Filters for combined radiotelephone/GPS terminals
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United States of America Patent
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Sep 2, 2014
Grant Date -
N/A
app pub date -
Feb 12, 2010
filing date -
Jul 2, 2002
priority date (Note) -
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Abstract
A satellite radiotelephone system includes a space-based component, a plurality of ancillary terrestrial components, and a plurality of radiotelephones. The space-based component is configured to provide wireless radiotelephone communications using satellite radiotelephone frequencies. The plurality of ancillary terrestrial components include a plurality of ancillary terrestrial component antennas configured to provide wireless radiotelephone communications using at least one of the satellite radiotelephone frequencies in a radiation pattern that increases radiation below the horizon compared to above the horizon. The plurality of radiotelephones are configured to communicate with the space-based component and with the plurality of ancillary terrestrial components. Each radiotelephone also includes a GPS signal processor and a GPS mode filter that is configured to suppress energy at (1575.42−Δ) MHz, where 0<Δ≦16.42 MHz. Related radiotelephones and methods are also discussed.
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