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    APPARATUS AND METHOD FOR CHANNEL ENCODING/DECODING IN COMMUNICATION SYSTEM USING VARIABLE-LENGTH LDPC CODES
    22.
    发明申请
    APPARATUS AND METHOD FOR CHANNEL ENCODING/DECODING IN COMMUNICATION SYSTEM USING VARIABLE-LENGTH LDPC CODES 有权
    使用可变长度LDPC码的通信系统中通道编码/解码的装置和方法

    公开(公告)号：US20090070652A1

    公开(公告)日：2009-03-12

    申请号：US12208316

    申请日：2008-09-10

    申请人： Seho Myung ,  Hong-Sil Jeong ,  Jae-Yoel Kim ,  Sung-Ryul Yun ,  Hak-Ju Lee

    发明人： Seho Myung ,  Hong-Sil Jeong ,  Jae-Yoel Kim ,  Sung-Ryul Yun ,  Hak-Ju Lee

    IPC分类号： H03M13/05 ,  G06F11/10

    CPC分类号： H03M13/1185 ,  H03M13/618 ,  H03M13/6362 ,  H03M13/6393

    摘要： A method and apparatus for generating Low-Density Parity Check (LDPC) codes of various block lengths from a structured LDPC code in a communication system is provided. To support various block lengths, predefined rules are applied to a parity check matrix of an LDPC code, and then shortening is selectively applied to the parity check matrix. Subsequently, if information data bits are input, the input data information bits are encoded into an LDPC codeword by using the parity check matrix according to a preset encoding scheme, and then the encoded LDPC codeword is transmitted after puncturing is selectively applied.

    摘要翻译： 提供了一种用于从通信系统中的结构化LDPC码生成各种块长度的低密度奇偶校验（LDPC）码的方法和装置。 为了支持各种块长度，将预定义的规则应用于LDPC码的奇偶校验矩阵，然后选择性地将缩短选择性地应用于奇偶校验矩阵。 随后，如果输入信息数据位，则通过使用根据预设编码方案的奇偶校验矩阵将输入数据信息比特编码为LDPC码字，然后选择性地应用穿孔后发送编码的LDPC码字。

    Apparatus and method for reducing peak to average power ratio in an orthogonal frequency division multiplexing system
    28.
    发明授权
    Apparatus and method for reducing peak to average power ratio in an orthogonal frequency division multiplexing system 有权
    在正交频分复用系统中降低峰均功率比的装置和方法

    公开(公告)号：US08300714B2

    公开(公告)日：2012-10-30

    申请号：US12133108

    申请日：2008-06-04

    申请人： Sung-Ryul Yun ,  Jae-Yoel Kim ,  Hak-Ju Lee ,  Hong-Sil Jeong ,  Se-Ho Myung

    发明人： Sung-Ryul Yun ,  Jae-Yoel Kim ,  Hak-Ju Lee ,  Hong-Sil Jeong ,  Se-Ho Myung

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2618 ,  H04L5/0048

    摘要： A method for reducing a Peak to Average Power Ratio (PAPR) using reserved tones in a transmission apparatus of an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes detecting a subcarrier spacing interval and the number of spaced symbols based on a predetermined pilot pattern upon signal reception, and determining positions of shifted reserved tones obtained by shifting positions of reserved tones allocated to a predetermined symbol during the number of the spaced symbols at intervals of the spacing interval; determining an impulse waveform obtained by rotating a phase of a complex value of an impulse stored in a memory, using the determined positions of frequency-domain reserved tones of each symbol; calculating a subtrahend for a PAPR of an output signal using the phase-rotated impulse waveform; and reducing a PAPR of an input signal by performing a gradient algorithm using the phase-rotated impulse waveform.

    摘要翻译： 提供了一种在正交频分复用（OFDM）通信系统的发送装置中使用保留音降低峰均功率比（PAPR）的方法。 该方法包括在信号接收时基于预定导频模式检测子载波间隔间隔和间隔符号数，以及确定在间隔符号的数量期间通过移位分配给预定符号的保留音调的位置而获得的移位保留音的位置 间隔间隔的间隔; 使用确定的每个符号的频域保留音调的位置来确定通过旋转存储在存储器中的脉冲的复数值的相位而获得的脉冲波形; 使用相位旋转脉冲波形计算输出信号的PAPR的减数; 以及通过使用相位旋转的脉冲波形执行梯度算法来减小输入信号的PAPR。