ETSI TS 101 376-5-5 V2.3.1 (2008-08)

ETSI TS 101 376-5-5 V2.3.1 (2008-08)
Technical Specification


GEO-Mobile Radio Interface Specifications (Release 2);
General Packet Radio Service;
Part 5: Radio interface physical layer specifications;
Sub-part 5: Radio Transmission and Reception;
GMPRS-1 05.005

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GMPRS-1 05.005 2 ETSI TS 101 376-5-5 V2.3.1 (2008-08)




Reference
RTS/SES-00303-5-5
Keywords
GMPRS, GMR, GPRS, GSM, GSO, interface,
MES, mobile, MSS, radio, satellite, S-PCN
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GMPRS-1 05.005 3 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

Contents
Intellectual Property Rights.5
Foreword.5
Introduction .6
1 Scope.7
2 References.7
2.1 Normative references.7
2.2 Informative references.8
3 Definitions, symbols and abbreviations .8
3.1 Definitions.8
3.2 Symbols.8
3.3 Abbreviations.9
4 Frequency bands and channel arrangement.9
4.1 Frequency bands and duplex method .9
4.2 RF carrier spacing and designation .9
4.3 RF carrier used for synchronization and spot beam selection .10
4.4 Frequency assignment to spot beams .11
5 Stability requirements.11
5.1 Frequency and symbol timing stability .11
5.1.1 Definition of operating conditions .11
5.1.2 Frequency and timing stability requirement .11
5.1.3 Frequency and timing stability requirements for packet data mode .11
5.2 Frequency switching time .11
5.3 MES time alignment accuracy.11
6 Transmitter characteristics .12
6.1 Power output characteristics and power class .12
6.2 Antenna radiation pattern .13
6.3 Transmit polarization .13
6.4 Carrier-off conditions.14
6.4a Carrier-standby conditions.14
6.5 Ramp-up and ramp-down.14
6.6 Power control range and accuracy.14
6.6.1 Approach.14
6.6.2 Procedures and timing .15
6.6.3 Range.15
6.6.4 Accuracy.15
6.6.5 Attenuation step size.15
6.6.6 Monotonicity.15
6.6.7 Initial power level P .15
init
6.7 Adjacent channel interference .15
6.7.1 Interference due to modulation .15
6.7.2 Interference due to switching transients.16
6.8 Unwanted emissions.16
6.8.1 Unwanted emissions in the carrier-on state and carrier-standby state .16
6.8.2 Unwanted emissions in the carrier-off state.16
7 Receiver characteristics.17
7.1 Receive antenna pattern.17
7.2 Receive polarization.17
7.3 Receiver figure of merit .17
7.4 Receiver sensitivity.17
7.4.1 Receiver BER in static conditions .18
7.4.2 Receiver BER in Rician fading.19
ETSI

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GMPRS-1 05.005 4 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

7.4.3 FER of logical channels.19
7.4.4 FER of PUI .20
7.5 Receiver selectivity .20
7.6 Receiver intermodulation.20
7.7 Receiver blocking characteristics .20
7.8 Receive signal strength.20
7.9 Erroneous frame Indication Performance.20
8 GPS receiver characteristics.21
Annex A (informative): Antenna factor equation.22
Annex B (normative): Environmental conditions .23
Annex C (normative): Channel model.24
Annex D (informative): Derivation of receiver sensitivity specifications .25
D.1 Introduction.25
D.2 Definitions.25
D.2.1 Integral sensitivity .25
D.2.2 Radiated sensitivity.26
D.2.3 Conducted sensitivity.26
D.3 Calculated parameters .27
Annex E (informative): Bibliography.32
History .33

ETSI

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GMPRS-1 05.005 5 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

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 (http://webapp.etsi.org/IPR/home.asp).
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 2.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 2); General 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";
Sub-part 2: "Multiplexing and Multiple Access; Stage 2 Service Description";
Sub-part 3: "Channel Coding";
Sub-part 4: "Modulation";
Sub-part 5: "Radio Transmission and Reception";
Sub-part 6: "Radio Subsystem Link Control";
Sub-part 7: "Radio Subsystem Synchronization";
Part 6: "Speech coding specifications";
Part 7: "Terminal adaptor specifications".
ETSI

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GMPRS-1 05.005 6 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

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 2 specifications. Release 2 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.).
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.
Due to the differences between terrestrial and satellite channels, some modifications to the GSM standard are necessary.
Some GSM specifications are directly applicable, whereas others are applicable with modifications. Similarly, some
GSM specifications do not apply, while some GMR specifications have no corresponding GSM specification.
Since GMR is derived from GSM, the organization of the GMR specifications closely follows that of GSM. The GMR
numbers have been designed to correspond to the GSM numbering system. All GMR specifications are allocated a
unique GMR number. This GMR number has a different prefix for Release 2 specifications as follows:
• Release 1: GMR-n xx.zyy.
• Release 2: GMPRS-n xx.zyy.
where:
- xx.0yy (z = 0) is used for GMR specifications that have a corresponding GSM specification. In this case,
the numbers xx and yy correspond to the GSM numbering scheme.
- xx.2yy (z = 2) is used for GMR specifications that do not correspond to a GSM specification. In this
case, only the number xx corresponds to the GSM numbering scheme and the number yy is allocated by
GMR.
- n denotes the first (n = 1) or second (n = 2) family of GMR specifications.
A GMR system is defined by the combination of a family of GMR specifications and GSM specifications as follows:
• If a GMR specification exists it takes precedence over the corresponding GSM specification (if any). This
precedence rule applies to any references in the corresponding GSM specifications.
NOTE: Any references to GSM 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
specification.
• If a GMR specification does not exist, the corresponding GSM specification may or may not apply. The
applicability of the GSM specifications is defined in GMPRS-1 01.201 [6].
ETSI

