Method and apparatus to provide improved microwave interference robustness in RF communications devices
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United States of America Patent
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Mar 9, 2004
Grant Date -
N/A
app pub date -
Mar 16, 2000
filing date -
Mar 16, 2000
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Abstract
A RF communications system and method having improved RF interference characteristics for use with at least a pair of RF transceivers which communicate using a packet transfer protocol, in a frequency hopping scheme, wherein the packets may be of various lengths, wherein each frequency occupies a frequency channel slot in a RF band, and wherein a subsequent frequency is known, including, in at least one of the transceivers: a detector for detecting distressed channel frequencies having an unacceptable level of interference thereon; a tracker for keeping track of the distressed channel frequencies and of channel frequencies which are not distressed; a look-ahead mechanism for maintaining a list of bad channel frequencies of future slots; a scheduling algorithm to avoid beginning packet transmission on bad channel frequency slots; and a frequency selector for selecting a next transmission frequency from the available non-distressed channel frequencies.
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