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    • 9. 发明公开
    • 통신 시스템에서 저밀도 패리티 검사 코드의 복호 장치 및방법
    • 用于解码低密度奇偶校验码的数据通信系统中的前向纠错的设备和方法
    • KR1020040101743A
    • 2004-12-03
    • KR1020030033456
    • 2003-05-26
    • 학교법인연세대학교삼성전자주식회사
    • 서승범송홍엽신민호김준성
    • H03M13/11
    • H03M13/3927H03M13/1117H03M13/112H03M13/1131H03M13/6505H03M13/658H03M13/6588
    • PURPOSE: An apparatus and a method for decoding a low-density parity check code to perform a forward error correction process in a digital communication system are provided to prevent the deterioration of performance in a process for decoding the low-density parity check code by using only a simplified circuit. CONSTITUTION: A syndrome calculator(501,502) is used for calculating syndrome values by using parity values of encoded symbols. A comparison/selection unit(503) outputs a channel reliability value having the least log-likelihood ratio by using values according to transmission channel reliability of the encoded symbols and the syndrome values. A switch(504) is used for switching an output of the comparison/selection unit to one of three different output terminals on the basis of a switching control signal. A plurality of multiplication units(505-507) are connected to three output terminals of the switch. A control unit(510) outputs the switching control signal in order to connect selectively the output of the comparison/selection unit to the first, the second, and the third multipliers.
    • 目的:提供一种用于解码低密度奇偶校验码以在数字通信系统中执行前向纠错处理的装置和方法,以防止在通过使用低密度奇偶校验码进行解码的处理中的性能下降 只有一个简化的电路。 构成:校正子计算器(501,502)用于通过使用编码符号的奇偶校验值来计算校正子值。 比较/选择单元(503)通过使用根据编码符号的传输信道可靠性和校正子值的值来输出具有最小对数似然比的信道可靠性值。 开关(504)用于根据开关控制信号将比较/选择单元的输出切换到三个不同的输出端之一。 多个乘法单元(505-507)连接到开关的三个输出端子。 控制单元(510)输出切换控制信号,以便将比较/选择单元的输出选择性地连接到第一乘法器,第二乘法器和第三乘法器。