Title:
METHOD AND APPARATUS FOR UPDATING EQUALIZATION COEFFICIENTS OF ADAPTIVE PRE-EQUALIZERS
Document Type and Number:
WIPO Patent Application WO/2013/032632
Kind Code:
A3
Abstract:
A method and apparatus for updating equalization coefficients of an adaptive pre-equalizer of a network element are provided. The method includes monitoring a communications channel to measure distortion of a communications signal received from the network element and detecting whether a transient impairment is present in the communication signal. When a transient impairment is not detected to be present, a pre-equalization coefficient update is transmitted to the network element. However, when a transient impairment is detected to be present, at least selected ones of the pre-equalization coefficients are scaled before the update is transmitted to the network element or the update is withheld from being transmitted to the network element. An apparatus is also disclosed.
Inventors:
COOPER MICHAEL J (US)
MOORE CHARLES S (US)
MORAN JOHN L (US)
MORRISSETTE MARC L (US)
THOMPSON ROBERT J (US)
MOORE CHARLES S (US)
MORAN JOHN L (US)
MORRISSETTE MARC L (US)
THOMPSON ROBERT J (US)
Application Number:
PCT/US2012/049685
Publication Date:
April 25, 2013
Filing Date:
August 06, 2012
Export Citation:
Assignee:
GEN INSTRUMENT CORP (US)
COOPER MICHAEL J (US)
MOORE CHARLES S (US)
MORAN JOHN L (US)
MORRISSETTE MARC L (US)
THOMPSON ROBERT J (US)
COOPER MICHAEL J (US)
MOORE CHARLES S (US)
MORAN JOHN L (US)
MORRISSETTE MARC L (US)
THOMPSON ROBERT J (US)
International Classes:
H04L25/03
Foreign References:
| US5692010A | 1997-11-25 | |||
| EP1956782A1 | 2008-08-13 | |||
| US5867539A | 1999-02-02 | |||
| US20090252234A1 | 2009-10-08 |
Other References:
MORISHITA Y ET AL: "An lms adaptive equalizer using threshold in impulse noise environments", TELECOMMUNICATIONS, 2003. ICT 2003. 10TH INTERNATIONAL CONFERENCE ON FEB. 23 - MAR. 1, 2003, PISCATAWAY, NJ, USA,IEEE, vol. 1, 23 February 2003 (2003-02-23), pages 578 - 582, XP010637867, ISBN: 978-0-7803-7661-8, DOI: 10.1109/ICTEL.2003.1191474
Attorney, Agent or Firm:
WIENER, Stewart M. et al. (Libertyville, Illinois, US)
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