CONTENTS

RECOMMENDATION  ITU-R  F.1669-1     1
Interference criteria of fixed wireless systems operating in the 37-40 GHz and 40.5-42.5 GHz bands with respect to satellites in the geostationary orbit     1
Scope     1
Annex 1  Derivation of FS protection criteria in the 38 GHz and 40 GHz bands  to be applied in the GSO sharing scenarios     4
1 Introduction  4
2 FS fade margins  4
3 Derivation of the I/N mask  5
4 I/N criteria mask  5
5 Noise level reference  6
Appendix 1 to Annex 1     7
Appendix 2 to Annex 1  Impact of interference on FS systems     8
1 Introduction  8
2 I/N calculations  9
Appendix 3 to Annex 1  Correlation of fading on signal interference and determination of I/N masks     11
1 Temporal approach methodology  11
2 Rain cell size model 13