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51. 发明申请

US20070177681A1 Mimo-ofdm system using eigenbeamforming method 有权
标题翻译：使用特征波束形成方法的Mimo-ofdm系统
公开(公告)号：US20070177681A1
公开(公告)日：2007-08-02
申请号：US10584641
申请日：2004-11-25
申请人： In-Kyeong Choi , Seong-Rag Kim , Dong-Seung Kwon , Jin-Ho Choi
发明人： In-Kyeong Choi , Seong-Rag Kim , Dong-Seung Kwon , Jin-Ho Choi
IPC分类号： H04L27/00 , H04K1/10 , H04L27/28
CPC分类号： H04L27/2626 , H04B7/0417 , H04B7/0634 , H04B7/065 , H04B7/066 , H04L1/06 , H04L1/0693 , H04L25/03343 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Disclosed is a MIMO-OFDM system, wherein the transmitter comprises a serial/parallel converter for converting continuously inputted symbols of the number of subcarriers to K parallel signals; a signal reproducer for reproducing K parallel signals by the number of transmit antennas L an eigenmode generator for generating eigenbeam of the reproduced signals outputted from the signal reproducer at each subcarrier, on the basis of Nf eigenbeam forming vectors which are fed back long-term and information of a best eigenbeam forming vector at each subcarrier which is fed back short-term, through the feedback device; and a plurality of inverse Fourier converters for receiving the signals outputted from the eigenmode generator and generating an OFDM symbol.
摘要翻译：公开了一种MIMO-OFDM系统，其中发射机包括串行/并行转换器，用于将连续输入的子载波数量的符号转换为K个并行信号; 信号再现器，用于根据发射天线L的数量再现K个并行信号，该天线本体模型发生器用于在每个子载波上从信号再现器输出的再生信号的本征波束，基于长期反馈的Nf本征波束形成向量，通过反馈装置在短时间反馈的每个子载波处的最佳特征波束形成矢量的信息; 以及多个逆傅里叶变换器，用于接收从本征模式发生器输出的信号并产生OFDM符号。

52. 发明授权

US08488705B2 Apparatus and method for generating symbol for multiple antennas 有权
标题翻译：用于生成多个天线的符号的装置和方法
公开(公告)号：US08488705B2
公开(公告)日：2013-07-16
申请号：US12513817
申请日：2007-03-13
申请人： Seung-Joon Lee , Dong-Seung Kwon
发明人： Seung-Joon Lee , Dong-Seung Kwon
IPC分类号： H04B7/02
CPC分类号： H04L1/0625 , H04L1/0606 , H04L1/0668 , H04L27/2634
摘要： The present invention relates a symbol generation apparatus for multiple antennas having low receiving complexity and having flexibility with respect to an increase in the number of antennas. The symbol generation apparatus includes a plurality of space-time channel encoders respectively corresponding to a plurality of channels, and an inverse fast Fourier transformer group. The respective space-time channel encoders receive a digital-modulated symbol group from the corresponding channel, perform a space-time encoding operation with respect to a plurality of space areas and at least one time area, shift phases by using a plurality of phase values, and generate a plurality of phase-shifted space-time codewords. The inverse fast Fourier transformer group performs an inverse fast Fourier transform operation by using the plurality of phase-shifted space-time codewords in a plurality of subcarriers respectively corresponding to the plurality of channels, and generates a plurality of inverse fast Fourier transformed signals.
摘要翻译：本发明涉及一种具有低接收复杂度的多个天线的符号产生装置，并且相对于天线数量的增加具有灵活性。符号生成装置包括分别对应于多个信道的多个时空信道编码器和快速傅立叶逆变换组。相应的时空信道编码器从对应的信道接收数字调制符号组，对多个空间区域和至少一个时间区域执行空时编码操作，通过使用多个相位值并产生多个相移时空码字。逆快速傅立叶变换组通过使用分别对应于多个通道的多个副载波中的多个相移时空码字执行快速傅立叶逆变换，并产生多个快速傅里叶逆变换信号。

53. 再颁专利

USRE44284E1 Cell search system for mobile station in time division duplex system and method for the same 有权
公开(公告)号：USRE44284E1
公开(公告)日：2013-06-11
申请号：US12692373
申请日：2010-01-22
申请人： Yu-Ro Lee , Dong-Seung Kwon
发明人： Yu-Ro Lee , Dong-Seung Kwon
IPC分类号： H04J3/06
CPC分类号： H04B1/7077 , H04B1/7083 , H04B2201/70702
摘要： A cell search system for a mobile station in a time division duplex system includes: a primary synchronization code search module for searching primary synchronization codes and comparing frame values of the primary synchronization codes to determine a position of the maximum value; a correlation module for estimating a phase value and acquiring a first correlation value; a secondary synchronization code search module for generating determinative variables and storing them based on the position of the maximum value; a comparison and decision module for detecting a maximum value of the determinative variables, comparing it with the values stored in the secondary synchronization code search module to count matching values, and comparing the count value with a system value to decide whether slot synchronization and group acquisition is successful; and a base station determination module for determining a second correlation value between midamble codes and the received signals, and selecting a maximum value of it to determine a base station.

