⎣

⎡

++++++++++++

)(Im)(Im)(Im)(Im)(Re)(Re)(Re)(Re

000010000000000

000100000000000

000100000000000000010000000000000000000000001000000000000010000000000000010000000000000001

)34()34()34()34()24()24()24()24()14()14()14()14(

)4()4()4()4(

)3(

)2(

)1(

)0(

)3(

)2(

)1(

)0(

)3(

)2(

)1(

)0(

)3(

)2(

)1(

)0(

)3(

)2(

)1(

)0(

)3(

)2(

)1(

)0(

ixixixixixixixix

j

j

j

j

j

j

j

j

iyiyiyiyiyiyiyiyiyiyiyiy

iyiyiyiy

for 1,...,1,0 layersymb −= Mi with layer

symbapsymb 4MM = .

6.3.5 Mapping to resource elements For each of the antenna ports used for transmission of the physical channel, the block of complex-valued symbols

)1(),...,0( apsymb

)()( −Myy pp shall be mapped in sequence starting with )0()( py to virtual resource blocks assigned for

transmission. The mapping to resource elements ( )lk , on antenna port p not reserved for other purposes shall be in increasing order of first the index k and then the index l , starting with the first slot in a subframe.

6.4 Physical downlink shared channel The physical downlink shared channel shall be processed and mapped to resource elements as described in Section 6.3 with the following exceptions:

- The set of antenna ports used for transmission of the PDSCH is one of { }0 , { }1,0 , or { }3,2,1,0 if UE-specific reference signals are not transmitted

- The antenna ports used for transmission of the PDSCH is { }5 if UE-specific reference signals are transmitted

6.5 Physical multicast channel The physical multicast channel shall be processed and mapped to resource elements as described in Section 6.3 with the following exceptions:

- No transmit diversity scheme is specified

- For transmission on a single antenna port, layer mapping and precoding shall be done assuming a single antenna port and the transmission shall use antenna port 4.

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3GPP TS 36.211 V2.0.0 (2007-09)32Release 8

6.6 Physical broadcast channel

6.6.1 Scrambling The block of bits )1(),...,0( bit −Mbb , 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 bit −Mcc .

6.6.2 Modulation The block of scrambled bits ( ) ( )1,...,0 bit −Mcc shall be modulated as described in Section 7, resulting in a block of complex-valued modulation symbols )1(),...,0( symb −Mdd . 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( symb −Mdd 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 { }4,2,1∈P .

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( DL

RB +−N in case DLRBN is an odd number and 32DL

RB −N to 22DLRB +N in case DL

RBN is an even number. The mapping to resource elements ( )lk, not reserved for transmission of reference signals shall be in increasing 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 structure type 1 Frame structure type 2

3, 4 in slot 0 of subframe 0 Normal cyclic prefix kHz 15=Δf 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 0 Extended cyclic prefix kHz 15=Δf 0, 1, 2 in slot 1 of subframe 0 3, 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) used for transmission of PDCCHs in a subframe.

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3GPP TS 36.211 V2.0.0 (2007-09)33Release 8

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 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( −= , 15,...,0=i , where )()( iy p represents the signal for antenna port p and where 1,...,0 −= Pp and the number of antenna ports { }4,2,1∈P .

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 be mapped 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 1 1 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

3GPP

3GPP TS 36.211 V2.0.0 (2007-09)34Release 8

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( tot −Mcc where ∑ −

==

10

)(bittot

PDCCHni

iMM .

6.8.3 Modulation The block of scrambled bits )1(),...,0( tot −Mcc shall be modulated as described in Section 7, resulting in a block of complex-valued modulation symbols )1(),...,0( symb −Mdd . 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 precoding The block of modulation symbols )1(),...,0( symb −Mdd 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 for

transmission, where )()( iy p represents 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, on antenna port p not used for reference signals, PHICH or PCFICH shall be in increasing order of first the index k and then the index l , where 1,...,0 −= Ll and 3≤L 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( bit −Mbb transmitted in one subframe shall be scrambled prior to modulation, resulting in a block of scrambled bits )1(),...,0( bit −Mcc .

