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    APPARATUS AND METHOD FOR REDUCING PEAK TO AVERAGE POWER RATIO IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
    41.
    发明申请
    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平均功率比的峰值的装置和方法

    公开(公告)号：US20080298490A1

    公开(公告)日：2008-12-04

    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： H04L27/28

    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。

    Apparatus and method for coding/decoding block low density parity check code in a mobile communication system
    42.
    发明授权
    Apparatus and method for coding/decoding block low density parity check code in a mobile communication system 有权
    在移动通信系统中对低密度奇偶校验码进行编码/解码的装置和方法

    公开(公告)号：US07313752B2

    公开(公告)日：2007-12-25

    申请号：US10926932

    申请日：2004-08-26

    申请人： Gyu-Bum Kyung ,  Hong-Sil Jeong ,  Jae-Yoel Kim ,  Sung-Eun Park ,  Kyeong-Cheol Yang ,  Se-Ho Myung

    发明人： Gyu-Bum Kyung ,  Hong-Sil Jeong ,  Jae-Yoel Kim ,  Sung-Eun Park ,  Kyeong-Cheol Yang ,  Se-Ho Myung

    IPC分类号： G06F11/00

    CPC分类号： H03M13/1105 ,  H03M13/1102 ,  H03M13/1151 ,  H03M13/1162 ,  H03M13/1171 ,  H03M13/118 ,  H03M13/1185 ,  H03M13/1188 ,  H03M13/1194

    摘要： A method for generating a parity check matrix of a block LDPC code is disclosed. The parity check matrix includes an information part corresponding to an information word and a first parity part and a second parity part each corresponding to a parity. The method includes determining a size of the parity check matrix based on a coding rate applied when coding the information word with the block LDPC code, and a codeword length; dividing a parity check matrix with the determined size into a predetermined number of blocks; classifying the blocks into blocks corresponding to the information part, blocks corresponding to the first parity part, and blocks corresponding to the second parity part; arranging permutation matrixes in predetermined blocks from among the blocks classified as the first parity part, and arranging identity matrixes in a full lower triangular form in predetermined blocks from among the blocks classified as the second parity part; and arranging the permutation matrixes in the blocks classified as the information part such that a minimum cycle length is maximized and weight values are irregular on a factor graph of the block LDPC code.

    摘要翻译： 公开了一种用于生成块LDPC码的奇偶校验矩阵的方法。 奇偶校验矩阵包括对应于信息字的信息部分和对应于奇偶校验的第一奇偶校验部分和第二奇偶校验部分。 该方法包括基于在使用块LDPC码对信息字进行编码时应用的编码率和码字长度来确定奇偶校验矩阵的大小; 将具有所确定的大小的奇偶校验矩阵除以预定数量的块; 将块分类为对应于信息部分的块，对应于第一奇偶校验部分的块，以及对应于第二奇偶校验部分的块; 从分类为第一奇偶校验部分的块中将预定块中的置换矩阵排列在预定块中的整个下三角形形式中的单位矩阵，从被分类为第二奇偶校验部分的块中排列; 以及将排列矩阵排列在分组为信息部分的块中，使得最小周期长度最大化，权重值在块LDPC码的因子图上是不规则的。

    Power distribution method and apparatus for OFDM system
    45.
    发明授权
    Power distribution method and apparatus for OFDM system 有权
    OFDM系统的功率分配方法和装置

    公开(公告)号：US08995538B2

    公开(公告)日：2015-03-31

    申请号：US12658293

    申请日：2010-02-05

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

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

    IPC分类号： H04L27/28 ,  H04L5/00 ,  H04L1/00

    CPC分类号： H04L5/0044 ,  H04L1/0026 ,  H04L1/0029 ,  H04L5/006

    摘要： An apparatus is capable of distributing power over a number of subcarriers in an OFDM system. The transmission power control method for an Orthogonal Frequency Division Multiplexing (OFDM) communication system according to the present invention includes measuring, at a receiver, channel coefficients of subcarriers, classifying the subcarriers into a predetermined number of groups according to sizes of channel coefficients, generating group indices, and transmitting the group indices of the subcarriers to a transmitter. A transmitter is capable of receiving the group indices of the subcarriers, determining per-group transmission powers, allocating the per-group transmission powers to the corresponding groups, distributing the per-group transmission power over subcarriers in the same level within respective groups, and transmitting signals over the subcarriers with the distributed power level.