54. 发明授权

US08117522B2 Sphere decoder and decoding method thereof 有权
标题翻译：球体解码器及其解码方法
公开(公告)号：US08117522B2
公开(公告)日：2012-02-14
申请号：US11722131
申请日：2005-12-21
申请人： Seong-Rag Kim , Seung-Joon Lee , Dong-Seung Kwon , Seong-Keun Oh , Hee-Goo Han
发明人： Seong-Rag Kim , Seung-Joon Lee , Dong-Seung Kwon , Seong-Keun Oh , Hee-Goo Han
IPC分类号： H03M13/03
CPC分类号： H04L25/03242 , H04L1/0045 , H04L1/06
摘要： A sphere decoder sets a Euclidean distance between a lattice vector obtained by using an MMSE or ZF estimate and a received signal as an initial radius, further reduces the initial radius, and searches lattices points included inside a hypersphere with the further reduced initial radius. In addition, one lattice vector having a minimum Euclidean distance is output. One dimension is selected to reduce an initial radius, and estimates in other dimensions are kept fixed, excluding the selected dimension. Then candidate lattice points are searched in the selected dimension, excluding a current estimate, such that a minimum Euclidean distance and a lattice point estimate corresponding to the minimum Euclidean distance are obtained. The initial radius is updated by the minimum Euclidean distance, and a final lattice vector is constructed by combining a lattice point estimate corresponding to the initial radius and the lattice point estimates in other dimensions.
摘要翻译：球体解码器设置通过使用MMSE或ZF估计获得的格子向量与作为初始半径的接收信号之间的欧氏距离，进一步减小初始半径，并且搜索包含在超球体内的具有进一步减小的初始半径的晶格点。此外，输出具有最小欧几里德距离的一个格子矢量。选择一个维度以减少初始半径，并且将其他维度的估计值保持固定，不包括所选维度。然后，在所选择的维度中搜索候选格点，排除当前估计，使得获得对应于最小欧几里德距离的最小欧几里德距离和格点估计。初始半径通过最小欧几里得距离来更新，并且通过组合对应于初始半径的网格点估计和其他维度中的格点估计来构造最终的格子矢量。

55. 发明授权

US08107514B2 Decoding method for space-time encoding transmission scheme in with multiple input multiple output system and receiving apparatus for using the method 有权
标题翻译：用于多输入多输出系统的空时编码传输方案的解码方法和使用该方法的接收装置
公开(公告)号：US08107514B2
公开(公告)日：2012-01-31
申请号：US11721110
申请日：2005-12-09
申请人： Seung-Joon Lee , Dong-Seung Kwon , Seong-Rag Kim , In-Kyeong Choi
发明人： Seung-Joon Lee , Dong-Seung Kwon , Seong-Rag Kim , In-Kyeong Choi
IPC分类号： H04B1/38
CPC分类号： H04L25/0208 , H04L1/0631 , H04L1/0668
摘要： A receiver according to an exemplary embodiment of the present invention receives a transmitted signal, converts the signal to a predetermined symbol, and estimates channel information including a channel gain of a channel of the transmitted signal. In addition, the receiver generates an intermediate processing value for decoding the signal based on the estimated channel information and the symbol, and normalizes the intermediate processing value to the channel gain to generate a reference value. The generated reference value is used for a soft-decision value for decoding the signal. In addition, when the signal is decoded by using a hard-decision value, a constellation point value that is closest to the reference values is generated and set as the hard-decision value.
摘要翻译：根据本发明的示例性实施例的接收机接收发送信号，将该信号转换成预定符号，并且估计包括发送信号的信道的信道增益的信道信息。此外，接收器基于估计的信道信息和符号生成用于对信号进行解码的中间处理值，并且将中间处理值归一化为信道增益以生成参考值。生成的参考值用于解码信号的软判决值。此外，当通过使用硬判决值来解码信号时，生成最接近参考值的星座点值并将其设置为硬判定值。

