ETSI TS 101 376-5-5 V3.5.1 (2017-03)

GEO-Mobile Radio Interface Specifications (Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 5: Radio Transmission and Reception; GMR-1 3G 45.005

RTS/SES-00427

General Information

• Status: Published
• Publication Date: 09-Mar-2017
• Technical Committee: SES SCN - Satellite Communications and Navigation
• Current Stage: 12 - Completion
• Due Date: 24-Feb-2017
• Completion Date: 10-Mar-2017
• Mandate: M/496

Standards Content (Sample)

TECHNICAL SPECIFICATION
GEO-Mobile Radio Interface Specifications (Release 3);
Third Generation Satellite Packet Radio Service;
Part 5: Radio interface physical layer specifications;
Sub-part 5: Radio Transmission and Reception;
GMR-1 3G 45.005
GMR-1 3G 45.005 2 ETSI TS 101 376-5-5 V3.5.1 (2017-03)

Reference
RTS/SES-00427
Keywords
3G, earth station, GMPRS, GMR, GPRS, GSM,
GSO, MES, mobile, MSS, radio, satellite
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ETSI
GMR-1 3G 45.005 3 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
3.4 Terminal Types (informative) . 10
4 Frequency bands and channel arrangement . 11
4.0 General . 11
4.1 Frequency bands and duplex method . 11
4.2 RF carrier spacing and designation . 12
4.3 RF carrier used for synchronization and spot beam selection . 14
4.4 Frequency assignment to spot beams . 14
5 Stability requirements. 14
5.1 Frequency and symbol timing stability . 14
5.1.0 General . 14
5.1.1 Definition of operating conditions . 14
5.1.2 Frequency and timing stability requirement . 14
5.1.3 Frequency and timing stability requirements for packet data . 14
5.2 Frequency switching time . 15
5.3 MES time alignment accuracy . 15
6 Transmitter characteristics . 15
6.1 Power output characteristics and power class . 15
6.1.0 General . 15
6.1.1 Average EIRP - Extreme Conditions . 16
6.1.2 Average EIRP - Normal Conditions . 16
6.1.3 Single Burst EIRP . 17
6.1.4 Access Burst EIRP . 17
6.2 Antenna radiation pattern . 17
6.2.0 General . 17
6.2.1 Boresight Oriented Radiation Patterns . 18
6.2.2 Non-Boresight Oriented Radiation Patterns . 18
6.3 Transmit polarization . 18
6.4 Carrier-off conditions . 19
6.4a Carrier-standby conditions . 19
6.5 Droop, ramp-up and ramp-down . 19
6.6 Power control range and accuracy . 20
6.6.1 Approach . 20
6.6.2 Procedures and timing . 20
6.6.3 Range . 20
6.6.4 Accuracy . 20
6.6.5 Attenuation step size . 21
6.6.6 Initial power level P . 21
init
6.7 Adjacent channel interference . 21
6.7.0 General . 21
6.7.1 Interference due to modulation . 21
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GMR-1 3G 45.005 4 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
6.7.2 Interference due to switching transie nts . 23
6.8 Unwanted emissions . 23
6.8.1 Unwanted emissions in the carrier-on state and carrier-standby state (L-band) . 23
6.8.2 Unwanted emissions in the carrier-off state (L-band) . 23
6.8.3 Unwanted emissions in the carrier-on state and carrier-standby state (S-Band) . 24
6.8.4 Unwanted emissions in the carrier-off state (S-band) . 24
6.9 Network Packet Burst EIRP Consistency . 24
7 Receiver characteristics . 24
7.1 Receive antenna pattern . 24
7.1.0 General . 24
7.1.1 Boresight Oriented Radiation Patterns . 24
7.1.2 Non-Boresight Oriented Radiation Patterns . 25
7.2 Receive polarization . 25
7.3 Receiver figure of merit . 25
7.4 Receiver sensitivity . 26
7.4.0 General . 26
7.4.1 Receiver Error Rates in static conditions . 27
7.4.2 Receiver BER in Rician fading (A/Gb mode only) . 29
7.4.3 FER of logical channels (A/Gb mode only) . 29
7.4.4 FER of PUI (A/Gb mode only) . 29
7.4.5 FER of PUI and ULMAP (Iu mode only) . 30
7.4.6 FER of Common Control Channels (system using FCCH3) . 30
7.5 Receiver selectivity . 30
7.6 Receiver intermodulation . 31
7.7 Receiver blocking characteristics . 31
7.7.1 L-Band . 31
7.7.2 S-Band . 31
7.8 Receive signal strength . 32
7.9 Erroneous frame Indication Performance . 33
7.10 Maximum Received Power Level . 33
8 GPS receiver characteristics . 33
Annex A (informative): Antenna factor equation . 34
Annex B (normative): Environmental conditions . 35
B.1 General . 35
B.2 Temperature . 35
B.3 Voltage . 35
B.4 Vibration . 35
Annex C (normative): Channel model. 36
Annex D (informative): Derivation of receiver sensitivity specifications . 37
D.1 Introduction . 37
D.2 Definitions . 37
D.2.0 General . 37
D.2.1 Integral sensitivity . 37
D.2.2 Radiated sensitivity . 38
D.2.3 Conducted sensitivity . 38
D.3 Parameters . 39
D.4 Calculations . 39
Annex E (informative): Bibliography . 41
History . 42

