1、 Recommendation ITU-R M.1906-1 (09/2015) Characteristics and protection criteria of receiving space stations and characteristics of transmitting earth stations in the radionavigation-satellite service (Earth-to-space) operating in the band 5 000-5 010 MHz M Series Mobile, radiodetermination, amateur
2、 and related satellite services ii Rec. ITU-R M.1906-1 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without
3、 limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Pro
4、perty Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/pate
5、nts/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording f
6、or production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite s
7、ervice SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation
8、 was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2015 ITU 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R M.1906-1 1 RECOMMENDATION ITU-R M.1906-
9、1 Characteristics and protection criteria of receiving space stations and characteristics of transmitting earth stations in the radionavigation-satellite service (Earth-to-space) operating in the band 5 000-5 010 MHz (Questions ITU-R 217-2/4 and ITU-R 288/4) (2012-2015) Scope Characteristics and pro
10、tection criteria for radionavigation-satellite service (RNSS) receiving space stations, and characteristics of RNSS transmitting earth stations, planned or operating in the band 5 000-5 010 MHz are presented in this Recommendation. This information is intended for performing analyses of radiofrequen
11、cy interference impact on systems and networks in the RNSS (Earth-to-space) operating in this band from radio sources other than in the RNSS. Keywords RNSS, protection criteria, radiofrequency interference impact Abbreviations/Glossary QPSK Quadrature phase-shift keying SoL Safety-of-Life UQPSK Unba
12、lanced quadrature phase-shift keying Related ITU Recommendations, Reports Recommendation ITU-R M.1318-1 Evaluation model for continuous interference from radio sources other than in the radionavigation-satellite service to the radionavigation-satellite service systems and networks operating in the 1
13、 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz and 5 010-5 030 MHz bands Recommendation ITU-R M.1787-2 Description of systems and networks in the radionavigation-satellite service (space-to-Earth and space-to-space) and technical characteristics of transmitting space stations operating in the band
14、s 1 164-1 215 MHz,1 215-1 300 MHz and 1 559-1 610 MHz Recommendation ITU-R M.1831-1 A coordination methodology for RNSS inter-system interference estimation Recommendation ITU-R M.1901-1 Guidance on ITU-R Recommendations related to systems and networks in the radionavigation-satellite service operat
15、ing in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz, 5 000-5 010 MHz and 5 010-5 030 MHz Recommendation ITU-R M.1902-0 Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 215-1
16、 300 MHz 2 Rec. ITU-R M.1906-1 Recommendation ITU-R M.1903-0 Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) and receivers in the aeronautical radionavigation service operating in the band 1 559-1 610 MHz Recommendation I
17、TU-R M.1904-0 Characteristics, performance requirements and protection criteria for receiving stations of the radionavigation-satellite service (space-to-space) operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz Recommendation ITU-R M.1905-0 Characteristics and pro
18、tection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 164-1 215 MHz Recommendation ITU-R M.2030-0 Evaluation method for pulsed interference from relevant radio sources other than in the radionavigation-satellite service to the
19、 radionavigation-satellite service systems and networks operating in the 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz frequency bands Recommendation ITU-R M.2031-1 Characteristics and protection criteria of receiving earth stations and characteristics of transmitting space stations of the ra
20、dionavigation-satellite service (space-to-Earth) operating in the band 5 010-5 030 MHz The ITU Radiocommunication Assembly, considering a) that systems and networks in the radionavigation-satellite service (RNSS) provide worldwide accurate information for many positioning, navigation and timing appl
21、ications, including safety aspects for in some frequency bands and under certain circumstances and applications; b) that there are various operating and planned systems and networks in the RNSS; c) that studies are being conducted on the interference into RNSS systems and networks from other radio s
