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    • 40. 发明公开
    • 계층 변조 신호를 위한 등화기
    • 均匀调制信号的均衡器
    • KR1020130088638A
    • 2013-08-08
    • KR1020120010009
    • 2012-01-31
    • 한국전자통신연구원
    • 임형수김흥묵
    • H04N7/015
    • H04L25/03
    • PURPOSE: An equalizer for a hierarchically modulated signal is provided to improve the performance of an apparatus receiving the hierarchically modulated signal, by reflecting the characteristics of the hierarchically modulated signal. CONSTITUTION: A forward filter (1210) generates a forward filter output signal by filtering a hierarchically modulated signal. A hierarchal symbol detector (1220) detects a first hierarchical symbol value from a first hierarchical symbol detector input signal. A feedback filter (1230) generates a feedback filter output signal by filtering a value obtained by adding a second hierarchical symbol value to the first hierarchical symbol value. The first hierarchical symbol detector input signal is the sum of the forward filter output signal and the feedback filter output signal. Each tap coefficient of the forward filter and the feedback filter is updated on the basis of an error signal acquired by comparing the value of the first hierarchical symbol detector input signal with the value obtained by adding the first hierarchical symbol value and the second hierarchical symbol value. [Reference numerals] (1210) Forward filter; (1220) First hierarchical symbol detector; (1230) Feedback filter; (AA) Decoder output signal; (BB) Lamp output signal; (CC) First hierarchical symbol; (DD) Signals; (EE) Second hierarchical symbol
    • 目的:通过反映分层调制信号的特性,提供了一种用于分层调制信号的均衡器,以提高接收分层调制信号的装置的性能。 构成:正向滤波器(1210)通过对分层调制信号进行滤波来产生正向滤波器输出信号。 层级符号检测器(1220)从第一分层符号检测器输入信号检测第一分层符号值。 反馈滤波器(1230)通过对通过将第二分层符号值添加到第一分层符号值而获得的值来生成反馈滤波器输出信号。 第一层次符号检测器输入信号是正向滤波器输出信号和反馈滤波器输出信号的和。 基于通过将第一分层符号检测器输入信号的值与通过将第一分层符号值和第二分层符号值相加获得的值而获得的误差信号来更新正向滤波器和反馈滤波器的每个抽头系数 。 (附图标记)(1210)正向滤波器; (1220)第一分层符号检测器; (1230)反馈滤波器; (AA)解码器输出信号; (BB)灯输出信号; (CC)第一层次符号; (DD)信号; (EE)第二层次符号