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GMR-1 3G 45.005 5 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is 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 IPR Policy, no investigation, 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.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Satellite Earth Stations and
Systems (SES).
The contents of the present document are subject to continuing work within TC-SES and may change following formal
TC-SES approval. Should TC-SES modify the contents of the present document it will then be republished by ETSI
with an identifying change of release date and an increase in version number as follows:
Version 3.m.n
where:
• the third digit (n) is incremented when editorial only changes have been incorporated in the specification;
• the second digit (m) is incremented for all other types of changes, i.e. technical enhancements, corrections,
updates, etc.
The present document is part 5, sub-part 5 of a multi-part deliverable covering the GEO-Mobile Radio Interface
Specifications (Release 3); Third Generation Satellite Packet Radio Service, as identified below:
Part 1: "General specifications";
Part 2: "Service specifications";
Part 3: "Network specifications";
Part 4: "Radio interface protocol specifications";
Part 5: "Radio interface physical layer specifications":
Sub-part 1: "Physical Layer on the Radio Path: General Description; GMR-1 3G 45.001";
Sub-part 2: "Multiplexing and Multiple Access; Stage 2 Service Description; GMR-1 3G 45.002";
Sub-part 3: "Channel Coding; GMR-1 3G 45.003";
Sub-part 4: "Modulation; GMR-1 3G 45.004";
Sub-part 5: "Radio Transmission and Reception; GMR-1 3G 45.005";
Sub-part 6: "Radio Subsystem Link Control; GMR-1 3G 45.008";
Sub-part 7: "Radio Subsystem Synchronization; GMR-1 3G 45.010";
Part 6: "Speech coding specifications";
Part 7: "Terminal adaptor specifications".
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GMR-1 3G 45.005 6 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
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.
Introduction
GMR stands for GEO (Geostationary Earth Orbit) Mobile Radio interface, which is used for Mobile Satellite Services
(MSS) utilizing geostationary satellite(s). GMR is derived from the terrestrial digital cellular standard GSM and
supports access to GSM core networks.
The present document is part of the GMR Release 3 specifications. Release 3 specifications are identified in the title
and can also be identified by the version number:
• Release 1 specifications have a GMR 1 prefix in the title and a version number starting with "1" (V1.x.x).
• Release 2 specifications have a GMPRS 1 prefix in the title and a version number starting with "2" (V2.x.x).
• Release 3 specifications have a GMR-1 3G prefix in the title and a version number starting with "3" (V3.x.x).
The GMR release 1 specifications introduce the GEO-Mobile Radio interface specifications for circuit mode Mobile
Satellite Services (MSS) utilizing geostationary satellite(s). GMR release 1 is derived from the terrestrial digital cellular
standard GSM (phase 2) and it supports access to GSM core networks.
The GMR release 2 specifications add packet mode services to GMR release 1. The GMR release 2 specifications
introduce the GEO-Mobile Packet Radio Service (GMPRS). GMPRS is derived from the terrestrial digital cellular
standard GPRS (included in GSM Phase 2+) and it supports access to GSM/GPRS core networks.
rd
The GMR release 3 specifications evolve packet mode services of GMR release 2 to 3 generation UMTS compatible
services. The GMR release 3 specifications introduce the GEO-Mobile Radio Third Generation (GMR-1 3G) service.
Where applicable, GMR-1 3G is derived from the terrestrial digital cellular standard 3GPP and it supports access to
3GPP core networks.
Due to the differences between terrestrial and satellite channels, some modifications to the GSM or 3GPP standard are
necessary. Some GSM and 3GPP specifications are directly applicable, whereas others are applicable with
modifications. Similarly, some GSM and 3GPP specifications do not apply, while some GMR specifications have no
corresponding GSM or 3GPP specification.
Since GMR is derived from GSM and 3GPP, the organization of the GMR specifications closely follows that of GSM
or 3GPP as appropriate. The GMR numbers have been designed to correspond to the GSM and 3GPP numbering
system. All GMR specifications are allocated a unique GMR number. This GMR number has a different prefix for
Release 2 and Release 3 specifications as follows:
• Release 1: GMR n xx.zyy.
• Release 2: GMPRS n xx.zyy.
