ETSI TS 103 636-3 V1.4.1 (2023-01)

DECT-2020 New Radio (NR); Part 3: Physical layer; Release 1

RTS/DECT-00377

General Information

• Status: Not Published
• Technical Committee: DECT - Digital Enhanced Cordless Telecommunications (DECT)
• Current Stage: 12 - Completion
• Due Date: 09-Jan-2023
• Completion Date: 16-Jan-2023

Standards Content (Sample)

TECHNICAL SPECIFICATION
DECT-2020 New Radio (NR);
Part 3: Physical layer;
Release 1
Release 1 2 ETSI TS 103 636-3 V1.4.1 (2023-01)

Reference
RTS/DECT-00377
Keywords
channel coding, DECT, DECT-2020, IMT-2020,
modulation, NR, OFDM, physical layer, radio

ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure Program:
https://www.etsi.org/standards/coordinated-vulnerability-disclosure
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
and/or governmental rule and/or regulation and further, no representation or warranty is made of merchantability or fitness
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2023.
All rights reserved.
ETSI
Release 1 3 ETSI TS 103 636-3 V1.4.1 (2023-01)

Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Physical layer principles . 8
4.1 General description of Physical layer . 8
4.2 Multiple access . 9
4.3 Numerologies . 9
4.4 Frame structure . 10
4.5 Physical resources . 11
5 Physical layer transmissions . 14
5.1 Transmission packet structure . 14
5.2 Physical resource mapping . 15
5.2.1 Guard Interval (GI) . 15
5.2.2 Synchronization Training Field (STF) . 15
5.2.3 Demodulation Reference Signal (DRS) . 15
5.2.4 Physical Control Channel (PCC) . 16
5.2.5 Physical Data Channel (PDC) . 17
5.3 Transport block size . 17
6 Generic procedures . 18
6.1 Channel coding, rate-matching and interleaving . 18
6.1.1 Overview . 18
6.1.2 CRC calculation . 19
6.1.3 Code block segmentation . 19
6.1.4 Channel coding . 21
6.1.4.1 Introduction . 21
6.1.4.2 Turbo coding . 21
6.1.4.2.1 Turbo encoder . 21
6.1.4.2.2 Trellis termination for turbo encoder . 22
6.1.4.2.3 Turbo code internal interleaver . 22
6.1.5 Rate matching . 23
6.1.5.1 Rate matching for turbo coded transport channels . 23
6.1.5.2 Sub-block interleaver . 24
6.1.5.3 Bit collection, selection and transmission . 25
6.1.6 Code block concatenation . 26
6.2 Pseudo-random sequence generation. 27
6.3 Modulation . 27
6.3.1 Symbol mapping . 27
6.3.1.1 Overview . 27
6.3.1.2 BPSK . 27
6.3.1.3 QPSK . 27
6.3.1.4 16-QAM . 27
6.3.1.5 64-QAM . 28
6.3.1.6 256-QAM . 28
6.3.1.7 1024-QAM . 28
6.3.2 Spatial multiplexing . 28
ETSI
Release 1 4 ETSI TS 103 636-3 V1.4.1 (2023-01)