56. 发明授权

US07933629B2 Low-complexity joint transmit/receive antenna selection method for MIMO systems 失效
标题翻译： MIMO系统的低复杂度联合发射/接收天线选择方法
公开(公告)号：US07933629B2
公开(公告)日：2011-04-26
申请号：US12064184
申请日：2005-12-21
申请人： Dong-Seung Kwon , Chung-Gu Kang , Jun-Ho Son
发明人： Dong-Seung Kwon , Chung-Gu Kang , Jun-Ho Son
IPC分类号： H04M1/00
CPC分类号： H04B7/061 , H04B7/082
摘要： Provided is a low-complexity transmit/receive antenna selection method for Multi-Input Multi-Output (MIMO) systems. The method includes the steps of generating a gain matrix of receive channel, calculating norm values of channel gains for each row (receive antennas) and column (transmit antennas) of the generated gain matrix of the receive channel, selecting an antenna with the maximum norm value among the calculated norm values of channel gains, and repeatedly performing the process of alternately selecting transmit and receive antennas having the maximum channel gain value among the channel gain values of the selected antenna until a required number of antennas is all selected.
摘要翻译：提供了一种用于多输入多输出（MIMO）系统的低复杂度的发射/接收天线选择方法。该方法包括以下步骤：产生接收信道的增益矩阵，计算接收信道的所生成的增益矩阵的每行（接收天线）和列（发送天线）的信道增益的范数值，选择具有最大范数的天线并且重复执行交替选择所选天线的信道增益值之中具有最大信道增益值的发射和接收天线的处理，直到全部选择所需数量的天线。

57. 发明授权

US07889805B2 Smart antenna system and method thereof for forming uplink eigenbeam of OFDM/TDD 有权
标题翻译：智能天线系统及其形成OFDM / TDD上行固有光束的方法
公开(公告)号：US07889805B2
公开(公告)日：2011-02-15
申请号：US11579722
申请日：2004-11-10
申请人： Seong-Rag Kim , In-Kyeong Choi , Dong-Seung Kwon , Seung-Ku Hwang
发明人： Seong-Rag Kim , In-Kyeong Choi , Dong-Seung Kwon , Seung-Ku Hwang
IPC分类号： H04B7/02
CPC分类号： H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/086 , H04L5/023 , H04L5/1484 , H04L25/0228 , H04L25/0248 , H04L27/2647
摘要： A mobile station transmitting and receiving method and a corresponding mobile station transmitter and receiver of a smart antenna system for forming uplink eigenbeams of the OFDM/TDD (orthogonal frequency division multiplex/time division duplex), wherein OFDM symbols are received from a base station through a downlink via multiple antennas (250) and an FFT (fast Fourier transform) is performed on the received OFDM symbols by the FFT units (270). By means of a channel estimator (290) the channels are estimated and a beam weight generator (310) generates respective beam weights from the channels of the respective pilot tones of the respective subcarriers according to the channel estimation result. A beam weight multiplier (230) forms the uplink beam by multiplying the respective beam weights with the output of the signal repeater (220) and IFFT units (240) generate respective OFDM symbols which are transmitted via multiple antennas (250) through an uplink.
摘要翻译：一种用于形成OFDM / TDD（正交频分复用/时分双工）的上行固有光束的智能天线系统的移动台发射和接收方法和相应的移动台发射机和接收机，其中从基站通过通过FFT单元（270）对所接收的OFDM符号执行经由多个天线（250）和FFT（快速傅里叶变换）的下行链路。通过信道估计器（290），估计信道，并且波束权重发生器（310）根据信道估计结果从相应子载波的相应导频音调的信道生成相应的波束权重。波束权重乘法器（230）通过将各个波束权重与信号中继器（220）的输出相乘来形成上行链路波束，并且IFFT单元（240）生成经由多个天线（250）经由上行链路发送的各个OFDM符号。

58. 发明授权

US07783962B2 Iterative decoding receiver reducing complexity of partial sphere decoding in spatial multiplexing system and method thereof 失效
标题翻译：迭代解码接收机降低空间复用系统部分球体解码的复杂度及其方法
公开(公告)号：US07783962B2
公开(公告)日：2010-08-24
申请号：US11447132
申请日：2006-06-06
申请人： Dong-Seung Kwon , Chung-Gu Kang , Hyung-Ho Park
发明人： Dong-Seung Kwon , Chung-Gu Kang , Hyung-Ho Park
IPC分类号： H03M13/03
CPC分类号： H04L1/0631 , H04L1/0048 , H04L1/005 , H04L1/0055 , H04L25/03171 , H04L25/03242
摘要： The present invention relates to an iterative decoding receiver for reducing complexity of a partial sphere decoding operation in a spatial multiplexing system, and a method thereof. In the present invention, an iterative detection and decoding (IDD) method using a cost function-based iterative partial sphere decoding method and a soft cancellation-based iterative partial sphere decoding method is used to correct an initial estimation error. In a channel encoding spatial multiplexing system, since the iterative decoding receiver using decoding algorithms including a BCJR algorithm, an MPA, and a VA performs an SISO sphere decoding operation providing an optimum detection solution, the iterative decoding receiver may detect transmission symbols at a whole dimension by detecting the transmission symbols at a partial dimension, and therefore the complexity of the SISO sphere decoding operation may be greatly reduced.
摘要翻译：本发明涉及一种用于降低空间复用系统中部分球体解码操作的复杂度的迭代解码接收机及其方法。在本发明中，使用基于成本函数的迭代部分球解码方法和基于软消除的迭代部分球解码方法的迭代检测和解码（IDD）方法来校正初始估计误差。在空间复用系统的信道编码中，由于使用包括BCJR算法，MPA和VA的解码算法的迭代解码接收机进行提供最佳检测方案的SISO球体解码操作，所以迭代解码接收机可以在整体上检测发射符号通过检测部分维度上的传输符号，从而可以大大降低SISO球体解码操作的复杂度。

