Repeaters for wireless communication systems
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United States of America Patent
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Jan 22, 2013
Grant Date -
Dec 22, 2011
app pub date -
Aug 29, 2011
filing date -
Jul 20, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A repeater and associated method of use includes at least one antenna element for communicating in one direction and at least one antenna element for communicating in another direction. A radio frequency uplink path and a radio frequency downlink path are coupled between the antennas. At least one of the radio frequency uplink path or the radio frequency downlink path includes an adaptive cancellation circuit. The adaptive cancellation circuit is configured to generate a cancellation signal without requiring an injected signal. The cancellation signal, when added to a radio frequency signal in the respective uplink and downlink paths, substantially reduces feedback signals present in the radio frequency signal.
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