6.3.3 Transmit stream mapping . 29
6.3.3.1 Transmit stream mapping for spatial multiplexing and for single antenna . 29
6.3.3.2 Transmit diversity precoding . 29
6.3.4 Beamforming and antenna port mapping . 30
6.3.5 OFDM signal generation . 33
6.3.6 Cyclic prefix insertion . 33
7 Transmission encoding . 33
7.1 Transmitter block diagram . 33
7.2 Transmission modes . 34
7.3 Synchronization Training Field (STF) beamforming . 34
7.4 Demodulation Reference Signal (DRS) beamforming . 35
7.5 Physical Control Channel (PCC) encoding . 35
7.5.1 Overall description . 35
7.5.2 CRC calculation . 35
7.5.2.1 Parity bit calculation . 35
7.5.2.2 CRC Masking for MIMO closed loop . 35
7.5.2.3 CRC Masking for beamforming . 36
7.5.2.4 CRC attachment . 36
7.5.3 Channel coding & rate matching . 36
7.5.4 Scrambling . 36
7.5.5 Symbol mapping . 36
7.5.6 Spatial multiplexing . 36
7.5.7 Transmit stream mapping . 36
7.5.8 Beamforming . 36
7.5.9 Subcarrier mapping . 36
7.6 Physical Data Channel (PDC) encoding . 37
7.6.1 Overall description . 37
7.6.2 CRC calculation . 37
7.6.3 Code block segmentation . 37
7.6.4 Channel coding & rate matching . 37
7.6.5 Code block concatenation . 37
7.6.6 Scrambling . 37
7.6.7 Symbol mapping . 38
7.6.8 Spatial multiplexing . 38
7.6.9 Transmit stream mapping . 38
7.6.10 Beamforming and antenna port mapping . 38
7.6.11 Subcarrier mapping . 38
Annex A (normative): Modulation and coding schemes . 39
Annex B (normative): Radio Device Capabilities . 40
B.1 Introduction . 40
B.2 Radio Device Capabilities . 40
Annex C (informative): Examples of transport block sizes and maximum achievable data
rates . 41
C.1 Introduction . 41
C.2 Single slot transmission, single spatial stream . 41
C.3 Dual slot transmission, single spatial stream . 44
C.4 Quad slot transmission, single spatial stream . 46
Annex D (informative): Change History . 48
History . 49

ETSI
Release 1 5 ETSI TS 103 636-3 V1.4.1 (2023-01)

Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Digital Enhanced Cordless
Telecommunications (DECT).
The present document is part 3 of a multi-part deliverable covering the DECT-2020 New Radio (NR) technology. Full
details of the entire series can be found in part 1 [1].
DECT-2020 NR is recognized in Recommendation ITU-R M.2150 [i.1] as a component RIT fulfilling the IMT-2020
requirements of the IMT-2020 use scenarios URLLC and mMTC. The Set of Radio Interface Technology (SRIT) called
"DECT 5G SRIT" is involving 3GPP NR and DECT-2020 NR.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
Release 1 6 ETSI TS 103 636-3 V1.4.1 (2023-01)

1 Scope
The present document is one of the parts of the specification of the DECT-2020 New Radio (NR).
The present document specifies the Physical layer and interaction between PHY and MAC layer.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 103 636-1: "DECT-2020 New Radio (NR); Part 1: Overview; Release 1".
[2] ETSI TS 103 636-2: "DECT-2020 New Radio (NR); Part 2: Radio reception and transmission
requirements; Release 1".
[3] ETSI TS 103 636-4: "DECT-2020 New Radio (NR); Part 4: MAC layer; Release 1".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] Recommendation ITU-R M.2150: "Detailed specifications of the terrestrial radio interfaces of
International Mobile Telecommunications-2020 (IMT-2020)".
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
ETSI
Release 1 7 ETSI TS 103 636-3 V1.4.1 (2023-01)

