公开(公告)号：CA2482815A1

公开(公告)日：2003-10-30

申请号：CA2482815

申请日：2003-04-17

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： SIM YONG-HUN ,  KIM SUNG-HOON ,  KIM DAE-JIN ,  KIM SEUNG-WON ,  AHN CHIETEUK

IPC: H04N7/015 ,  H04L25/03 ,  H04N5/21 ,  H04N5/44 ,  H04N7/12

Abstract: In a channel equalizer applicable to a digital television receiver, a forwar d filter and a backward filter perform filtering to an input signal and a predetermined signal. A Viterbi decoder corrects errors during a transmissio n 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 outp ut signal of the Viterbi decoder with one another. A tap coefficient is updated by using the calculated error signal and the Kalman gain.

公开(公告)号：AU2003225385A1

公开(公告)日：2003-11-03

申请号：AU2003225385

申请日：2003-04-17

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： SIM YONG-HUN ,  KIM SEUNG-WON ,  AHN CHIETEUK ,  KIM DAE-JIN ,  KIM SUNG-HOON

IPC: H04N7/015 ,  H04L25/03 ,  H04N5/21 ,  H04N5/44 ,  H04N7/12

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.

公开(公告)号：CA2482815C

公开(公告)日：2008-07-08

申请号：CA2482815

申请日：2003-04-17

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM DAE-JIN ,  KIM SEUNG-WON ,  AHN CHIETEUK ,  KIM SUNG-HOON ,  SIM YONG-HUN

IPC: H04N7/015 ,  H04L25/03 ,  H04N5/21 ,  H04N5/44 ,  H04N7/12

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.