Adaptive cancellation for wireless repeaters
First Claim
Patent Images
1. A repeater system comprising:
- a housing having a pair of substantially 180°
oppositely facing surfaces;
at least one donor antenna element for communicating with a base station and at least one null antenna element for communicating with a remote station, wherein said donor and null antenna elements are respectively mounted on said oppositely facing surfaces for radiating energy in opposite directions;
a radio frequency uplink path and a radio frequency downlink path coupled between said donor antenna and said null antenna; and
an adaptive cancellation circuit in at least one of said radio frequency uplink path and said radio frequency downlink path and mounted to said housing, which generates a cancellation signal, which when added to a radio frequency signal in either of said radio frequency uplink and radio frequency downlink paths, destructively interferes with any feedback signal present in said radio frequency signal.
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Abstract
A repeater system has at least one donor antenna element for communicating with a base station and at least one link antenna element for communicating with a remote station. A radio frequency uplink path and a radio frequency downlink path are coupled between the donor antenna and the null antenna. An adaptive cancellation circuit in each of the radio frequency uplink path and the radio frequency downlink path generates a cancellation signal, which when added to a radio frequency signal in either of the radio frequency uplink and radio frequency downlink paths, substantially cancels any feedback signal present in the radio frequency signal.
201 Citations
31 Claims
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1. A repeater system comprising:
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a housing having a pair of substantially 180°
oppositely facing surfaces;
at least one donor antenna element for communicating with a base station and at least one null antenna element for communicating with a remote station, wherein said donor and null antenna elements are respectively mounted on said oppositely facing surfaces for radiating energy in opposite directions;
a radio frequency uplink path and a radio frequency downlink path coupled between said donor antenna and said null antenna; and
an adaptive cancellation circuit in at least one of said radio frequency uplink path and said radio frequency downlink path and mounted to said housing, which generates a cancellation signal, which when added to a radio frequency signal in either of said radio frequency uplink and radio frequency downlink paths, destructively interferes with any feedback signal present in said radio frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of operating a repeater system having a housing with a pair of substantially 180°
- oppositely facing surfaces, at least one donor antenna element for communicating with a base station and at least one null antenna element for communicating with a remote station, and a radio frequency uplink path and a radio frequency downlink path coupled between said donor antenna and said null antenna, wherein said donor and null antenna elements are respectively mounted on said oppositely facing surfaces for radiating energy in opposite directions, said method comprising;
generating, within an electrical circuit mounted to said housing, a cancellation signal in at least one of said radio frequency uplink path and said radio frequency downlink path, which cancellation signal, when added to a radio frequency signal in either of said radio frequency uplink and radio frequency downlink paths, destructively interferes with any feedback signal present in said radio frequency signal. - View Dependent Claims (19, 20, 21, 22, 23, 24)
- oppositely facing surfaces, at least one donor antenna element for communicating with a base station and at least one null antenna element for communicating with a remote station, and a radio frequency uplink path and a radio frequency downlink path coupled between said donor antenna and said null antenna, wherein said donor and null antenna elements are respectively mounted on said oppositely facing surfaces for radiating energy in opposite directions, said method comprising;
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25. A repeater system comprising:
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a housing having a pair of substantially 180°
oppositely facing surfaces;
at least one donor antenna element for communicating with a base station and at least one null antenna element for communicating with a remote station, wherein said donor and null antenna elements are respectively mounted on said oppositely facing surfaces for radiating energy in opposite directions; and
an adaptive cancellation circuit mounted to said housing, and which generates a cancellation signal, which when added to a radio frequency signal from either of said donor antenna and said null antenna, destructively interferes with any feedback signal present in said radio frequency signal. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification