1、 Rec. ITU-R M.1343-1 1 RECOMMENDATION ITU-R M.1343-1*Essential technical requirements of mobile earth stations for global non-geostationary mobile-satellite service systems in the bands 1-3 GHz (Question ITU-R 210/8) (1997-2005) Scope This Recommendation provides the essential technical requirements
2、 of mobile Earth stations for global non-geostationary mobile-satellite systems in the bands 1-3 GHz that should be used by administrations as a common technical basis for:establishing type approval requirements for MES terminals; facilitating the licensing of MES terminal operations; facilitating t
3、he development of mutual recognition arrangements of type approval of MES terminals; and facilitating the development of mutual recognition arrangements to facilitate the circulation and use of MES terminals. The ITU Radiocommunication Assembly, considering a) that various technically and operationa
4、lly different global non-geostationary (non-GSO) satellite systems in the mobile-satellite service (MSS) are planned to commence operation in the near future; b) that these non-GSO MSS systems are expected to provide personal communications on a global basis to either hand-held or transportable mobi
5、le earth stations (MES) terminals; c) that MES terminals are expected to operate with these global non-GSO MSS systems in various countries and hence, the circulation of MES terminals is an important aspect of these systems; d) that the circulation of terminals among administrations is usually subje
6、ct to a number of regulations including satisfactory type approval to an agreed technical standard; e) that there is a need for identifying the essential technical requirements for the type approval of MES terminals of global non-GSO MSS systems; f) that there is a need to protect safety services; g
7、) that the essential technical requirements should achieve an acceptable balance between equipment design and production cost and the need for effective use of the radio-frequency spectrum and should be impartial with respect to all global non-GSO MSS technologies, subject to the protection of other
8、 radio systems; h) that the specification of values for essential technical requirements for TDMA non-GSO MSS systems would not prevent the specification of the same or higher values for CDMA non-GSO MSS systems, *This Recommendation should be brought to the attention of the International Civil Avia
9、tion Organization (ICAO) and the International Maritime Organization (IMO), particularly with respect to the operational techniques referred to in recommends 3. 2 Rec. ITU-R M.1343-1 considering also a) that the World Telecommunication Policy Forum (WTPF-96) which addressed Global Mobile Personal Co
10、mmunications by Satellite (GMPCS) policy and regulatory issues, adopted Opinion No. 3, calling upon the three ITU Sectors, each within its competence, to initiate new studies or pursue current ones, and to reach conclusions as soon as practicable to facilitate the introduction of GMPCS on a global a
11、nd regional basis; b) that the World Telecommunication Policy Forum (WTPF-96) which addressed Global Mobile Personal Communications by Satellite (GMPCS) policy and regulatory issues, also adopted Opinion No. 4, establishment of a Memorandum of Understanding (MoU) to facilitate the circulation of GMP
12、CS user terminals (GMPCS-MoU) which, inter alia, requested the Secretary-General of the ITU to take the necessary steps to prepare a GMPCS-MoU related to the circulation of GMPCS user terminals to facilitate the full implementation of GMPCS; c) that the development of relevant ITU Recommendations co
13、uld facilitate the preparation and adoption of the GMPCS-MoU; d) that the identification by the ITU-R of essential technical requirements for MES terminals operating with global non-GSO MSS systems would provide a common technical basis for facilitating type approval of MES terminals by various nati
14、onal authorities and the development of mutual recognition arrangements for type approvals of MES terminals and mutual recognition arrangements for circulation of MES terminals among administrations; e) that the identification by the ITU-R of essential technical requirements for MES terminals operat
15、ing with global non-GSO MSS systems in the 1 to 3 GHz range would ensure that interference will not be caused to other radio services by non-GSO MSS MES terminals; f) that other relevant technical characteristics are prescribed by the Radio Regulations that pertain to the effective use of the radio-
16、frequency spectrum by mobile earth stations; g) that, for a particular GMPCS system, some MES equipment parameters such as e.i.r.p. and necessary bandwidth which are not contained in this Recommendation, are contained in the information provided as part of the Appendix 4 of the Radio Regulations, co
17、nsidering further a) that it would be necessary for non-GSO MSS systems to have the capability to determine the location of the MES terminals operating with non-GSO MSS systems in order to fulfil the relevant requirements of Resolution 25 (Rev.WRC-03) and WTPF-96 Opinion No. 2; b) that essential tec