22、ervices, recognizing a) that the band 5 000-5 010 MHz is globally allocated on a primary basis to RNSS (Earth-to-space); b) that the band 5 000-5 010 MHz is also globally allocated on a primary basis to the aeronautical radionavigation service (ARNS); c) that the band 5 000-5 010 MHz is also globall
23、y allocated on a primary basis to the aeronautical mobile-satellite (route) service (AMS(R)S) under No. 5.367 of the Radio Regulations (RR) subject to No. 9.21 of RR; d) that Recommendation ITU-R M.1901 provides guidance on ITU-R Recommendations related to systems and networks in the RNSS, recommend
24、s 1 that the characteristics and protection criteria of receiving space stations and the characteristics of transmitting earth stations given in Annexes 1, 2 and 3 should be used in performing analyses of radio-frequency interference impact on systems and networks in the RNSS (Earth-to-space) operat
25、ing in the band 5 000-5 010 MHz from radio sources other than in the RNSS; Rec. ITU-R M.1906-1 3 2 that the allowance for interference to systems and networks in the RNSS (Earth-to-space) operating in the band 5 000-5 010 MHz from all radio sources of primary services in the band other than in the R
26、NSS, should not exceed 6% of the RNSS receiver system noise. Annex 1 Technical characteristics and protection criteria of receiving space stations and characteristics of transmitting earth stations of the Galileo system operating in the band 5 000-5 010 MHz 1 Introduction This band is used by the Ga
27、lileo system for the operation of feeder-link stations transmitting navigation mission information to the satellites. Through feeder links all system and navigation mission relevant information is transferred to the Galileo satellites comprising ephemerides, clock correction information, service int
28、egrity messages and all other data elements of the navigation message that require continuous updates. The feeder link is not intended for user access. Up to 20 uplink earth stations, using the RNSS (Earth-to-space) allocation in the 5 000-5 010 MHz frequency band are operated from geographical loca
29、tions worldwide to enable access to each satellite in the constellation at any time. The system includes in its architecture: a space segment comprising 27 active satellites evenly distributed on three circular Earth orbits at 23 222 km altitude, each orbital plane inclined to the equator by 54 a gr
30、ound control segment providing system and satellite monitoring and control, operating on 2 GHz frequencies for satellite control (telecommand and telemetry); a ground mission segment that uploads data for subsequent broadcast to users of integrity messages via Galileo satellites. The data elements f
31、or the orbit ephemerides and service integrity information are calculated from measurements determined and processed by a worldwide network of Galileo monitoring stations. One of the most critical elements is the dissemination of integrity information to user receivers in the Galileo Safety-of-Life
32、(SoL) service. This information is provided by the 5 GHz feeder uplink signal and is specified to reach user receivers within six seconds after detection of pre-defined limits of service degradation. The SoL positioning and timing information is provided through the E5-signals. 2 Galileo feeder upli
33、nk characteristics The parameters for typical Galileo feeder uplink earth stations are listed in Table 1-1. Transmit filtering will be implemented for all Galileo transmit signals. 4 Rec. ITU-R M.1906-1 TABLE 1-1 Characteristics of Galileo transmitting earth stations operating in the band 5 000-5 01
34、0 MHz Parameter Value Centre frequency (MHz) 5 005 Antenna diameter (m) 3.0 Polarization RHCP Antenna pattern Rec. ITU-R S.465-5 Theoretical antenna gain (dBi) 41.8 e.i.r.p. (dBW) 50.3 Modulation/coding QPSK/spread spectrum RF bandwidth (MHz) 10 RHCP: Right-hand circular polarization. 3 Satellite re
35、ceiver characteristics Typical characteristics for satellite receivers are listed in Table 1-2. TABLE 1-2 Characteristics of Galileo receiving space stations operating in the band 5 000-5 010 MHz Parameter Value Centre frequency (MHz) 5 005 RF bandwidth (MHz) 10 Polarization RHCP Antenna pattern/typ
