1 Introduction
Annex 1 - System parameters of
unplanned BSS systems and associated feeder links in frequency bands
17.3-17.8 GHz and 24.75-25.25 GHz
Appendix 1 to Annex 1 -
Examples of system parameters of unplanned BSS systems and associated feeder
links in frequency bands 17.3-17.8 GHz and 24.75-25.25 GHz
Appendix 2 to Annex 1 - A
study of orbital separation requirements for the unplanned BSS and associated
feeder links in frequency bands 17.3-17.8 GHz and 24.75-25.25 GHz
1 Introduction
2 Methodology
2.1
Assumptions
3 Results
3.1
Homogeneous model for interfering
system based on wanted system
3.2
Inhomogeneous model for interfering
system based on different modulation schemes
4 Conclusion
Appendix 3 to Annex 1 - A
further study of orbital separation requirements for BSS and associated feeder
links in frequency bands 17.3-17.8 GHz and 24.75-25.25 GHz
1 Introduction
2 Assumptions
3 Results
3.1
Homogeneous model for interfering
system based on wanted system
3.1.1
Case 1: using QPSK modulation
3.1.2
Case 2: using 8-PSK modulation
3.1.3
Case 3: using 16-APSK modulation
3.1.4
Case 4: using 32-APSK modulation
3.2
Inhomogeneous model for interfering
system based on different modulation methods
4 Conclusion
Annex 2 - System parameters of BSS
systems in frequency band 21.4-22.0 GHz and associated feeder links
1 Study items of 21 GHz band broadcasting
satellites
2 Downlink receiving earth station antenna patterns
2.1 Conditions for the measurement
2.2 Measured
antenna patterns
3 Example of the 21 GHz band broadcasting
satellites
3.1
A promising satellite transmitting
antenna technique to achieve the locally-variable e.i.r.p. system
3.2
Service availability for the BSS with
the increase in e.i.r.p. in the band 21.4-22 GHz
3.3
Attenuation caused by precipitation and
other meteorological factors in the band 21.4-22 GHz
3.4
Downlink e.i.r.p. or pfd in the band
21.4-22 GHz
3.5
Examples of BSS utilizing the
locally-variable e.i.r.p. system in the band 21.4-22 GHz
3.6
Conclusion
4
A study of antenna radiation pattern of
a variable e.i.r.p. broadcasting-satellite system in the 21 GHz band
4.1
Introduction
4.2
Simulation of radiation pattern design
4.3
Conclusion
5 C/(N + I)
margins in the sharing situations for BSS in the 21 GHz band
5.1
Introduction
5.2
Assumed interfering situation
5.3
An example of BSS system parameters for
this study
5.4 Applied
methodologies
5.5 Summary of calculation results of C/(N + I)
5.5.1
C/(N + I) in the case of using same modulation
scheme for the locally-variable e.i.r.p. satellite
5.5.2
C/(N + I) in the case of using different
modulation schemes for the locally-variable e.i.r.p. satellite
5.5.3
Consideration of the worst case of C/(N + I)
margin for the receiving earth station A and its duration of interference
5.5.4
C/(N + I) when using conventional BSS
5.6
Conclusion
6
Methodology to estimate unwanted
emissions from BSS (21.4-22.0 GHz)
6.1
Introduction
6.2
Methodology
6.2.1
Technical items in regard to unwanted
emissions
6.2.2
Example of analysis of unwanted
emissions falling into the RAS band
6.3
Estimation of spectral regrowth of
digital modulated signal due to transponder non‑linearity and TWT noise
falling into RAS band
6.3.1
Assumption of transmission parameters
for BSS system and block diagram of simulation
6.3.2
Spectral regrowth for PSK signal
6.3.3
Estimation of noise originating from
TWTA
6.3.4
Improvement in the out-of-band
rejection of filters
6.3.5
Unwanted emissions in the RAS band from
the BSS system
6.4
Conclusion
7 Transmission schemes for satellite broadcasting
utilizing the receiver with a storage function
7.1
Parity-symbols time differential (PTD)
transmission scheme
7.2
Method of simulation using the measured
rain attenuation data
7.3
Simulation results of non-real-time
transmission schemes
7.3.1
Modulation for PTD
7.3.2
Comparison of PTD with TD and real-time
transmission
7.3.3
Dependence on the rain attenuation
margin
7.4
Conclusion