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1. 发明授权

US07734988B2 Method for puncturing a low density parity check code 有权
标题翻译：打孔低密度奇偶校验码的方法
公开(公告)号：US07734988B2
公开(公告)日：2010-06-08
申请号：US11541749
申请日：2006-10-02
申请人： Dong-Ho Kim , Yung-Soo Kim , Ye-Hoon Lee , Myeon-Gyun Cho , Hyo-Yol Park , Keum-Chan Whang , Kwang-Soon Kim , Jae-Won Kang
发明人： Dong-Ho Kim , Yung-Soo Kim , Ye-Hoon Lee , Myeon-Gyun Cho , Hyo-Yol Park , Keum-Chan Whang , Kwang-Soon Kim , Jae-Won Kang
IPC分类号： H03M13/35
CPC分类号： H03M13/1102 , H03M13/6306 , H03M13/6362
摘要： A method for puncturing a Low Density Parity Check (LDPC). The method includes a) setting a codeword length and the total number of bit nodes to be punctured; b) selecting a check node (or check nodes) with highest priority excluding check nodes completely checked in a current round; c) selecting a bit node (or bit nodes) with a highest priority excluding bit nodes completely checked among bit nodes connected to the selected check node (or check nodes); d) determining whether the selected bit node is a bit node to be punctured, that is, it is not systematic, not set by a puncturing prohibition flag; e) puncturing an associated bit node if the selected bit node is the bit node to be punctured, setting unpunctured bit nodes connected to the selected check node by a puncturing prohibition flag, decreasing the number of remained bit nodes to be punctured by 1 and increasing the number of connected punctured node of associated check node by 1; f) determining whether the number of remaining bits to be punctured is greater than 0; and g) returning to step b) if the number of remaining bits to be punctured is greater than 0, and ending a puncturing process if the number of remaining bits to be punctured is not greater than 0.
摘要翻译：一种用于打孔低密度奇偶校验（LDPC）的方法。该方法包括：a）设置码字长度和要被穿孔的比特节点的总数; b）选择具有最高优先级的校验节点（或校验节点），不包括在当前轮次中完全检查的校验节点; c）选择具有最高优先级的比特节点（或比特节点），不包括连接到所选择的校验节点（或校验节点）的比特节点之间完全检查的比特节点; d）确定所选择的比特节点是否是要被穿孔的比特节点，即，它不是系统的，不被打孔禁止标志设置; e）如果选择的比特节点是要被穿孔的比特节点，则对相关联的比特节点进行穿孔，通过打孔禁止标志来设置连接到所选择的校验节点的未穿孔比特节点，将要被穿孔的剩余比特节点的数量减少1并增加相关检查节点的连接穿孔节点数目为1; f）确定要穿孔的剩余比特数是否大于0; 以及g）如果要删除的剩余比特数大于0，则返回到步骤b），并且如果要穿孔的剩余比特数不大于0，则结束打孔处理。

2. 发明申请

US20080305818A1 Adaptive Transmission Device Using Limited Feedback Information in a Mobile Communication System, and a Method Thereof 有权
标题翻译：在移动通信系统中使用有限反馈信息的自适应传输设备及其方法
公开(公告)号：US20080305818A1
公开(公告)日：2008-12-11
申请号：US12096324
申请日：2005-12-19
申请人： Young-Jo Ko , Jae-Young Ahn , Kwang-Soon Kim , Jung-Hyoung Kwon , Keum-Chan Whang
发明人： Young-Jo Ko , Jae-Young Ahn , Kwang-Soon Kim , Jung-Hyoung Kwon , Keum-Chan Whang
IPC分类号： H04Q7/00
CPC分类号： H04W72/0453 , H04L5/006 , H04L5/023 , H04L25/0204 , H04L27/2608 , H04W72/085
摘要： The present invention relates to an adaptive transmitting device using limited feedback information in a mobile communication system, and a method thereof. According to an exemplary embodiment of the present invention, when the base station transmits a pilot signal to the terminal, the terminal generates channel information by using the pilot signal, generates additional channel information from the channel information, and transmits the channel information and the additional channel information to the base station. The base station determines band allocation, power allocation, and modulation methods for each use by using received feedback information, and transmits modulated traffic data to the terminal according to the determined methods.
摘要翻译：本发明涉及一种在移动通信系统中使用有限反馈信息的自适应发送装置及其方法。根据本发明的示例性实施例，当基站向终端发送导频信号时，终端通过使用导频信号生成信道信息，从信道信息生成附加信道信息，并发送信道信息和附加信道信道信息到基站。基站通过使用接收到的反馈信息来确定每个使用的频带分配，功率分配和调制方法，并且根据确定的方法向终端发送调制的业务数据。

3. 发明授权

US07292644B2 Apparatus and method for generating space-time trellis code for maximizing space-time diversity gain and coding gain in a mobile communication system 有权
标题翻译：用于产生空时格码的装置和方法，用于在移动通信系统中最大化时空分集增益和编码增益
公开(公告)号：US07292644B2
公开(公告)日：2007-11-06
申请号：US10630215
申请日：2003-07-30
申请人： Keum-Chan Whang , Chan-Soo Hwang
发明人： Keum-Chan Whang , Chan-Soo Hwang
IPC分类号： H04B7/02
CPC分类号： H04L1/0618 , H04B7/0669
摘要： Disclosed is a method for generating a space-time trellis code (STTC) for maximizing space-time diversity gain and coding gain in a mobile communication system including at least two transmission antennas and generating a second number of STTC codes with an information data bit stream upon receiving the information data bit stream comprised of a first number of bits. The method comprises calculating a minimum effective length for each of the STTC codes; calculating product distances between all STTC codes having the same length as the minimum effective length, wherein for each of pairs of all initial states and all end states for each of the STTC codes, initial states are identical to end states; summing reciprocals of product distances between all the STTC codes for each of the STTC codes, and calculating minimum average product distances by determining a reciprocal of the summation result; and selecting an STTC code corresponding to a minimum average product distance having a maximum value among the minimum average product distances as an STTC code corresponding to the information data bit stream.
摘要翻译：公开了一种用于在包括至少两个发送天线的移动通信系统中产生用于最大化时空分集增益和编码增益的时空网格码（STTC）的方法，并且用信息数据比特流生成第二数量的STTC码一旦接收到由第一位数组成的信息数据比特流。该方法包括计算每个STTC码的最小有效长度; 计算具有与最小有效长度相同长度的所有STTC码之间的商品距离，其中对于每个STTC码的所有初始状态和所有结束状态的对中的每一对，初始状态与终端状态相同; 对每个STTC代码对所有STTC代码之间的乘积距离进行求和，并且通过确定求和结果的倒数来计算最小平均乘积距离; 以及将与所述最小平均乘积距离中具有最大值的最小平均乘积距离对应的STTC码选择为与所述信息数据比特流对应的STTC码。

4. 发明授权

US08117516B2 Apparatus and method for signal transmission/reception in a communication system 有权
标题翻译：通信系统中信号发送/接收的装置和方法
公开(公告)号：US08117516B2
公开(公告)日：2012-02-14
申请号：US11935259
申请日：2007-11-05
申请人： Dong-Ho Kim , Yung-Soo Kim , Tak-Ki Yu , Keum-Chan Whang , Kwang-Soon Kim , Hyo-Yol Park
发明人： Dong-Ho Kim , Yung-Soo Kim , Tak-Ki Yu , Keum-Chan Whang , Kwang-Soon Kim , Hyo-Yol Park
IPC分类号： H03M13/00
CPC分类号： H03M13/1102 , H03M13/033 , H03M13/6393
摘要： A method and an apparatus for transmitting a signal in a communication system are provided. An information vector is encoded according to a Low Density Parity Check (LDPC) encoding scheme, thereby generating an LDPC codeword. Minimum surviving check nodes are reserved for recovery of punctured nodes in the LDPC codeword. A check node is selected having a smallest cost function from among unreserved check nodes. A variable node is selected being unpunctured and having a smallest cost function from among variable nodes connected to the selected check node. The selected variable node is punctured when the selected variable node is not connected to the reserved check node. A stopping set check is performed when the selected variable node is connected to the reserved check node. The variable node is punctured when the stopping set check has been successfully performed. The check node is selected until there remains no variable node to be punctured and puncturing the variable node.
摘要翻译：提供了一种用于在通信系统中发送信号的方法和装置。根据低密度奇偶校验（LDPC）编码方案对信息向量进行编码，从而生成LDPC码字。保留最小存活检查节点用于恢复LDPC码字中的穿孔节点。从未预留的校验节点中选择具有最小成本函数的校验节点。从连接到所选择的校验节点的变量节点中选择变量节点是未穿刺的并且具有最小的成本函数。当所选择的变量节点未连接到保留的校验节点时，所选择的变量节点被打孔。当所选变量节点连接到保留校验节点时，执行停止集检查。当成功执行停止设置检查时，变量节点被打孔。选中校验节点，直到不存在要删除的变量节点并对该变量节点进行删截。

5. 发明申请

US20060239368A1 Apparatus and method for estimating frequency offset in Orthogonal Frequency Division Multiplexing system 失效
标题翻译：正交频分复用系统估计频偏的装置及方法
公开(公告)号：US20060239368A1
公开(公告)日：2006-10-26
申请号：US11401484
申请日：2006-04-11
申请人： Jong-Yoon Hwang , Kwang-Soon Kim , Keum-Chan Whang
发明人： Jong-Yoon Hwang , Kwang-Soon Kim , Keum-Chan Whang
IPC分类号： H04K1/10
CPC分类号： H04L27/2657 , H04L27/2676
摘要： An apparatus and method for estimating a frequency offset in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. Two time domain signals are generated from one received OFDM symbol through two observation windows with different delay times. The two time domain signals are compensated for a candidate frequency offset. A discrete Fourier transform process and a phase compensation process in a frequency domain are performed. A difference between two frequency domain signals compensated for a phase difference is computed with respect to each candidate frequency offset. For all candidate frequency offsets, difference values are compared with each other. A candidate frequency offset mapped to a minimum difference value is detected as an optimal frequency offset. The frequency offset can be more exactly estimated without consuming a bandwidth and increasing hardware complexity of a receiver.
摘要翻译：提供了一种用于估计正交频分复用（OFDM）系统中的频率偏移的装置和方法。通过具有不同延迟时间的两个观察窗从一个接收的OFDM符号生成两个时域信号。对候选频率偏移补偿两个时域信号。执行频域中的离散付里叶变换处理和相位补偿处理。针对每个候选频率偏移计算补偿相位差的两个频域信号之间的差异。对于所有候选频率偏移量，将差值进行比较。映射到最小差值的候选频率偏移被检测为最佳频率偏移。可以更精确地估计频率偏移，而不消耗带宽并增加接收机的硬件复杂度。

6. 发明授权

US06609008B1 Method and apparatus for controlling signal power level in a communication system 有权
标题翻译：用于控制通信系统中的信号功率电平的方法和装置
公开(公告)号：US06609008B1
公开(公告)日：2003-08-19
申请号：US09711110
申请日：2000-11-09
申请人： Keum-Chan Whang , Hyuck-Chan Kwon
发明人： Keum-Chan Whang , Hyuck-Chan Kwon
IPC分类号： H04B700
CPC分类号： H04W52/20 , H04W52/12 , H04W52/24
摘要： A novel and improved method and apparatus for controlling signal power level in a communication system (100) is provided by determining first and second signal to interference ratios of a received signal, respectively before and after an interference cancellation, determining a difference between the first and second signal to interference ratios, and determining, based on the difference, a signal to interference threshold for controlling power level of a signal transmitted from a source of the received signal.
摘要翻译：通过分别在干扰消除之前和之后确定接收信号的第一和第二信号干扰比来确定通信系统（100）中的信号功率电平的控制的新颖和改进的方法和装置，确定第一和第第二信号与干扰比，以及基于所述差确定用于控制从所述接收信号的源发送的信号的功率电平的信号与干扰阈值。

7. 发明授权

US08666426B2 Adaptive transmission device using limited feedback information in a mobile communication system, and a method thereof 有权
标题翻译：在移动通信系统中使用有限反馈信息的自适应传输设备及其方法
公开(公告)号：US08666426B2
公开(公告)日：2014-03-04
申请号：US12096324
申请日：2005-12-19
申请人： Young-Jo Ko , Jae-Young Ahn , Kwang-Soon Kim , Jung-Hyoung Kwon , Keum-Chan Whang
发明人： Young-Jo Ko , Jae-Young Ahn , Kwang-Soon Kim , Jung-Hyoung Kwon , Keum-Chan Whang
IPC分类号： H04W72/00
CPC分类号： H04W72/0453 , H04L5/006 , H04L5/023 , H04L25/0204 , H04L27/2608 , H04W72/085
摘要： The present invention relates to an adaptive transmitting device using limited feedback information in a mobile communication system, and a method thereof. According to an exemplary embodiment of the present invention, when the base station transmits a pilot signal to the terminal, the terminal generates channel information by using the pilot signal, generates additional channel information from the channel information, and transmits the channel information and the additional channel information to the base station. The base station determines band allocation, power allocation, and modulation methods for each use by using received feedback information, and transmits modulated traffic data to the terminal according to the determined methods.
摘要翻译：本发明涉及一种在移动通信系统中使用有限反馈信息的自适应发送装置及其方法。根据本发明的示例性实施例，当基站向终端发送导频信号时，终端通过使用导频信号生成信道信息，从信道信息生成附加信道信息，并发送信道信息和附加信道信道信息到基站。基站通过使用接收到的反馈信息来确定每个使用的频带分配，功率分配和调制方法，并且根据确定的方法向终端发送调制的业务数据。

8. 发明授权

US07643566B2 Apparatus and method for estimating frequency offset in orthogonal frequency division multiplexing system 失效
标题翻译：在正交频分复用系统中估计频偏的装置和方法
公开(公告)号：US07643566B2
公开(公告)日：2010-01-05
申请号：US11401484
申请日：2006-04-11
申请人： Jong-Yoon Hwang , Kwang-Soon Kim , Keum-Chan Whang
发明人： Jong-Yoon Hwang , Kwang-Soon Kim , Keum-Chan Whang
IPC分类号： H04K1/10
CPC分类号： H04L27/2657 , H04L27/2676
摘要： An apparatus and method for estimating a frequency offset in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. Two time domain signals are generated from one received OFDM symbol through two observation windows with different delay times. The two time domain signals are compensated for a candidate frequency offset. A discrete Fourier transform process and a phase compensation process in a frequency domain are performed. A difference between two frequency domain signals compensated for a phase difference is computed with respect to each candidate frequency offset. For all candidate frequency offsets, difference values are compared with each other. A candidate frequency offset mapped to a minimum difference value is detected as an optimal frequency offset. The frequency offset can be more exactly estimated without consuming a bandwidth and increasing hardware complexity of a receiver.
摘要翻译：提供了一种用于估计正交频分复用（OFDM）系统中的频率偏移的装置和方法。通过具有不同延迟时间的两个观察窗从一个接收的OFDM符号生成两个时域信号。对候选频率偏移补偿两个时域信号。执行频域中的离散付里叶变换处理和相位补偿处理。针对每个候选频率偏移计算补偿相位差的两个频域信号之间的差异。对于所有候选频率偏移量，将差值进行比较。映射到最小差值的候选频率偏移被检测为最佳频率偏移。可以更精确地估计频率偏移，而不消耗带宽并增加接收机的硬件复杂度。

