CONTENTS

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