1、 Recommendation ITU-R M.1901-1(12/2013)Guidance on ITU-R Recommendations related to systems and networks in the radionavigation-satellite service operating 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 MHzM SeriesMobile, radiodetermination,
2、 amateurand related satellite servicesii Rec. ITU-R M.1901-1 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 w
3、ithout 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 Intellectu
4、al Property 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/g
5、o/patents/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 Recor
6、ding for 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-satel
7、lite service 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 Recommen
8、dation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2014 ITU 2014 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R M.1901-1 1 RECOMMENDATION ITU-R M
9、.1901-1 Guidance on ITU-R Recommendations related to systems and networks in the radionavigation-satellite service operating 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 (Questions ITU-R 217-2/4 and ITU-R 288/4) (2012-2013) Scope This
10、Recommendation is intended to provide guidance on ITU-R Recommendations related to the technical characteristics and protection criteria of radionavigation-satellite service (RNSS) receiving earth stations and characteristics of RNSS transmitting space stations planned or operating in the frequency
11、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. In addition, this Recommendation gives a brief overview of those Recommendations. The ITU Radiocommunication Assembly, considering a) that systems and networks in the radionavigation-satellite service (RNSS
12、) provide worldwide accurate information for many positioning, navigation and timing applications, including safety aspects for some frequency bands and under certain circumstances and applications; b) that there are several operating and planned systems and networks in the RNSS; c) that any properl
13、y equipped earth station may receive navigation information from systems and networks in the RNSS on a worldwide basis, recognizing a) that Recommendations ITU-R M.1905, ITU-R M.1902, ITU-R M.1903 and ITU-R M.1904 provide technical and operational characteristics of, and protection criteria for, sys
14、tem and network receivers (space-to-Earth and space-to-space) in the RNSS in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz; b) that Recommendation ITU-R M.1906 provides technical and operational characteristics and protection criteria of receiving space stations and characteristics
15、of transmitting earth stations in the RNSS (Earth-to-space) operating in the band 5 000-5 010 MHz; c) that Recommendation ITU-R M.2031 provides technical and operational characteristics and protection criteria of receiving earth stations and characteristics of transmitting space stations in the RNSS
16、 (space-to-Earth) operating in the band 5 010-5 030 MHz; d) that Recommendation ITU-R M.1787 provides technical descriptions of systems and networks in the RNSS (space-to-Earth and space-to-space) and technical characteristics of transmitting space stations operating in the bands 1 164-1 215 MHz, 1
17、215-1 300 MHz and 1 559-1 610 MHz; e) that Recommendation ITU-R M.1318 provides a model for evaluating interference from environmental sources into RNSS receivers operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz and 5 010-5 030 MHz; 2 Rec. ITU-R M.1901-1 f) that Recommendatio
18、n ITU-R M.2030 provides an evaluation method for pulsed interference from relevant radio sources other than in the RNSS to the RNSS systems and networks operating in the 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz bands; g) that Recommendation ITU-R M.1831 provides a methodology for RNSS in
19、tersystem interference estimation to be used in coordination among systems and networks in the RNSS, recommends 1 that Annex 1 should be used as guidance on ITU-R Recommendations associated with systems and networks in the RNSS operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz
20、, 5 000-5 010 MHz and 5 010-5 030 MHz. Annex 1 1 List of Recommendations relating to RNSS ITU-R Recommendations providing technical characteristics and protection criteria of systems and networks in the RNSS are listed in Table 1. Where a particular RNSS system is considered, some Recommendations pr
21、ovide details of that system in a separate annex while others have a common annex. TABLE 1 ITU-R Recommendations on RNSS system characteristics and protection criteria in the 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 Band(s) (MHz) Types of stations
22、Rec. ITU-R Title 1 164-1 215 User receiver M.1905 Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 164-1 215 MHz 1 215-1 300 User receiver M.1902 Characteristics and protection criteria for receivin
23、g earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 215-1 300 MHz 1 559-1 610 User receiver M.1903 Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) and receivers in the aerona
24、utical radionavigation service operating in the band 1 559-1 610 MHz 5 010-5 030 User receiver; Earth station receiver M.2031 Characteristics and protection criteria of receiving earth stations and characteristics of transmitting space stations of the radionavigation-satellite service (space-to-Eart
25、h) operating in the band 5 010-5 030 MHz 5 000-5 010 Satellite receiver M.1906 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 Rec. I
26、TU-R M.1901-1 3 TABLE 1 (end) Band(s) (MHz) Types of stations Rec. ITU-R Title 1 164-1 215 1 215-1 300 1 559-1 610 Space-borne user receiver M.1904 Characteristics, performance requirements and protection criteria for receiving stations of the radionavigation-satellite service (space-to-space) opera
27、ting in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz 1 164-1 215 1 215-1 300 1 559-1 610 Satellite transmitter M.1787 Description of systems and networks in the radionavigation-satellite service (space-to-Earth and space-to-space) and technical characteristics of transmit
28、ting space stations operating in the bands 1 164-1 215 MHz,1 215-1 300 MHz and 1 559-1 610 MHzTable 2 lists the ITU-R Recommendations which provide models for: 1) evaluation of continuous and pulsed interference to RNSS receivers from non-RNSS radio sources; and 2) evaluation of intersystem RNSS int