18、hnical requirements should be measurable and verifiable, recommends 1 that the essential technical requirements of MES terminals for global non-GSO MSS systems in the bands 1-3 GHz in Annexes 1 and 2 should be used by administrations as a common technical basis for: a) establishing type approval req
19、uirements for MES terminals; b) facilitating the licensing of MES terminal operations; c) facilitating the development of mutual recognition arrangements of type approval of MES terminals; d) facilitating the development of mutual recognition arrangements to facilitate the circulation and use of MES
20、 terminals; Rec. ITU-R M.1343-1 3 2 that the non-GSO MSS systems should be capable of determining the location of its operating MES terminals; 3 that the further studies mentioned in Note 4 to Table 7 be initiated to finalize the e.i.r.p. values for the bands between 1 580.42 MHz and 1 605 MHz and f
21、or the band 1 605-1 610 MHz, and include study of the operational techniques that may enable the values to be met. NOTE 1 The operational techniques referred to in this Recommendation should be brought to the attention of civil aviation authorities. NOTE 2 Administrations which, for national spectru
22、m management purposes, require additional information on equipment parameters which are not contained in this Recommendation, can obtain this information from the relevant RR Appendix 4 parameters. Annex 1 Essential technical requirements of MES for global non-GSO MSS systems in the bands 1-3 GHz us
23、ing TDMA This Annex contains essential technical requirements for MES terminals of global non-GSO MSS systems using TDMA and operating in the bands 1-3 GHz. The tables on the following pages of this Annex summarize the maximum unwanted emission requirements for such terminals. In addition to these u
24、nwanted emission requirements there is an additional requirement for automatic shut-off features of MES terminals which is: Automatic shut-off features: The MES terminals should include a means of identifying whether there is a malfunctioning processor or other fault in its operation and be capable
25、of automatically shutting down transmissions in the case of an identified malfunction no later than one second after a malfunction has been identified. Throughout this Recommendation, various terms which are defined in the Radio Regulations are used. In addition to these terms there is an additional
26、 essential term which is defined as follows: Nominated bandwidth (Bn): The Bnof the MES radio-frequency transmission is wide enough to encompass all spectral elements of the transmission which have a level greater than the specified levels of unwanted emissions. The Bnis defined relative to the MES
27、actual carrier frequency fc. Bnis the width of the frequency interval (fc a, fc+ b), where a and b, which is specified by the terminal manufacturer, may vary with fc. The frequency interval (fc a, fc+ b) does not encompass more than either: when a = b, 4 nominal carrier frequencies for narrow-band s
28、ystems; when a b, 1 nominal carrier frequency for narrow-band systems; or 1 nominal carrier frequency for wideband systems. The frequency interval (fc a, fc+ b) is within the assigned band of the MES terminals. 4 Rec. ITU-R M.1343-1 TABLE 1 Maximum unwanted emissions outside the band 1 610 to 1 626.
29、5 MHz and the band 1 626.5 to 1 628.5 MHz for an MES using TDMA access techniques Frequency Carrier-on (MHz) e.i.r.p. (dBW) (Note 1) Measurement bandwidth 0.1-30 66 10 kHz 30-1 000 66 100 kHz 1 000-1 559 60 1 MHz 1 559-1 573.42 70 1 MHz (Note 2) 1 573.42-1 580.42 70 (Note 3) 1 MHz (Note 2) 1 580.42-
30、1 590 70 1 MHz (Note 2) 1 590-1 605 70 1 MHz (Note 2) 1 605-1 610 (Note 4) 1 MHz (Note 2) 1 610-1 626.5 Not applicable (Note 5) Not applicable 1 626.5-1 628.5 Not applicable Not applicable 1 628. 5-1 631.5 60 30 kHz 1 631.5-1 636.5 60 100 kHz 1 636.5-1 646.5 60 300 kHz 1 646.5 -1 666.5 60 1 MHz 1 66
31、6.5-2 200 60 3 MHz 2 200-12 750 60 3 MHz NOTE 1 Average responding instruments should be used to measure the e.i.r.p. values. Except when Note 3 applies: a) the measurement time should be such that the difference of the measured e.i.r.p. levels, averaged over subsequent measurement samples, is less
32、than 1 dB at any particular measurement frequency, or b) a measurement time of 100 ms may be used if the measured e.i.r.p. values comply with the applicable limits. For non-continuous signals the measurement should be performed over the active part of the burst. NOTE 2 Measurement bandwidths less th
33、an 1 MHz (e.g. 30 kHz, 100 kHz or 300 kHz) are allowable provided the power in the narrower bandwidth is integrated over 1 MHz. NOTE 3 Averaged over 20 ms. NOTE 4 70 dBW/MHz at 1 605 MHz, linearly interpolated in dB/MHz, to 10 dBW/MHz at 1 610 MHz. Appropriate protection of the Global Navigation Sat
