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:
Aug. 20, 2013
Filed:
Jul. 23, 2008
Xingdong Dai, Whitehall, PA (US);
Dwight D. Daugherty, Ephrata, PA (US);
Max J. Olsen, Mertztown, PA (US);
Geoffrey Zhang, Allentown, PA (US);
Xingdong Dai, Whitehall, PA (US);
Dwight D. Daugherty, Ephrata, PA (US);
Max J. Olsen, Mertztown, PA (US);
Geoffrey Zhang, Allentown, PA (US);
Agere Systems LLC, Allentown, PA (US);
Abstract
Methods and apparatus are provided for joint adaptation of filter values in two communicating devices, such as a link partner and a link device. The disclosed joint adaptation process initially adapts the filter coefficient values in a first of the two communicating devices until a predefined stopping criteria is satisfied. Thereafter, the filter coefficient values in a second of the two communicating devices are adapted once the predefined stopping criteria for the first communicating device is satisfied. The filter coefficient values can comprise coefficient values of a multi-tap filter. The predefined stopping criteria may determine, for example, whether the first of the two communicating devices is overequalized. The filter coefficient values can be determined by including a contribution of only certain cursor tap values of the channel impulse response.