9. 发明授权

US06788733B1 Method and apparatus for interference cancellation in a communication system 失效
标题翻译：通信系统中干扰消除的方法和装置
公开(公告)号：US06788733B1
公开(公告)日：2004-09-07
申请号：US09711108
申请日：2000-11-09
申请人： Keum-Chan Whang , Hyuck-Chan Kwon
发明人： Keum-Chan Whang , Hyuck-Chan Kwon
IPC分类号： H04B169
CPC分类号： H04L1/005 , H04B1/7107 , H04L1/0066
摘要： A novel and improved method and apparatus in a communication system (100) provides for efficient processing of received signals. The method and apparatus includes converting an encoded and spectrum spread received signal to received samples, determining a first channel estimate based on a first set of pilot signal samples. The first set of pilot signal samples are included in the received samples. The received samples are passed through a correlation and decoding process in accordance with the first channel estimate to produce decoded received samples. The decoded received samples are re-encoded and re-spreaded to produce re-encoded and re-spread samples. The re-encoded and re-spread samples are modified based on the first channel estimate to produce channel modified re-encoded and re-spread samples. The received samples pass through an interference cancellation that uses the channel modified re-encoded and re-spread samples to produce a new set of received samples.
摘要翻译：通信系统（100）中的新颖和改进的方法和装置提供了对接收信号的有效处理。该方法和装置包括将编码和频谱扩展的接收信号转换为接收样本，基于第一组导频信号样本确定第一信道估计。第一组导频信号样本包括在接收的样本中。接收的样本根据第一信道估计通过相关和解码处理，以产生经解码的接收样本。解码的接收样本被重新编码并重新扩展以产生重新编码和重新扩展的样本。基于第一信道估计来修改重新编码和重新扩展的样本，以产生信道修改的重新编码和再扩展样本。接收的样本通过干扰消除，其使用信道修改的重新编码和重新扩展样本以产生一组新的接收样本。

10. 发明申请

US20080101491A1 Method for transmitting signal in wireless communication system 有权
标题翻译：在无线通信系统中发送信号的方法
公开(公告)号：US20080101491A1
公开(公告)日：2008-05-01
申请号：US11981981
申请日：2007-10-31
申请人： Sang-Min Lee , Myeon-Gyun Cho , Yu-Seok Kim , Keum-Chan Whang , Jae-Won Kang , Sun-Young Lee
发明人： Sang-Min Lee , Myeon-Gyun Cho , Yu-Seok Kim , Keum-Chan Whang , Jae-Won Kang , Sun-Young Lee
IPC分类号： H04L27/28
CPC分类号： H04L27/0008 , H04L5/0007 , H04L5/0044
摘要： A method for transmitting a signal in a wireless communication system. The method comprises the steps of: grouping two subcarriers having different channel characteristics; identifying a number of all cases occurring when either equal symbols or different symbols, among symbols determined upon applying a first modulation scheme, are mapped to the two subcarriers; and mapping two subcarriers corresponding to each of the number of all cases to one symbol according to a second modulation scheme, and transmitting the signal, wherein a modulation order of the second modulation scheme is two times higher than a modulation order of the second modulation.
摘要翻译：一种在无线通信系统中发送信号的方法。该方法包括以下步骤：对具有不同信道特性的两个子载波进行分组; 识别当在应用第一调制方案确定的符号中的任一个相等符号或不同符号时发生的所有情况的数量被映射到两个子载波; 以及根据第二调制方案将与所有情况中的每一个对应的两个子载波映射到一个符号，并且发送所述信号，其中所述第二调制方案的调制阶数是所述第二调制的调制阶数的两倍。

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