公开(公告)号：US20130251055A1

公开(公告)日：2013-09-26

申请号：US13587296

申请日：2012-08-16

申请人： Chang Wahn YU ,  Gweon Do JO ,  Jung Hoon OH ,  Kwang Chun LEE ,  Jae Ho JUNG

发明人： Chang Wahn YU ,  Gweon Do JO ,  Jung Hoon OH ,  Kwang Chun LEE ,  Jae Ho JUNG

IPC分类号： H04L27/28

CPC分类号： H04L5/0007 ,  H04L27/2614 ,  H04L27/2627

摘要： Disclosed are a signal distortion component adjusting apparatus and method capable of adjusting error vector magnitude of subcarriers of a predetermined position by adjusting a signal distortion component occurring while decreasing a peak to average power ratio (PAPR) in a communication system of an orthogonal frequency division multiplexing (OFDM) technology or an orthogonal frequency division multiple access (OFDMA) scheme, and a system using the same. The present invention includes a signal distortion component adjusting unit to add an additional signal distortion component Pe((n+N/2) % N) to a signal distortion component e(n) that is obtained by subtracting a threshold Th value, set to decrease peak power, from an absolute value of a time domain signal x(n) of an input signal, and to thereby adjust the signal distortion component. The present invention may transmit a highly reliable signal by adjusting error vector magnitude of subcarrier of a frequency domain.

摘要翻译： 公开了一种信号失真分量调整装置和方法，其能够通过调整在正交频分复用的通信系统中降低峰均功率比（PAPR）的同时发生的信号失真分量来调整预定位置的子载波的误差矢量幅度 （OFDM）技术或正交频分多址（OFDMA）方案，以及使用它们的系统。 本发明包括一个信号失真分量调整单元，用于将附加信号失真分量Pe（（n + N / 2）％N）加到通过将阈值Th值减去得到的信号失真分量e（n） 从输入信号的时域信号x（n）的绝对值减小峰值功率，从而调整信号失真分量。 本发明可以通过调整频域的子载波的误差矢量幅度来发送高度可靠的信号。

公开(公告)号：US20130163690A1

公开(公告)日：2013-06-27

申请号：US13545691

申请日：2012-07-10

申请人： Gweon Do JO ,  Chang Wahn YU ,  Heon Kook KWON ,  Byung Su KANG ,  Kwang Chun LEE

发明人： Gweon Do JO ,  Chang Wahn YU ,  Heon Kook KWON ,  Byung Su KANG ,  Kwang Chun LEE

IPC分类号： H04L27/12 ,  H04B1/66

CPC分类号： H03M7/6023 ,  H04L27/26

摘要： The method for transmitting a signal of an orthogonal frequency division multiplexing type according to an exemplary embodiment of the present invention has a configuration allowing a radio unit (RU) to perform a component adding a compression component and a decompression component before/after a serial interface interlocking between a digital unit (DU) and the radio unit (RU) and a component inserting a cyclic prefix (CP) into a signal so as to secure orthogonality of an orthogonal frequency division multiplexing (OFDM) signal, in a structure in which a base station is physically divided into the DU and the RU.

摘要翻译： 根据本发明的示例性实施例的用于发送正交频分复用类型的信号的方法具有允许无线电单元（RU）在串行接口之前/之后执行添加压缩分量和解压缩分量的分量的配置 在数字单元（DU）和无线电单元（RU）之间互锁，以及将一个循环前缀（CP）插入到信号中以便确保正交频分复用（OFDM）信号的正交性的组件，其中 基站在物理上分为DU和RU。

公开(公告)号：US20100135438A1

公开(公告)日：2010-06-03

申请号：US12627506

申请日：2009-11-30

申请人： Young Jo BANG ,  Hyeong Sook PARK ,  Jun-Woo KIM ,  Kyung Yeol SOHN ,  Chang Wahn YU ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

发明人： Young Jo BANG ,  Hyeong Sook PARK ,  Jun-Woo KIM ,  Kyung Yeol SOHN ,  Chang Wahn YU ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

IPC分类号： H04L27/06

CPC分类号： H04L25/067 ,  H04B7/0413

摘要： Disclosed is a method of detecting signals at a receiver of a communication system with a multiple input multiple output antenna. With the signal detection method, a square of the distance between a received signal vector and a channel status-considered transmission symbol vector is calculated first, and the square of the distance is then classified into first and second components. The first component is minimized to calculate a plurality of first soft symbol estimates. A solution set of the first component is calculated on the basis of the plurality of first soft symbol estimates. The second component is minimized to calculate a plurality of second soft symbol estimates. A solution set of the second component is calculated on the basis of the plurality of second soft symbol estimates. A final solution set is calculated by doing the sum of the first component solution set and the second component solution.