3.2 Symbols
For the purposes of the present document, the following symbols apply:
∀ Mathematical notation for "for all"
⋀ Mathematical notation for "and"
⌊ ⌋
� Mathematical notation for "floor of x" i.e. rounding towards zero
⌈�⌉ Mathematical notation for "ceiling of x" i.e. rounding towards infinity
� Fourier transform scaling factor
� Subcarrier scaling factor
�
Δ Subcarrier spacing for given subcarrier scaling factor
�
�,�
� Sample frequency
�
�
� Occupied subcarriers for given transform scaling factor
���
�,�
� Nominal bandwidth
���
�,�
� Transmission bandwidth
��
�
�� Guard interval for given subcarrier scaling factor
������
� Number of modulated symbols in a spatial stream
����
� Number of modulated symbols
����
�
� Cyclic Prefix size for given transform scaling factor
��
��
� Number of symbols in Data Field
����
(������)
� Number of symbols in Guard Interval and STF combined
����
�
� Discrete Fourier Transform size for given Fourier transform scaling factor
���
�
� Number of occupied subcarriers for given Fourier transform scaling factor
���
���
� Number of DRS resource elements
��
���
� Number of PCC resource elements
��
���
� Number of PDC resource elements
��
����
� Number OFDM symbols in a slot
����
����
� Number of subslots in a slot
�������
�����
� Number of slots in a frame
����
������
� Number of OFDM symbols in a transmission packet
����
� Number of transmission antennas
��
���
� Effective number of transmission antennas
��
� Number of transmit streams
��
� Number of spatial streams
��
� Number of bits per symbol for given modulation
� �
� Duration of a frame
�����
� Duration of a slot
����
�,�
� Sample time interval
�
�
� Duration of OFDM symbol for given subcarrier scaling factor
����
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI TS 103 636-1 [1] and the following apply:
NOTE: An abbreviation defined in the present document takes precedence over the definition of the same
abbreviation, if any, in ETSI TS 103 636-1 [1].
ARQ Automatic Repeat reQuest
BPSK Binary Phase Shift Keying
CP Cyclic Prefix
CRC Cyclic Redundancy Check
DC Zero or DC Subcarrier
DECT Digital Enhanced Cordless Telecommunications
DF Data Field
DFT Discrete Fourier Transform
DRS Demodulation Reference Signal
ETSI
Release 1 8 ETSI TS 103 636-3 V1.4.1 (2023-01)

FDMA Frequency Division Multiple Access
GF Galois Field
GI Guard Interval
HARQ Hybrid ARQ
MAC Medium Access Control
OFDM Orthogonal Frequency Division Multiplexing
PCC Physical Control Channel
PCCC Parallel Concatenated Convolutional Code
PDC Physical Data Channel
PDU Protocol Data Unit
PHY Physical layer
QAM Quadrature Amplitude Modulation
QPSK Quadrature Phase Shift Keying
RD Radio Device
SAP Service Access Point
SS Spatial Stream
STF Synchronization Training Field
TDD Time Division Duplex
TDMA Time Division Multiple Access
TS Transmit Stream
TX Transmission
4 Physical layer principles
4.1 General description of Physical layer
Logical channels
Layer 2
Medium Access Layer (MAC)
MAC PDU
Layer 1
Physical Layer
Figure 4.1-1: Radio interface protocol architecture around the Physical layer
Figure 4.1-1 shows the DECT-2020 NR radio interface protocol architecture around the Physical layer (PHY). The
physical layer interfaces the Medium Access Control (MAC) layer. The circles between different layer/sub-layers
indicate Service Access Points (SAPs). The physical layer offers Physical Control Channel (PCC) and Physical Data
Channel (PDC) to transmit MAC PDU(s). Different physical channels are characterized by how the information is
transferred over the radio interface within single transmission packet.
The physical layer performs the following functions in order to provide the data transport service:
• Error detection on the physical channels and indication to higher layers
• FEC encoding/decoding of the physical channels
• Hybrid ARQ soft-combining
• Rate matching of the coded physical channel data to physical channels
• Mapping of the coded physical channel data onto physical channels
• Modulation and demodulation of physical channels
• Frequency and time synchronization
ETSI
Release 1 9 ETSI TS 103 636-3 V1.4.1 (2023-01)

