Repeaters for wireless communication systems
First Claim
1. A repeater comprising:
- 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 coupled between the antenna elements; and
an adaptive cancellation circuit in at least one of the radio frequency uplink path and the radio frequency downlink path, the adaptive cancellation circuit configured to generate a cancellation signal without requiring an injected signal;
a summing junction, the summing junction configured to receive and sum the cancellation signal and an incoming radio frequency signal from at least one of the uplink path and the downlink path;
wherein the cancellation signal substantially reduces feedback signals present in a radio frequency signal when the cancellation signal is added to the radio frequency signal in at least one of the respective uplink and downlink paths.
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Accused Products
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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Citations
20 Claims
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1. A repeater comprising:
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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 coupled between the antenna elements; and an adaptive cancellation circuit in at least one of the radio frequency uplink path and the radio frequency downlink path, the adaptive cancellation circuit configured to generate a cancellation signal without requiring an injected signal; a summing junction, the summing junction configured to receive and sum the cancellation signal and an incoming radio frequency signal from at least one of the uplink path and the downlink path; wherein the cancellation signal substantially reduces feedback signals present in a radio frequency signal when the cancellation signal is added to the radio frequency signal in at least one of the respective uplink and downlink paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
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10. A method of repeating a radio frequency signal comprising:
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receiving the radio frequency signal at an antenna element of a repeater having at least one antenna element for communicating in one direction and at least one antenna element for communicating in another direction; routing the radio frequency signal through at least one of a radio frequency uplink path and a radio frequency downlink path coupled between the antenna elements; transmitting the radio frequency signal from the other of the antenna elements; and substantially reducing interference feedback signals between the antenna elements in at least one of the uplink path and a downlink paths using a cancellation signal generated by an adaptive cancellation circuit without requiring an injected signal; and generating the cancellation signal and adding the cancellation signal and an incoming radio frequency signal from at least one of the uplink path and the downlink path for reducing feedback signals. - View Dependent Claims (11, 13, 14, 15)
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16. A repeater comprising:
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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 coupled between the antenna elements; and an adaptive cancellation circuit in at least one of the radio frequency uplink path and the radio frequency downlink path, the adaptive cancellation circuit configured to process a digitally sampled signal in the at least one of the uplink path and downlink path using a digital signal processor circuit that runs a digitally adaptive algorithm and to generate a cancellation signal without requiring an injected signal; a summing junction, the summing junction configured to receive and sum the cancellation signal and an incoming radio frequency signal from at least one of the uplink path and the downlink path. - View Dependent Claims (17, 18, 19, 20)
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Specification