Systems and methods for removing undesired signals in instrument landing systems
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United States of America Patent
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Aug 5, 2008
Grant Date -
Mar 29, 2007
app pub date -
Sep 27, 2005
filing date -
Sep 27, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of removing undesired signals in an aviation guidance system may include receiving at least one first desired signal having a first frequency of amplitude modulation, receiving at least one second desired signal having a second frequency of amplitude modulation, and receiving at least one undesired signal having any frequency including a frequency that is substantially the same as or a subharmonic of at least one of the first and second desired signals. The first and second frequencies of amplitude modulation are phase synchronous, and the undesired signals are non-synchronous with at least one of the first and second desired signals. The method may also include identifying the undesired signals and removing the undesired signals.
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