36、e Circular horn antenna Antenna pointing Nadir Maximum receive antenna gain (dBi) 12.8 Antenna half-beam width () (at 5 elevation angle) 12.4 Minimum elevation () 5 Satellite altitude (km) 23 222 Rx noise PSD (dBW/Hz) 201 Tolerable effective I0 (based on DT/T of 6%) (dBW/Hz) 213.2 Rec. ITU-R M.1906-
37、1 5 Annex 2 Technical characteristics and protection criteria of receiving space stations and characteristics of transmitting earth stations for the Global Positioning System operating Earth-to-space in the band 5 000-5 010 MHz 1 Introduction The Global Positioning System (GPS) uplink and downlink f
38、eeder links will provide communications for system and satellite monitoring, commanding and control; updates of orbit ephemerides and clock synchronization. A feeder uplink in the 5 000-5 010 MHz band is being considered for future GPS modernizations as a backup for the current 2.2 GHz GPS feeder up
39、link. Communications for feeder links may use filtered quadrature phase-shift keying (QPSK) or other bandwidth-efficient modulation. 2 GPS feeder uplink characteristics GPS plans estimate the operational bandwidth of the uplink to be 1.1 MHz, with a data rate of 1.1 megabits per second or less. The
40、earth stations uplink transmit antenna is assumed to be a centre-fed circular parabolic dish, which is also assumed to be used as the downlink receive antenna for a 5 010-5 030 MHz feeder-link downlink. However, due to the fact that the 5 000-5 010 MHz Earth-to-space and 5 010-5 030 MHz space-to-Ear
41、th bands are adjacent, simultaneously using both uplink and downlink feeder links with a single GPS space station would require further research. The most likely solution is the implementation of satellite filters with very sharp cut-offs. However, at this point, studies have not concluded on whethe
42、r satellites should simultaneously implement 5 GHz feeder uplinks and downlinks. Further study is currently being done as designs for this and other 5 GHz RNSS systems mature. Tables 2-1 and 2-2 provide characteristics for the GPS transmitting ground stations and characteristics and protection crite
43、ria for receiving feeder-link space stations, respectively, for operation in the band 5 000-5 010 MHz. Transmit filtering will be implemented for all GPS transmit signals. Spurious emissions are intended to be 60 dB from the peak. While these parameters are derived from and consistent with current G
44、PS specifications, these values are still subject to change. TABLE 2-1 GPS feeder uplink transmissions in the band 5 000-5 010 MHz Parameter Parameter value Signal frequency range (MHz) (Note 1) 5 000.605 0.6 Data rate (symbol/s) 2 200 000 symbol/s Signal modulation method Filtered QPSK Polarization
45、 RHCP Ellipticity (dB) 1.5 maximum Transmit e.i.r.p. (dBW) 66.6 NOTE 1 Carrier frequency of the RNSS signal of interest half the signal bandwidth. 6 Rec. ITU-R M.1906-1 TABLE 2-2 Characteristics and protection criteria of GPS receiving space stations operating in the band 5 000-5 010 MHz Parameter P
46、arameter value Antenna diameter (m) 0.150 Polarization RHCP Antenna pattern Centre-fed circular parabolic dish Theoretical antenna gain (dBi) 17.91 Antenna efficiency loss (dB) 4.00 Maximum polarization mismatch loss (dB) 0.31 Maximum receive antenna gain (dBi) 13.60 Satellite receiver system noise
47、temperature (K) 590 Minimum elevation (degree) 5.0 Satellite altitude (km) 20 200 Annex 3 Technical characteristics and protection criteria of receiving space stations and the characteristics of transmitting earth stations of the Quasi-Zenith Satellite System (QZSS) operating in the band 5 000-5 010
48、 MHz 1 Introduction The Quasi-Zenith Satellite System (QZSS) uplink and downlink feeder links provide communications for system and satellite monitoring, command, control and navigation message upload. The QZSS control stations are located in the Asia-Pacific Region. 2 QZSS characteristics QZSS sate
49、llites include RNSS payloads operating in both the 5 000-5 010 MHz band (satellite receivers) and the 5 010-5 030 MHz band (satellite transmitters). Due to the fact that these bands are adjacent, a self-interference mitigation technique is implemented in the QZSS satellites payload in order to avoid self-interference. The QZSS feeder uplink in the 5 000-5 010 MHz band includes command, navigation message upload and ranging functions. Multiple navigation upload links on a single RF carrier frequency will be implemented for each QZSS satellite, except for the first QZSS