摘要翻译： 公开了一种在具有多输入多输出天线的通信系统的接收机处检测信号的方法。 利用信号检测方法，首先计算接收信号矢量和通道状态考虑的发送符号向量之间的距离的平方，然后将距离的平方分成第一和第二分量。 将第一分量最小化以计算多个第一软符号估计。 基于多个第一软符号估计来计算第一分量的解集合。 将第二分量最小化以计算多个第二软符号估计。 基于多个第二软符号估计来计算第二分量的解集合。 通过执行第一分量解集合和第二分量解的和来计算最终解集。

公开(公告)号：US20090154540A1

公开(公告)日：2009-06-18

申请号：US12212433

申请日：2008-09-17

申请人： Chang Wahn YU ,  Kyung-Yeol SOHN ,  Hyuk Jun OH ,  Youn Ok PARK

发明人： Chang Wahn YU ,  Kyung-Yeol SOHN ,  Hyuk Jun OH ,  Youn Ok PARK

IPC分类号： H04B3/46

CPC分类号： H04L25/0244 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0228

摘要： The present invention relates to a method and apparatus for estimating a channel in a mobile communication network. In particular, the present invention relates to a method of estimating a channel under a channel environment where interference between neighboring base stations exists in a mobile communication network using an orthogonal frequency division multiplexing (OFDM) method. In order to estimate a channel, one cluster is divided into two sub-clusters, and pilot sub-carrier signals included in at least one sub-cluster in an OFDM symbol direction are used. Therefore, it is possible to further improve performance as compared to a method of estimating a channel by using pilot sub-carriers included in one cluster.

摘要翻译： 本发明涉及一种用于估计移动通信网络中的信道的方法和装置。 具体地说，本发明涉及一种使用正交频分复用（OFDM）方法估计在移动通信网络中存在相邻基站之间的干扰的信道环境下的信道的方法。 为了估计信道，一个簇被划分成两个子簇，并且使用包括在OFDM符号方向上的至少一个子簇中的导频子载波信号。 因此，与通过使用包括在一个簇中的导频子载波来估计信道的方法相比，可以进一步提高性能。

公开(公告)号：US20180279245A1

公开(公告)日：2018-09-27

申请号：US12906496

申请日：2010-10-18

申请人： Chang Wahn YU ,  Youn Ok PARK ,  Chong Hyun LEE ,  Jun-Woo KIM ,  Seungjae BAHNG ,  Byung-Han RYU ,  Jung Pil CHOI ,  Young Jo BANG

发明人： Chang Wahn YU ,  Youn Ok PARK ,  Chong Hyun LEE ,  Jun-Woo KIM ,  Seungjae BAHNG ,  Byung-Han RYU ,  Jung Pil CHOI ,  Young Jo BANG

IPC分类号： H04W56/00

CPC分类号： H04W56/004 ,  H04W56/0055

摘要： An apparatus and method for detecting synchronization and signals using block data processing in a receiving system are provided. To process an input signal, a cumulative matrix is obtained from an input vector signal for each frame generated from the signal. A primary eigenvector is extracted from the cumulative matrix, and the maximum value of a correlation vector is calculated from the extracted primary eigenvector. A time delay is detected by comparing the calculated maximum value of the correlation vector with a first threshold value, and a delay correlation vector is calculated from the detected time delay. Finally, synchronization and signals are detected by comparing the calculated delay correlation vector with a second threshold value.

公开(公告)号：US20090147892A1

公开(公告)日：2009-06-11

申请号：US12204464

申请日：2008-09-04

申请人： Hoon LEE ,  Chang Wahn YU ,  Youn Ok PARK

发明人： Hoon LEE ,  Chang Wahn YU ,  Youn Ok PARK

IPC分类号： H04B1/10

CPC分类号： H04L25/03159 ,  H04L27/2647

摘要： An apparatus for canceling interference includes a plurality of converters, a plurality of interference cancellation units, a plurality of variance detectors, and an output selecting unit. The plurality of converters converts a plurality of received signals to a plurality of frequency domain signals, respectively. The plurality of interference cancellation units cancel interference in the plurality of frequency domain signals using a plurality of interference cancellation schemes to generate a plurality of interference-canceled signals corresponding to the plurality of interference cancellation schemes, respectively. The plurality of variance detectors measure a plurality of amounts of residual interference corresponding to the plurality of interference-canceled signals, respectively. The output selecting unit selects a single interference-canceled signal with the least amount of residual interference from the plurality of interference-canceled signals, based on the plurality of amounts of residual interference.

摘要翻译： 用于消除干扰的装置包括多个转换器，多个干扰消除单元，多个方差检测器和输出选择单元。 多个转换器将多个接收信号分别转换成多个频域信号。 多个干扰消除单元使用多个干扰消除方案来消除多个频域信号中的干扰，以分别产生与多个干扰消除方案对应的多个干扰消除信号。 多个方差检测器分别测量与多个干扰消除信号相对应的多个残余干扰量。 输出选择单元基于多个残留干扰量从多个干扰消除信号中选择具有最小残留干扰量的单个干扰消除信号。

