Signal processing method for bound digital subscriber line channels, and device and system adopting same

A digital subscriber line and signal processing device technology, applied in wired transmission systems, transmission systems, line transmission components, etc., can solve problems such as unstable performance, signal interference, line disconnection, etc., to achieve far-end crosstalk, The effect of ensuring communication stability

Inactive Publication Date: 2011-06-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of electromagnetic induction, far-end crosstalk will occur between multiple channels connected by xDSL, that is, after the signal sent by the near-end is attenuated by the circuit, it will interfere with the signal of the adjacent channel at the far end.
Far-end crosstalk can cause problems such as line rate reduction, unstable performance, and disconnected lines

Method used

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  • Signal processing method for bound digital subscriber line channels, and device and system adopting same
  • Signal processing method for bound digital subscriber line channels, and device and system adopting same
  • Signal processing method for bound digital subscriber line channels, and device and system adopting same

Examples

Experimental program
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Embodiment 1

[0043] An embodiment of the present invention provides a signal processing method for binding digital subscriber line channels, such as figure 2 As shown, the method includes the following steps:

[0044] 201. Send pilot sequences to a receiving end through at least two bonded channels.

[0045] The pilot sequences should be sent simultaneously from each channel being bonded.

[0046] 202. Receive the interception error segment returned by the receiving end.

[0047]The pilot sequence transmitted through the channel generates errors due to far-end crosstalk. After the receiving end receives the pilot sequence sent by the sending end, the error caused by the far-end crosstalk of the pilot sequence is composed of an interception error, and then the receiving end slices the interception error to obtain the interception error fragmentation and returns it to sender.

[0048] 203. Re-aggregate the received truncation error fragments into truncation errors.

[0049] 204. Calcul...

Embodiment 2

[0054] The embodiment of the present invention provides a processing method for binding digital subscriber line channels, such as Figure 4 As shown, the method includes the following steps:

[0055] 401. Send a pilot sequence to a receiving end through at least two bonded channels.

[0056] The pilot sequences should be sent simultaneously from each channel being bonded.

[0057] 402. Receive the interception error segment returned by the receiving end.

[0058] The pilot sequence transmitted through the channel generates errors due to far-end crosstalk. After the receiving end receives the pilot sequence transmitted by the transmitting end through the channel, the error caused by the far-end crosstalk of the pilot sequence is composed of the interception error and the interception error is divided into interception error fragments, and then the interception error fragmentation is divided into Return to the sender. The receiving end performs fragmentation operations on th...

Embodiment 3

[0070] An embodiment of the present invention provides a signal processing device for binding digital subscriber line channels, such as Figure 5 shown. The apparatus includes: a sending unit 51 , a receiving unit 52 , an aggregation unit 53 , and a precoding calculation unit 54 .

[0071] The sending unit 51 is configured to respectively send the pilot sequence to the receiving end through the at least two bonded channels. The receiving unit 52 is configured to receive the truncation error segment returned by the receiving end. The aggregation unit 53 re-aggregates the received truncation error fragments into truncation errors. The precoding calculation unit 54 is configured to calculate a precoding coefficient according to the pilot sequence and the re-aggregated truncation error. Before the signal is sent to the at least two bonded channels, the transmitting end performs precoding processing on the signal by using the precoding coefficient.

[0072] Since the truncation...

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PUM

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Abstract

The invention discloses a signal processing method for bound digital subscriber line channels, and a device and a system both adopting same, relating to the communication field. The signal processing method provided by the embodiment of the invention can lessen the FEXT (Far End Crosstalk) among the bound channels, and comprises the following steps: sending a pilot frequency sequence to a receiving end through the bound channels; receiving clipped error fragments from the receiving end through the bound channels; obtaining clipped error sample by the receiving end according to the error of received signals, and obtaining clipped error fragments through fragmentizing a clipped error; integrating the received clipped error fragments into the clipped error; and calculating a pre-coding coefficient (used for pre-coding signals before sending) according to the pilot frequency sequence and the integrated clipped error. The embodiment of the invention is applied to the digital communication system, and when the sending terminal transmits data to the receiving end through the bound channels, the FEXT among the channels is eliminated.

Description

technical field [0001] The present invention relates to the communication field, in particular to a processing method, device and system for reducing crosstalk between bonded channels. Background technique [0002] Unshielded Twisted Pair (UTP, Unshielded Twisted Pair) is often used for Ethernet data transmission. Technologies based on UTP signal transmission include: ADSL (Asymmetric Digital Subscriber Line), VDSL (Very High Speed ​​Digital Subscriber line), HDSL (High bit Rate Digital Subscriber Line), etc., collectively referred to as xDSL technology. Due to the influence of electromagnetic induction, far-end crosstalk will occur between the multiple channels accessed by xDSL, that is, the signal sent from the near end will interfere with the signal of the adjacent channel at the far end after being attenuated by the circuit. Far-end crosstalk can cause line rate drops, erratic performance, disconnected lines, and more. [0003] As user bandwidth requirements increase d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/32
CPCH04M11/062H04B3/32H04B3/464
Inventor 吕捷方李明
Owner HUAWEI TECH CO LTD
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