公开(公告)号：KR1020040025009A

公开(公告)日：2004-03-24

申请号：KR1020020056793

申请日：2002-09-18

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  오영호 ,  박성우

IPC: H04N7/015

CPC classification number: H04L25/03267 ,  H04L1/0047 ,  H04L2025/03458 ,  H04L2025/03636 ,  H04L2201/06 ,  H04N5/4401

Abstract: PURPOSE: A grid type channel equalizer in connection with a viterbi decoder is provided to connect with a viterbi decoder, and to couple with an LMS decision feedback channel equalizer, then to automatically select an equalizer having a small output error, thereby improving channel equalization performance in a blind mode and removing signal distortions. CONSTITUTION: An LMS decision feedback channel equalizer(321) uses LMS algorithm by updating equalizer tap coefficients. A grid type decision feedback channel equalizer(322) uses a grid type for channel equalization. An error measurer(323) using segment synchronization measures errors of each equalizer output by using ATSC segment synchronization for output errors of the LMS decision feedback channel equalizer(321) and the grid type decision feedback channel equalizer(322). An equalizer output selector(324) automatically selects an equalizer having a small error based on measured results of the error measurer(323). A viterbi decoder(325) corrects a transmission error in a blind mode.

Abstract translation: 目的：提供与维特比解码器相关的网格型信道均衡器与维特比解码器连接，并与LMS判决反馈信道均衡器耦合，然后自动选择具有小输出误差的均衡器，从而提高信道均衡性能 处于盲模式并消除信号失真。 构成：LMS决策反馈信道均衡器（321）通过更新均衡器抽头系数来使用LMS算法。 网格型判决反馈信道均衡器（322）使用网格类型进行信道均衡。 使用段同步的误差测量器（323）通过对LMS判决反馈信道均衡器（321）和网格类型判定反馈信道均衡器（322）的输出错误使用ATSC段同步来测量每个均衡器输出的误差。 均衡器输出选择器（324）基于误差测量器的测量结果（323）自动选择具有小误差的均衡器。 维特比解码器（325）在盲模式下校正传输错误。

公开(公告)号：KR1020030097192A

公开(公告)日：2003-12-31

申请号：KR1020020034453

申请日：2002-06-20

Applicant: 대한민국(전남대학교총장)

Inventor： 김대진 ,  오영호 ,  박성우 ,  이경원

IPC: H04N7/015

CPC classification number: H04L25/03267 ,  H04L1/006 ,  H04L25/03019 ,  H04N5/4401

Abstract: PURPOSE: A fast recursive least square-decision feedback equalizer interworking with a least mean square-decision feedback equalizer is provided to realize a channel equalizer interworking a restarting fast recursive least square-decision feedback equalizer with a least mean square-decision feedback equalizer. CONSTITUTION: An LMS(least mean square) equalizer filter(502) receives and filters external input signals, decided data, and an error calculated value by using updated coefficients and segment synchronization. A restart fast kalman tap coefficient updating unit(501) updates coefficients. A trellis decoder(504) reduces a decision error from signals output from the LMS equalizer filter. An error calculating unit(505) calculates the error value by using each output value of the LMS equalizer filter and segment synchronization.

Abstract translation: 目的：提供与最小均方决策反馈均衡器相互作用的快速递归最小二乘决策反馈均衡器，以实现信道均衡器与最小均方决策反馈均衡器重新启动快速递归最小二乘判决反馈均衡器的互通。 构成：LMS（最小均方）均衡器滤波器（502）通过使用更新的系数和段同步来接收和滤除外部输入信号，确定的数据和误差计算值。 重启快速卡尔曼抽头系数更新单元（501）更新系数。 网格解码器（504）从LMS均衡器滤波器输出的信号中减少判定误差。 误差计算单元（505）通过使用LMS均衡器滤波器的每个输出值和段同步来计算误差值。