29、erference for the purpose of coordination among systems and networks in the RNSS. TABLE 2 ITU-R Recommendations on RNSS methods for evaluating interference to RNSS systems in the bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz and 5 010-5 030 MHz Bands (MHz) Types of stations Rec. ITU-R Titl
30、e 1 164-1 215 1 215-1 300 1 559-1 610 5 010-5 030 All M.1318 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 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 61
31、0 MHz and 5 010-5 030 MHz bands 1 164-1 215 1 215-1 300 1 559-1 610 5 010-5 030 All M.2030 Evaluation method for pulsed interference from relevant radio sources other than in the radionavigation-satellite service to the radionavigation-satellite service systems and networks operating in the 1 164-1
32、215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz frequency bands 1 164-1 215 1 215-1 300 1 559-1 610 5 010-5 030 All M.1831 A coordination methodology for RNSS inter-system interference estimation 2 Parameters relevant to the assessment of interference to RNSS systems RNSS system parameters relevant to
33、the assessment of interference from radio sources other than in the RNSS are listed in Table 3. Certain RNSS signal parameters are not shown but are contained in Recommendation ITU-R M.1787. 4 Rec. ITU-R M.1901-1 TABLE 3 RNSS parameter descriptions relevant to Recommendations ITU-R M.1905, ITU-R M.1
34、902, ITU-R M.1903, ITU-R M.1904 and ITU-R M.2031 (see Notes 2, 3) Parameter RNSS parameter description Signal frequency range (MHz) Frequency range of the RNSS signal of interest. For CDMA systems: carrier frequency half the signal bandwidth (unless otherwise noted); for FDMA systems: base frequency
35、 + (channel number * channel spacing) half the signal bandwidth. Channel number range should also be given. Maximum receiver antenna gain in upper hemisphere (dBi) Maximum receiver antenna gain in upper hemisphere with the specified polarization. Maximum receiver antenna gain in lower hemisphere (dB
36、i) Maximum receiver antenna gain in lower hemisphere with the specified polarization. RF filter 3 dB bandwidth (MHz) Bandwidth between the 3 dB down points of the receivers front-end RF bandpass filter. Pre-correlation filter 3 dB bandwidth (MHz) Bandwidth between the 3 dB down points of the receive
37、rs IF bandpass filter (just prior to the correlator). Receiver system noise temperature (K) Combination of receiver equivalent input noise temperature and antenna equivalent noise temperature. Tracking mode threshold power level of aggregate narrow-band interference at the passive antenna output (dB
38、W) The minimum narrow-band interference power level (referenced to the passive antenna output and within the RF filter bandwidth) at which the receiver loses track of a desired signal at the specified minimum received power level with a specific probability (i.e. cannot remain in track mode with the
39、 corresponding probability). This assumes the receiver had already acquired the desired signal and was tracking until the point at which the interference exceeds this threshold and the receiver fails to track properly (e.g. navigation data can no longer be properly demodulated). (See Note 1) Acquisi
40、tion mode threshold power level of aggregate narrow-band interference at the passive antenna output (dBW) The minimum narrow-band interference power level (referenced to the passive antenna output and within the RF filter bandwidth) at which the receiver cannot acquire a desired signal at the specif
41、ied minimum received power level with a specified probability and within a specified time period (i.e. cannot acquire an available signal with the corresponding probability). Note that this interference level is lower than that for the previous (tracking mode) parameter. (See Note 1) Tracking mode t
42、hreshold power density level of aggregate wideband interference at the passive antenna output (dB(W/MHz) The minimum wideband interference power density level (referenced to the passive antenna output and within the RF filter bandwidth) at which the receiver loses track of a desired signal at the sp
43、ecified minimum received power level with a specified probability (i.e. cannot remain in tracking mode with the corresponding probability). This assumes the receiver has already acquired the desired signal and was tracking until the point at which the interference exceeds this threshold and the rece
44、iver fails to track properly (e.g. navigation data can no longer be properly demodulated). For purposes of determining this value, assume the aggregate interference is white Gaussian noise over the entire pre-correlation filter 3 dB bandwidth. (See Note 1) Rec. ITU-R M.1901-1 5 TABLE 3 (end) Paramet
45、er RNSS parameter description Acquisition mode threshold power density level of aggregate wideband interference at the passive antenna output (dB(W/MHz) The minimum wideband interference power density level (referenced to the passive antenna output and within the RF filter bandwidth) at which the re
46、ceiver cannot acquire a desired signal at the specified minimum received power level with a specified probability and within a specified time period (i.e. cannot acquire an available signal with the corresponding probability). Note that this interference level is lower than that for the previous (tr
47、acking mode) parameter. For purposes of determining this value, assume the aggregate interference is white Gaussian noise over the entire pre-correlation filter 3 dB bandwidth. (See Note 1) Receiver input compression level (dBW) The minimum level at the output of the passive antenna at which the rec
48、eiver linear gain is compressed. Receiver survival level (dBW) The maximum power level at the output of the passive antenna at which the receiver must survive without component failure. Overload recovery time (s) The maximum time duration for the receiver to return to a steady-state transfer functio
49、n performance after a signal exceeding the receiver input compression level drops below that level. NOTE 1 Unless otherwise specified, based on modulation parameters of the RNSS signal of interest, narrow-band continuous interference is considered to have a bandwidth less than 700 Hz, and wideband continuous interference is considered to have a bandwidth greater than 1 MHz. NOTE 2 ITU-R recognizes that it would be useful to know the threshold value(s) of pulse-like interference at the input of a receiver (in tracking mode and acquisition mode). Unfortunately, the nature of thes
