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    KALMAN-VITERBI JOINT CHANNEL EQUALIZER
    6.
    发明专利
    KALMAN-VITERBI JOINT CHANNEL EQUALIZER 未知

    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.

    OPTIMAL ENCODER AND ENCODING METHOD FOR DUAL STREAM SYSTEM
    8.
    发明专利
    OPTIMAL ENCODER AND ENCODING METHOD FOR DUAL STREAM SYSTEM 未知

    公开(公告)号：CA2616067A1

    公开(公告)日：2007-01-25

    申请号：CA2616067

    申请日：2006-07-19

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM CHANG-JOONG ,  KIM SEUNG-WON ,  LEE HO-KYOUNG ,  AHN CHIETEUK ,  LEE SOO-IN ,  KIM SUNG-HOON ,  LEE JAE-YOUNG

    IPC: H03M13/23

    Abstract: Provided are a method of estimating an encoder for dual stream transmission, and an encoder using the same. The method includes the steps of : a) setting up the number of memories required for an encoder, a free distance condition for robust data, and a free distance condition for mixed stream of robust data and normal data; b) obtaining 1/2 rate encoder combinations that sustain backward compatibility with a typical trellis encoder; c) obtaining encoder combinations H that satisfy the free distance condition for the robust data and the free distance condition for the mixed stream from the 1/2 rate encoder combinations; d) obtaining relations between memories and input/output signals, which satisfy the encoder combinations H; and e) configuring an encoder according to the obtained relation between the memories and the input/output signals.

    OPTIMAL TCM CODEC SEARCH METHOD FOR DUAL STREAM SYSTEMS, AND ENCODER/DECODER USING THE SAME
    10.
    发明专利
    OPTIMAL TCM CODEC SEARCH METHOD FOR DUAL STREAM SYSTEMS, AND ENCODER/DECODER USING THE SAME 未知

    公开(公告)号：CA2614866C

    公开(公告)日：2014-02-18

    申请号：CA2614866

    申请日：2006-07-11

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SUNG-HOON ,  LEE JAE-YOUNG ,  KIM SEUNG-WON ,  LEE SOO-IN ,  AHN CHIETEUK ,  LEE HO-KYOUNG ,  KIM CHANG-JOONG

    IPC: H04N7/66 ,  H03M13/25

    Abstract: Provided is a method for searching for an optimal coder suitable to a dual stream transmission method of a DTV transceiving apparatus, and an encoder and a decoder employing the optimal coder searching method. The optimal coder searching method includes the steps of: a) determining a mixed pattern of normal stream and robust stream; b) determining a trellis structure of the robust stream which is applied to the mixed pattern based on how coders are connected; c) forming a dual stream trellis by mixing a trellis of the normal stream, which is a normal stream trellis, and a trellis of the robust stream, which is a robust stream trellis; d) computing a free distance at departing points of the dual stream trellis structure based on a dual stream free distance computation termination condition; and e) determining the optimal coder based on the free distance.

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