Report ITU-R M.2335-0 (11/2014) Sharing and compatibility analysis of possible amateur service stations with fixed, land mobile, and radiolocation services in the frequency band 5 250-5 450 kHz and the aeronautical mobile service in an adjacent band M Series Mobile, radiodetermination, amateur and related satellite services ii Rep. ITU-R M.2335-0 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 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 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/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.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 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 Report was approved in English by the Study Group 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. Rep. ITU-R M.2335-0 1 REPORT ITU-R M.2335-0 Sharing and compatibility analysis of possible amateur service stations with fixed, land mobile, and radiolocation services in the frequency band 5 250-5 450 kHz and the aeronautical mobile service in an adjacent band (2014) TABLE OF CONTENTS Page 1 Introduction .................................................................................................................... 5 2 Background ..................................................................................................................... 5 3 Organization of Report ................................................................................................... 6 4 Study methods ................................................................................................................ 6 5 Results of studies ............................................................................................................ 7 5.1 Spectrum Occupancy Study (Annex 2) .............................................................. 7 5.2 Sharing and Compatibility Study Case A (Annex 3) .......................................... 7 5.3 Sharing and Compatibility Study Study Case B (Annex 4) ............................... 7 5.4 Sharing and Compatibility Study Study Case C (Annex 5) ............................... 8 5.5 Sharing and Compatibility Study Study Case D (Annex 6) ............................... 8 5.6 Sharing and Compatibility Study with Stations in the Mobile Service (Annex 7) ............................................................................................................ 8 5.7 Compatibility Study with Oceanographic Radar (Annex 8) ............................... 9 5.8 Compatibility with Stations in the Aeronautical Mobile Service (Annex 9) ...... 9 Annex 1 – Reference information ............................................................................................ 9 Annex 2 – Spectral occupancy within the frequency band 5 250-5 450 kHz as observed near Ottawa, Ontario, Canada ......................................................................................... 12 1 Introduction .................................................................................................................... 12 2 Data collection procedures ............................................................................................. 12 3 Observations ................................................................................................................... 13 4 Conclusions .................................................................................................................... 15 2 Rep. ITU-R M.2335-0 Page Annex 3 – Study Case A .......................................................................................................... 16 1 Compatibility of the amateur systems with the fixed systems ....................................... 16 1.1 Study Case: Pangnirtung NU to Makkovik NL .................................................. 17 1.2 Antenna assumptions .......................................................................................... 18 1.3 Study Data Tables ............................................................................................... 21 2 Analysis of the results..................................................................................................... 32 2.1 Circuit availability .............................................................................................. 32 3 Parameters used for compatibility study ........................................................................ 34 Annex 4 – Study Case B .......................................................................................................... 35 1 Scenario .......................................................................................................................... 35 2 Methodology ................................................................................................................... 36 2.1 Calculation of external noise at an fixed/land mobile station ............................. 36 2.2 Calculation of potential co-channel interference from an amateur station ......... 37 2.3 Calculation of potential adjacent channel interference from amateur stations to fixed/land mobile service receivers ................................................................ 39 3 Results ............................................................................................................................ 40 3.1 Result of potential co-channel interference ........................................................ 40 3.2 Result of potential adjacent channel interference ............................................... 48 4 Conclusions .................................................................................................................... 50 Annex 5 – Study Case C .......................................................................................................... 51 1 Characteristics of fixed stations used in the compatibility studies ................................. 51 2 Characteristics of amateur stations to be used in the frequency band 5 250-5 450 kHz ............................................................................................................. 52 3 Scenario of interference impact from amateur radio stations ......................................... 52 4 Methodology of interference impact assessment from amateur service stations to fixed/land mobile service, aeronautical service and oceanographic radars .................... 52 5 Analysis of the study results ........................................................................................... 53 5.1 Study results for multihop links using omnidirectional antennas under steady conditions ................................................................................................ 54 5.2 Study results for multihop links using directional antennas under steady conditions ............................................................................................................ 56 Rep. ITU-R M.2335-0 3 Page 5.3 Study results for multihop links using omnidirectional antennas under fading conditions ................................................................................................ 59 5.5 Study results for single-hop links using omnidirectional antennas under steady conditions ................................................................................................ 64 5.6 Study results for single-hop links using directional antennas under steady conditions ............................................................................................................ 66 5.7 Results for single-hop links using omnidirectional antennas under fading conditions ............................................................................................................ 68 5.8 Results for single-hop links using directional antennas under fading conditions ............................................................................................................ 70 5.9 Analysis of efficient usage of mitigation technique “listen-before- transmitting” for protection of FS receivers ....................................................... 73 6 Conclusions ...................................................................................................................