The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2002
Filed:
Sep. 08, 1998
Xuming Zhang, Mission Viejo, CA (US);
Conexant Systems, Inc., Newport Beach, CA (US);
Abstract
An improved two-point equalizer training technique for use with V.90 modem systems utilizes a number of scaling parameters to enable the compensation of robbed bit signaling (RBS) effects in a manner that is decoupled from the compensation of analog impairments in the data communication channel. The preferred technique employs six scaling parameters corresponding to the six RBS phases typically associated with practical V.90 systems. One of the scaling parameters is fixed at a value of one to simplify the computational load associated with the adaptive training algorithms. The decision error is utilized to adaptively adjust the equalizer filter taps and the scaling parameters. The techniques of the present invention may be used to initially train the equalizer resident at the analog client modem and/or to initially train the echo canceler resident at the digital server modem.