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3GPP TS 36.211 V2.0.0 (2007-09)35Release 8

6.9.2 Modulation For transmission on one or two antenna ports, the block of scrambled bits )1(),...,0( bit −Mcc shall be bit-wise multiplied with an orthogonal sequence according to

)()()( PHICHSF icmwmNiz ⋅=+⋅

where

1,...,01,...,0

bit

PHICHSF

−=−=

MiNm

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 4PHICH

SF =N 0 1 2 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( symb −Mdd . 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( symb −Mdd 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 { }4,2,1∈P .

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 transmission

shall 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 prior to 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 OFDM symbols.

6.10 Reference signals Three types of downlink reference signals are defined:

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3GPP TS 36.211 V2.0.0 (2007-09)36Release 8

- Cell-specific reference signals, associated with non-MBSFN transmission

- MBSFN reference signals, associated with MBSFN transmission

- UE-specific reference signals (supported in frame structure type 2 only)

There is one reference signal transmitted per downlink antenna port.

6.10.1 Cell-specific reference signals Editor’s note: The reference signal description in this section is applicable to kHz 15=Δf only.

Cell-specific reference signals shall be transmitted in all downlink subframes in a cell supporting non-MBSFN transmission. In case the subframe is used for transmission with MBSFN, only the first two OFDM symbols in a subframe can be used for transmission of cell-specific reference symbols.

Cell-specific reference signals are transmitted on one or several of antenna ports 0 to 3.

6.10.1.1 Sequence generation

The generation of the two-dimensional reference signal sequence )( s, nr nm , where sn is the slot number within the radio frame, depends on the cyclic prefix used.

For normal cyclic prefix, )( s, nr nm is generated as the symbol-by-symbol product )()( sPRS,

OS,s, nrrnr nmnmnm ⋅= of a two-

dimensional orthogonal sequence OS,nmr and a two-dimensional pseudo-random sequence )( s

PRS, nr nm . There are 3OS =N

different two-dimensional orthogonal sequences and 170PRS =N different two-dimensional pseudo-random sequences. There is a one-to-one mapping between the three identities within the physical-layer cell identity group and the three two-dimensional orthogonal sequences such that orthogonal sequence }2,1,0{∈n corresponds to identity n within the physical-layer cell identity group in Section 6.11.1.1.

For extended cyclic length, )( s, nr nm is generated from a two-dimensional pseudo-random sequence )( sPRS, nr nm . There is

a one-to-one mapping between the physical-layer cell identity and the 510PRS =N different two-dimensional pseudo-random sequences.

6.10.1.1.1 Orthogonal sequence generation

The two-dimensional orthogonal sequence for normal cyclic prefix shall be generated according to

219,...,1,0 and 1,0 ,,, === mnsr nmOS

nm

The quantity nms , is the entry at the m:th row and the n:th column of the matrix iS , defined as

[ ] 2,1,0 ,...entries 74

== iSSSS Ti

Ti

Ti

Ti 444 3444 21

where

⎥⎥⎥

⎦

⎤

⎢⎢⎢

⎣

⎡

=⎥⎥⎥

⎦

⎤

⎢⎢⎢

⎣

⎡

=⎥⎥⎥

⎦

⎤

⎢⎢⎢

⎣

⎡=

3432

34

32

23234

32

34

10 11

,11

,111111

ππ

π

π

ππ

π

π

jj

j

j

jj

j

j

eee

eS

eee

eSS

for orthogonal sequence 0, 1, and 2, respectively. The orthogonal sequence to use is configured by higher layers.

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3GPP TS 36.211 V2.0.0 (2007-09)37Release 8

6.10.1.1.2 Pseudo-random sequence generation

The two-dimensional binary pseudo-random sequence is denoted )( sPRS, nr nm where sn is the slot number within a radio

frame.

