Sub-optimal adaptive cancellation for frequency re-use satellites
Abstract
The performance of unitary cancellers, i.e. lossless passive waveguide networks in which all the working elements are phase shifters, is investigated theoretically for the case when significant differential attenuation is present. It is shown that unitary systems of both one- and two-parameter types can be effective at moderate frequencies such as 11/14 GHz where differential attenuation is not too severe. A one-parameter system could be effective for cross polarization due to ice having a varying apparent canting angle along the path.
- Publication:
-
International Conference on Radio Spectrum Conservation Techniques
- Pub Date:
- 1980
- Bibcode:
- 1980rsct.conf..122M
- Keywords:
-
- Adaptive Control;
- Communication Satellites;
- Frequency Reuse;
- Optimal Control;
- Satellite Transmission;
- Atmospheric Attenuation;
- Cross Polarization;
- Microwave Attenuation;
- Raindrops;
- Superhigh Frequencies;
- Communications and Radar