• Radio characteristics measurements and indication to higher layers
• Multiple Input Multiple Output (MIMO) antenna processing
• Transmit Diversity (TX diversity)
• Beamforming
The physical channels defined are:
• the Physical Control Channel (PCC);
• the Physical Data Channel (PDC).
The modulation schemes supported are:
• BPSK;
• QPSK;
• 16-QAM;
• 64-QAM;
• 256-QAM; and
• 1024-QAM.
The channel coding in all of the physical channels is turbo coding with a rate 1/3 mother code punctured to the coderate
of the channel or the selected MCS according to Table A-1. Trellis termination is used for the turbo coding. Before the
turbo coding, transport blocks are segmented into byte aligned segments with a maximum codeblock size. Error
detection is supported by the use of 16 or 24 bit CRC as specified for a given physical channel.
4.2 Multiple access
The multiple access scheme for the DECT-2020 NR physical layer is based on Time Division Duplex (TDD) combined
with Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA). The physical layer
operates with non-overlapping channels in frequency domain and non-overlapping transmission slots in time domain.
Radio channel spacing is defined in ETSI TS 103 636-2 [2].
The modulation within the transmitted packets is Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic
Prefix (CP).
Both frame duration (10 ms) and slot duration (0,41667 ms) ensure coexistence with legacy DECT systems.
4.3 Numerologies
In the present document, unless otherwise noted, the size of various fields in the time domain are expressed in terms of
basic parameters. Subcarrier spacing is defined by the subcarrier scaling factor �, resulting either in 27 kHz, 54 kHz,
�
108 kHz or 216 kHz OFDM subcarriers spacing Δ . In addition, the Fourier transform scaling factor � can be set to
�
allow different transmission bandwidths for each configuration of the subcarrier spacing. The numerologies listed in
�,�
table 4.3-1 support multiple throughput and latency configurations for the network. In the table � denotes the
���
�,� �
nominal bandwidth, � denotes the transmission bandwidth consisting of � occupied subcarriers and the empty DC
�� ���
�,� �
carrier in the center of the transmission bandwidth, � denotes the critical sample rate, � the Fourier transform
�
���
�
size, � denotes the cyclic prefix size in samples.
��
ETSI
Release 1 10 ETSI TS 103 636-3 V1.4.1 (2023-01)

Table 4.3-1: Supported transmission numerologies
�,� �,� � � � �,�
�
� [kHz] � � � � � [kHz]
�
��� ��� �� ��� ��
�
1 1 1 728 5,7870E-07 64 8 56 1 539
�
� [kHz] 27 2 3 456 2,8935E-07 128 16 112 3 051
�
�
� [us]
41,667 4 6 912 1,4468E-07 256 32 224 6 075
����
����,�
� 10 8 13 824 7,2338E-08 512 64 448 12 123
����
����,�
� 2 12 20 736 4,8225E-08 768 96 672 18 171
�������
�
�� [us] 18,52 16 27 648 3,6169E-08 1 024 128 896 24 219
�,� �,� � � � �,�
�
� [kHz] � � � � � [kHz]
��� � ��� �� ��� ��
�
2 1 3 456 2,8935E-07 64 8 56 3 078
�
� [kHz]
54 2 6 912 1,4468E-07 128 16 112 6 102
�
�
� [us] 20,833 4 13 824 7,2338E-08 256 32 224 12 150
����
����,�
� 20 8 27 648 3,6169E-08 512 64 448 24 246
����
����,�
4 12 41 472 2,4113E-08 768 96 672 36 342
�
�������
�
�� [us]
20,83 16 55 296 1,8084E-08 1 024 128 896 48 438
�,� �,� � � � �,�
�
� [kHz] � � � � � [kHz]
�
��� ��� �� ��� ��
�
4 1 6 912 1,4468E-07 64 8 56 6 156
�
� [kHz] 108 2 13 824 7,2338E-08 128 16 112 12 204
�
�
� [us]
10,417 4 27 648 3,6169E-08 256 32 224 24 300
����
����,�
40 8 55 296 1,8084E-08 512 64 448 48 492
�
����
����,�
� 8 12 82 944 1,2056E-08 768 96 672 72 684
�������
�
�� [us] 10,42 16 110 592 9,0422E-09 1 024 128 896 96 876
�,� �,� � � � �,�
�
� [kHz] � � � � � [kHz]
��� � ��� �� ��� ��
�
8 1 13 824 7,2338E-08 64 8 56 12 312
�
� [kHz]
216 2 27 648 3,6169E-08 128 16 112 24 408
�
�
� [us] 5,208 4 55 296 1,8084E-08 256 32 224 48 600
����
����,�
� 80 8 110 592 9,0422E-09 512 64 448 96 984
����
����,�
16 12 165 888 6,0282E-09 768 96 672 145 368
�
�������
�
�� [us]
10,42 16 221 184 4,5211E-09 1 024 128 896 193 752

