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1. 发明授权

US08040980B2 Log likelihood ratio calculation method, transmit signal detection method, and receiver 有权
标题翻译：对数似然比计算方法，发射信号检测方法和接收机
公开(公告)号：US08040980B2
公开(公告)日：2011-10-18
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 , H03K9/00 , H04L27/00
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。

2. 发明申请

US20100135438A1 SIGNAL DETECTION METHOD AND RECEIVER 有权
标题翻译：信号检测方法与接收机
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。

3. 发明申请

US20080305804A1 Method and Apparatus for Uplink Timing Synchronization with Ranging Signal in Mobile Communication System 有权
标题翻译：移动通信系统中测距信号上行时序同步的方法与装置
公开(公告)号：US20080305804A1
公开(公告)日：2008-12-11
申请号：US12094763
申请日：2006-12-08
申请人： Young-Ha Lee , Chang-Wahn Yu , Youn-Ok Park
发明人： Young-Ha Lee , Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04Q7/20 , H04M1/00
CPC分类号： H04L27/2655 , H04L27/2646
摘要： When a base station of a time division duplex based mobile communication system receives an initial ranging request signal from a subscriber station, the base station generates initial ranging information including delay time information to the subscriber station, and receives uplink data delayed and transmitted using a delay time from the subscriber station. Also, when the subscriber station transmits an initial ranging request signal to the base station and receives initial ranging information including delay time information from the base station, the subscriber station establishes a transmission parameter value by using the transmission parameter value included in the initial ranging information and transmits uplink data by using the established delay time.
摘要翻译：当基于时分双工的移动通信系统的基站从用户站接收到初始测距请求信号时，基站向用户站生成包括延迟时间信息的初始测距信息，并且接收延迟并使用延迟发送的上行链路数据来自用户站的时间。此外，当用户台向基站发送初始测距请求信号并从基站接收包括延迟时间信息的初始测距信息时，用户台通过使用包含在初始测距信息中的传输参数值来建立传输参数值并通过使用建立的延迟时间来发送上行链路数据。

4. 发明申请

US20050141626A1 Uplink channel estimation system for orthogonal frequency division multiple access system and method thereof 有权
标题翻译：用于正交频分多址系统的上行链路信道估计系统及其方法
公开(公告)号：US20050141626A1
公开(公告)日：2005-06-30
申请号：US10970208
申请日：2004-10-20
申请人： Young-Ha Lee , Chang-Wahn Yu , Youn-Ok Park , Seung-Ku Hwang
发明人： Young-Ha Lee , Chang-Wahn Yu , Youn-Ok Park , Seung-Ku Hwang
IPC分类号： H04J11/00 , H04K1/10 , H04L5/02 , H04L25/02 , H04L27/26
CPC分类号： H04L25/0232 , H04L5/023
摘要： In the uplink of an OFDMA system, a preamble is used to estimate a channel and then the pilot tones of a data symbol are used for channel estimation to update the channel estimate. The channel estimate is used for channel compensation, and the phase of the channel is corrected using the channel estimate obtained from the pilot tones. In this way, the channel estimation performance and hence the compensation ability can be enhanced.
摘要翻译：在OFDMA系统的上行链路中，使用前导码来估计信道，然后将数据符号的导频音调用于信道估计以更新信道估计。信道估计用于信道补偿，并且使用从导频音获得的信道估计来校正信道的相位。以这种方式，可以提高信道估计性能和补偿能力。

5. 发明授权

US08767853B2 Apparatus and method for controlling distortion signal and system by using the same 有权
标题翻译：用于控制失真信号和系统的装置和方法
公开(公告)号：US08767853B2
公开(公告)日：2014-07-01
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： H04K1/10 , 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。

6. 发明授权

US08654905B2 Method and apparatus for canceling interference 有权
标题翻译：消除干扰的方法和装置
公开(公告)号：US08654905B2
公开(公告)日：2014-02-18
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。

7. 发明授权

US08559566B2 Method and apparatus for decomposing received symbol signal modulated with bit reflected gray code in bit information 有权
标题翻译：用于在位信息中分解用位反射灰度码调制的接收符号信号的方法和装置
公开(公告)号：US08559566B2
公开(公告)日：2013-10-15
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。

8. 发明授权

US08135099B2 Method for detecting transmission symbols in multiple antenna system 有权
标题翻译：用于检测多天线系统中发射符号的方法
公开(公告)号：US08135099B2
公开(公告)日：2012-03-13
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。

9. 发明授权

US07742391B2 Apparatus and method for estimating frequency offset 有权
标题翻译：用于估计频率偏移的装置和方法
公开(公告)号：US07742391B2
公开(公告)日：2010-06-22
申请号：US11636809
申请日：2006-12-11
申请人： Chang-Wahn Yu , Youn-Ok Park
发明人： Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04J11/00
CPC分类号： H04L27/2657 , H04L27/0014 , H04L27/2675 , H04L2027/003 , H04L2027/0046 , H04L2027/0067 , H04L2027/0087
摘要： In a frequency offset estimating device of a subscriber station of a communication system in which a plurality of sectors are allocated to a cell, the frequency offset estimating device extracts a preamble sequence from a downlink frame signal. The frequency offset estimating device estimates a phase offset of a sector to which the subscriber station belongs among the sectors by using the preamble sequence, and calculates the autocorrelation value for the respective signals of the preamble sequence. The frequency offset estimating device compensates the autocorrelation value by using the phase offset, and estimates a frequency offset from the sum of the phase offset compensated autocorrelation values.
摘要翻译：在将多个扇区分配给小区的通信系统的用户台的频率偏移估计装置中，频率偏移估计装置从下行链路帧信号中提取前置码序列。频率偏移估计装置通过使用前置码序列来估计用户站所属的扇区的相位偏移，并且计算前导序列的各个信号的自相关值。频率偏移估计装置通过使用相位偏移来补偿自相关值，并且从相位偏移补偿自相关值的和估计频率偏移。

10. 发明申请

US20070147225A1 Apparatus and method for estimating frequency offset 有权
标题翻译：用于估计频率偏移的装置和方法
公开(公告)号：US20070147225A1
公开(公告)日：2007-06-28
申请号：US11636809
申请日：2006-12-11
申请人： Chang-Wahn Yu , Youn-Ok Park
发明人： Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L27/2657 , H04L27/0014 , H04L27/2675 , H04L2027/003 , H04L2027/0046 , H04L2027/0067 , H04L2027/0087
摘要： In a frequency offset estimating device of a subscriber station of a communication system in which a plurality of sectors are allocated to a cell, the frequency offset estimating device extracts a preamble sequence from a downlink frame signal. The frequency offset estimating device estimates a phase offset of a sector to which the subscriber station belongs among the sectors by using the preamble sequence, and calculates the autocorrelation value for the respective signals of the preamble sequence. The frequency offset estimating device compensates the autocorrelation value by using the phase offset, and estimates a frequency offset from the sum of the phase offset compensated autocorrelation values.
摘要翻译：在将多个扇区分配给小区的通信系统的用户台的频率偏移估计装置中，频率偏移估计装置从下行链路帧信号中提取前置码序列。频率偏移估计装置通过使用前置码序列来估计用户站所属的扇区的相位偏移，并且计算前导序列的各个信号的自相关值。频率偏移估计装置通过使用相位偏移来补偿自相关值，并且从相位偏移补偿自相关值的和估计频率偏移。

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