Method and System for Automatic Control in an Interference Cancellation Device
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Abstract
Signals propagating on an aggressor communication channel can cause detrimental interference in a victim communication channel. A signal processing circuit can generate an interference cancellation signal that, when applied to the victim communication channel, cancels the detrimental interference. The signal processing circuit can dynamically adjust or update two or more aspects of the interference cancellation signal, such as an amplitude or gain parameter and a phase or delay parameter. Via the dynamic adjustments, the signal processing circuit can adapt to changing conditions, thereby maintaining an acceptable level of interference cancellation in a fluctuating operating environment. A control circuit that implements the parametric adjustments can have at least two modes of operation, one for adjusting the amplitude parameter and one for adjusting the phase parameter. The modes can be selectable or can be intermittently available, for example.
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Citations
51 Claims
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1-25. -25. (canceled)
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26. A method for reducing interference imposed by a first communication channel on a second communication channel via an interference effect, comprising the steps of:
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obtaining a first signal from the first communication channel; generating an estimate of the interference in response to processing the obtained first signal with a model of the interference effect; reducing the interference in response to applying the estimate to the second communication channel; obtaining a second signal from the second communication channel; refining the model in response to processing the obtained second signal with a circuit; placing the circuit in a power-savings mode in response to an occurrence of a trigger event; and suspending refining of the model while the circuit is in the power-savings mode. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method for reducing interference that a first communication signal imposes on a second communication signal via an effect, comprising the steps of:
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obtaining a sample of the first communication signal; producing an interference compensation signal in response to processing the obtained sample with a model of the effect; reducing the interference in response to applying the interference compensation signal to the second communication signal; refining the model in response to processing a sample of the second communication signal with a circuit that comprises a first electrical component and a second electrical component; removing power from the first electrical component in response to an event occurrence; and operating the circuit with power removed from the first electrical component while power feeds the second electrical component. - View Dependent Claims (42, 43, 44, 45, 46, 47)
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48. A method for reducing interference imposed on a first communication signal by a second communication signal, comprising the steps of:
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obtaining a sample of the second communication signal; generating a signal in response to processing the sample using a signal processing parameter; canceling the interference in response to applying the signal to the first communication signal; refining interference cancellation in response to adjusting the signal processing parameter with a circuit; and in response to determining that a trigger event has occurred, reducing power to selected elements of the circuit while maintaining power to other elements of the circuit. - View Dependent Claims (49, 50, 51)
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Specification