FINAL REPORT - Stakeholders - Ofcom
FINAL REPORT - Stakeholders - Ofcom
FINAL REPORT - Stakeholders - Ofcom
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3.4.7 Possible New Technologies (in-band) ..............................................................109<br />
3.4.8 Replacement Technologies (radio, other or none)............................................110<br />
3.4.9 Allocation Sharing Opportunities.......................................................................111<br />
3.4.10 Summary Of Possible Overall Spectral Efficiency Improvements.....................113<br />
3.4.11 Conclusions and Recommendations ................................................................115<br />
3.4.12 Note on Mobile Navigation Aids – Radar Altimeters .........................................121<br />
3.4.13 Note on Mobile Navigation Aids – Airborne Radar ...........................................122<br />
4 Maritime Radiodetermination ...................................................................................... 124<br />
4.1 Introduction 124<br />
4.1.1 Background.......................................................................................................124<br />
4.1.2 Frequency Allocations.......................................................................................125<br />
4.2 Ground Based 126<br />
4.2.1 MSR (Maritime Surveillance Radar) .................................................................126<br />
4.2.2 RACONs ...........................................................................................................131<br />
4.2.3 SHF 14 GHz Ship Berthing ...............................................................................133<br />
4.3 Shipborne 135<br />
4.3.1 MSR (Maritime Surveillance Radar) .................................................................135<br />
4.3.2 SHF 9 GHz SARTs ...........................................................................................136<br />
4.3.3 Radar Target Enhancers (RTEs) ......................................................................138<br />
4.4 Conclusions and Recommendations 139<br />
5 Aeronautical Communications.................................................................................... 145<br />
5.1 Introduction 145<br />
5.2 Frequency Allocations (International & National) 146<br />
5.2.1 HF Communications (R) and (OR)....................................................................146<br />
5.2.2 VHF Communications(R) and (OR) ..................................................................146<br />
5.2.3 UHF Communications (NATO 230 – 380 MHz) ................................................147<br />
5.2.4 UHF Communications > 862 MHz – Public Correspondence ...........................147<br />
5.2.5 1.5/1.6 GHz – Satellite ......................................................................................147<br />
5.3 Current technology description 148<br />
5.3.1 DSB/AM (analogue) voice.................................................................................148<br />
5.3.2 HF voice............................................................................................................148<br />
5.3.3 Current data link technology .............................................................................149<br />
5.3.4 UHF Communications (NATO 230 – 380 MHz) ................................................151<br />
5.3.5 UHF Communications > 862 MHz – Public Correspondence ...........................152<br />
5.4 Operational requirements 152<br />
5.4.1 Overview of operational requirements ..............................................................152<br />
5.4.2 Role of HF and HFDL in supporting the operational requirements ...................152<br />
5.4.3 Role of VHF analogue communications in supporting the operational<br />
requirements....................................................................................................................153<br />
5.4.4 Relationship between airspace capacity and VHF spectrum requirements......153<br />
5.4.5 AMSS................................................................................................................154<br />
5.5 Regulatory and Standardisation Issues 154<br />
5.5.1 HF Communications (R) and (OR)....................................................................154<br />
5.5.2 VHF Communications Analogue and Digital (R) and (OR) ...............................154<br />
5.5.3 Extension of VHF band .....................................................................................154<br />
5.6 Possible Improvements to existing technology 155<br />
5.6.1 VHF voice: 8.33 kHz channelisation .................................................................155<br />
5.6.2 Movement of HF voice services to HFDL .........................................................156<br />
5.6.3 Movement of HFDL to Satcom..........................................................................156<br />
5.6.4 VHF datalink: upgrade of ACARS to VDL Mode 2 and initial transfer of ATIS and<br />
controller pilot dialogue....................................................................................................156<br />
5.6.5 VHF voice: reducing long term spectrum requirements for voice .....................159<br />
5.6.6 UHF Communications (NATO 230 – 380 MHz) ................................................160<br />
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