• Release 3: GMR-1 3G xx.zyy.
Where:
- xx.0yy (z = 0) is used for GMR specifications that have a corresponding GSM or 3GPP specification. In
this case, the numbers xx and yy correspond to the GSM or 3GPP numbering scheme.
- xx.2yy (z = 2) is used for GMR specifications that do not correspond to a GSM or 3GPP specification. In
this case, only the number xx corresponds to the GSM or 3GPP numbering scheme and the number yy is
allocated by GMR.
- n denotes the first (n = 1) or second (n = 2) family of GMR specifications.
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GMR-1 3G 45.005 7 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
A GMR system is defined by the combination of a family of GMR specifications and GSM and 3GPP specifications as
follows:
• If a GMR specification exists it takes precedence over the corresponding GSM or 3GPP specification (if any).
This precedence rule applies to any references in the corresponding GSM or 3GPP specifications.
NOTE: Any references to GSM or 3GPP specifications within the GMR specifications are not subject to this
precedence rule. For example, a GMR specification may contain specific references to the corresponding
GSM or 3GPP specification.
• If a GMR specification does not exist, the corresponding GSM or 3GPP specification may or may not apply.
The applicability of the GSM and 3GPP specifications is defined in ETSI TS 101 376-1-2 [6].
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GMR-1 3G 45.005 8 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
1 Scope
The present document defines the performance requirements for the Mobile Earth Station (MES) radio transceiver for
the GMR-1 3G Mobile Satellite System.
Requirements are defined for two categories of parameters:
• Those that are required to provide compatibility among the radio channels, connected either to separate or
common antennas, which are used in the system. This category also includes parameters providing
compatibility with existing systems in the same or adjacent frequency bands.
• Those that define the transmission quality of the system.
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.
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 Release 7 or to the latest version of that document in the latest release
less than 7.
In the case of a reference to a GMR-1 3G document, a non-specific reference implicitly refers to the latest version of
that document in the same Release as the present document.
[1] ETSI TS 101 376-1-1: "GEO-Mobile Radio Interface Specifications (Release 2) General Packet
Radio Service; Part 1: General specifications; Sub-part 1: Abbreviations and acronyms;
GMPRS-1 01.004".
NOTE: This is a reference to a GMR-1 Release 2 specification. See the introduction for more details.
[2] ETSI TS 101 376-5-4: "GEO-Mobile Radio Interface Specifications (Release 3); Third Generation
Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 4:
Modulation; GMR-1 3G 45.004".
[3] ETSI TS 101 376-5-6: "GEO-Mobile Radio Interface Specifications (Release 3); Third Generation
Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 6:
Radio Subsystem Link Control; GMR-1 3G 45.008".
[4] ETSI EN 301 681: "Satellite Earth Stations and Systems (SES); Harmonised EN for Mobile Earth
Stations (MESs) of Geostationary mobile satellite systems, including handheld earth stations, for
Satellite Personal Communications Networks (S-PCN) in the 1,5/1,6 GHz bands under the Mobile
Satellite Service (MSS) covering the essential requirements of article 3.2 of the R&TTE
Directive".
[5] ETSI TS 101 376-5-5: "GEO-Mobile Radio Interface Specifications (Release 1); Part 5: Radio
interface physical layer specifications; Sub-part 5: Radio Transmission and Reception;
GMR-1 05.005".
NOTE: This is a reference to a GMR-1 Release 1 specification. See the introduction for more details.
ETSI
GMR-1 3G 45.005 9 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
[6] ETSI TS 101 376-1-2: "GEO-Mobile Radio Interface Specifications (Release 3); Third Generation
Satellite Packet Radio Service; Part 1: General specifications; Sub-part 2: Introduction to the
GMR-1 family; GMR-1 3G 41.201".
[7] ETSI EN 301 444: "Satellite Earth Stations and Systems (SES); Harmonised Standard for Land
Mobile Earth Stations (LMES) operating in the 1,5 GHz and 1,6 GHz bands providing voice
and/or data communications covering essential requirements of article 3.2 of the Directive
2014/53/EU".
[8] ETSI TS 101 376-5-7: "GEO-Mobile Radio Interface Specifications (Release 3); Third Generation
Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 7:
Radio Subsystem Synchronization; GMR-1 3G 45.010".
