Method and apparatus for single end loop testing for DSL...

Details Method and apparatus for single end loop testing for DSL... Method and apparatus for single end loop testing for DSL...

2005-01-14

2008-12-02

Tran, Quoc D (Department: 2614)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of data transmission

C379S001030, C379S029010

Reexamination Certificate

active

07460649

ABSTRACT:
A method and apparatus for single end loop testing for DSL provisioning and maintenance provides testing of the DSL loop using digital techniques including frequency compensation, matched filtering and median filtering, to remove strong background and enhance desired signal for peak detection. The SELT system allows DSL providers to extract loop information from reflective measurements at the central office (CO) so as to determine loop capability of supporting different DSL services. The method and apparatus acquires the desired signal (the far-end echo) which is submerged in the correlated background noise (the near-end echo) by providing a process for detecting loop length and termination types with high accuracy for loops up to 12 kft for 24 AWG and up to 9 kft for 26 AWG by exploiting several digital signal processing techniques including frequency.

REFERENCES:
patent: 4105995 (1978-08-01), Bothof
patent: 4870675 (1989-09-01), Fuller et al.
patent: 5881130 (1999-03-01), Zhang
patent: 6177801 (2001-01-01), Chong
patent: 6266395 (2001-07-01), Liu et al.
patent: 6538451 (2003-03-01), Galli et al.
patent: 6606372 (2003-08-01), Yi et al.
patent: 6668041 (2003-12-01), Kamali et al.
patent: 6819744 (2004-11-01), Banwell et al.
patent: 6842012 (2005-01-01), Belge et al.
patent: 6865221 (2005-03-01), Belge
patent: 2002/0146095 (2002-10-01), Peoples
patent: 2004/0062361 (2004-04-01), Kamali et al.
Galli, Stefano et al.; “Loop Makeup Identification Via Single Ended Testing: Beyond Mere Loop Qualification”IEEE Journal on Selected Areas in Communications, vol. 20, No. 5, Jun. 2002, pp. 923-935.
Melsa, Peter J.W. et al.; “Texas Instruments: Single-Ended Loop Testing (SELT) Expectations and Realities”SPAYO11A, Mar. 2003, White paper, pp. 1-18.

Affiliated with

Also associated with

Rating

Method and apparatus for single end loop testing for DSL... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for single end loop testing for DSL..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for single end loop testing for DSL... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4020718