Systems and methods for monitoring selected terrestrially used satellite frequency signals to reduce potential interference
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United States of America Patent
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Sep 22, 2009
Grant Date -
Jan 29, 2009
app pub date -
Sep 26, 2008
filing date -
Sep 14, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A satellite radiotelephone frequency band can be reused terrestrially by an ancillary terrestrial network even within the same satellite cell, using interference reduction/cancellation techniques. An interference reducer is responsive to a space-based component and to an ancillary terrestrial network. The interference reducer is configured to reduce interference in wireless communications that are received by the space-based component from first radiotelephones in the satellite footprint over a satellite radiotelephone frequency band using wireless communications that are received by the ancillary terrestrial network from selected ones of second radiotelephones in the satellite footprint over the satellite radiotelephone frequency band and/or wireless communications that are transmitted by the ancillary terrestrial network to the second radiotelephones in the satellite footprint over the satellite radiotelephone frequency band. The interference reducer may include a prefilter that is configured to determine the selected ones of the second radiotelephones.
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