Policy on Intellectual Property Right (IPR)
1 Introduction
2 Background
Annex 1 Scattering model calculations
1 Introduction
2 Analysis
2.1 Overview
2.2 Analysis of Recommendation ITU-R
BT.805 mathematics
2.3 Numerical example
2.4 Extension of the analysis
2.4.1 Non-metallic turbine
blades
2.4.2 Triangular turbine
blades
2.4.3 Arbitrary orientation
of turbine blades
2.4.4 Scattering from
pylon
2.4.5 Effect of antenna
directivity and reception geometry
Annex 2 The effect of the scattering of digital television signals from
wind turbines
1 Introduction
1.1 Overview of study
1.2 Measurement overview
2 Predicted performance with software
models
2.1 Overview
2.2 Geographic summary
2.3 Predicted interference map from
pylon scattering
2.4 Predicted interference map from
blade scattering
2.5 Predicted receiver performance
3 Measurement results
3.1 Overview
3.2 Measurement with single
multipath component scattering
3.3 Dynamic interference signal
performance
3.4 Measured impulse response
3.4.1 Overview
3.4.2 Backscattering case
3.4.3 Forward scattering
case
3.5 Effect of receiving antenna
height and ground reflections
4 Conclusions
Annex 3 Summary of measurements and analysis of the results
1 Preliminary results from field trials
1.1 Signal scattering from a wind
turbine
1.2 Wind turbines impact to DTV
reception quality
2 Contributions to the draft new
Recommendation
3 Acknowledgements
4 References
Appendix 1 to Annex 3 Field trials
1 Objectives of the field trials
2 Geographic overview
3 Planning
4 Measurement equipment
Appendix 2 to Annex 3 Empirical analysis of the scattering signals from
wind turbines
1 Introduction
1.1 Wind turbines structure and
nature of the scattered signals
1.2 Scattering pattern
2 Modification to Recommendation ITU-R
BT.805
3 Methodology
3.1 Use of the channel impulse
response for the evaluation of the scattered signals
3.2 Types of measurements
4 Results and discussion
4.1 Relative amplitude of the
scattered signals from wind turbines
4.2 Variability of the scattered
signals due to the blade rotation
4.3 Variability of the scattered
signals due to blade pitch variation
4.4 Variability of the scattered signals
due to the variation in the rotor orientation (yaw)
4.5 Geometry of wind turbines
location with respect to transmitter and receiver locations
5 Analysis and discussion
Appendix 3 to Annex 3 Wind turbines impact to terrestrial DTV services
in the UHF band
1 Introduction
2 Methodology
3 Results and discussion
3.1 Backscattering
3.2 Forward scattering
4 Conclusions