Policy on Intellectual Property Right (IPR)
1 Introduction
2 Incumbent service
characteristics and protection criteria
3 Characteristics of
oceanographic radars
4 Theoretical ground-wave
analysis
4.1 Ground-wave
propagation model
4.2 Input parameters for
GRWAVE based analysis
4.3 Path loss calculation
4.4 Derivation of noise
and maximum interference levels
4.4.1 External
noise calculation
4.4.2 Man-made
noise
4.4.3 Galactic
noise
4.4.4 Atmospheric
noise
4.4.5 Resulting
external noise calculation
4.6 Results
4.6.1 Land path
4.6.2 Sea path
5 Frequency dependent rejection
analysis
5.1 Transmitter masks
5.2 Receiver selectivity
curve
5.3 Frequency separation
analysis results
6 Theoretical sky-wave analysis
6.1 Interference from
oceanographic radars to the fixed and mobile services by sky-wave wanted link
signal to noise ratio-based analysis
6.1.1 Methodology
6.1.2 Results
6.1.3 Discussion
6.2 Sky-wave interference
from fixed systems to oceanographic radars
6.2.1 Analysis
methodology
6.2.2 Analysis
results
6.3 Aggregate sky-wave
interference from multiple oceanographic radars to a fixed system
6.4 RECAREA sky-wave
analysis over Europe
6.4.1 Sky-wave
propagation model
6.4.2 Methodology
6.4.3 External
noise calculation
6.4.4 Short-term
interfering time
6.4.5 Long-term
interfering time
6.4.6 Results
6.5 Worldwide RECAREA
sky-wave analysis
6.5.1 Sky-wave
propagation model
6.5.2 Methodology
6.5.3 Worldwide
RECAREA sky-wave analysis results
7 Results of field measurements
7.1 Spectrum occupancy
7.2 Ground-wave
interference measurements
7.3 Sky-wave measurements
8 Interference mitigation
techniques
9 Summary
9.1 Ground-wave analysis
9.1.1 Results
for frequencies below 30 MHz
9.1.2 Results
for frequencies above 30 MHz
9.2 Sky-wave analysis
9.3 Frequency dependent rejection analysis
9.4 Field measurements
9.4.1 Spectrum
occupancy measurements
9.4.2 Groundwave interference measurements
9.4.3 Sky-wave measurements
9.5 Experimental analysis
9.6 Interference
mitigation
10 Conclusions
Attachment 1 Results from the sky-wave signal to noise
ratio-based link analysis
Attachment 2 Calculation of the interfering time ratio for
oceanographic radars in each frequency band
2-1 5 MHz (System 1, Table 1)
2-2 9 MHz (Systems 5 and 10,
Table 1)
2-3 13 MHz (Systems 2 and 6,
Table 1)
2-4 16 MHz (System 7, Table
1)
2-5 25 MHz (Systems 3, 8, 11,
and 12, Table 1)
2-6 45 MHz (Systems 4 and 13,
Table 1)
Attachment 3 Calculation of external noise levels in the
different frequency bands
3-1 5 MHz
3-2 9 MHz
3-3 13 MHz
3-4 16 MHz
3-5 25 MHz
Attachment 4 Results from RECAREA
sky-wave analysis worldwide
Attachment 5 Results of CW
propagation measurements within the frequency band 3-50 MHz
5-1 Measurement objectives, system
and methodology
5-1.1 Measurement objectives
5-1.2 Measurement system
5-1.3 Measurement methodology
5-2 Analysis methodology
5-3 Measurements
5-3.1 40.18 and 43.689 MHz measurements
5-3.2 25 MHz
measurements
5-3.3
41.9 MHz measurements
5-4 Conclusions
5-5 Summary
Attachment 6 Observation of the radio
environment in the frequency
band 3-50 MHz
6-1 Purpose
6-2 System overview
6-3 Test and results
6-3.1 3 to 10 MHz range
6-3.2 10 to 20 MHz
range
6-3.3 20 to 50
MHz range
6-4 Calculations and analysis
6-4.1 Calculations
Calculation of Interference level for RD-02
Calculation of Interference level for RD-03
6-4.2 Analysis
6-5 Conclusion and remarks
Attachment 7 Observation of
ground-wave oceanographic radar emission impact into HF receivers
Measurements to determine potential interference to mobile
stations in the frequency band 10 to 13.5 MHz from oceanographic radars
7-1 Scope
7-2 Introduction
7-3 Oceanographic radar system
7-4 HF radio system
7-5 Measurement set-up
7-6 Measurements results
7-7 Conclusions
Attachment 8 Observation of sky-wave
oceanographic radar emission into HF receivers
8-1 Introduction
8-2 Measurements of potential
interference via sky-wave
8-3 Conclusions
Attachment 9 Oceanographic radar
interference mitigation techniques and spectrum efficiency improvements –
Technical and operational considerations
9-1 Introduction
9-2 Geometry of problem
9-3 List of potential interference
mitigation techniques
9-3.1 Time multiplexing
9-3.2 Reduce oceanographic
radar spectral occupancy
9-4 Reduce interfering energy
density
9-4.1 Directive transmit
radiation patterns
9-4.2 Transmit antenna
arrays to minimize ground-wave signals back over land
9-4.3 Directive effect of
land to minimize ground-wave signals back over land
9-4.4 Directive effect of
land to minimize sky-wave signal interference back over land
9-4.5 Added horizon
attenuations not included in above studies
9-5 Reduce interfering energy occurrence
9-5.1 Use spread-spectrum
techniques
9-5.2 Lower oceanographic
radar radiated power
9-6 Reducing out-of-band
interference
9-6.1 Pulse shaping,
filtering and signal gating
9-6.2 Low-pass filtering
9-6.3 Band-pass filtering
9-6.4 Pulse shaping
9-6.5 Signal gating
9-7 Conclusions
Attachment 10 Study of sky-wave
propagation interference impact in the Darwin region
10-1 Introduction
10-2 Method
10-2.1 Incumbent receiver
10-2.2 Sky-wave propagation
model
10-2.3 External noise model
10-2.4 Calculation of INR
10-3 Results
10-3.1 Interference
occurrence
10-4 Conclusions
Attachment 11 An experimental study for the evaluation of
compatibility criteria between HF oceanographic radars and digital data systems
11-1 Introduction
11-2 Description of experimental
setup
11-3 Description of experiment
11-4 Results and conclusion
Attachment 12 Glossary