6.10.1.2 Mapping to resource elements

The two-dimensional reference signal sequence )( s, nr nm shall be mapped to complex-valued modulation symbols )(,plka

used as reference symbols for antenna port p in slot sn according to

)( s,')(

, nra nmplk =

where

( )( )

{ }{ }{ }{ }⎪

⎪⎩

⎪⎪⎨

⎧

∈=−

∈=−∈=∈=

=

⎩⎨⎧

++++

=

3,2 and 1 if21,0 and 1 if33,2 and 0 if11,0 and 0 if0

2 typestructure framefor 6mod61 typestructure framefor 6mod6

DLsymb

DLsymb

shift

shift

pnNpnNpnpn

l

vvmvvm

k

and

{ }{ }{ }⎪

⎩

⎪⎨

⎧

∈∈∈

=

−+=

−⋅=

used is 2 typestructure frame and 3,2 if1,0used is 1 typestructure frame and 3,2 if0

1,0 if1,0110'

12,...,1,0DLRB

DLRB

ppp

n

Nmm

Nm

The variables v and shiftv define the position in the frequency domain for the different reference signals where v is given by

⎪⎪⎩

⎪⎪⎨

⎧

=+==+=

=

3 if)2mod(332 if)2mod(31 if330 if3

s

s

pnpnpnpn

v

for frame structure type 1 and by

⎪⎪⎩

⎪⎪⎨

⎧

=+==+=

=

3 if332 if31 if330 if3

pnpnpnpn

v

for frame structure type 2.

The cell-specific frequency shift { }5,...,1,0shift ∈v is derived from the physical-layer cell identity.

Resource elements ( )lk, used for reference signal transmission on any of the antenna ports in a slot shall not be used for any transmission on any other antenna port in the same slot and set to zero.

When the number of antenna ports configured for cell-specific reference signals equals four, the eNodeB can control in which subframes the reference signals for 3,2=p are transmitted.

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3GPP TS 36.211 V2.0.0 (2007-09)38Release 8

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

One

ant

enna

por

tTw

o an

tenn

a po

rtsFo

ur a

nten

na p

orts

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 ,element Resource

Figure 6.10.1.2-1. Mapping of downlink reference signals (frame structure type 1, normal cyclic prefix).

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3GPP TS 36.211 V2.0.0 (2007-09)39Release 8

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

One

ant

enna

por

tTw

o an

tenn

a po

rtsFo

ur a

nten

na p

orts

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,element Resource

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 of downlink reference signals (frame structure type 1, extended cyclic prefix).

3GPP

3GPP TS 36.211 V2.0.0 (2007-09)40Release 8

R0

R0

R0

R0

0=l 8=l

R0

R0

R0

R0

0=l 8=l

R1

R1

R1

R1

0=l 8=l

subframe

R0

R0

R0

R0

0=l 8=l

R1

R1

R1

R1

0=l 8=l

subframe

R2

R2

R2

R2

0=l 8=l

subframe

R3

R3

R3

R3

0=l 8=l

subframe

One

ant

enna

por

tTw

o an

tenn

a po

rtsFo

ur a

nten

na p

orts

Antenna port 0 Antenna port 1 Antenna port 2 Antenna port 3

( )lk,element Resource

Not used for transmission on this antenna port

Reference symbols on this antenna port

Figure 6.10.1.2-3. Mapping of downlink reference signals (frame structure type 2, normal cyclic prefix).

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3GPP TS 36.211 V2.0.0 (2007-09)41Release 8

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

One

ant

enna

por

tTw

o an

tenn

a po

rtsFo

ur a

nten

na p

orts

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,element Resource

Figure 6.10.1.2-4: Mapping of downlink reference signals (frame structure type 2, extended cyclic prefix).

