Method and system for antenna interference cancellation
4 Assignments
0 Petitions
Accused Products
Abstract
A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating an estimate of the interference signal and subtracting the estimate from the interference signal. The cancellation device can generate the estimate based on sampling signals on an antenna that generates the interference or on an antenna that receives the interference. The cancellation device can comprise a model of the crosstalk effect. Transmitting test signals on the communication system can define or refine the model.
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Citations
45 Claims
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1-20. -20. (canceled)
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21. A method for suppressing interference that a first antenna imposes on a second antenna, wherein the first antenna and the second antenna are disposed at a wireless communication device, the method comprising the steps of:
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producing a signal in response to processing a sample of the imposed interference; and reducing the imposed interference in response to applying the produced signal to a feed line for the second antenna. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A method, for addressing interference performance of a wireless communication device that comprises a first antenna and a second antenna, the method comprising the steps of:
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sampling interference on the first antenna resulting from transmitting communications over the second antenna; generating an interference cancellation signal based on the sampled interference; and suppressing the interference on the first antenna in response to applying the interference cancellation signal to a feed line of the first antenna. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A system, for managing interference in a wireless communication device that comprises a first antenna and a second antenna and that is operable to transmit wireless information in response to operating the first antenna and the second antenna, the system comprising signal processing circuitry operable to:
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cancel first interference on the first antenna according to a first signal propagating on the second antenna; and cancel second interference on the second antenna according to a second signal propagating on the first antenna. - View Dependent Claims (35, 36, 37)
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38. A system for suppressing interference between a first antenna and a second antenna, comprising
a first circuit comprising: -
a first input port that is operable to receive first signals from a first signal path leading to the first antenna; first signal processing circuitry that is operable to produce a first interference cancellation signal in response to processing the received first signals; and a first output port that is operable to output the first interference cancellation signal for delivery to a second signal path leading to the second antenna; and a second circuit comprising; a second input port that is operable to receive second signals from the second signal path; second signal processing circuitry that is operable to produce a second interference cancellation signal in response to processing the received second signals; and a second output port that is operable to output the second interference cancellation signal for delivery to the first signal path. - View Dependent Claims (39, 40, 41, 42)
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43. A pair of modules for suppressing interference on a system of two antennas, each of the modules comprising:
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an inlet for receiving a portion of a signal intended for propagation on one of the two antennas; signal processing circuitry for processing the received portion of the signal to produce an interference cancellation signal; and an outlet for outputting the interference cancellation signal for application to a feed line of the other one of the two antennas. - View Dependent Claims (44, 45)
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Specification