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1. 发明申请

US20070110191A1 Method and apparatus for normalizing input metric to a channel decoder in a wireless communication system 有权
标题翻译：用于在无线通信系统中将输入度量归一化到信道解码器的方法和装置
公开(公告)号：US20070110191A1
公开(公告)日：2007-05-17
申请号：US11594991
申请日：2006-11-09
申请人： Sang-Hyo Kim , Min-Goo Kim , Young-Mo Gu
发明人： Sang-Hyo Kim , Min-Goo Kim , Young-Mo Gu
IPC分类号： H04L27/06
CPC分类号： H04L27/0008 , H04B1/707 , H04L1/0052 , H04L1/0066 , H04L1/0075 , H04L25/067 , H04L27/2601
摘要： An apparatus and method are provided for normalizing input soft metric to a channel decoder in a wireless communication system. A demapper generates soft metric using an in-phase component (Xk) and a quadrature component (Yk) of a received modulated symbol (Rk), a channel fading coefficient (gk) and a constant value (c) defined by a modulation order of the received modulated symbol. A normalizer receives the soft metric, computes a normalized log likelihood ratio (LLR) by multiplying the soft metric by a ratio of the constant value to a noise variance value, transforms the normalized LLR into a desired range and a desired number of bits, and outputs an input LLR of the channel decoder.
摘要翻译：提供了一种用于在无线通信系统中将输入软度量化到信道解码器的装置和方法。解映射器使用接收的调制符号（R＆lt; k＆gt;）的同相分量（X SUB）和正交分量（Y SUB）来产生软度量， SUB>），信道衰落系数（g k）和由接收的调制符号的调制阶数定义的常数值（c）。规范化器接收软度量，通过将软度量乘以常数值与噪声方差值的比率来计算归一化对数似然比（LLR），将归一化的LLR转换成期望的范围和期望的位数，以及输出信道解码器的输入LLR。

2. 发明申请

US20060156183A1 Method and apparatus for generating a low-density parity check code 有权
公开(公告)号：US20060156183A1
公开(公告)日：2006-07-13
申请号：US11289300
申请日：2005-11-30
申请人： Sang-Hyo Kim , Han-Ju Kim , Min-Goo Kim , Young-Mo Gu
发明人： Sang-Hyo Kim , Han-Ju Kim , Min-Goo Kim , Young-Mo Gu
IPC分类号： H03M13/00
CPC分类号： H03M13/6362 , H03M13/116 , H03M13/118 , H03M13/1185 , H03M13/1188
摘要： A low density parity check (LDPC) code generating method and apparatus are provided. A parity check matrix with (N−K) rows for check nodes and N columns for variable nodes are formed to encode an information sequence of length K to a codeword of length N. The parity check matrix is divided into an information part matrix with K columns and a parity part matrix with (N−k) columns. The parity part is divided into P×P subblocks. P is a divisor of (N−K). First and second diagonals are defined in the parity part matrix and the second diagonal is a shift of the first diagonal by f subblocks. Shifted identity matrices are placed on the first and second diagonals and zero matrices are filled elsewhere. An odd number of delta matrices each having only one element of 1 are placed in one subblock column of the parity part matrix. The parity check matrix is stored.

3. 发明授权

US07860194B2 Method and apparatus for normalizing input metric to a channel decoder in a wireless communication system 有权
标题翻译：用于在无线通信系统中将输入度量归一化到信道解码器的方法和装置
公开(公告)号：US07860194B2
公开(公告)日：2010-12-28
申请号：US11594991
申请日：2006-11-09
申请人： Sang-Hyo Kim , Min-Goo Kim , Young-Mo Gu
发明人： Sang-Hyo Kim , Min-Goo Kim , Young-Mo Gu
IPC分类号： H04L27/06
CPC分类号： H04L27/0008 , H04B1/707 , H04L1/0052 , H04L1/0066 , H04L1/0075 , H04L25/067 , H04L27/2601
摘要： An apparatus and method are provided for normalizing input soft metric to a channel decoder in a wireless communication system. A demapper generates soft metric using an in-phase component (Xk) and a quadrature component (Yk) of a received modulated symbol (Rk), a channel fading coefficient (gk) and a constant value (c) defined by a modulation order of the received modulated symbol. A normalizer receives the soft metric, computes a normalized log likelihood ratio (LLR) by multiplying the soft metric by a ratio of the constant value to a noise variance value, transforms the normalized LLR into a desired range and a desired number of bits, and outputs an input LLR of the channel decoder.
摘要翻译：提供了一种用于在无线通信系统中将输入软度量化到信道解码器的装置和方法。解映射器使用接收的调制符号（Rk）的同相分量（X k）和正交分量（Y k），通过衰减系数（gk）和常数值（c）定义的调制阶数接收到的调制符号。规范化器接收软度量，通过将软度量乘以常数值与噪声方差值的比率来计算归一化对数似然比（LLR），将归一化的LLR转换成期望的范围和期望的位数，以及输出信道解码器的输入LLR。

4. 发明授权

US07536623B2 Method and apparatus for generating a low-density parity check code 有权
标题翻译：用于生成低密度奇偶校验码的方法和装置
公开(公告)号：US07536623B2
公开(公告)日：2009-05-19
申请号：US11289300
申请日：2005-11-30
申请人： Sang-Hyo Kim , Han-Ju Kim , Min-Goo Kim , Young-Mo Gu
发明人： Sang-Hyo Kim , Han-Ju Kim , Min-Goo Kim , Young-Mo Gu
IPC分类号： H03M13/13
CPC分类号： H03M13/6362 , H03M13/116 , H03M13/118 , H03M13/1185 , H03M13/1188
摘要： A low density parity check (LDPC) code generating method and apparatus are provided. A parity check matrix with (N−K) rows for check nodes and N columns for variable nodes are formed to encode an information sequence of length K to a codeword of length N. The parity check matrix is divided into an information part matrix with K columns and a parity part matrix with (N−k) columns. The parity part is divided into P×P subblocks. P is a divisor of (N−K). First and second diagonals are defined in the parity part matrix and the second diagonal is a shift of the first diagonal by f subblocks. Shifted identity matrices are placed on the first and second diagonals and zero matrices are filled elsewhere. An odd number of delta matrices each having only one element of 1 are placed in one subblock column of the parity part matrix. The parity check matrix is stored.
摘要翻译：提供了一种低密度奇偶校验（LDPC）码生成方法和装置。形成具有用于校验节点的（NK）行和用于可变节点的N列的奇偶校验矩阵，以将长度为K的信息序列编码为长度为N的码字。奇偶校验矩阵被划分为具有K列的信息部分矩阵，具有（Nk）列的奇偶校验部分矩阵。奇偶校验部分分为PxP子块。 P是（N-K）的除数。在奇偶校验部分矩阵中定义第一和第二对角线，第二对角线是第一对角线由f子块的移位。移位的身份矩阵放置在第一和第二个对角线上，零矩阵填充到别处。每个仅具有1个元素的奇数数量的Δ矩阵被放置在奇偶校验部分矩阵的一个子块列中。存储奇偶校验矩阵。

5. 发明授权

US07822153B2 Automatic gain control apparatus and method in an orthogonal frequency division multiple access system 有权
标题翻译：一种正交频分多址系统中的自动增益控制装置及方法
公开(公告)号：US07822153B2
公开(公告)日：2010-10-26
申请号：US11348345
申请日：2006-02-07
申请人： Yong-Chul Song , Young-Mo Gu , Min-Goo Kim
发明人： Yong-Chul Song , Young-Mo Gu , Min-Goo Kim
IPC分类号： H04L27/06
CPC分类号： H03G3/3063
摘要： An automatic gain control (AGC) apparatus of a wireless mobile terminal, and method, in an orthogonal frequency division multiple access (OFDMA) system. A gain amplifier controls an amplification gain of received analog symbols. An analog-to-digital converter converts the received analog symbols into a digital signal. A fast Fourier transform (FFT) unit converts the digital signal into a frequency-domain signal. A power measurer measures power in the frequency domain in units of sub-carriers. A sub-carrier power accumulator detects a sub-carrier carrying a signal, and accumulates its power value. A sub-carrier average power measurer estimates an average power value transmitted per sub-carrier from the accumulated power value. A control means compares the estimated average power value with a reference power value, and generates a control signal used for controlling a gain of the gain amplifier according to the comparison result.
摘要翻译：一种在正交频分多址（OFDMA）系统中的无线移动终端的自动增益控制（AGC）装置和方法。增益放大器控制接收的模拟符号的放大增益。模数转换器将接收的模拟符号转换为数字信号。快速傅里叶变换（FFT）单元将数字信号转换成频域信号。功率测量器以子载波为单位测量频域的功率。子载波功率累加器检测携带信号的子载波，并累加其功率值。子载波平均功率测量器估计从累积功率值发送的每个副载波的平均功率值。控制装置将估计的平均功率值与参考功率值进行比较，并且根据比较结果产生用于控制增益放大器的增益的控制信号。

6. 发明申请

US20060215606A1 Apparatus and method for allocating frequency resources in mobile communication system 有权
标题翻译：移动通信系统中频率资源分配的装置和方法
公开(公告)号：US20060215606A1
公开(公告)日：2006-09-28
申请号：US11390126
申请日：2006-03-27
申请人： Hae-Dong Yeon , Yun-Sang Park , Min-Goo Kim , Bong-Gee Song , Young-Mo Gu , Jae-Yong Lee , Sung-Soo Kim , Sang-Hyuck Ha
发明人： Hae-Dong Yeon , Yun-Sang Park , Min-Goo Kim , Bong-Gee Song , Young-Mo Gu , Jae-Yong Lee , Sung-Soo Kim , Sang-Hyuck Ha
IPC分类号： H04Q7/00
CPC分类号： H04W72/0453
摘要： Disclosed is an apparatus and a method for effectively allocating frequency resources in a mobile communication system. The method includes: determining a first offset of a preset frequency band from among all frequency bands, determining a second offset corresponding to a symbol unit in the preset frequency band, and allocating frequency resources to data, the frequency resources corresponding to a sum of the first offset and the second offset.
摘要翻译：公开了一种在移动通信系统中有效地分配频率资源的装置和方法。该方法包括：从所有频带中确定预设频带的第一偏移，确定与预设频带中的符号单元相对应的第二偏移，并将频率资源分配给数据，频率资源对应于第一偏移和第二偏移。

7. 发明申请

US20060120266A1 Apparatus and method for processing digital signal in an OFDMA wireless communication system 失效
公开(公告)号：US20060120266A1
公开(公告)日：2006-06-08
申请号：US11274900
申请日：2005-11-16
申请人： Seong-Wook Song , Yong-Chul Song , Young-Mo Gu , Min-Goo Kim
发明人： Seong-Wook Song , Yong-Chul Song , Young-Mo Gu , Min-Goo Kim
IPC分类号： H04J11/00
CPC分类号： H04L27/263 , H04L27/2608
摘要： An apparatus and method is provided to process a digital signal in an orthogonal frequency division multiple access (OFDMA) wireless communication system. In the apparatus, a memory stores the number of subcarriers allocated to a mobile terminal and stores an inverse discrete Fourier transform (IDFT) coefficient. A controller outputs a mode selection signal indicating a transmission mode or a reception mode. An inverse fast Fourier transform (IFFT) block multiplies a first result obtained by determining a bitwidth for the IDFT coefficient according to the number of subcarriers by a second result obtained by determining a bitwidth for data according to the number of subcarriers.

8. 发明申请

US20050201270A1 Method and apparatus for transmitting and receiving pilot signals in an orthogonal frequency division multiple access system 审中-公开
标题翻译：用于在正交频分多址系统中发送和接收导频信号的方法和装置
公开(公告)号：US20050201270A1
公开(公告)日：2005-09-15
申请号：US11078620
申请日：2005-03-14
申请人： Seong-Wook Song , Young-Mo Gu , Min-Goo Kim
发明人： Seong-Wook Song , Young-Mo Gu , Min-Goo Kim
IPC分类号： H04J11/00 , H04B7/216
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/005
摘要： A method and apparatus are provided for transmitting and receiving pilot signals to estimate link gains and channels of neighboring base stations in an orthogonal frequency division multiple access (OFDMA) system. Each base station cyclically shifts a frequency domain signal of the same pseudo random (PN) code by a predetermined multiple of a time interval between pilots. A mobile terminal cyclically shifts a time domain pilot signal by a time interval between pilots associated with a base station with which the mobile terminal currently communicates in a reverse direction of cyclic shift of the base station, and estimates a channel and a link gain of the base station.
摘要翻译：提供一种用于发送和接收导频信号以估计正交频分多址（OFDMA）系统中相邻基站的链路增益和信道的方法和装置。每个基站将相同伪随机（PN）码的频域信号周期性地将导频之间的时间间隔的预定倍数移位。移动终端将时域导频信号循环移位与移动终端当前在基站的循环移位的相反方向上与之通信的基站相关联的导频之间的时间间隔，并估计基站的信道和链路增益基站。

9. 发明授权

US07747931B2 Apparatus and method for decoding burst in an OFDMA mobile communication system 有权
标题翻译：用于在OFDMA移动通信系统中解码突发的装置和方法
公开(公告)号：US07747931B2
公开(公告)日：2010-06-29
申请号：US11519779
申请日：2006-09-13
申请人： Han-Ju Kim , Young-Mo Gu , Dong-Woon Jung , Min-Goo Kim
发明人： Han-Ju Kim , Young-Mo Gu , Dong-Woon Jung , Min-Goo Kim
IPC分类号： H03M13/03
CPC分类号： H04L27/2647 , H04L1/0054 , H04L1/0059 , H04L1/0071 , H04L1/0072 , H04L1/08 , H04L5/023
摘要： A decoding apparatus in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system is provided. In the apparatus comprises, a first combiner performs first combining on an input burst a first number of times. A deinterleaver deinterleaves an output of the first combiner and outputs a burst having a repeated structure. A second combiner performs second combining on the burst having the repeated structure a second number of times. A decoder decodes the combined burst. A signal detector stores a second internal memory state value of the decoder for an instance where a first decoded bit is extracted from the decoded data, stores a second internal memory state value of the decoder for an instance where a last decoded bit is extracted from the decoded data, compares the first and second stored internal memory state values of the decoder, and sets a burst quality indicator (BQI) according to the comparison result.
摘要翻译：提供了一种正交频分多址（OFDMA）移动通信系统中的解码装置。在该装置中，第一组合器在输入突发上执行第一次合并。解交织器对第一组合器的输出进行解交织并输出具有重复结构的脉冲串。第二组合器在具有重复结构的脉冲串上执行第二次组合第二次。解码器解码组合突发。信号检测器存储解码器的第二内部存储器状态值，用于从解码数据中提取第一解码位的情况，存储解码器的第二内部存储器状态值，用于从其中提取最后一个解码位的情况解码数据，比较解码器的第一和第二存储的内部存储器状态值，并根据比较结果设置突发质量指示符（BQI）。

10. 发明授权

US07502311B2 Method and apparatus for detecting a cell in an orthogonal frequency division multiple access system 有权
标题翻译：用于检测正交频分多址系统中的小区的方法和装置
公开(公告)号：US07502311B2
公开(公告)日：2009-03-10
申请号：US11108071
申请日：2005-04-18
申请人： Seong-Wook Song , Young-Mo Gu , Min-Goo Kim
发明人： Seong-Wook Song , Young-Mo Gu , Min-Goo Kim
IPC分类号： H04J11/00
CPC分类号： H04B1/7083 , H04L5/0016 , H04L25/0216 , H04L27/2647
摘要： An apparatus and method are provided for detecting via a mobile station a cell in which the mobile station is located in order to initiate communication in an Orthogonal Frequency Division Multiple Access (OFDMA) system including a plurality of base stations transmitting signal with a pseudo-random noise (PN) code to the mobile station. The apparatus and method include receiving the signal from the base station and performing fast Fourier transform (FFT) on the received signal; generating a PN code for comparison with a base station's PN code included in the signal; and detecting a cell where the mobile station is located by searching for a PN code synchronized in the FFT-processed signal using the generated PN code.
摘要翻译：提供了一种装置和方法，用于经由移动台检测移动台所在的小区，以便在包括多个基站的正交频分多址（OFDMA）系统中发起通信，所述正交频分多址（OFDMA）系统发送具有伪随机信号的信号噪声（PN）码到移动台。该装置和方法包括从基站接收信号并对接收到的信号执行快速傅里叶变换（FFT）; 生成用于与包括在信号中的基站的PN码进行比较的PN码; 以及使用所生成的PN码，通过搜索在经FFT处理的信号中同步的PN码来检测移动站所在的小区。

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