Method and apparatus for updating equalization coefficients of adaptive pre-equalizers

Patent metadata

Field	Value
Publication number	US-8937992-B2
Application number	US-201113221531-A
Country	US
Kind code	B2
Filing date	Aug 30, 2011
Priority date	Aug 30, 2011
Publication date	Jan 20, 2015
Grant date	Jan 20, 2015

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.

First claim

We claim:

1. A method of updating equalization coefficients of an adaptive pre-equalizer of a network element, comprising the steps of:
monitoring a communications channel to measure distortion of a communications signal received from the network element;
detecting, during said monitoring step, whether a transient impairment is present in the communication signal;
determining, after said monitoring step, pre-equalization coefficients based on the distortion measured during sai…

Assignees

• Cooper Michael J
• Moore Charles S
• Moran John L
• Morrissette Marc L
• Thompson Robert J
• Gen Instrument Corp

Inventors

• Cooper Michael J
• Moore Charles S
• Moran John L
• Morrissette Marc L
• Thompson Robert J

Classifications

• H04L25/03006 Primary

  Electricity · mapped topic

• H04L25/03885

  Electricity · mapped topic