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 kHz 15=Δf for frame structure type 1 and 2 respectively. In case of kHz 5.7=Δf 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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3GPP TS 36.211 V2.0.0 (2007-09)42Release 8

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, kHz 15=Δf )

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, kHz 15=Δf )

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3GPP TS 36.211 V2.0.0 (2007-09)43Release 8

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, kHz 5.7=Δf )

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, kHz 5.7=Δf )

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 reference signal is present and is a valid phase reference for PDSCH demodulation or not.

3GPP

3GPP TS 36.211 V2.0.0 (2007-09)44Release 8

6.10.3.1 Sequence generation

6.10.3.2 Mapping to resource elements

6.11 Synchronization signals There are 510 unique physical-layer cell identities. The physical-layer cell identities are grouped into 170 unique physical-layer cell-identity groups, each group containing three unique identities. The grouping is such that each physical-layer cell identity is part of one and only one physical-layer cell-identity group. A physical-layer cell identity is thus uniquely defined by a number in the range of 0 to 169, representing the physical-layer cell-identity group, and a number in the range of 0 to 2, representing the physical-layer identity within the physical-layer cell-identity group.

6.11.1 Primary synchronization signal

6.11.1.1 Sequence generation

The sequence used for the primary synchronization signal in a cell shall be selected from a set of three different sequences. There is a one-to-one mapping between the three physical-layer cell identities within the physical-layer cell-identity group and the three sequences used for the primary synchronization signal.

The sequence )(nd used for the primary synchronization signal is generated from a frequency-domain Zadoff-Chu sequence according to

⎪⎩

⎪⎨

⎧

=

== ++−

+−

61,...,32,31

30,...,1,0)(63

)2)(1(

63)1(

ne

nend nnuj

nunj

u π

π

where the Zadoff-Chu root sequence index u is given by Table 6.11.1.1-1.

Table 6.11.1.1-1: Root indices for the primary synchronization signal.

Physical-layer cell identity within the physical-layer cell-identity group Root index u 0 25 1 29 2 34

6.11.1.2 Mapping to resource elements

The mapping of the sequence to resource elements depends on the frame structure. The antenna port used for transmission of the primary synchronization signal is not specified.

For frame structure type 1, the primary 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 ,1 ,2

31 , DLsymb

RBsc

DLRB

, =−=⎥⎥⎦

⎥

⎢⎢⎣

⎢+−== nNl

NNnknda lk

Resource elements ),( lk in slots 0 and 10 where

66,...,63,62,1,...,4,5 ,1 ,2

31 DLsymb

RBsc

DLRB −−−=−=

⎥⎥⎦

⎥

⎢⎢⎣

⎢+−= nNl

NNnk

are reserved and not used for transmission of the primary synchronization signal.

For frame structure type 2, the primary synchronization signal is transmitted in the DwPTS field.

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3GPP TS 36.211 V2.0.0 (2007-09)45Release 8

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 p

l)( on

antenna port p in OFDM symbol l in a downlink slot is defined by

( ) ( )

⎣ ⎦

( )⎡ ⎤∑∑=

−Δ−

−=

−Δ ⋅+⋅= +−

2/

1

2)(,

1

2/

2)(,

)(RBsc

DLRB

s,CP)(

RBsc

DLRB

s,CP)(

NN

k

TNtfkjplk

NNk

TNtfkjplk

pl

ll eaeats ππ

for ( ) s,CP0 TNNt l ×+<≤ where ⎣ ⎦2RBsc

DLRB

)( NNkk +=− and ⎣ ⎦ 12RBsc

DLRB

)( −+=+ NNkk . The variable N equals 2048 for kHz 15=Δf subcarrier spacing and 4096 for kHz 5.7=Δf subcarrier spacing.

Table 6.12-1 lists the value of lN ,CP that shall be used for the two frame structures. Note that different OFDM symbols within a slot in some cases have different cyclic prefix lengths.

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3GPP TS 36.211 V2.0.0 (2007-09)46Release 8

Table 6.12-1: OFDM parameters.

