Title:
METHOD, APPARATUS AND SYSTEM FOR CROSSTALK TESTING OF MULTI-USER COMMUNICATION LINE
Document Type and Number:
WIPO Patent Application WO/2007/031025
Kind Code:
A1
Abstract:
A method, apparatus and system for crosstalk testing of multi-user communication line,
which mainly include: add predetermined orthogonal spectrum spreading code
to each line of the transmitter, then perform crosstalk testing on xDSL line based
on the signal vector received at the receiver in order to recognize effectively the
crosstalk source, crosstalk amplitude and phase, etc. The present invention can
perform crosstalk value testing between the lines in real time without effecting the
transmission performance of other lines. Moreover, the testing result can reflect
how many lines are effecting the tested line greatly and the extent of the effect.
The present invention provides the data basis for dynamic spectrum management
and DSLAM system performance optimize.
Inventors:
SHI QINGQUAN (CN)
Application Number:
PCT/CN2006/002390
Publication Date:
March 22, 2007
Filing Date:
September 14, 2006
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
SHI QINGQUAN (CN)
SHI QINGQUAN (CN)
International Classes:
H04B3/32; H04M11/06; H04J13/00; H04J13/18; H04L25/00; H04M3/00
Domestic Patent References:
| WO2000059125A1 | 2000-10-05 |
Foreign References:
| CN1468011A | 2004-01-14 | |||
| CN1529438A | 2004-09-15 | |||
| US6061407A | 2000-05-09 | |||
| US6744813B1 | 2004-06-01 | |||
| US6870901B1 | 2005-03-22 |
Other References:
"Real-time FEXT crosstalk identification in ADSL systems IEEE", IEEE, 4 September 2003 (2003-09-04), pages 61 - 66
See also references of EP 1940140A4
See also references of EP 1940140A4
Attorney, Agent or Firm:
BEIJING CATALY IP ATTORNEY AT LAW (Liming Room 902, Sidaokou Road 11, Haidian District Beijing 1, CN)
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