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    • 13. 发明公开
    • 비터비 복호기 및 그 복호 방법
    • VITERBI解码器及其解码方法
    • KR1020020049951A
    • 2002-06-26
    • KR1020000079279
    • 2000-12-20
    • 한화시스템 주식회사
    • 이병길김석중
    • H03M13/41
    • H03M13/41H03M13/6502
    • PURPOSE: A viterbi decoder and a decoding method thereof are provided, which are not affected by a length of a constraint length while constituting a hardware, and simplifies a decoding process and a hardware size while performing a decoding. CONSTITUTION: A memory(100) stores an optimum register state value generated per step of an encoding. An optimum state discrimination part(400) discriminates a position of a register whose state is optimum in each step among the state values of the register stored in the memory and then outputs its position value. The first MUX(200) selects a state value of a position corresponding to the position value being output from the optimum state discrimination part among the state values of the registers per step being output from the memory by being synchronized to a system clock. And a storing part(LIFO, Last Input First Output)(300) stores the selected state values in sequence, and then outputs decoded data.
    • 目的:提供一种维特比解码器及其解码方法,它们在构成硬件时不受限制长度的长度的影响,并且在执行解码时简化了解码处理和硬件大小。 构成:存储器(100)存储每个编码步骤生成的最佳寄存器状态值。 最佳状态判别部分(400)鉴别在存储器中存储的寄存器的状态值中的每个步骤中状态最佳的寄存器的位置,然后输出其位置值。 通过与系统时钟同步,第一MUX(200)选择与从最佳状态判别部分输出的位置值相对应的状态值,该状态值是从存储器输出的每步骤的寄存器的状态值。 并且存储部分(LIFO,Last Input First Output)(300)按顺序存储所选择的状态值,然后输出解码数据。
    • 16. 发明授权
    • 비터비 복호기 및 그 복호 방법
    • 비터비복호기및그복호방법
    • KR100399410B1
    • 2003-09-26
    • KR1020000079279
    • 2000-12-20
    • 한화시스템 주식회사
    • 이병길김석중
    • H03M13/41
    • PURPOSE: A viterbi decoder and a decoding method thereof are provided, which are not affected by a length of a constraint length while constituting a hardware, and simplifies a decoding process and a hardware size while performing a decoding. CONSTITUTION: A memory(100) stores an optimum register state value generated per step of an encoding. An optimum state discrimination part(400) discriminates a position of a register whose state is optimum in each step among the state values of the register stored in the memory and then outputs its position value. The first MUX(200) selects a state value of a position corresponding to the position value being output from the optimum state discrimination part among the state values of the registers per step being output from the memory by being synchronized to a system clock. And a storing part(LIFO, Last Input First Output)(300) stores the selected state values in sequence, and then outputs decoded data.
    • 目的:提供一种维特比解码器及其解码方法,其在构成硬件时不受约束长度的长度的影响,并且在执行解码的同时简化解码处理和硬件大小。 构成:存储器(100)存储编码的每个步骤产生的最佳寄存器状态值。 最佳状态鉴别部分(400)鉴别存储在存储器中的寄存器的状态值之中的每个步骤中状态最佳的寄存器的位置,然后输出其位置值。 第一MUX(200)通过与系统时钟同步,从存储器输出的每一级寄存器的状态值中选择与从最佳状态鉴别部分输出的位置值相对应的位置的状态值。 并且存储部件(LIFO,最后输入第一输出)(300)依次存储选择的状态值,然后输出解码的数据。
    • 17. 发明公开
    • 직교주파수분할다중 통신시스템 수신기의 잔류주파수 오프셋보상장치 및 방법
    • 用于补偿正交频分多址(OFDM)的残留频率的装置及其方法
    • KR1020000065699A
    • 2000-11-15
    • KR1019990012309
    • 1999-04-08
    • 한화시스템 주식회사
    • 조은이김석중김호박선규
    • H04J11/00
    • H04L27/2665H04L27/2657H04L27/2666H04L2027/0026H04L2027/0067
    • PURPOSE: A device for compensating a residual frequency of OFDM(orthogonal frequency division multiplexing) is provided to compensate a residual offset generated between symbols after synchronizing a minute frequency by using a protection period in OFDM system. CONSTITUTION: A frequency offset compensator includes a memory, a protection period detector(302), a symbol tail detector(304), a phase difference detector(306), a phase difference accumulator(316), average phase difference calculator(310), and a frequency offset compensator(312). The memory buffers OFDM signal frame which is synchronized by a minute frequency, every frame unit. The protection period detector detects a protection period data of each symbol within OFDM signal frame. The symbol tail detector detects each symbol tail period data within OFDM signal frame. The phase difference detector detects a phase difference of each data detected by the detectors. The phase difference accumulator accumulates the phase difference of each data with a symbol unit. The average phase difference calculator calculates average phase difference by averaging a phase difference of each symbol. The frequency offset accumulator compensates each symbol's phase within OFDM frame by average phase difference generated from the average phase difference calculator.
    • 目的:提供用于补偿OFDM的残余频率(正交频分复用)的装置,以补偿在OFDM系统中使用保护周期来同步微小频率之后在符号之间产生的残余偏移。 构成:频率偏移补偿器包括存储器,保护周期检测器(302),符号尾部检测器(304),相位差检测器(306),相位差累加器(316),平均相位差计算器(310) 和频率偏移补偿器(312)。 存储器缓冲以每个帧为单位以微小频率同步的OFDM信号帧。 保护周期检测器检测OFDM信号帧内的每个符号的保护周期数据。 符号尾部检测器检测OFDM信号帧内的每个符号尾部周期数据。 相位差检测器检测由检测器检测的每个数据的相位差。 相位差累加器用符号单元累积每个数据的相位差。 平均相位差计算器通过对每个符号的相位差进行平均来计算平均相位差。 频率偏移累加器通过平均相位差计算器产生的平均相位差来补偿OFDM帧内的每个符号的相位。