59. 发明授权

US07761112B2 Power control method for uplink in mobile communication and apparatus thereof 有权
标题翻译：用于移动通信中的上行链路的功率控制方法及其装置
公开(公告)号：US07761112B2
公开(公告)日：2010-07-20
申请号：US11653764
申请日：2007-01-16
申请人： Yu-Ro Lee , Een-Kee Hong , Dong-Cheol Kim , Hyun-Joon Shin , Dong-Seung Kwon
发明人： Yu-Ro Lee , Een-Kee Hong , Dong-Cheol Kim , Hyun-Joon Shin , Dong-Seung Kwon
IPC分类号： H04B7/00 , H04B17/00
CPC分类号： H04W52/146 , H04L5/023 , H04L27/2626 , H04W52/10 , H04W52/225 , H04W52/243
摘要： A power controlling device in a mobile communication system, and a method thereof. A base station calculates an average interference of N previous frames, and broadcasts the average interference to subscriber stations. The subscriber stations determine transmission power based on the average interference. Noise and Interference (NI) of frames within a section corresponding to a setting size is calculated (the frames may include a current frame) so an estimated interference is close to the interference generated in the frame in which the subscriber station actually transmits a signal. In addition, to more precisely estimate the NI, the NI of the current frame is compensated according to a value and is broadcast.
摘要翻译：移动通信系统中的功率控制装置及其方法。基站计算N个先前帧的平均干扰，并且向用户台广播平均干扰。用户台根据平均干扰确定发射功率。计算与设定大小相对应的部分内的帧的噪声和干扰（帧）可以包括当前帧），所以估计的干扰接近在用户站实际发送信号的帧中产生的干扰。另外，为了更准确地估计NI，当前帧的NI根据值进行补偿并被广播。

60. 发明授权

US07746936B2 Method and device for optimizing codebook for quantized precoder by using steepest descent algorithm 有权
标题翻译：使用最陡下降算法优化量化预编码码本的方法和装置
公开(公告)号：US07746936B2
公开(公告)日：2010-06-29
申请号：US11743147
申请日：2007-05-02
申请人： Dong-Seung Kwon , Young-Seog Song , In-Kyeong Choi , Chung-Yong Lee , Myeong-Cheol Shin , Myoung-Seog Kim , Seung-Joon Lee
发明人： Dong-Seung Kwon , Young-Seog Song , In-Kyeong Choi , Chung-Yong Lee , Myeong-Cheol Shin , Myoung-Seog Kim , Seung-Joon Lee
IPC分类号： H04B14/04 , H04L7/02
CPC分类号： H04B7/0658 , H04B7/0634 , H04B7/0639
摘要： In a method for optimizing a codebook including a quantized channel between a base station transmitter and a portable terminal: a) select the codebook to be optimized; b) a steepest descent algorithm is applied to respective codewords of the codebook selected in a), wherein the codewords are transformed so that a correlation between the codewords is minimized, and a function indicating the correlation between the codewords is differentiated and is multiplied by a predetermined step size and is used for a parameter for generating a new codeword in the steepest descent algorithm; c) it is determined whether the codebook including the codewords transformed in b) is optimized; and d) the codebook is stored when it is determined in c) that the codebook is optimized.
摘要翻译：一种用于优化包括基站发射机和便携式终端之间的量化信道的码本的方法：a）选择要优化的码本; b）将最陡下降算法应用于在a）中选择的码本的相应码字，其中对码字进行变换，使得码字之间的相关性最小化，并且指示码字之间的相关性的函数被区分，并乘以用于在最速下降算法中生成新码字的参数; c）确定包括在b）中变换的码字的码本是否被优化; 以及d）当在c）中确定码本被优化时，存储码本。

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