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:
Apr. 08, 2014
Filed:
Oct. 14, 2011
Nobukazu Koizumi, Kawasaki, JP;
Kazuhiko Hatae, Kawasaki, JP;
Noriyasu Nakayama, Kawasaki, JP;
Koji Nakamuta, Kawasaki, JP;
Hisao Nakashima, Kawasaki, JP;
Kosuke Komaki, Kawasaki, JP;
Nobukazu Koizumi, Kawasaki, JP;
Kazuhiko Hatae, Kawasaki, JP;
Noriyasu Nakayama, Kawasaki, JP;
Koji Nakamuta, Kawasaki, JP;
Hisao Nakashima, Kawasaki, JP;
Kosuke Komaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An adaptive equalizer includes a finite impulse response filter with a predetermined number of taps; and a tap coefficient adaptive controller having a register to hold tap coefficients for the filter, a weighted center calculator to calculate a weighted center of the tap coefficients, and a tap coefficient shifter to shift the tap coefficients based on a calculation result of the weighted center. During an initial training period, the tap coefficient shifter shifts the tap coefficients on a symbol data basis such that a difference between the calculated weighted center of the tap coefficients and a tap center defined by the number of taps is minimized.