ITU-R REPORT M 2172-2009 Radiolocation service sharing feasibility in the 154-156 MHz bands《波段在154-156MHz的无线电定位业务的共享可行性》.pdf
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1、 Report ITU-R M.2172(12/2009)Radiolocation service sharing feasibility in the 154-156 MHz bandsM SeriesMobile, radiodetermination, amateurand related satellite servicesii Rep. ITU-R M.2172 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economic
2、al use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed by Wor
3、ld and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual 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 f
4、or the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/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
5、 of ITU-R Reports (Also available online at http:/www.itu.int/publ/R-REP/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, a
6、mateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management Note: This ITU-R R
7、eport was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2010 ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rep. ITU-R M.2172 1 REPORT
8、 ITU-R M.2172 Radiolocation service sharing feasibility in the 154-156 MHz bands (2009) Executive summary The report summarizes the sharing studies conducted in accordance with Resolution 611 (WRC-07) on WRC-12 Agenda item 1.14 which is to consider a primary allocation to the radiolocation service i
9、n the portion of the band 30-300 MHz for the implementation of new applications in the radiolocation service. The sharing studies presented in this Report were conducted in frequency band 154-156 MHz in order to assess sharing feasibility with fixed and mobile services. The results of sharing studie
10、s are summarized in the conclusion section of the Report. 1 Introduction Studies on protection criteria and technical characteristics of the radiolocation systems operating in VHF frequency range resulted in preparation of Recommendation ITU-R M.1802 Characteristics and protection criteria for radar
11、s operating in the radiolocation service in the frequency band 30-300 MHz. This Recommendation contains the typical characteristics of radars operating in the VHF band. Development of new applications in the radiolocation service closely related to significant growth of the number of space objects i
12、ncluding artificial debris. These applications are planned for used of aerospace surveillance and tracking the launch and manoeuvring of spacecrafts. They are based on design of effective and economical radars that can be implemented in the VHF range. WRC-12 Agenda item 1.14 was adopted at WRC-07 in
13、 order to address existing lack of spectrum available for radiolocation service in VHF band required for large-scale air and space surveillance operations. VHF radio waves propagate well through the ionosphere, thus enabling various space object detection applications including remote space sensing
14、and asteroid detection, as well as for defining the position of natural and artificial earth satellites, from terrestrial-based radiolocation systems. ITU-R studies based on the current requirements were limited to radiolocation systems for space-object detection from terrestrial locations in a port
15、ion of the band 30-300 MHz up to 2 MHz bandwidth systems, however allocation with a wider frequency range may provide flexibility and facilitate sharing with existing services. This report presents sharing studies between the radiolocation services systems and systems from other services in the band
16、 154-156 MHz. 2 Rep. ITU-R M.2172 2 Current use of the band 154-156 MHz and interference susceptibility of systems operating in the considered band The band 154-156 MHz is currently allocated worldwide to the fixed and mobile services on a primary basis. 2.1 Fixed, mobile, maritime mobile and aerona
17、utical mobile services susceptibility used in the study Recommendation ITU-R M.1808 provides technical and operational characteristics of conventional and trunked land mobile systems. Section 2.1 of Annex 1 of Recommendation ITU-R M.1808 states that “there are many methodologies used to ensure coexi
18、stence between conventional and trunked land mobile systems (e.g. field-strength contours, carrier-to-interference). For simplicity, an I/N of 6 dB could be used to determine the impact of interference. For applications with greater protection requirements, such as public protection and disaster rel
19、ief (PPDR), an I/N of 10 dB may be used to determine the impact of interference”. Reference1shows that in the 108-389 MHz frequency band, a permitted interference field strength is 12 dB(V/m) in 25 kHz for co-channel operation for 10% of time and 50% of locations. This value is commonly used in many
20、 Region 1 countries in bilateral and multilateral coordination in the land mobile service. Exceeding the above interference field strength reflects the need for coordination and for detailed studies on interference effect. Since it is applied at the border of potentially affected administrations and
21、 specifies the limitation for interference field strength it is not dependant on different mobile service receiver characteristics. 3 Characteristics of radiolocation service (RLS) used for the sharing studies 3.1 Spectrum requirement The spectrum requirement in the 30-300 MHz frequency range is cur
22、rently up to 2 MHz for radiolocation systems. The band 154-156 MHz was proposed in order to address this requirement. 1Recommendation CEPT T/R 25-08 Rev.2008 Planning criteria and coordination of frequencies in the land mobile service in the frequency range 29.7-921 MHz. Rep. ITU-R M.2172 3 3.2 Tran
23、smitter and receiver characteristics used for the sharing study TABLE 1 Radiolocation service (RLS) systems characteristics Radar (narrow-band radar) Radar (wideband radar) Frequency band (MHz) 154-156 Output pulse power (min/max) (dBW) 27/46 40/46 Mean output power (min/max) (dBW) 22/41 35/41 Polar
24、ization Linear Pulse duration (s) 13 000 3 200 Duty cycle 0.322 Modulation type pulse Altitude above the ground level (m) 19 Antenna type Phased array Maximum antenna gain (dB) transmitter receiver 25 30 Maximum antenna gain on the horizon (dB) 9 Antenna pattern See 1.1 in Appendix 1 Main beam patte
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