Independent satellite-based communications systems sharing common frequency spectrum and method of operation thereof
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United States of America Patent
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Apr 13, 1999
Grant Date -
N/A
app pub date -
Jul 31, 1995
filing date -
Jul 31, 1995
priority date (Note) -
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Abstract
Multiple, different, independent constellations (10, 20) of satellites (2, 21-23) share a portion of a common frequency spectrum such as a single carrier frequency. The satellites' antennas (11) may be either multi-beam or omni-directional, while those of earth stations (13, 14) are directional. When interference occurs between communications of a satellite (31) of a first constellation (10) and a satellite (41) of a second constellation (20), any of several interference-mitigation options may be employed, such as the first satellite (31) handing off communications to a second satellite (32) of the same constellation (10), or temporarily suspending communications. The remedial action may occur in response to either predicted or detected interference.
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