4.4 Frame structure
�����
The radio frame has a duration of � = 10 �� and consists of � = 24 slots with a slot duration of
�����
����
� = 0,41667 �� as depicted in figure 4.4-1.
����
Figure 4.4-1: DECT-2020 NR frame structure
����,�
Each slot consists of � = 10, 20, 40 or 80 OFDM symbols depending on subcarrier scaling factor �. Slot is
����
����,�
further divided into � subslots according to the table 4.3-1 for each subcarrier scaling �. Packet transmission
�������
duration is integer multiple of subslots.
ETSI
Release 1 11 ETSI TS 103 636-3 V1.4.1 (2023-01)

Basic channel width is 1,728 MHz. Multiple adjacent basic channels can be aggregated with � and � to form a wider
transmission bandwidth ranging from 1,728 MHz to 221,184 MHz. Channel raster and numbering is specified in ETSI
TS 103 636-2 [2].
4.5 Physical resources
Physical resources are mapped to resource elements (�,�,�) , where � may denote either transmit stream or spatial
�
stream index, � denotes the subcarrier index and � denotes the OFDM symbol position in the time domain relative to the
start of the transmission packet as depicted in figure 4.5-1. The occupied subcarriers indices are:
� �
! !
�
��� ���
� = �− ,⋯,−1,1,⋯, � ,
���
" "
�
Where the � is given by Table 4.3-1.The remaining subcarriers are the guard bands and the zero carrier (or DC
���
carrier) which are not used for data transmission. Example of resource mappings are depicted in figures 4.5-2 and 4.5-3.

Figure 4.5-1: Resource grid and indexing
ETSI
Release 1 12 ETSI TS 103 636-3 V1.4.1 (2023-01)

l l l l l l
01234 0 1 2 3 456 789 0 1 2 3 4567 89
k o k o k o
31 31 31
30 30 30
29 29 29
28 55 28 55 28 55 1
27 54 27 54 0 27 54 0
26 53 26 53 26 53
0 0 0
25 52 25 52 25 52
24 51 24 51 24 51
0 0
23 50 23 50 23 50
22 49 22 49 22 49
0 0 0
21 48 21 48 21 48
20 47 20 47 20 47
0 0
19 46 19 46 19 46
18 45 18 45 18 45
0 0 0
17 44 17 44 17 44
16 43 16 43 16 43
0 0
15 42 15 42 15 42
14 41 14 41 14 41 1
13 40 0 13 40 0 13 40 0
12 39 12 39 12 39
0 0
11 38 11 38 11 38
10 37 10 37 10 37
0 0 0
936 936 936
835 8 35 8 35
0 0
734 7 34 734
633 6 33 6 33
0 0 0
532 532 532
431 4 31 4 31
0 0
330 3 30 330
229 2 29 2 29
0 0 0
128 128 128
00 0
-1 27 -1 27 -1 27 1
-2 26 -2 26 0 -2 26 0
-3 25 -3 25 -3 25
0 0 0
-4 24 -4 24 -4 24
-5 23 -5 23 -5 23
0 0
-6 22 -6 22 -6 22
-7 21 -7 21 -7 21
0 0 0
-8 20 -8 20 -8 20
-9 19 -9 19 -9 19
0 0
-10 18 -10 18 -10 18
-11 17 -11 17 -11 17
0 0 0
-12 16 -12 16 -12 16
-13 15 -13 15 -13 15
0 0
-14 14 -14 14 -14 14
-15 13 -15 13 -15 13 1
-16 12 0 -16 12 0 -16 12 0
-17 11 -17 11 -17 11 1
-18 10 -18 10 0 -18 10 0
-19 9 -19 9 -19 9
0 0 0
-20 8 -20 8 -20 8
-21 7 -21 7 -21 7
0 0
-22 6 -22 6 -22 6
-23 5 -23 5 -23 5
0 0 0
-24 4 -24 4 -24 4
-25 3 -25 3 -25 3
0 0
-26 2 -26 2 -26 2
-27 1 -27 1 -27 1
0 0 0
-28 0 -28 0 -28 0
-29 -29 -29
-30 -30 -30
-31 -31 -31
-32 -32 -32
a) b) c)
Synchronization Training Field Allocation
Demodulation Reference Signal Allocation
Physical Control Channel Allocaton
Physical Data Channel Allocation
Unallocated Guard or Empty Resource

