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:
Jan. 07, 2014
Filed:
Nov. 23, 2011
Eric Rolf Christensen, Tucson, AZ (US);
Ernest Stewart Gale, Tucson, AZ (US);
Robert Allen Hutchins, Tucson, AZ (US);
Sedat Oelcer, Kilchberg, CH;
Eric Rolf Christensen, Tucson, AZ (US);
Ernest Stewart Gale, Tucson, AZ (US);
Robert Allen Hutchins, Tucson, AZ (US);
Sedat Oelcer, Kilchberg, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix is disclosed. In one embodiment, such a method includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. These initial values may be used to produce a first waveform. The method then performs an operation on the first waveform to produce a second waveform comprising multiple lobes. The second waveform is then analyzed to determine one or more lobes of the second waveform that have the largest area. The method then fixes coefficients of one or more taps that are closest to the lobe or lobes having the largest area. A corresponding apparatus and computer program product are also disclosed.