[9] ETSI TS 101 376-5-2: "GEO-Mobile Radio Interface Specifications (Release 3); Third Generation
Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 2:
Multiplexing and Multiple Access; Stage 2 Service Description; GMR-1 3G 45.002".
[10] ETSI EN 302 574-3: "Satellite Earth Stations and Systems (SES); Harmonised Standard for
satellite earth stations for MSS operating in the 1 980 MHz to 2 010 MHz (earth-to-space) and
2 170 MHz to 2 200 MHz (space-to- earth) frequency bands; Part 3: User Equipment (UE) for
narrowband systems: Harmonised EN covering the essential requirements of article 3.2 of the
Directive 2014/53/EU".
[11] ETSI TS 101 376-5-3: "GEO-Mobile Radio Interface Specifications (Release 3); Third Generation
Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 3:
Channel Coding; GMR-1 3G 45.003".
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.
Not applicable.
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in GMR-1 3G 41.201 [6] and the following
apply:
active transmission: defined as the combination of the ramp-up, ramp-down, and active burst transmission periods
average EIRP: burst EIRP averaged over at least 200 bursts
burst EIRP: instantaneous EIRP measured over 90 % of the active portion of a burst
carrier-off state: MES is in this state when it does not transmit any signal and it is more than 20 ms away from any
active transmission (i.e. the carrier-off state excludes the carrier-standby state)
carrier-on state: MES is in this state when it transmits a signal (i.e. the carrier-on state corresponds to an active
transmission)
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GMR-1 3G 45.005 10 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
carrier-standby state: MES is in this state when it does not transmit any signal but it is within 20 ms of the
carrier-on state (i.e. the carrier-standby state occurs for up to 20 ms immediately before, and up to 20 ms immediately
after the carrier-on state)
Terminal Type: alphabetic designator defining a terminal, as described in ETSI TS 101 376-5-2 [9]
Terminal Type Identifier: numerical identifier defining a terminal, as described in ETSI TS 101 376-5-2 [9]
NOTE: Each Terminal Type can have more than one associated Terminal Type Identifier.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
E Average energy per bit in the wanted signal
b
Average energy per symbol in the wanted signal
E
s
N Average channel noise (the noise power spectral density integrated over the channel bandwidth)
0x Prefix used for Hexadecimal representation of identifiers or numbers
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in GMPRS-1 01.004 [1] apply.
3.4 Terminal Types (informative)
Terminal Types and related Terminal Type Identifiers are defined in ETSI TS 101 376-5-2 [9]. The following
information is provided for information only and in the event of any conflict the definitions in ETSI TS 101 376-5-2 [9]
take precedence.
Terminals are defined throughout the present document in terms of Terminal Type Identifiers in Hexadecimal format.
Table 3.1 summarizes the relationship between Terminal Types and Terminal Type Identifiers.
Table 3.1: Terminal Types and Identifiers
Terminal Type Terminal Operating Antenna Notes
Identifier Type Band Radiation
(Hexadecimal) Pattern
Category
(see note)
0x9 C L B Handheld
0xA C L B Handheld
0xB C L B Handheld
0xC C L B Handheld
0xD D L B Portable - Internal Antenna
0xE D L B Portable - Passive Ext. Antenna
0xF D L B Portable - Active Ext. Antenna
0x10 E S N Handheld
0x11 E S N Handheld
0x12 E S N Handheld
0x15 F S N Handheld
0x1A G S N Handheld
0x1F H S B Vehicular
0x20 H S B Vehicular
0x24 I S B Fixed
0x25 I S B Fixed
0x29 J L N Handheld
0x2E K L N Handheld
0x33 L L N Handheld
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GMR-1 3G 45.005 11 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
Terminal Type Terminal Operating Antenna Notes
Identifier Type Band Radiation
(Hexadecimal) Pattern
Category
(see note)
0x38 M L B Fixed
0x3D N/A L N Handheld - Small
0x3E N/A L B Handheld - Smartphone
0x3F N/A L B Handheld - Rugged
0x40 N/A L B Asset Tracking
0x41 N/A L B Portable
0x42 N/A L B Semi-Fixed
0x43 N/A L B Vehicular
0x44 N/A L B Maritime
0x45 N/A L B Aeronautical
0x46 N/A L B Maritime - Small
0x47 N/A L B Vehicular - Small
0x48 A L B Fixed
0x49 N/A L B Aeronautical – Small
0x4A N/A S B Portable - Standard
0x4B N/A S B Portable - Standard
0x4C N/A S B Portable - High
0x4D N/A S B Portable - High
NOTE: Antenna radiation patterns are categorized as Boresight Oriented (B) or
Non-Boresight Oriented (N). Refer to clause 6.2 for more details.

