Report ITU-R M.2478-0 (09/2019) Spectrum needs for the amateur service in the frequency band 50-54 MHz in Region 1 and sharing with mobile, fixed, radiolocation and broadcasting services M Series Mobile, radiodetermination, amateur and related satellite services ii Rep. ITU-R M.2478-0 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 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, 2019 ITU 2019 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rep. ITU-R M.2478-0 1 REPORT ITU-R M.2478-0 Spectrum needs for the amateur service in the frequency band 50-54 MHz in Region 1 and sharing with mobile, fixed, radiolocation and broadcasting services (2019) TABLE OF CONTENTS Page 1 Introduction .................................................................................................................... 7 1.1 Background to this Report .................................................................................. 7 1.2 Structure of this Report ....................................................................................... 8 1.3 Geographic considerations .................................................................................. 8 2 Current usage of the 50-54 MHz frequency band in Region 1 ....................................... 8 2.1 The amateur service ............................................................................................ 8 2.2 The radiolocation service .................................................................................... 9 2.3 The broadcasting service .................................................................................... 9 2.4 The fixed and mobile services ............................................................................ 10 2.5 Inter-regional sharing between services ............................................................. 11 2.6 Others applications in the 50-54 MHz frequency band ...................................... 11 3 Spectrum needs for the amateur service in Region 1 ..................................................... 11 3.1 General considerations ........................................................................................ 11 3.2 Background on current usage on national basis in Region 1 .............................. 11 3.3 Other envisaged applications .............................................................................. 12 3.4 Designated application categories to be taken into account in spectrum needs estimation ............................................................................................................ 12 3.5 Application based assessment of spectrum needs .............................................. 13 3.6 Study 1 based on spectrum occupancy and contest log data analysis ................ 13 3.7 Study based on estimations and long term experience ....................................... 16 3.8 Reasons for differences between the studies ...................................................... 18 3.9 Summary of spectrum needs from the studies .................................................... 18 3.10 Status of possible allocation ............................................................................... 20 Page 2 Rep. ITU-R M.2478-0 4 Characteristics of amateur stations for sharing studies .................................................. 20 4.1 Global characteristics .......................................................................................... 20 4.2 Specific Region 1 characteristics ........................................................................ 20 4.3 Antenna type and polarization ............................................................................ 21 4.4 Propagation Factors ............................................................................................ 22 5 Sharing with the mobile service ..................................................................................... 22 5.1 System parameters of the mobile service ........................................................... 23 5.2 Minimum coupling loss calculations .................................................................. 24 5.3 Radio Interference coverage mapping ................................................................ 28 5.4 A Monte-Carlo simulation of amateur service versus mobile service using the P.2001-2 propagation model ............................................................................... 28 5.5 A Monte-Carlo simulation using the CEPT SEAMCAT simulation software ... 30 5.6 Sharing possibilities ............................................................................................ 31 5.7 Summary of conclusions ..................................................................................... 33 6 Sharing with the fixed service ........................................................................................ 33 7 Sharing with the radiolocation service ........................................................................... 33 7.1 Background ......................................................................................................... 33 7.2 Study details ........................................................................................................ 34 7.3 Study results ........................................................................................................ 34 7.4 Regulatory aspects .............................................................................................. 34 8 Sharing with the broadcasting service ............................................................................ 34 8.1 Sharing study details ........................................................................................... 34 8.2 Study 1 description ............................................................................................. 34 8.3 Study 1 results ..................................................................................................... 35 8.4 Study 2 description ............................................................................................. 35 8.5 Study 2 results ..................................................................................................... 35 8.6 Study 3 description ............................................................................................. 36 8.7 Study 3 results ..................................................................................................... 37 8.8 Summary of study results ................................................................................... 37 9 Mitigation Factors........................................................................................................... 38 10 Conclusion of the Report ................................................................................................ 39 Rep. ITU-R M.2478-0 3 Page 10.1 Study components ............................................................................................... 39 10.2 Spectrum needs ................................................................................................... 39 10.3 Sharing with the mobile service ......................................................................... 39 10.4 Sharing with the broadcasting service ................................................................ 39 10.5 Sharing with the radiolocation service ............................................................... 40 10.6 Status of allocation ............................................................................................. 40 Annex 1 – Spectrum needs and associated information .......................................................... 40 A1.1 Introduction ......................................................................................................... 40 A1.2 Regulatory history .............................................................................................