公开(公告)号：US20110103521A1

公开(公告)日：2011-05-05

申请号：US12734984

申请日：2008-09-01

申请人： Chang Wahn YU ,  Dong Weon Yoon ,  Kwang Min Hyun ,  Youn Ok Park ,  Dae Ho Kim ,  Jun-Woo Kim ,  Hyeong Sook Park ,  Seung Jae Bahng ,  Young Jo Bang ,  Kyung Yeol Sohn

发明人： Chang Wahn YU ,  Dong Weon Yoon ,  Kwang Min Hyun ,  Youn Ok Park ,  Dae Ho Kim ,  Jun-Woo Kim ,  Hyeong Sook Park ,  Seung Jae Bahng ,  Young Jo Bang ,  Kyung Yeol Sohn

IPC分类号： H04L27/06

CPC分类号： H04L25/067 ,  H04L1/005

摘要： Disclosed is a method and apparatus for composing a received symbol signal modulated with a bit reflected Gray code into bit information. According to an embodiment of the present invention, a positive integer of the received symbol signal having bits is assigned according to the Gray mapping rule, and a sign is determined. A value that is indicative of an arrangement of the bits constituting the received symbol signal is calculated. A boundary value in at least one bit group consisting of the bits constituting the received symbol signal is acquired, and a difference from an absolute value of the received symbol signal is calculated. The received symbol signal is converted into information per bit using a value of the received symbol signal based on the positive integer and the determined sign, the value that is indicative of the bit arrangement, and the difference from the absolute value. Therefore, it is possible to reduce complexity in bitwise decomposition for an iterative decoder inevitably used in a receiver.

摘要翻译： 公开了一种用于将被反映格雷码的位进行调制的接收符号信号组合成比特信息的方法和装置。 根据本发明的实施例，根据Gray映射规则分配具有位的接收符号信号的正整数，并且确定符号。 计算表示构成接收符号信号的位的排列的值。 获取由构成接收到的符号信号的比特组构成的至少一个比特组中的边界值，并且计算与接收到的符号信号的绝对值的差值。 基于正整数和确定的符号，指示比特排列的值以及与绝对值的差，使用接收到的符号信号的值将接收的符号信号转换为每位的信息。 因此，可以降低在接收机中不可避免地使用的迭代解码器的逐位分解的复杂度。

公开(公告)号：US20090147894A1

公开(公告)日：2009-06-11

申请号：US12127342

申请日：2008-05-27

申请人： Young Jo BANG ,  Chang Wahn YU ,  Seung Jae BAHNG ,  Dae Ho KIM ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

发明人： Young Jo BANG ,  Chang Wahn YU ,  Seung Jae BAHNG ,  Dae Ho KIM ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

IPC分类号： H04B1/10

CPC分类号： H04B7/0413 ,  H04B7/0854

摘要： The present invention relates to a transmission symbol detection method in a multiple antenna system. In the present invention, when a channel matrix is estimated through channel estimation, a receiving side calculates a Q matrix and an R matrix through QR decomposition that is more simplified than a typical QR decomposition from an augmented channel matrix that includes the estimated channel matrix. In addition, the receiving side detects symbols having the minimum Euclidean metric by using the two matrixes, as transmission symbols.

摘要翻译： 本发明涉及多天线系统中的发射符号检测方法。 在本发明中，当通过信道估计来估计信道矩阵时，接收侧通过QR分解来计算Q矩阵和R矩阵，其比来自包括估计信道矩阵的增强信道矩阵的典型QR分解更简化。 此外，接收端通过使用两个矩阵来检测具有最小欧几里德量度的符号作为发送符号。

公开(公告)号：US20090052593A1

公开(公告)日：2009-02-26

申请号：US12142600

申请日：2008-06-19

申请人： Seung Jae BAHNG ,  Chang Wahn YU ,  Young Jo BANG ,  Dae Ho KIM ,  Young Ha LEE ,  Youn Ok PARK

发明人： Seung Jae BAHNG ,  Chang Wahn YU ,  Young Jo BANG ,  Dae Ho KIM ,  Young Ha LEE ,  Youn Ok PARK

IPC分类号： H04L27/06

CPC分类号： H04L25/03318 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/067

摘要： The present invention relates to a log-likelihood ratio calculation method, a transmitting signal detection method, and a receiver. The present invention estimates a channel on the basis of the received signal and rearranges a plurality of layers. Further, at the time of rearrangement of the layers, a symbol of a layer having the lowest reliability is considered for every constellation dot, and the successive interference for the remaining layers is removed corresponding to the constellation dots of the layer having the lowest reliability to set the transmitting symbol candidate vector. Furthermore, a log-likelihood ratio for every bit of the plurality of layers is calculated using the transmitting symbol candidate vector to decode the channel.

摘要翻译： 本发明涉及对数似然比计算方法，发送信号检测方法和接收机。 本发明基于接收到的信号来估计信道并重排多个层。 此外，在层的重排时，对于每个星座点考虑具有最低可靠性的层的符号，并且对应于具有最低可靠性的层的星座点去除对剩余层的连续干扰， 设置发送符号候选向量。 此外，使用发送符号候选向量计算多个层中的每一比特的对数似然比，以解码该信道。