Cyclic prefix length lN ,CP Configuration

Frame structure type 1 Frame structure type 2

Normal cyclic prefix kHz 15=Δf 0for 160 =l 6,...,2,1for 144 =l

8...,10for 256 ,,l =

kHz 15=Δf 5,...,1,0for 512 =l 7...,10for 544 ,,l = Extended cyclic prefix

kHz 5.7=Δf 2,1,0for 1024 =l 3...,10for 1088 ,,l =

6.13 Modulation and upconversion Modulation and upconversion to the carrier frequency of the complex-valued OFDM baseband signal for each antenna port 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 π

( )tf02sin π−

)()( 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 symbol x=I+jQ according 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 symbols x=I+jQ according to Table 7.2-1.

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3GPP TS 36.211 V2.0.0 (2007-09)47Release 8

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 symbols x=I+jQ according 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 64QAM In case of 64QAM modulation, hextuplets of bits, )5(),4(),3(),2(),1(),( +++++ ibibibibibib , are mapped to complex-valued modulation symbols x=I+jQ according to Table 7.4-1.

3GPP

3GPP TS 36.211 V2.0.0 (2007-09)48Release 8

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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3GPP TS 36.211 V2.0.0 (2007-09)49Release 8

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 example hereof is TDD, where only a subset of the slots in a radio frame is transmitted.

Downlink radio frame #i

Uplink radio frame #i

NTA×TS time units

Figure 8.1-1: Uplink-downlink timing relation

Annex A (informative): Change history

Change history Date TSG # TSG Doc. CR Rev Subject/Comment 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 editor’s version 0.1.1 0.1.2 2006-11-09 - - - Updated editor’s version 0.1.2 0.1.3 2006-11-10 - - - Endorsed by RAN1#47 0.1.3 0.2.0 2006-11-27 - - - Editor’s version, including decisions from RAN1#47 0.2.0 0.2.1 2006-12-14 - - - Updated editor’s version 0.2.1 0.2.2 2007-01-15 - - - Updated editor’s version 0.2.2 0.2.3 2007-01-19 - - - Endorsed by RAN1#47bis 0.2.3 0.3.0 2007-02-01 - - - Editor’s version, including decisions from RAN1#47bis 0.3.0 0.3.1 2007-02-12 - - - Updated editor’s version 0.3.1 0.3.2 2007-02-16 - - - Endorsed by RAN1#48 0.3.2 0.4.0 2007-02-16 - - - Editor’s version, including decisions from RAN1#48 0.4.0 0.4.1 2007-02-21 - - - Updated editor’s 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 - - - Editor’s version, including decisions from RAN1#48bis and RAN1 TDD Ad Hoc 1.0.0 1.0.1

2007-05-03 - - - - Updated editor’s version 1.0.1 1.0.2 2007-05-08 - - - - Updated editor’s version 1.0.2 1.0.3 2007-05-11 - - - - Updated editor’s version 1.0.3 1.0.4 2007-05-11 - - - - Endorsed by RAN1#49 1.0.4 1.1.0 2007-05-15 - - - - Editor’s version, including decisions from RAN1#49 1.1.0 1.1.1 2007-06-05 - - - - Updated editor’s version 1.1.1 1.1.2 2007-06-25 - - - - Endorsed by RAN1#49bis 1.1.2 1.2.0 2007-07-10 - - - - Editor’s version, including decisions from RAN1#49bis 1.2.0 1.2.1 2007-08-10 - - - - Updated editor’s version 1.2.1 1.2.2 2007-08-20 - - - - Updated editor’s version 1.2.2 1.2.3 2007-08-24 - - - - Endorsed by RAN1#50 1.2.3 1.3.0 2007-08-27 - - - - Editor’s version, including decisions from RAN1#50 1.3.0 1.3.1 2007-09-05 - - - - Updated editor’s version 1.3.1 1.3.2 2007-09-08 RAN#37 RP-070729 - - For approval at RAN#37 1.3.2 2.0.0