    摘要翻译： 一种装置能够在OFDM系统中的多个子载波上分配功率。 根据本发明的用于正交频分复用（OFDM）通信系统的发送功率控制方法包括：在接收机处测量子载波的信道系数，根据信道系数的大小将子载波分类为预定数量的组，生成 组索引，并将子载波的组索引发送到发射机。 发射机能够接收子载波的组索引，确定每组发射功率，向相应组分配每组发射功率，在各组内的相同电平上的子载波上分配每组发射功率，以及 在具有分布式功率电平的子载波上传输信号。

    Method and apparatus for transmitting and receiving data in broadcasting system
    46.
    发明授权
    Method and apparatus for transmitting and receiving data in broadcasting system 有权
    在广播系统中发送和接收数据的方法和装置

    公开(公告)号：US08948287B2

    公开(公告)日：2015-02-03

    申请号：US13532197

    申请日：2012-06-25

    申请人： Hong-Sil Jeong ,  Se-Ho Myung

    发明人： Hong-Sil Jeong ,  Se-Ho Myung

    IPC分类号： H04L5/12 ,  H04L23/02 ,  H04L1/00 ,  H04L1/18

    CPC分类号： H04L27/36 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/1819

    摘要： Methods and apparatus are provided for transmitting data in a broadcasting system. Input data is encoded by an encoder. A first demultiplexer generates first transmission symbols using the encoded data. The first transmission symbols are modulated, and the modulated first transmission symbols are transmitted. A second demultiplexer generates second transmission symbols using at least a portion of the encoded data. The second transmission symbols are modulated and the modulated second transmission symbols are transmitted.

    摘要翻译： 提供了用于在广播系统中发送数据的方法和装置。 输入数据由编码器编码。 第一解复用器使用编码数据生成第一传输符号。 第一传输符号被调制，并且发送调制的第一传输符号。 第二解复用器使用编码数据的至少一部分来生成第二传输符号。 调制第二传输符号并发送调制的第二传输符号。

    Apparatus and method for channel encoding and decoding based on low-density parity check code in multiple antenna communication system
    49.
    发明授权
    Apparatus and method for channel encoding and decoding based on low-density parity check code in multiple antenna communication system 有权
    基于多天线通信系统中低密度奇偶校验码的信道编码和解码装置及方法

    公开(公告)号：US08689090B2

    公开(公告)日：2014-04-01

    申请号：US13324517

    申请日：2011-12-13

    申请人： Se-Ho Myung ,  Hong-Sil Jeong ,  Hyun-Koo Yang

    发明人： Se-Ho Myung ,  Hong-Sil Jeong ,  Hyun-Koo Yang

    IPC分类号： H03M13/03

    CPC分类号： H03M13/6393 ,  H03M13/1102 ,  H04L1/0045 ,  H04L1/0057

    摘要： Methods and apparatuses are provided for achieving maximum diversity gain through channel coding based on a Low-Density Parity-Check (LDPC) code in a multiple antenna communication system. A method includes determining a parity-check matrix; generating a codeword using the parity-check matrix; puncturing a part of an information word; dividing a parity into a plurality of partial parities based on a number of transmit antennas; transmitting an unpunctured part of the information word and a partial parity over a first antenna; and transmitting at least one other partial parity over at least one other transmit antenna.

    摘要翻译： 提供了用于通过基于多天线通信系统中的低密度奇偶校验（LDPC）码的信道编码实现最大分集增益的方法和装置。 一种方法包括确定奇偶校验矩阵; 使用奇偶校验矩阵生成码字; 刺穿一部分信息字; 基于发射天线的数量将奇偶校验分为多个部分奇偶校验; 在第一天线上发送所述信息字的未穿透部分和部分奇偶校验; 以及在至少一个其他发射天线上发射至少一个其它部分奇偶校验。

    Channel-encoding/decoding apparatus and method using low-density parity-check codes
    50.
    发明授权
    Channel-encoding/decoding apparatus and method using low-density parity-check codes 有权
    信道编码/解码装置和使用低密度奇偶校验码的方法

    公开(公告)号：US08495459B2

    公开(公告)日：2013-07-23

    申请号：US12624098

    申请日：2009-11-23

    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： H03M13/00

    CPC分类号： H03M13/1165 ,  H03M13/1185 ,  H03M13/6516

    摘要： An encoding/decoding apparatus and method using a low-density parity-check code (LDPC code) is disclosed. Basic column group information, serving as a set of information regarding positions of rows with weight 1, is extracted from a reference column in each column group of a predetermined parity-check matrix. Column group information transforms the positions of rows with weight 1 into positions whose lengths are within a required parity length. A parity-check matrix is generated according to the generated column group information. Data is encoded or decoded based on the generated parity-check matrix.

    摘要翻译： 公开了一种使用低密度奇偶校验码（LDPC码）的编码/解码装置和方法。 从预定奇偶校验矩阵的每列组中的参考列中提取用作关于具有权重1的行的位置的信息集合的基本列组信息。 列组信息将具有权重1的行的位置变换为长度在所需奇偶校验长度内的位置。 根据生成的列组信息生成奇偶校验矩阵。 基于生成的奇偶校验矩阵对数据进行编码或解码。