CONTENTS

Policy on Intellectual Property Right (IPR)
Study 1
�1���� Introduction
�2���� Executive summary
�3���� Background
�4���� Measurement and analysis overview
�5���� Summary
�6���� Conclusions
Study 2� European Radar adjacent band selectivity
�1��� �Summary
�2���� Introduction
�3���� Background
�4���� Scope
�5���� Work undertaken to date
������� 5.1���� Initial study
����������������� 5.1.1���� Co-channel interference
����������������� 5.1.2���� Adjacent channel blocking
������� 5.2���� Site 1 Flight Trials, Phase 1
������� 5.3���� Design authority study
������� 5.4���� Site 1 Flight Trials, Phase 2
������� 5.5���� Site 2 Trial
������� 5.6���� Predicted impact on other aeronautical radars
�6���� Conclusion
Annex 1 to Study 1� Interference measurements at NEXRAD field locations
������� 1.1���� NEXRAD configuration for measurement and characterization of interference signals
������� 1.2���� Interference azimuth-scan results
������� 1.3���� Elevation-scan results for the interference signals
������� 1.4� ���Measurements of the interference time domain envelopes
������� 1.5���� Spectrum measurements of the interference through the NEXRAD antennas
������� 1.6���� Identification of the interference mechanism
����������������� 1.6.1���� Front-end overload condition
����������������� 1.6.2���� Appearance of front-end overload responses in the time domain
����������������� 1.6.3���� Appearance of out of band emissions in the time domain (Rabbit Ears)
����������������� 1.6.4���� Additional proposed tests for front-end overload
����������������� 1.6.5���� WiMAX Turn-Off test in Jacksonville
����������������� 1.6.6���� Vector signal analyzer recordings of the interference signal
������� 1.7���� Identification of the interference source locations
������� 1.8���� Verification of grand rapids BRS/EBS emissions on identified towers
Annex 2 of Study 1� NEXRAD technical characteristics
������� 2.1���� NEXRAD radars operating in the band 2 700-3 000 MHz
������� 2.2���� NEXRAD receiver design
������� 2.3���� Frequency-response measurements of NEXRAD receiver stages
������� 2.4���� NEXRAD RF gain compression measurement
������� 2.5���� Summary of NEXRAD receiver electromagnetic compatibility characteristics
������� 2.6���� NEXRAD frequency dependent rejection
����������������� 2.6.1���� Calculation of frequency-dependent rejection
����������������� 2.6.2���� Frequency dependent rejection for NEXRAD radar
������� 2.7���� Calculation of protection distances
������� 2.8���� Calculated separation distances for 0 degrees of WiMAX antenna down-tilt
������� 2.9���� Summary of electromagnetic compatibility frequency-separation distance curves
Annex 3 of Study 1
������� 3.1���� Technical characteristics of 2.6-2.7 GHz WiMAX base stations
������� 3.2���� WiMAX 2.6-2.7 GHz spectrum channel plan in the United States
������� 3.3���� WiMAX base station antenna characteristics and frequency response
������� 3.4���� Measured technical characteristics of radiated WiMAX signals
������� 3.5���� Radiated WiMAX power as a function of measurement detection mode and bandwidth
������� 3.6���� Unfiltered hardline coupled measurements of WiMAX emission spectra
������� 3.7���� Hardline-coupled WiMAX measurement system set-up
������� 3.8���� WiMAX base station emission spectra without output filtering
��� ����3.9���� Summary of WiMAX base station emission characteristics
Annex 4 of Study 1� Adjacent-band interference mitigation options
������� 4.1���� Down-Tilting of WiMAX base station transmitter antennas
������� 4.2���� Off-tuning WiMAX base station transmitters from upper WiMAX band edge
������� 4.3���� Installation of filters on WiMAX base station transmitters
������� 4.4���� Establishing larger physical separation distances between WiMAX transmitters and NEXRAD receivers when frequency separations are small
������� 4.5���� Reduction in the heights of WiMAX base station transmitter antennas
������� 4.6���� Retuning NEXRAD frequencies enough to mitigate interference
References
Abbreviations/Acronyms