CONTENTS

Policy on Intellectual Property Right (IPR)     ii
1 Introduction  1
2 Background  1
Annex 1  Scattering model calculations     2
1 Introduction  2
2 Analysis  2
        2.1 Overview   2
        2.2 Analysis of Recommendation ITU-R BT.805 mathematics  2
        2.3 Numerical example  4
        2.4 Extension of the analysis  5
                  2.4.1 Non-metallic turbine blades  5
                  2.4.2 Triangular turbine blades  6
                  2.4.3 Arbitrary orientation of turbine blades  9
                  2.4.4 Scattering from pylon  13
                  2.4.5 Effect of antenna directivity and reception geometry  18
Annex 2     19
1 Introduction  19
        1.1 Overview of study  20
        1.2 Measurement overview   21
2 Predicted performance with software models  21
        2.1 Overview   21
        2.2 Geographic summary  22
        2.3 Predicted interference map from pylon scattering  23
        2.4 Predicted interference map from blade scattering  25
        2.5 Predicted receiver performance  28
3 Measurement results  32
        3.1 Overview   32
        3.2 Measurement with single multipath component scattering  33
        3.3 Dynamic interference signal performance  35
        3.4 Measured impulse response  39
                  3.4.1 Overview   39
                  3.4.2 Backscattering case  40
                  3.4.3 Forward scattering case  42
        3.5 Effect of receiving antenna height and ground reflections  44
4 Conclusions  46