US 9,756,178 B2Granted

Crosstalk estimation method, apparatus, and system

AssigneeHuawei Technologies Co., Ltd.

InventorsJianping Tu, Zhong Pan

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Abstract

A crosstalk processing method, an apparatus, and a system comprise a transceiver of a line that generates, respectively according to pilot sequences allocated by a vectoring control entity, pilot training signals that are within different spectral ranges and that satisfy a preset relationship with a pilot training signal of another line such that a receiver of the line can determine sample errors respectively according to the different pilot training signals. A vectoring control entity then determines crosstalk channel coefficients from the other line into an inband spectrum and an out-of-band spectrum of the line, and performs precoding processing on a to-be-sent data signal of the line to eliminate impact of crosstalk from the other line to the inband and out-of-band spectrums of the line.

Claims19

Dependent claims

A crosstalk estimation method, comprising:

receiving, by a transceiver at one end of a first line, a first pilot sequence allocated by a vectoring control entity in a digital subscriber line system;
generating, by the transceiver at the one end of the first line, a first pilot training signal and a third pilot training signal according to the first pilot sequence, wherein the first pilot training signal is a pilot training signal of the first line within an overlapping spectral range of the first line and a second line, wherein the third pilot training signal is a pilot training signal of the first line out of the overlapping spectral range of the first line and the second line, and wherein an out-of-band spectrum of the second line overlaps an inband spectrum of the first line;
sending, by the transceiver at the one end of the first line, the first pilot training signal and the third pilot training signal according to the first pilot sequence;
generating, by a transceiver at a peer end of the first line, error sample signals according to the first pilot training signal and the third pilot training signal;
and
sending, by the transceiver at the peer end of the first line, the error sample signals to the vectoring control entity to determine a first crosstalk channel coefficient from the second line into the first line.

3 more elements

A line apparatus, comprising:

a first transceiver configured to:
receive a first pilot sequence allocated by a vectoring control entity in a digital subscriber line system;
and send a first pilot training signal and a third pilot training signal according to the first pilot sequence, wherein the first pilot training signal is a pilot training signal of a first line within an overlapping spectral range of the first line and a second line, wherein the third pilot training signal is a pilot training signal of the first line out of the overlapping spectral range of the first line and the second line, and wherein an out-of-band spectrum of the second line overlaps an inband spectrum of the first line;
and
a second transceiver is configured to:
generate error sample signals according to the first pilot training signal and the third pilot training signal;
and
send the error sample signals to the vectoring control entity to determine a first crosstalk channel coefficient from the second line into the first line.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/412,678Filed 23 Jan 2017 · continuation
Priority: 24 Jul 2014
Published: US 2017/0134569 A111 May 2017
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.