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1. 发明申请

US20070164902A1 Smart antenna beamforming device in communication system and method thereof 有权
标题翻译：通信系统中的智能天线波束成形装置及其方法
公开(公告)号：US20070164902A1
公开(公告)日：2007-07-19
申请号：US11607270
申请日：2006-12-01
申请人： Young-Jo Bang , Young-Ho Yun , Chang-Wahn Yu , Hyung Park , Youn-Ok Park
发明人： Young-Jo Bang , Young-Ho Yun , Chang-Wahn Yu , Hyung Park , Youn-Ok Park
IPC分类号： H01Q3/00 , G01S3/16
CPC分类号： H04B7/086 , G01S3/74
摘要： A beamforming device includes a Direction Of Arrival (DOA) estimation unit for estimating DOAs of the received signals based on a data subcarrier matrix; a pre-spatial filtering unit for using the estimated DOA, performing a filtering operation for the data subcarrier matrix, and generating filtering matrixes; a signal identification unit for using a data sequence, identifying original and interference signals, and generating the DOAs of the original and interference signals; a spatial filtering unit for generating an interference-plus-noise covariance matrix by using the DOA of the interference signal, eliminating the interference signal by using the covariance matrix and the DOA of the original signal, and forming final beams for the original signal; and a channel estimating and signal combining unit for performing a maximal ratio combining operation so that the final beams are combined as one combined final beam.
摘要翻译：波束形成装置包括：基于数据子载波矩阵估计接收信号的DOA的到达方向估计单元; 用于使用所估计的DOA的预空间滤波单元，对所述数据子载波矩阵执行滤波操作，以及生成滤波矩阵; 信号识别单元，用于使用数据序列，识别原始和干扰信号，以及生成原始和干扰信号的DOA; 空间滤波单元，用于通过使用干扰信号的DOA产生干扰加噪声协方差矩阵，通过使用原始信号的协方差矩阵和DOA消除干扰信号，并且为原始信号形成最终的波束; 以及信道估计和信号组合单元，用于执行最大比组合操作，使得最终光束被组合为一个组合的最终光束。

2. 发明授权

US07477190B2 Smart antenna beamforming device in communication system and method thereof 有权
标题翻译：通信系统中的智能天线波束成形装置及其方法
公开(公告)号：US07477190B2
公开(公告)日：2009-01-13
申请号：US11607270
申请日：2006-12-01
申请人： Young-Jo Bang , Young Ho Yun , Chang-Wahn Yu , Hyung Rae Park , Youn-Ok Park
发明人： Young-Jo Bang , Young Ho Yun , Chang-Wahn Yu , Hyung Rae Park , Youn-Ok Park
IPC分类号： H01Q3/00 , G01S7/36 , H04J1/00
CPC分类号： H04B7/086 , G01S3/74
摘要： A beamforming device includes a Direction Of Arrival (DOA) estimation unit for estimating DOAs of the received signals based on a data subcarrier matrix; a pre-spatial filtering unit for using the estimated DOA, performing a filtering operation for the data subcarrier matrix, and generating filtering matrixes; a signal identification unit for using a data sequence, identifying original and interference signals, and generating the DOAs of the original and interference signals; a spatial filtering unit for generating an interference-plus-noise covariance matrix by using the DOA of the interference signal, eliminating the interference signal by using the covariance matrix and the DOA of the original signal, and forming final beams for the original signal; and a channel estimating and signal combining unit for performing a maximal ratio combining operation so that the final beams are combined as one combined final beam.
摘要翻译：波束形成装置包括：基于数据子载波矩阵估计接收信号的DOA的到达方向估计单元; 用于使用所估计的DOA的预空间滤波单元，对所述数据子载波矩阵执行滤波操作，以及生成滤波矩阵; 信号识别单元，用于使用数据序列，识别原始和干扰信号，以及生成原始和干扰信号的DOA; 空间滤波单元，用于通过使用干扰信号的DOA产生干扰加噪声协方差矩阵，通过使用原始信号的协方差矩阵和DOA消除干扰信号，并且为原始信号形成最终的波束; 以及信道估计和信号组合单元，用于执行最大比组合操作，使得最终光束被组合为一个组合的最终光束。