4 Frequency bands and channel arrangement
4.0 General
GMR-1 operation is defined for L-Band and S-Band LMSS frequency allocations.
4.1 Frequency bands and duplex method
MESs operate in frequency division multiplexing (FDM) mode at L-band in two paired 34 MHz frequency bands,
which are allocated world-wide for land mobile satellite service (LMSS). The frequency bands are:
• MES receives: 1 525,0 MHz to 1 559,0 MHz;
• MES transmits: 1 626,5 MHz to 1 660,5 MHz.
In the FDM scheme, L-band downlink (forward) radio frequency (RF) carriers in the satellite-to-MES direction are
paired with L-band uplink (return) RF carriers in the MES-to-satellite direction at a frequency offset of 101,5 MHz for
circuit switched operation.
MESs operate at S-band frequencies, which are allocated world-wide for land mobile satellite service (LMSS). The
combined frequency bands are:
• MES receives (Space-to-Earth): 2 170,0 MHz to 2 200,0 MHz;
• MES transmits (Earth-to-Space): 1 980,0 MHz to 2 020,0 MHz.
MESs operate in a subset of these combined S-band frequencies as appropriate for the region of operation.
NOTE 1: In North America, current S-Band frequency allocations are the following subset of the combined
frequency bands: Space-to-Earth: 2 180 MHz to 2 200 MHz; Earth-to-Space: 2 000 MHz to 2 020 MHz.
NOTE 2: In Europe, current S-Band frequency allocations are the following subset of the combined frequency
bands: Space-to-Earth: 2 170 MHz to 2 200 MHz; Earth-to-Space; 1 980 MHz to 2 010 MHz.
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GMR-1 3G 45.005 12 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
For packet switched operation, the FDM scheme may be operated in full duplex with any downlink (forward) RF carrier
used with any uplink (return) RF carrier without necessarily having a fixed frequency offset between the two carriers.
4.2 RF carrier spacing and designation
The 34 MHz of L-band operating band is divided into 1 087 paired carriers, with carrier spacing of 31,250 kHz.
The 40 MHz of S-band spectrum in Earth-to-Space direction is divided into 1 280 carriers with carrier spacing of
31,250 kHz. The 30 MHz of S-Band spectrum in Space-to-Earth direction is divided into 960 carriers with carrier
spacing of 31,250 kHz.
Absolute Radio Frequency Channel Numbers (ARFCN), N, are assigned to each carrier pair and take the values from
1 through 1 087 (1 ≤ N ≤ 1 087) when operating in L-Band.
ARFCNs, N, are numbered from 1 through 1 280 (1 ≤ N ≤ 1 280) when operating in S-Band for Earth-to-Space and
from 1 through 960 (1 ≤ N ≤ 960) when operating in S-Band for Space-to-Earth.
The centre frequency of the carriers in kHz corresponding to an ARFCN is given by the expressions in table 4.1 for
L-band and in table 4.1a for S-band.
Table 4.1: ARFCNs for L-Band
Carrier centre frequencies (kHz) ARFCN
Mobile earth station receive 1 525 000,00 + 31,25 x N 1 ≤ N ≤ 1 087
Mobile earth station transmit 1 626 500,00 + 31,25 x N 1 ≤ N ≤ 1 087