� �
Figure 4.5-2: Resource mapping for �,� =(∗,�)
a) Transmission from single effective antenna of one subslot duration
b) Transmission from single effective antenna of two subslots duration
c) Transmission from two effective antennas of two subslots duration
ETSI
Release 1 13 ETSI TS 103 636-3 V1.4.1 (2023-01)

l l l l
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
k o k o
31 31
30 30
29 29
28 55 3 1 28 55 3715
27 5420 27 54 26 0 4
1 3 15 3 7
26 53 26 53
02 0 4 26
25 52 25 52
3 1 3715
24 51 24 51
20 26 0 4
23 50 23 50
1 3 15 3 7
22 49 22 49
02 0 4 26
21 48 21 48
3 1 3715
20 47 20 47
20 26 0 4
19 46 19 46
1 3 15 3 7
18 45 18 45
02 0 4 26
17 44 17 44
3 1 3715
16 43 16 43
20 26 0 4
15 42 15 42
14 41 1 3 14 41 15 3 7
13 4002 13 40 0 4 26
3 1 3715
12 39 12 39
20 26 0 4
11 38 11 38
1 3 15 3 7
10 37 10 37
02 0 4 26
936 936
3 1 3715
835 835
20 26 0 4
734 734
1 3 15 3 7
633 633
02 0 4 26
532 532
3 1 3715
431 431
20 26 0 4
330 330
1 3 15 3 7
229 229
02 0 4 26
128 128
0 0
-1 27 3 1 -1 27 3715
-2 2620 -2 26 26 0 4
1 3 15 3 7
-3 25 -3 25
02 0 4 26
-4 24 -4 24
3 1 3715
-5 23 -5 23
20 26 0 4
-6 22 -6 22
1 3 15 3 7
-7 21 -7 21
02 0 4 26
-8 20 -8 20
3 1 3715
-9 19 -9 19
20 26 0 4
-10 18 -10 18
1 3 15 3 7
-11 17 -11 17
02 0 4 26
-12 16 -12 16
3 1 3715
-13 15 -13 15
20 26 0 4
-14 14 -14 14
-15 13 1 3 -15 13 15 3 7
-16 1202 -16 12 0 4 26
-17 11 3 1 -17 11 3715
-18 1020 -18 10 26 0 4
1 3 15 3 7
-19 9 -19 9
02 0 4 26
-20 8 -20 8
3 1 3715
-21 7 -21 7
20 26 0 4
-22 6 -22 6
1 3 15 3 7
-23 5 -23 5
02 0 4 26
-24 4 -24 4
3 1 3715
-25 3 -25 3
20 26 0 4
-26 2 -26 2
1 3 15 3 7
-27 1 -27 1
02 0 4 26
-28 0 -28 0
-29 -29
-30 -30
-31 -31
-32 -32
d) e)
Synchronization Training Field Allocation
Demodulation Reference Signal Allocation
Physical Control Channel Allocaton
Physical Data Channel Allocation
3 Unallocated Guard or Empty Resource

