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    • 25. 发明授权
    • Apparatus and method for reducing Bit Error Rates (BER) and Frame Error Rates (FER) using turbo decoding in a digital communication system
    • 用于在数字通信系统中使用turbo解码来降低误码率(BER)和帧错误率(FER)的装置和方法
    • US07032156B2
    • 2006-04-18
    • US10622508
    • 2003-07-21
    • Nam-Yul YuMin-Goo KimSang-Hyuck Ha
    • Nam-Yul YuMin-Goo KimSang-Hyuck Ha
    • H03M13/45
    • H03M13/3905H03M13/2957H03M13/3911
    • An Forward Error Correction (FEC) apparatus and method for reducing Bit error rates (BER) and Frame Error Rates (FER) using turbo decoding in a digital communication system. In a constituent decoder for decoding a turbo code, a first adder calculates the LLR of a received code symbol by calculating the difference between the probability of the code symbol being 1 and that of the code symbol being 0 at an arbitrary state of a turbo decoding trellis. A second adder adds the transmission information and a priori information of the code symbol. A third adder calculates the difference between the outputs of the first and second adders as extrinsic information. A first multiplier multiplies the output of the third adder by a predetermined weighting factor as a feedback gain. A correction value calculator calculates a correction value using the difference between the best metric and the second best metric of the code symbol. A fourth adder adds the correction value to the output of the first multiplier.
    • 一种用于在数字通信系统中使用turbo解码来降低误码率(BER)和帧错误率(FER)的前向纠错(FEC)装置和方法。 在用于解码turbo码的构成解码器中,第一加法器通过在Turbo解码的任意状态下计算代码符号为1的概率与代码符号为0的概率之间的差来计算接收到的代码符号的LLR 格子 第二加法器将传输信息和代码符号的先验信息相加。 第三加法器计算第一和第二加法器的输出之间的差作为外在信息。 第一乘法器将第三加法器的输出乘以预定的加权因子作为反馈增益。 校正值计算器使用代码符号的最佳度量和第二最佳度量之间的差来计算校正值。 第四加法器将校正值与第一乘法器的输出相加。
    • 27. 发明授权
    • Interleaving apparatus and method for a communication system
    • 用于通信系统的交错装置和方法
    • US06910110B2
    • 2005-06-21
    • US10338715
    • 2003-01-09
    • Min-Goo KimSang-Hyuck Ha
    • Min-Goo KimSang-Hyuck Ha
    • H03M13/27H04L1/00G06F12/00
    • H03M13/2789H03M13/271H03M13/276
    • An interleaving apparatus and method for a communication system which can be applied to determine a new interleaver size N′=2m×(j+1) and addresses of 0 to N′−1, if a given interleaver size N is larger than 2m×j and smaller than 2m×(j+1), where m represents a first parameter indicating a number of consecutive zero bits from a least significant bit (LSB) to a most significant bit (MSB), and j represents a second parameter corresponding to a decimal value other than said consecutive zero bits. The interleaving apparatus and method sequentially stores N input data bits in an interleaver memory with the new interleaver size N′ from an address 0 to an address N−1. The interleaving apparatus and method then executes a Partial Bit Reversal(PBRO)-interleaving the memory with the new interleaver size N′, and reads data from the memory by deleting addresses corresponding to addresses of N to N′−1 of the memory before interleaving.
    • 一种用于通信系统的交织装置和方法,其可应用于确定新的交织器尺寸N'= 2×(j + 1)和0至N'-1的地址,如果给定 交织器尺寸N大于2×xj且小于2×x(j + 1),其中m表示表示来自a的连续零位数的第一参数 最低有效位(LSB)到最高有效位(MSB),并且j表示对应于除了所述连续零位之外的十进制值的第二参数。 交织装置和方法将N个输入数据比特顺序地存储在具有新的交织器大小N'的交织器存储器中,从地址0到地址N-1。 然后,交织装置和方法执行部分位冲突(PBRO) - 以新的交织器大小N'交织存储器,并且通过在交织之前删除与存储器的N到N'-1的地址相对应的地址来从存储器读取数据 。
    • 30. 发明授权
    • Method and apparatus for receiving and deshuffling shuffled data in a high-rate packet data telecommunication system
    • 用于在高速率分组数据电信系统中接收和去混洗洗牌数据的方法和装置
    • US07349494B2
    • 2008-03-25
    • US10671553
    • 2003-09-29
    • Nam-Yul YuSang-Hyuck HaMin-Goo Kim
    • Nam-Yul YuSang-Hyuck HaMin-Goo Kim
    • H04L27/00
    • H04L1/0071H04L1/0003H04L1/007H04L1/0083H04L27/18H04L27/34
    • A method and apparatus for deshuffling received shuffled data in a communication system supporting multi-level modulation. A transmitter encodes information bits and shuffles code symbols so that systematic symbols having a relatively high priority are disposed at high-transmission reliability positions and parity symbols having a relatively low priority are disposed at low-transmission reliability positions in a modulation symbol. A receiver demodulates received data and outputs a modulation symbol having a plurality of code symbols, stores the code symbols separately as systematic symbols and parity symbols in corresponding memory areas according to a deshuffling order corresponding to the shuffling, reads the stored code symbols, decodes the stored code symbols at a predetermined code rate, and thus outputs an packet.
    • 一种在支持多级调制的通信系统中对混洗数据进行混洗的方法和装置。 发送器对信息比特进行编码并混合编码符号,使得具有较高优先级的系统符号被布置在高传输可靠性位置,并且具有较低优先级的奇偶校验符号被布置在调制符号中的低传输可靠性位置。 接收机对接收到的数据进行解调并输出具有多个码符号的调制符号,根据与洗牌相对应的混洗顺序将代码符号分别存储在相应的存储区域中作为系统符号和奇偶校验符号,读出存储的码元,对 以预定的码率存储代码符号,从而输出分组。