Method and System for Crosstalk Cancellation
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Accused Products
Abstract
Signals propagating in one communication channel can generate crosstalk interference in another communication channel. A crosstalk cancellation device can process the signals causing the crosstalk interference and generate a crosstalk cancellation signal that can compensate for the crosstalk when applied to the channel receiving crosstalk interference. The crosstalk cancellation device can include a model of the crosstalk effect that generates a signal emulating the actual crosstalk both in form an in timing. The crosstalk cancellation device can include a controller that monitors crosstalk-compensated communication signals and adjusts the model to enhance crosstalk cancellation performance. The crosstalk cancellation device can have a mode of self configuration or calibration in which defined test signals can be transmitted on the crosstalk-generating channel and the crosstalk-receiving channel.
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Citations
63 Claims
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1-43. -43. (canceled)
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44. A method for canceling crosstalk an aggressor signal applies to a victim signal, comprising:
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obtaining a sample of the aggressor signal; processing the sample with a circuit that comprises a crosstalk model to produce a crosstalk cancellation signal that is temporally aligned to the crosstalk; and applying the temporally aligned crosstalk cancellation signal to the victim signal. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51)
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52. A method for reducing interference on a first signal that communicates information, comprising the steps of:
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tapping off a portion of a second signal imposing the interference on the first signal; feeding the tapped off portion of the second signal to a circuit that emulates the imposed interference; shifting the emulated interference in time to provide a time match between the emulated interference and the imposed interference; and reducing the imposed interference in response to applying the shifted emulated interference to the first signal. - View Dependent Claims (53, 54, 55, 56, 57)
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58. A method for improving a first communication signal comprising interference due to a transfer of energy from a second communication signal, comprising the steps of:
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providing a first signal in response to sampling the second communication signal; generating a second signal in response to processing the first signal with an integrated circuit that models the transfer of energy; synchronizing the second signal to the interference; and applying the synchronized second signal to the first communication signal to cancel a substantial portion of the interference. - View Dependent Claims (59, 60, 61, 62, 63)
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Specification