� �
Figure 4.5-3: Resource mapping for �,� =(∗,�)
d) Transmission from four effective antennas of four subslots duration
e) Transmission from eight effective antennas of four subslots duration
ETSI
Release 1 14 ETSI TS 103 636-3 V1.4.1 (2023-01)

5 Physical layer transmissions
5.1 Transmission packet structure
DECT-2020 NR transmission packet consists of Synchronization Training Field (STF), Data Field (DF) and Guard
Interval (GI) as depicted in figures 5.1-1, 5.1-2 and 5.1-3, where STF consists of 7 or 9 periodic repetitions of sequence
�
S, and Data Field consists of a number of OFDM symbols D each with Cyclic Prefix CP. OFDM symbol length �
����
is dependent on the subcarrier scaling factor � as shown in table 4.3-1. STF transmission starts at transmission
allocation boundary. SFT is purposefully constructed to create time domain repetitive pattern for receiver gain, timing
and frequency acquisition. DF carries Demodulation Reference Signal (DRS), Physical Control Channel (PCC) and
Physical Data Channel (PDC). GI in the end of the packet allows transmission-reception and reception-transmission
turnaround and to avoid overlapping transmissions from adjacent TDMA timeslots.
Transmission packet length in OFDM symbols is:
����,� ����,�
������
if �����������ℎ���� =0 ⇒ � = �����������ℎ∗ � /�
����
���� �������
����,�
������
if �����������ℎ���� =1 ⇒ � = �����������ℎ∗ �
����
����
depending whether PacketLengthType in Physical Header ETSI TS 103 636-4 [3], clause 6.2.1 indicates that the packet
length is specified in terms of slots or subslots. The transmission packet length contains GI duration.
���
For � ≥4 transmission length should be at least three subslots (15 OFDM symbols) to accomodate second set of
��
demodulation reference signals for time variant channel and frequency error estimation.

� �
Figure 5.1-1: Packet structure for � = �

� �
Figure 5.1-2: Packet structure for � = �,�

Figure 5.1-3: Packet structure for � = ���
ETSI
Release 1 15 ETSI TS 103 636-3 V1.4.1 (2023-01)

NOTE: For the highest subcarrier scaling the 4-bit packet length specifier allows packet length scaling from 5 to
80 OFDM symbols when packet length is specified in subslots, and up to 1 280 OFDM symbols when
length is specified in slots.
5.2 Physical resource mapping
5.2.1 Guard Interval (GI)
GI in the end of the packet allows transmission-reception and reception-transmission turnaround and to avoid
�
��� � ����,��
overlapping transmissions from adjacent timeslots. Guard intervals are of length �� = ∙� , �� =1∙
����
�
� �
���
� and �� =2∙ � for subcarrier scaling factors � = �1,2,4,8�, respectively. Guard interval duration in �� is
���� ����
listed in table 4.3-1 for each subcarrier scaling.
5.2.2 Synchronization Training Field (STF)
Synchronization training signal is mapped into resource elements:
�
�
� ���
� � �
�,� ,�� = �0,� � ∙4 ,0 , ∀ � =0,…, −1
�
���
and
� � � �
� � � �
� ��� ��� ��� ���
��,� ,�� = !0,� " +3+(� − )∙4#,0$ , ∀ � = ,…, −1
�
���
2 8 8 4
Thus, synchronization training is always in transmit stream � =0 and in OFDM symbol � =0 on every fourth
subcarrier starting from the lowest occupied negative subcarrier but excluding the DC carrier.
EXAMPLE: The occupied STF subcarriers for DFT size 64 are [-28, -24, -20, -16, -12, -8, -4, 4, 8, 12, 16, 20,
24, 28] as depicted in figure 4.5-2.
!",�
" "
# ! ,� ! ,�
Define � ��� = �−1� � �� − �� for all �  =  1, …, �����ℎ�� which flips the vector elements and
�
alternates sign of every other element. The STF sequences are defined as:

!",��� $%/�
� �
� = � 1, −1,1,1, −1,1,1, −1,1,1,1, −1, −1, −1
"
! ,��� &’/�
� �
� = � −1,1, −1,1,1, −1,1,1, −1,1,1,1, −1,1, −1, −1, −1,1, −1, −1, −1,1,1,1, −1, −1, −1, −1
�0�,(=4 jπ/4
� = � {−1,−1,−1,1,−1,1,−1,−1,1,1,1,1,−1,1,−1,−1,−1,1,−1,1,1,−1,−1,−1,−1,−1,1,−1,

1, 1, 1, −1, 1, −1, 1, 1, −1, −1, −1, −1, 1, −1, −1, −1, −1, 1, −1, 1, 1, −1, −1, −1, −1, −1, 1, −1}
!",���
!",��� !",���
� = %� , � &
�
"
! ,���
!",���) !",���
� = %� ; � &
�
"
(!),���� ! ,���)
� � � �
� i = � � +2∗14 ,� = 0,1,…,12 ∗ 14 − 1
5.2.3 Demodulation Reference Signal (DRS)
Demodulation reference signals are allocated to the transmit streams according to the number of transmit streams � .
��
DRS is transmitted on the resource elements:
�
� � � � � � � ⌊⁄⌋
�,� ,�� = ��,� � ∙4 + � + � mod 2 ∙2 mod 4 ,1 + � 4 + � ∙� ,
� ���*
���
� ������
+
+
����
���
∀ � =0,…, −1 ,� =0,…,* + −1
� +
����
ETSI
Release 1 16 ETSI TS 103 636-3 V1.4.1 (2023-01)

���
5,�- � ≤2
��
� = , ,
���*
���
10,�- � ≥4
��
where � is the transmit stream index.
EXAMPLE: Thus the pilot carriers for DFT size of 64 and for � =0 are [-28, -24, -20, -16, -12, -8, -4, 1, 5, 9,
13, 17, 21, 25], for OFDM symbols 1+ � ∙ � ∀ � ./0 2 = 0 and [-26, -22, -18, -14, -10,
���*
-6, -2, 3, 7, 11, 15, 19, 23, 27] for 1+� ∙� ∀ � ./0 2 = 1 as depicted in figure 4.5-2.
���*
Signal transmitted on DRS subcarrier � is:
�
�
�
� � ⁄
� 4∙� + t mod 4 ∀ � =0,…,� 4−1 ⋀ t ≤4
,-�,(�)
���
� = 1 ,
�
�
�
−� �4∙� + t mod 4� ∀ � =0,…,� ⁄4 − 1 ⋀ t > 4
���
where the base sequences are defined as:
���
�
� = 1,1,1,1,−1,1,1,−1,−1,1,1,1,1,−1,1,−1,1,1,−1,1,−1,1,−1,1,1,1,1,1, − 1,1,

�
−1,−1,1,1,−1,−1,−1,−1,1,−1,−1,−1,−1,−1,1,1,1,−1,1,1,−1,−1,1,−1,−1,−1
��� ��� ���
� = 2� ,� 3
��� ��� ���
� = 2� ,� 3
��� ��� ���
� = 2� ,� 3
���� ��� ��� ���
� = 2� ,� ,� 3
���) ��� ���
� = 2� ,� 3
5.2.4 Physical Control Channel (PCC)
���
PCC is mapped to spatial stream 0 to the � =98 resource elements starting from OFDM symbol � =1 and to the
��
resource elements which are not already occupied by DRS in any transmit stream. The procedure for resource element
allocation for PCC is defined with steps:
�./���0
1) Start from OFDM symbol � =1 and set � =98.
��
2) Starting from the lowest subcarrier of the OFDM symbol �, select the subcarriers whic
...