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GMPRS-1 05.005 7 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

1 Scope
The present document defines the performance requirements for the Mobile Earth Station (MES) radio transceiver for
the GMR-1 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
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[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".
[2] ETSI TS 101 376-5-4: "GEO-Mobile Radio Interface Specifications (Release 2) General Packet
Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 4: Modulation;
GMPRS-1 05.004".
[3] ETSI TS 101 376-5-6: "GEO-Mobile Radio Interface Specifications (Release 2) General Packet
Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 6: Radio Subsystem
Link Control; GMPRS-1 05.008".
ETSI

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GMPRS-1 05.005 8 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

[4] ETSI EN 301 681 (V1.3.2): "Satellite Earth Stations and Systems (SES); Harmonized 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 essential requirements under article 3.2 of the
R&TTE Directive".
[5] (ETSI TS 101 376-5-5) (V1.3.1): "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.
[6] ETSI TS 101 376-1-2: "GEO-Mobile Radio Interface Specifications (Release 2) General Packet
Radio Service; Part 1: General specifications; Sub-part 2: Introduction to the GMR-1 family;
GMPRS-1 01.201".
[7] ETSI EN 301 444 (V1.1.1): "Satellite Earth Stations and Systems (SES); Harmonized EN 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 under Article 3.2 of the R&TTE
directive".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
Not applicable.
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in GMPRS-1 01.201 [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: an 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: an MES is in this state when it transmits a signal (i.e. the carrier-on state corresponds to an active
transmission)
carrier-standby state: an 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)
3.2 Symbols
For the purposes of the present document, the following symbols apply:
E Average energy per bit in the wanted signal
b
E Average energy per symbol in the wanted signal
s
N Average channel noise (the noise power spectral density integrated over the channel bandwidth)
o
ETSI

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GMPRS-1 05.005 9 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

3.3 Abbreviations
For the purposes of the present document, the abbreviations given in GMPRS-1 01.004 [1] apply.
4 Frequency bands and channel arrangement
4.1 Frequency bands and duplex method
Same as clause 4.1 in GMR-1 05.005 [5] for circuit switched operation.
Clause 4.1 in GMR-1 05.005 [5] is also applicable for packet switched operation, except that 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 the L-band spectrum is divided into 1 087 paired carriers, with carrier spacing of 31,250 kHz.
Carrier pairs, N, are numbered from 1 through 1 087 (1 ≤ N ≤ 1 087) when operating in the L-band.
The centre frequency of the carriers in kHz corresponding to a carrier number is given by the expressions in table 4.1
for L-band.
Table 4.1: Carrier numbers for L-band
Carrier centre frequencies (kHz) Carrier number
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

The carrier number and centre frequency of the carriers are given in table 4.2. The RF channels are spaced at 31,25 kHz
intervals.
ETSI

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GMPRS-1 05.005 10 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

Table 4.2: Carrier numbers and frequencies
MES-RX centre frequency MES-TX centre frequency Carrier numbers (N)
(kHz) (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



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

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 subbands are used to support transmission symbol
rates that are multiples of the basic transmission 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 symbol 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 reserved Reserved
111 reserved Reserved

4.3 RF carrier used for synchronization and spot
beam selection
Same as clause 4.3 in GMR-1 05.005 [5].
ETSI

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GMPRS-1 05.005 11 ETSI TS 101 376-5-5 V2.3.1 (2008-08)

4.4 Frequency assignment to spot beams
Same as clause 4.4 in GMR-1 05.005 [5].
5 Stability requirements
5.1 Frequency and symbol timing stability
Same as clause 5.1 in GMR-1 05.005 [5].
5.1.1 Definition of operating conditions
Same as clause 5.1.1 in GMR-1 05.005 [5].
5.1.2 Frequency and timing stability requirement
Same as clause 5.1.2 in GMR-1 05.005 [5].
5.1.3 Frequency and timing stability requirements for packet data mode
In the tests of this clause, the MES shall be receiving the logical channel specified in table 5.1 and shall be transmitting
a PDCH logical 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 in
table 5.1 when the unit is receiving the logical channels given in the table E /N values listed in the table.
s o
Table 5.1: Frequency and timing stability requirements
Received logical Operational E /N RMS Frequency Error RMS timing error (µs)
s o
channel condition (Hz)
(dB)
(see note)
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
NOTE: The Steady State operational condition is defined in GM
...