Table 4.1a: ARFCNs for S-Band
Carrier centre frequencies (kHz) ARFCN
Mobile earth station receive 2 170 000,00 + 15,625 + 31,25 x (N - 1) 1 ≤ N ≤ 960
RX RX
Mobile earth station transmit 1 980 000,00 + 15,625 + 31,25 x (N - 1) 1 ≤ N ≤ 1 280
TX TX
The ARFCN and centre frequency of the carriers are given in table 4.2 for L-band and table 4.2a for S-band
Space-to-Earth and table 4.2b for S-band Earth-to-Space. The RF channels are spaced at 31,25 kHz intervals, which
provides 32 carriers per MHz.
Table 4.2: ARFCN and frequencies for L-Band
MES-RX centre MES-TX centre frequencies (kHz) ARFCN (N)
frequencies (kHz)
1 525 031,25 1 626 531,25 1
1 525 062,50 1 626 562,50 2
... ... ...
1 529 937,50 1 631 437,50 158
1 529 968,75 1 631 468,75 159
1 530 000,00 1 631 500,00 160
1 530 031,25 1 631 531,25 161
... ...
1 532 937,50 1 634 437,50 254
1 532 968,75 1 634 468,75 255
1 533 000,00 1 634 500,00 256
... ... ... ...
... ... ...
... ... ...
1 543 968,75 1 645 468,75 607
1 544 000,00 1 645 500,00 608
... ... ...
... ... ...
... ... ...
1 544 968,75 1 646 468,75 639
1 545 000,00 1 646 500,00 640
ETSI
GMR-1 3G 45.005 13 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
MES-RX centre MES-TX centre frequencies (kHz) ARFCN (N)
frequencies (kHz)
... ... ...
... ... ...
... ... ...
1 554 968,75 1 656 468,75 959
1 555 000,00 1 656 500,00 960
... ... ...
... ... ...
... ... ...
1 558 968,75 1 660 468,75 1 087

