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    • 1. 发明授权
    • Method of detecting space-time code in mobile communication system with 4 Tx antenna
    • 用4个Tx天线检测移动通信系统中的时空码的方法
    • US07899138B2
    • 2011-03-01
    • US11930013
    • 2007-10-30
    • Young-Jo BangChang-Wahn YuSeung-Jae BahngDae-Ho KimYoun-Ok ParkJee-Hwan AhnII Min Kim
    • Young-Jo BangChang-Wahn YuSeung-Jae BahngDae-Ho KimYoun-Ok ParkJee-Hwan AhnII Min Kim
    • H04L27/06H03D1/00
    • H04L25/03242H04L1/0631
    • 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.
    • 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。
    • 2. 发明申请
    • METHOD OF DETECTING SPACE-TIME CODE IN MOBILE COMMUNICATION SYSTEM WITH 4 Tx ANTENNA
    • 使用4个Tx天线检测移动通信系统中的时间码的方法
    • US20080137781A1
    • 2008-06-12
    • US11930013
    • 2007-10-30
    • Young-Jo BangChang-Wahn YuSeung-Jae BahngDae-Ho KimYoun-Ok ParkJee-Hwan AhnIl Min Kim
    • Young-Jo BangChang-Wahn YuSeung-Jae BahngDae-Ho KimYoun-Ok ParkJee-Hwan AhnIl Min Kim
    • H04L27/06
    • H04L25/03242H04L1/0631
    • 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.
    • 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
    • Apparatus and method for acquiring frame timing in communication system
    • 在通信系统中获取帧定时的装置和方法
    • US20070133728A1
    • 2007-06-14
    • US11636797
    • 2006-12-11
    • Seung-Jae BahngYoun-Ok ParkChang-Wahn YuEon-Young Hong
    • Seung-Jae BahngYoun-Ok ParkChang-Wahn YuEon-Young Hong
    • H04L25/38
    • H04L27/2656H04L27/2676
    • 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.
    • 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。
    • 6. 发明授权
    • Apparatus and method for acquiring frame timing in communication system
    • 在通信系统中获取帧定时的装置和方法
    • US07782989B2
    • 2010-08-24
    • US11636797
    • 2006-12-11
    • Seung-Jae BahngYoun-Ok ParkChang-Wahn YuEon-Young Hong
    • Seung-Jae BahngYoun-Ok ParkChang-Wahn YuEon-Young Hong
    • H04L7/00
    • H04L27/2656H04L27/2676
    • 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.
    • 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。
    • 9. 发明授权
    • Smart antenna beamforming device in communication system and method thereof
    • 通信系统中的智能天线波束成形装置及其方法
    • US07477190B2
    • 2009-01-13
    • US11607270
    • 2006-12-01
    • Young-Jo BangYoung Ho YunChang-Wahn YuHyung Rae ParkYoun-Ok Park
    • Young-Jo BangYoung Ho YunChang-Wahn YuHyung Rae ParkYoun-Ok Park
    • H01Q3/00G01S7/36H04J1/00
    • H04B7/086G01S3/74
    • 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.
    • 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。
    • 10. 发明申请
    • Smart antenna beamforming device in communication system and method thereof
    • 通信系统中的智能天线波束成形装置及其方法
    • US20070164902A1
    • 2007-07-19
    • US11607270
    • 2006-12-01
    • Young-Jo BangYoung-Ho YunChang-Wahn YuHyung ParkYoun-Ok Park
    • Young-Jo BangYoung-Ho YunChang-Wahn YuHyung ParkYoun-Ok Park
    • H01Q3/00G01S3/16
    • H04B7/086G01S3/74
    • 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.
    • 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。