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US 9,071,333 B2Granted
Device for canceling crosstalk, signal processing system and method for canceling crosstalk
AssigneeHuawei Technologies Co., Ltd.
InventorLiming Fang
Life of this patent
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Abstract
A method for canceling crosstalk, the method includes the steps of: filtering the signal corresponding to a far end crosstalk source in the frequency domain according to adaptive filter parameter; combining the received signal corresponding to a far end sending signal and the filtered signal in frequency domain corresponding to the far end crosstalk source. A device for canceling crosstalk and a signal processing system.
Claims9
A crosstalk canceling method, comprising:
- performing, at a first receiving end connected to a first transmitting end over a first line, frequency domain filtering on a plurality of signals corresponding to a plurality of far-end crosstalk sources according to a plurality of adaptive filtering parameters, wherein each signal corresponds to a different far-end crosstalk source and is related to a signal to be transmitted over a different line;
- synthesizing, at the first receiving end, a received signal corresponding to a far-end transmitting signal with the plurality of signals obtained by performing frequency domain filtering on the signals corresponding to the far-end crosstalk sources;
- receiving, at the first receiving end, information of the synthesized signals fed back from the far-end crosstalk sources, wherein the information comprises an error-related signal or a noise statistic related value;
- and
- adjusting, at the first receiving end, the plurality of adaptive filtering parameters corresponding to each different line used in the frequency domain filtering according to the information.
2 more elements
A crosstalk canceling device, which is implemented in a first receiving end connected to a first transmitting end over a first line, comprising a processing unit, wherein the processing unit comprises:
- a plurality of adaptive filters, wherein each of the plurality of adaptive filters is adapted to perform frequency domain filtering on a signal corresponding to a far-end crosstalk source according to an adaptive filtering parameter, wherein each signal corresponding to the far-end crosstalk source is related to a corresponding signal to be transmitted over a corresponding line;
- a signal synthesis unit, adapted to synthesize a received signal corresponding to a far-end transmitting signal and the signals filtered by the plurality of adaptive filters;
- a feedback reception unit, adapted to receive information of the synthesized signals fed back from the far-end crosstalk sources, wherein the information comprises an error-related signal or a noise statistic related value;
- and
- an adjusting unit, adapted to adjust the filtering parameter of each line according to the information and to send the adjusted filtering parameters to the plurality of adaptive filters and/or a second set of filters.
2 more elements
A signal processing system, comprising a time-frequency conversion unit and a crosstalk canceling device, wherein:
- the time-frequency conversion unit is adapted to convert signals corresponding to far-end crosstalk sources and a received signal corresponding to a far-end transmitting signal from time domain signals into frequency domain signals and to output the converted signals to the crosstalk canceling device;
- the crosstalk canceling device comprises a processing unit, which comprises a plurality of adaptive filters, a signal synthesis unit, a feedback reception unit, and an adjusting unit;
- each of the plurality of adaptive filters is adapted to perform frequency domain filtering on a signal obtained by converting a signal corresponding to a far-end crosstalk source via the time-frequency conversion unit according to adaptive filtering parameters, wherein each signal corresponding to a far-end crosstalk source is related to a signal to be transmitted over a corresponding line;
- the signal synthesis unit is adapted to synthesize a signal obtained by converting the received signal corresponding to the far-end transmitting signal via the time-frequency conversion unit and the signals filtered by the plurality of adaptive filters;
- a feedback reception unit, adapted to receive information of the synthesized signals fed back from the far-end crosstalk sources, wherein the information comprises an error-related signal or a noise statistic related value;
- and
- an adjusting unit, adapted to adjust the filtering parameter of each corresponding line according to the information and to send the adjusted filtering parameters to the plurality of adaptive filters and/or a second set of filters.
4 more elements
Dependencies are inferred from the claim text.