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:
Nov. 09, 2004
Filed:
Jun. 23, 1998
Dong-Chang Shiue, Carmel, IN (US);
Kumar Ramaswamy, Indianapolis, IN (US);
Paul Gothard Knutson, Indianapolis, IN (US);
Thomson Licensing S.A., Boulogne-Billancourt, FR;
Abstract
An adaptive channel equalizer ( ) for processing a demodulated VSB signal containing terrestrial broadcast high definition television information includes an adaptive feed forward filter (FFF ) and an adaptive decision feedback filter (DFF ). The equalizer is preceded by a demodulator/carrier recovery network ( ) and does not include a carrier recovery function in the equalizer control loop. The equalizer FFF and DFF elements operate adaptively in blind, training, and decision-directed modes. A direct connection provided from the equalizer output to the DFF facilitates coarse signal acquisition and equalization during the blind operating mode.