Table 4.2a: Receive ARFCNs and frequencies for S-Band
MES-RX centre frequency RX ARFCN (N )
RX
(kHz)
2 170 015,625 1
2 170 046,875 2
... ...
2 199 984,375 960
Table 4.2b: Transmit ARFCNs and frequencies for S-Band
MES-TX centre frequency TX ARFCN (N )
TX
(kHz)
1 980 015,625 1
1 980 046,875 2
... ...
2 009 984,375 960
... ...
2 019 984,375 1 280
MESs with Terminal Type Identifiers 0x4A through 0x4D shall support the frequency bands corresponding to TX and
RX ARFCNs 481 to 960, as defined in table 4.2a and table 4.2b.
The packet services use nominal transmission bandwidths that are multiples of the 31,25 kHz basic transmission
bandwidth. These different transmission bandwidths defined over the sub bands are used to support transmission
symbol rates that are multiples of the basic symbol rate of 23,4 ksps. A 3-bit bandwidth suffix is added to the AFRCN
to indicate the bandwidth and transmission rate of the modulated carrier. The association of transmission bandwidths to
transmission rates is given in table 4.3.
If the transmission bandwidth is an even multiple of 31,25 kHz, then the carrier frequency shall be shifted
by +15,625 kHz.
Table 4.3: Transmission bandwidth and associated transmission symbol rates
Bandwidth suffix Transmission bandwidth Transmission Symbol rate
(kHz) (ksps)
000 Reserved Reserved
001 31,25 23,4
010 62,50 46,8
011 Reserved Reserved
100 125,00 93,6
101 156,25 117,0
110 312,5 234,0
111 Reserved Reserved
ETSI
GMR-1 3G 45.005 14 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
4.3 RF carrier used for synchronization and spot
beam selection
MES synchronization to the BCCH carrier is defined in ETSI TS 101 376-5-6 [3] and ETSI TS 101 376-5-7 [8].
4.4 Frequency assignment to spot beams
L-band RF or S-band RF carriers are configured for each spot beam, depending on traffic demand, frequency reuse
considerations, and available spectrum as a result of coordination with other systems using the same spectrum. Any
RF channel can be used in any spot beam.
5 Stability requirements
5.1 Frequency and symbol timing stability
5.1.0 General
Same as clause 5.1 in ETSI TS 101 376-5-5 (Release 1) [5].
5.1.1 Definition of operating conditions
Same as clause 5.1.1 in ETSI TS 101 376-5-5 (Release 1) [5] for MESs operating in the L-band. For MESs operating in
the S-Band an appropriate S-band carrier frequency (fc) shall be applied to define Doppler frequency.
5.1.2 Frequency and timing stability requirement
Same as clause 5.1.2 in ETSI TS 101 376-5-5 (Release 1) [5].
5.1.3 Frequency and timing stability requirements for packet data
In the tests of this clause, the MES shall be receiving the logical channel specified in tables 5.1 or 5.2 and shall be
transmitting a PDCH or DCH channel. In all test cases, AWGN shall be used.
The rms frequency and symbol timing error of the transmitted signal from the MES shall not exceed the values given,
when the unit is receiving the channels defined with the E /N values listed in tables 5.1 (for MESs supporting FCCH)
s 0
and 5.2 (for MESs supporting FCCH3).
Table 5.1: Frequency and timing stability requirements
Received logical Operational E /N RMS Frequency Error RMS timing error (µs)
s 0
channel condition (Hz)
(dB)
(see note)
DCH (at 23,4 ksps) Steady State 3 10 0,9
PDCH (at 23,4 ksps) Steady State 5 10 0,9
PDCH (at 46,8 ksps) Steady State 5 10 0,9
PDCH (at 93,6 ksps) Steady State 5 10 0,9
PDCH (at 117,0 ksps) Steady State 5 10 0,9
PDCH (at 234,0 ksps) Steady State 5 10 0,9
NOTE: The Steady State operational condition is defined in ETSI TS 101 376-5-5 (Release 1) [5].

ETSI
GMR-1 3G 45.005 15 ETSI TS 101 376-5-5 V3.5.1 (2017-03)
Table 5.2: Frequency and timing stability requirements
Received logical Operational RMS Frequency Error RMS timing error (µs)
channel condition (Hz) (see note 2) (see note 2)
(see note 1)
DC12 Steady State 10 2,0
PNB3(1,3) Steady State 20 3,0
PNB3(1,6) Steady State 20 3,0
PNB(1,6) Steady State 10 1,5
PNB3(2,6) Steady State 10 1,5
PNB3(5,3) Steady State 10 1,5
PNB3(5,12) Steady State 10 1,5
PNB3(10,3) Steady State 10 1,0
NOTE 1: The Steady State operational condition is defined in ETSI TS 101 376-5-5 (Release 1) [5].
NOTE 2: These requirements apply at the sensitivity levels defined in clause 7.4.

5.2 Frequency switching time
Depending on the Terminal Type Identifier as follows:
• Terminal Type Identifiers (0x9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF, and 0x48): MESs shall be capable of
switching from any receive frequency to any other receive frequency in less than 1,6 ms and maintain the
frequency stability in clause 5.1. MESs shall be capable of switch
...