Policy on Intellectual Property Right (IPR)
1 Background
2 Characteristics of non-GSO FSS systems
3 Technical characteristics of GSO FSS networks
4 GSO protection criteria
5 Sharing between non-GSO systems and GSO FSS networks
5.1 Application of non-GSO operational parameters in determining
sharing considerations
5.2 Protection of GSO networks based on fading statistics only
5.3 Application of Methodology A’ from Recommendation ITU-R S.1323
5.4 Protection of the Earth-to-space GSO links
6 Frequency sharing in the 50/40 GHz frequency bands
7 Summary of Studies
7.1 Summary of Study 1
7.2 Summary of Study 2
7.3 Summary of Study 3
7.4 Summary of Study 4
7.5 Summary of Study 5
7.6 Summary of Study 6
7.7 Summary of Study 7
7.8 Summary of Study 8
7.9 Summary of Study 9
7.10 Summary of Study 10
7.11 Summary of Study 11
7.12 Summary of Study 12
Annex 1 — Study #1 for the development for sharing between non-GSO and GSO in
the 50/40 GHz frequency bands
1 Non-GSO system parameters
2 GSO system parameters
3 Background on methodology for deriving aggregate epfd limits using
Recommendation ITU-R S.1323
4 Description of sharing studies to develop a framework for sharing
between non-GSO and GSO in the 50/40 GHz frequency bands
4.1 Derivation of aggregate epfd limits using an iterative approach
and Recommendation ITU-R S.1323
4.1.1 Limitations of iterative derivation of epfd curves
based on Recommendation ITU‑R S.1323
4.1.2 epfd curves based on Recommendation ITU-R S.1323
taking into account propagation losses on the interfering signal path
4.2 Sharing between non-GSO and GSO FSS systems using
Recommendation ITU-R S.1323
4.3 Sharing between non-GSO and GSO FSS systems by allowing single
system GSO unavailability increase allowances
4.4 Sharing between non-GSO and GSO FSS systems by allowing single
system GSO unavailability increase allowances
5 Summary
Annex 2 — Study #2 for the development for sharing between non-GSO FSS and GSO
FSS in the 50/40 GHz frequency bands
1.1 Non-GSO FSS system
1.2 GSO system parameters
1.3 Propagation models
1.4 Time step calculation
1.5 Statistics gathered
1.6 Results
1.6.1 I/N and epfd cumulative distribution
functions
1.6.2 Convolution of interference and wanted signals
1.7 Discussion
1.7.1 I/N vs. epfd
1.7.2 Propagation and correlation
2.1 Non-GSO system
2.2 GSO system parameters
2.3 Propagation models
2.4 Description of simulation
2.5 Results of Simulation
2.5.1 Calculations of the impact of the non-GSO system on
the unavailability of the GSO link
2.6 Conclusion
Annex 3 — Study #3: Assessment of sharing of aggregate GSO interference
allowance among non-GSO systems in the 50/40 GHz frequency band
1 Comparison of Study #1 and Study #2
1.1 Comparison of VLEO and VMEO analysis studies
2 VLEO and VMEO composite epfd profiles
3 Observations
Annex 4 — Study 4: Considerations on non-GSO/GSO FSS sharing in the 50/40 GHz
band
1 Introduction
2 Methodology, parameters and assumptions
3 Results
3.1 Interference from a LEO satellite system into receiving GSO
earth stations
3.2 Interference from LEO earth stations into a GSO satellite
3.3 Interference from an equatorial MEO satellite system into
receiving GSO earth stations
3.4 Interference from earth stations operating with an equatorial
MEO satellite system into a GSO satellite
4 Conclusions
Annex 5 — Study 5: Research on epfd limits for a typical non-GSO system to GSO
system in the 50/40 GHz band
1 Introduction
2 System parameters
2.1 Non-GSO system parameters
2.2 GSO system parameters
3 Parameters of interference simulation scenarios
3.1 Time step and simulation duration
3.2 Rain attenuation models
4 Results
4.1 GSO beam pointing low latitude area
4.1.1 Downlink
4.1.2 Uplink
4.2 GSO beam pointing medium latitude area
4.2.1 Downlink
4.2.2 Uplink
5 Conclusion
Annex 6 — Study 6: Interference by a non-GSO system to a GSO system in the
50/40 GHz frequency band
1 Non-GSO system
2 GSO system parameters
3 Propagation models
4 Simulation run time
5 Statistics collection
6 Results
6.1 Scenario 1
6.1.1 Downlink for Gateway
6.1.2 Uplink for Gateway
6.1.3 Downlink for user terminal
6.1.4 Uplink for User Terminal
6.2 Scenario 2
6.2.1 Downlink for gateway
6.2.2 Uplink for Gateway
6.2.3 Downlink for User Terminal
6.2.4 Uplink for User Terminal
7 Conclusion
Annex 7 — Study 7: Sharing studies relevant to developing aggregate V-band epfd
limits
1 Introduction
2 GSO network parameters
2.1 Impact of degradation on data rate
3 epfd↓ technical analysis
4 epfd↑ technical analysis
5 Calculation of average percent throughput degradation from degradation
statistics
5.1 Model 1
5.2 Model 2
6 Application of the average percent throughput degradation calculation to
propagation fades and interference from non-GSO systems
Annex 8 — Study 8: Protection of GSO links from aggregate interference from
non-GSO networks based on fading statistics only
Annex 9 — Study 9: Study of sharing between GSO and non-GSO FSS systems in the
50/40 GHz frequency bands
1 Introduction
2 Current approaches
3 Study details and characteristics
Attachment 1 to Annex 9 — Analysis of interference into systems using
transparent transponders: joint effects of uplink and downlink fading and
interference
A.1 Technical Analysis
A.1.1 Uplink Analysis
A.1.2 Downlink Analysis with Transparent Transponder
A.1.3 Combined Uplink/Downlink Analysis with Transparent
Transponder
Attachment 2 to Annex 9 — Derivation of overall uplink and downlink degradation
in carrier-to-noise ratio
Annex 10 — Study 10: Sharing study relating (I/N) to spectral
efficiency of satellite networks using ACM
1 Introduction
2 GSO Network Parameters
2.1 Earth Station Parameters
2.2 Satellite Parameters
3 Impact of degradation in (C/N) on spectral efficiency
4 Definitions and assumptions
4.1 Basic definitions
4.2 Basic Assumptions
5 Uplink considerations
5.1 Clear-sky conditions
6 Downlink considerations
6.1 Clear-Sky conditions
6.2 Rain faded conditions
6.2.1 Degradation in downlink carrier-to-noise ratio
6.2.2 Effect of rain fade and interference on percent
degraded throughput
6.2.3 Case study of percent degraded throughput on
downlink
7 Long-Term considerations on sensitivity of percent degraded throughput
(%DTp) to I/N level in clear-sky
8 Conclusions
Annex 11 — Sharing studies relating to protection of GSO FSS networks using
adaptive coding and modulation from the operation of non-GSO FSS systems
1 Introduction
2 Overview of percent degraded throughput concept
3 Overview of percent degraded throughput on sharing studies using time
average approach
4 Percent degraded throughput as applied for non-GSO sharing computations
5 Overview of reserve capacity approach
6 Alternative reserve capacity approach
7 Conclusion
Annex 12 — Study #12 for the development for sharing between non-GSO and GSO
in the 50/40 GHz frequency bands
Attachment 1 to Annex 12
Attachment 2 to Annex 12
Annex 13 — GSO/FSS system parameters used in studies