3. 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。

4. 发明授权

US07899138B2 Method of detecting space-time code in mobile communication system with 4 Tx antenna 有权
标题翻译：用4个Tx天线检测移动通信系统中的时空码的方法
公开(公告)号：US07899138B2
公开(公告)日：2011-03-01
申请号：US11930013
申请日：2007-10-30
申请人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , II Min Kim
发明人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , II Min Kim
IPC分类号： H04L27/06 , H03D1/00
CPC分类号： H04L25/03242 , H04L1/0631
摘要： The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.
摘要翻译：本发明涉及一种在移动通信系统中检测时空码的方法。当检测到多个发射天线的时空码B时，通常通过使用矩阵B的特定结构计算的ML（最大似然度）度量被定义为新的ML度量，通过减少 ML度量。执行两个相关球体解码处理，并且计算解码结果的交点，并且从ML度量检测信号。因此，由于通过使用新定义的ML度量来执行多个发送天线的空时码B的检测，所以可以减少计算出的矩阵的量，并且可以通过执行两个相关球体解码来减少计算量过程。此外，由于符号的检测顺序根据通道情况而改变，因此可以提高系统的性能。

5. 发明申请

US20080137781A1 METHOD OF DETECTING SPACE-TIME CODE IN MOBILE COMMUNICATION SYSTEM WITH 4 Tx ANTENNA 有权
标题翻译：使用4个Tx天线检测移动通信系统中的时间码的方法
公开(公告)号：US20080137781A1
公开(公告)日：2008-06-12
申请号：US11930013
申请日：2007-10-30
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： H04L27/06
CPC分类号： H04L25/03242 , H04L1/0631
摘要： The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.
摘要翻译：本发明涉及一种在移动通信系统中检测时空码的方法。当检测到多个发射天线的时空码B时，通常通过使用矩阵B的特定结构计算的ML（最大似然度）度量被定义为新的ML度量，通过减少 ML度量。执行两个相关球体解码处理，并且计算解码结果的交点，并且从ML度量检测信号。因此，由于通过使用新定义的ML度量来执行多个发送天线的空时码B的检测，所以可以减少计算出的矩阵的量，并且可以通过执行两个相关球体解码来减少计算量过程。此外，由于符号的检测顺序根据通道情况而改变，因此可以提高系统的性能。

6. 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。

7. 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。

8. 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。

9. 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。

10. 发明申请

US20070133728A1 Apparatus and method for acquiring frame timing in communication system 有权
标题翻译：在通信系统中获取帧定时的装置和方法
公开(公告)号：US20070133728A1
公开(公告)日：2007-06-14
申请号：US11636797
申请日：2006-12-11
申请人： Seung-Jae Bahng , Youn-Ok Park , Chang-Wahn Yu , Eon-Young Hong
发明人： Seung-Jae Bahng , Youn-Ok Park , Chang-Wahn Yu , Eon-Young Hong
IPC分类号： H04L25/38
CPC分类号： H04L27/2656 , H04L27/2676
摘要： Disclosed is an apparatus for acquiring initial frame timing in a communication system having a normalizer that calculates a normalized window power from powers of samples of received signal during a monitoring period, a cross power calculator that calculates a window cross power from cross powers of the samples during the monitoring period, and each cross power corresponds to multiplication of two of the samples, a divider that divides the window cross power by the normalized window power and outputs a metric for a sample corresponding to the monitoring period, and a peak-value detector that searches a sample having the maximum value among metrics for the samples of the received signals during a predetermined period, and the metrics are calculated by shifting the monitoring period, with a sample next to the sample searched by the peak-value detector being determined as a starting point of a frame.
摘要翻译：公开了一种用于在具有归一化器的通信系统中获取初始帧定时的装置，该归一化器根据监视期间的接收信号的采样功率计算归一化窗功率;交叉功率计算器，其从样本的交叉功率计算窗口交叉功率在监视期间，并且每个交叉功率对应于两个样本的乘法，分频器将窗口交叉功率除以归一化窗功率，并输出对应于监视周期的样本的度量，以及峰值检测器在预定时间段内搜索具有接收信号样本的度量中的最大值的样本，并且通过将监测周期移位，通过峰值检测器搜索的样本旁边的样本被确定为一个框架的起点。

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