利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

101 条记录 (耗时 0.036 秒)

    Bit mapping/demapping method and apparatus for communication system
    33.
    发明授权
    Bit mapping/demapping method and apparatus for communication system 有权
    用于通信系统的位映射/解映射方法和装置

    公开(公告)号：US08397109B2

    公开(公告)日：2013-03-12

    申请号：US12641888

    申请日：2009-12-18

    申请人： Se Ho Myung ,  Jae Yoel Kim ,  Yeon Ju Lim ,  Sung-Ryul Yun ,  Hak Ju Lee

    发明人： Se Ho Myung ,  Jae Yoel Kim ,  Yeon Ju Lim ,  Sung-Ryul Yun ,  Hak Ju Lee

    IPC分类号： G06F11/00

    CPC分类号： H03M13/1102 ,  H03M13/255 ,  H03M13/356 ,  H03M13/616 ,  H04L1/0057 ,  H04L27/34 ,  H04L2001/0098

    摘要： An improved bit mapping method and apparatus for a communication system is provided. A bit mapping method of the present invention includes arranging coded bits in a codeword in an order of recovery capability. A shift region including a number of coded bits is set. The coded bits are rearranged in the shift region by shifting the shift region by a number of bits equal to a number of bits that is indicated by a shift factor. The rearranged coded bits are mapped into a modulation symbol in an order of reliability from a lowest reliability bit position to a highest reliability bit position of the modulation symbol.

    摘要翻译： 提供了一种用于通信系统的改进的位映射方法和装置。 本发明的比特映射方法包括按照恢复能力的顺序排列码字中的编码比特。 设置包括多个编码比特的移位区域。 通过将移位区域移位等于由移位因子指示的位数的位数，将编码比特重新排列在移位区域中。 重新排列的编码比特从调制符号的最低可靠性位位置到最高可靠性位位置的可靠性顺序被映射到调制符号中。

    Apparatus and method for reducing peak to average power ratio in an orthogonal frequency division multiplexing system
    35.
    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。

    Method and apparatus for channel encoding and decoding in a communication system using low-density parity-check codes
    36.
    发明授权
    Method and apparatus for channel encoding and decoding in a communication system using low-density parity-check codes 有权
    在使用低密度奇偶校验码的通信系统中进行信道编码和解码的方法和装置

    公开(公告)号：US08286065B2

    公开(公告)日：2012-10-09

    申请号：US12369504

    申请日：2009-02-11

    申请人： Seho Myung ,  Hwan-Joon Kwon ,  Jae-Yoel Kim ,  Yeon-Ju Lim ,  Sung-Ryul Yun ,  Hak-Ju Lee ,  Hong-Sil Jeong

    发明人： Seho Myung ,  Hwan-Joon Kwon ,  Jae-Yoel Kim ,  Yeon-Ju Lim ,  Sung-Ryul Yun ,  Hak-Ju Lee ,  Hong-Sil Jeong

    IPC分类号： H03M13/03

    CPC分类号： H03M13/6362 ,  H03M13/1165 ,  H03M13/1188 ,  H03M13/618 ,  H04L1/0057 ,  H04L1/0069

    摘要： An apparatus and method for encoding a channel in a communication system using a Low-Density Parity-Check (LDPC) code. The method includes determining a number of parity bits to be subjected to puncturing; dividing the parity bits at predetermined intervals, and determining a number of puncturing bits, which are subjected to puncturing within the predetermined intervals; determining positions of puncturing parity bits corresponding to the determined number of puncturing bits; and repeatedly performing puncturing on the puncturing parity bits corresponding to the determined positions at the predetermined intervals. The predetermined intervals are determined by dividing a length of parity bits by a length of one column group in a parity-check matrix.

    摘要翻译： 一种用于使用低密度奇偶校验（LDPC）码在通信系统中对信道进行编码的装置和方法。 该方法包括确定要进行穿孔的奇偶校验位数; 以预定间隔划分奇偶校验位，并且确定在预定间隔内进行穿孔的打孔位数; 确定与确定的删截位数相对应的删余奇偶校验位的位置; 并以预定间隔重复对与所确定的位置相对应的删余奇偶校验位进行删截。 通过将奇偶校验位的长度除以奇偶校验矩阵中的一列长度来确定预定间隔。