1、 Report ITU-R M.2170(12/2009)Compatibility analysis and results for radiolocation systems planned to operatein the 15.4 to 17.3 GHz band and aircraft landing system operating in the 15.4-15.7 GHz band as well as the radio astronomy service operating in the adjacent band 15.35-15.40 GHz, FSS systems
2、and aeronautical radionavigation systemsM SeriesMobile, radiodetermination, amateurand related satellites servicesii Rep. ITU-R M.2170 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocom
3、munication 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 World and Regional Radiocommunication Conferences and Rad
4、iocommunication 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 for the submission of patent statements and licensing d
5、eclarations 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 of ITU-R Reports (Also available online at http:/www.
6、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, amateur and related satellite services P Radiowave prop
7、agation 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 Report was approved in English by the Study Group under
8、 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.2170 1 REPORT ITU-R M.2170 Compatibility analysis and results for r
9、adiolocation systems planned to operate in the 15.4 to 17.3 GHz band and aircraft landing system operating in the 15.4-15.7 GHz band as well as the radio astronomy service operating in the adjacent band 15.35-15.40 GHz, FSS systems and aeronautical radionavigation systems (2009) 1 Introduction WRC-0
10、7 approved WRC-12 Agenda item 1.21, “to consider a primary allocation to the radiolocation service in the band 15.4-15.7 GHz, taking into account the results of ITU-R studies, in accordance with Resolution 614 (WRC-07)”, in order to provide adequate spectrum for new advanced radar systems to functio
11、n. Emerging requirements for increased image resolution and increased range accuracy necessitate wider emission bandwidths than are currently available. Allocating a primary radiolocation service in the 15.4-15.7 GHz band will provide additional spectrum for new advanced radar systems with increased
12、 image resolution and increased range accuracy that necessitate wider emission bandwidths than are currently available. Operation of radiolocation radars in this band will not adversely affect other co-primary services and should operate compatibly with the radio astronomy service in the adjacent 15
13、.35-15.40 GHz band. The 15.4-15.7 GHz band is allocated on a primary basis to the aeronautical radionavigation service (ARNS). There are no ICAO-standard ARNS systems that currently operate in this band although ICAO standards exist for aircraft weather radar systems. While the ARNS is recognized as
14、 a safety service as delineated in No. 4.10 of the Radio Regulations (RR), radiolocation services have demonstrated compatible operations with radionavigation radars in other bands over many years through the use of similar system characteristics such as low-duty cycle emissions and scanning beams a
15、s well as other interference reduction techniques. Studies within the ITU-R addressing compatibility between the radiolocation and radionavigation radars in other frequency bands provide reasonable evidence that sharing in the band 15.4-15.7 GHz between these services may be feasible. Recommendation
16、 ITU-R M.1730-1 contains the technical characteristics and protection criteria for radiolocation radars in the band 15.4-17.3 GHz and Recommendation ITU-R M.1372-1 identifies interference reduction techniques which enhance compatibility among radar systems. Also, Report ITU-R M.2076 (2006) contains
17、further mitigation factors for radiolocation interference to radionavigation radars in the 9 GHz band, many of which may apply to the band 15.4-15.7 GHz as well. There is also limited use of the band in some countries for non-ICAO aircraft landing systems. A portion of the band is also allocated to
18、the FSS limited to feeder links for non-GSO MSS and in both space-Earth and Earth-space directions, though there are no systems that operate in the band. The necessary compatibility studies per WRC-12 Agenda item 1.21, Resolution 614 (WRC-07) are included in this Report. 2 Systems characteristics Th
19、e following sections contain the radiolocation and non-ICAO Aircraft Landing System (ALS) technical characteristics that will be used in the compatibility analysis. Rep. ITU-R M.2170 2 2.1 Radiolocation system Recommendation ITU-R M.1730-1 contains technical characteristics and protection criteria f
20、or radiolocation radars in the band 15.7-17.3 GHz only, where the band 15.7-17.3 GHz is already allocated to the radiolocation service on a primary basis. The radiolocation System-6 is used in the compatibility analysis for this Report and the characteristics are shown in Table 1. TABLE 1 Radiolocat
21、ion systems characteristic in the 15.4-17.3 GHz band Characteristics System-6 Function Search, track and ground-mapping (multi-function) Platform type Airborne (typical operational height = 8 500 m) Tuning range (GHz) 15.4-17.3 Modulation Linear FM chirp Transmit peak power (W) 500 Pulse width (s) 0
22、.05-50 Pulse rise/fall time (ns) 5-100 Pulse repetition rate (pps) 200-20 000 Maximum duty cycle Up to 0.2(1)Output device Travelling wave tube Antenna pattern type Pencil Antenna type Phased array Antenna polarization Linear Antenna gain (dBi) 35 Antenna elevation beamwidth (degrees) 3.2 Antenna az
23、imuthal beamwidth (degrees) 3.2 Antenna horizontal scan rate 1-30/s Antenna horizontal scan type (continuous, random, sector, etc.) 45 (electronic) Antenna vertical scan rate 1, 5/s Antenna vertical scan type +5 to 45 (electronic) Antenna 1stside-lobe level 3.5 dBi at 5.2 Antenna height Aircraft altitude 1st/2ndreceiver IF 3 dB bandwidths (MHz) 25 Receiver noise figure (dB) 5 Minimum discernible signal (dBm) 100 Chirp bandwidth (MHz) = 10 dBIN Maximum separationdistance where/ = 10 dB IN SeparationdistanceTypical scenario IN/ = 10 dBIN/ increasesIN/ indB