34、ellite System (GNSS) needs to be considered, recognizing the current operation and phased transition of the GLONASS system into the new frequency plan. The Russian Federation states that the level of 70 dBW/MHz shall be used to provide protection of GLONASS receiver operations and that a level of 37
35、 dBW/MHz at 1 610 MHz, linearly interpolated to 70 dBW/MHz at 1 607.5 MHz, is sufficient to protect GLONASS wideband operations in the final GLONASS frequency plan. NOTE 5 MESs shall operate in the frequency band 1 610-1 626.5 MHz in accordance with RR No. 5.364. Subject to modification of the GLONA
36、SS frequency plan and operating GLONASS receivers, MSS operators, through national administrations, should apply the procedures of RR Nos. 9.11A and 9.17A, or Resolution 46 (Rev.WRC-97) where applicable to reach agreement, on a bilateral basis, to acceptable conditions for the joint operation of the
37、 GLONASS and MSS systems, including testing to ensure electromagnetic compatibility between the GLONASS receivers and MESs. Rec. ITU-R M.1343-1 5 TABLE 2 Maximum unwanted emissions within the allocated band 1 610 to 1 626.5 MHz and the band 1 626.5 to 1 628.5 MHz of an MES operating such that the no
38、minated bandwidth is entirely or partially contained in the frequency band 1 618.25 to 1 626.5 MHz (Notes 1 and 2) The maximum e.i.r.p. of the unwanted emissions inside the band 1 610 to 1 626.5 MHz and the band 1 626.5 to 1 628.5 MHz from MESs operating within the band 1 610 to 1 626.5 MHz should n
39、ot exceed the limits in Table 2. Carrier-on Frequency offset (kHz) (Note 3) e.i.r.p. (dBW) (Note 4) Measurement bandwidth (kHz) (Note 5) 0 to 160 35 30 160 to 225 35 to 38.5 30 225 to 650 38.5 to 45 30 650 to 1 365 45 30 1 365 to 1 800 53 to 56 30 1 800 to 16 500 56 30 NOTE 1 Average responding inst
40、ruments should be used to measure the e.i.r.p. values. The measurement time should be such that the difference of the measured e.i.r.p. levels, averaged over subsequent measurement samples, is less than 1 dB at any particular measurement frequency. Alternatively, a measurement time of 100 ms may be
41、used if the measured e.i.r.p. values comply with the applicable limits. For non-continuous signals, the measurement should be performed over the active part of the burst. NOTE 2 The MES should include means of inhibiting transmissions when necessary to protect the radioastronomy service in the 1 610
42、.6-1 613.8 MHz band from emissions produced by the MES. NOTE 3 Frequency offset is determined from: a) the nearest edge of the nominated bandwidth of the nominal carrier closest to the MSS system operating in another assigned band within the band 1 610 to 1 626.5 MHz. The frequency offset is measure
43、d in the direction of the adjacent MSS system. b) the upper edge of the nominated bandwidth of the carrier under test for emissions within the band 1 626.5 to 1 628.5 MHz. NOTE 4 Linearly interpolated in dBW versus frequency offset. NOTE 5 The measurement bandwidth used may be 3 kHz if the unwanted
44、e.i.r.p. limits are reduced correspondingly. TABLE 3 Maximum e.i.r.p. of the unwanted emissions of an MES in the carrier-off state Frequency (MHz) e.i.r.p. (dBW) Measurement bandwidth 0.1-30 87 10 kHz 30-1 000 87 100 kHz 1 000-12 750 77 100 kHz NOTE 1 Peak hold measurement techniques should be used.
45、 These values must be at or below the values for the carrier-on state. 6 Rec. ITU-R M.1343-1 TABLE 4 Maximum unwanted emissions outside the 1 980-2 025 MHz allocations from an MES (Note 1) Frequency Carrier-on (MHz) e.i.r.p. (dBW) (Note 2) Measurement bandwidth 0.1-30 66 10 kHz 30-1 000 66 100 kHz 1
46、 000-1 559 60 3 MHz 1 559-1 626.5 70 (Note 3) 1 MHz 1 626.5-1 950 60 3 MHz 1 950-1 960 60 1 MHz 1 960 -1 970 60 300 kHz 1 970-1 975 60 100 kHz 1 975-1 978 60 30 kHz 1 978-1 980 The levels in Table 5, as appropriate, for the frequency offset 0-2 MHz, should apply from 1 978-1 980 MHz. 1 980 to y (Not
47、e 4) Not applicable Not applicable y to y+2 The levels in Table 5, as appropriate, for the frequency offset 0-2 MHz should apply from y to y+2 MHz. y+2 to y+5 60 30 kHz y+5 to y+10 60 100 kHz y+10 to y+20 60 300 kHz y+20 to y+30 60 1 MHz y+30 to 12 750 60 3 MHz NOTE 1 The MSS (Earth-to-space) is all
48、ocated frequencies on a co-primary basis in the band 1 980-2 010 MHz in all Regions and in the band 2 010-2 025 MHz in Region 2 subject to the dates of entry into force mentioned in RR No. 5.389A. NOTE 2 Average responding instruments should be used to measure the e.i.r.p. values. Except when Note 3
49、 applies: a) the measurement time should be such that the difference of the measured e.i.r.p. levels, averaged over subsequent measurement samples, is less than 1 dB at any particular measurement frequency, or b) a measurement time of 100 ms may be used if the measured e.i.r.p. values comply with the applicable limits. For non-continuous signals the measurement should be performed over the active part of the burst. NOTE 3 Averaged over 20 ms. NOTE 4 The value of y (MHz) corresponds to the upper band e
