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