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. 16, 2009
Filed:
Apr. 17, 2003
Sung-hoon Kim, Daejeon, KR;
Yong-hun Sim, Seoul, KR;
Seung-won Kim, Daejeon, KR;
Chieteuk Ahn, Daejeon, KR;
Dae-jin Kim, Gwangju, KR;
Sung-Hoon Kim, Daejeon, KR;
Yong-Hun Sim, Seoul, KR;
Seung-Won Kim, Daejeon, KR;
Chieteuk Ahn, Daejeon, KR;
Dae-Jin Kim, Gwangju, KR;
Abstract
In a channel equalizer applicable to a digital television receiver, a forward filter and a backward filter perform filtering to an input signal and a predetermined signal. A Viterbi decoder corrects errors during a transmission procedure in a blind mode. A training symbol storing block stores training symbols. An output signal of the Viterbi decoder and symbols are provided to the backward filter in accordance with a blind mode or a training mode. A Kalman gain is calculated in a Kalman gain calculating block and an error signal is calculated by comparing an equalized signal, symbols, and the output signal of the Viterbi decoder with one another. A tap coefficient is updated by using the calculated error signal and the Kalman gain.