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51. 发明授权

US07940858B2 Apparatus and method for calibration in a communication system 有权
标题翻译：通信系统中的校准装置和方法
公开(公告)号：US07940858B2
公开(公告)日：2011-05-10
申请号：US11635475
申请日：2006-12-07
申请人： Yong-Su Lee , Youn-Ok Park , Young-Jo Bang , Kyung-Yeol Sohn , Jae-Gun Jung
发明人： Yong-Su Lee , Youn-Ok Park , Young-Jo Bang , Kyung-Yeol Sohn , Jae-Gun Jung
IPC分类号： H04L27/00 , H04B7/06
CPC分类号： H01Q1/246 , H01Q3/267 , H04B17/14 , H04L27/2626
摘要： In a calibration apparatus in a communication system, a modulation unit calculates a reference signal by modulating a downlink signal, and a digital Intermediate Frequency (IF) unit converts the reference signal to an intermediate frequency signal. An up-converter converts the intermediate frequency signal to a Radio Frequency (RF) signal, and a down-converter generates a received signal for each of the paths from the RF signal to be transmitted through each path. A calibrator calculates a correction value for each path and a delay value by using the reference signal and the received signal for each path.
摘要翻译：在通信系统中的校准装置中，调制单元通过调制下行链路信号来计算参考信号，并且数字中频（IF）单元将参考信号转换为中频信号。上变频器将中频信号转换成射频（RF）信号，下变频器从RF信号中产生每个路径的接收信号，以通过每个路径传输。校准器通过使用参考信号和每个路径的接收信号来计算每个路径的校正值和延迟值。

52. 发明申请

US20080310318A1 Apparatus and Method For Monitoring Base Station Signal in Communication System Having Multiple Antennas 有权
标题翻译：用于监测具有多个天线的通信系统中的基站信号的装置和方法
公开(公告)号：US20080310318A1
公开(公告)日：2008-12-18
申请号：US12094897
申请日：2006-12-08
申请人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
发明人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
IPC分类号： H04L12/26
CPC分类号： H04W24/00 , H04B17/12 , H04W24/08 , H04W88/08
摘要： In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.
摘要翻译：在具有多个天线的通信系统的基站的信号监视装置中，发送/接收单元通过使用多个天线发送多个发送信号，或处理通过多个天线接收的多个接收信号。射频校准单元校准通过多个天线发射的发射信号，并处理多个发射信号中的至少一个目标发射信号，以便监测至少一个目标发射信号。信号监测单元接收至少一个第一信号或至少一个第二信号，并将所述至少一个第一信号或至少一个第二信号发送给用户设备。所述至少一个第一信号是从所述多个接收信号中的至少一个目标接收信号处理的信号，并且所述至少一个第二信号是通过控制所述射频校准单元从所述至少一个目标发射信号处理的信号。

53. 发明授权

US08098777B2 Signal detection method and receiving apparatus in MIMO system 有权
标题翻译： MIMO系统中的信号检测方法和接收装置
公开(公告)号：US08098777B2
公开(公告)日：2012-01-17
申请号：US11930047
申请日：2007-10-30
申请人： Seung-Jae Bahng , Young-Jo Bang , Youn-Ok Park
发明人： Seung-Jae Bahng , Young-Jo Bang , Youn-Ok Park
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04B7/0413 , H04L1/0656 , H04L25/0204 , H04L25/0246
摘要： The present invention relates to a signal detection method and a receiving apparatus in a multiple input multiple output (MIMO) system. More particularly, the present invention relates to a signal detection device in a MIMO system using a spatial multiplexing (SM) method. In the signal detection method, a channel is estimated and layers are rearranged according to a predetermined layer arrangement rule. QR-decomposition is performed by using a rearranged system model, all constellation points in a symbol of a layer having the lowest reliability are considered, and symbols are detected by using a sequential interference elimination method.
摘要翻译：本发明涉及多输入多输出（MIMO）系统中的信号检测方法和接收装置。更具体地，本发明涉及使用空间复用（SM）方法的MIMO系统中的信号检测装置。在信号检测方法中，估计信道并根据预定层布置规则重新布置层。通过使用重排系统模型进行QR分解，考虑具有最低可靠性的层的符号中的所有星座点，并且通过使用顺序干扰消除方法来检测符号。

54. 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。

55. 发明授权

US07813435B2 Carrier allocation method in OFDM system and transmitting apparatus using the method 有权
标题翻译： OFDM系统中的载波分配方法和使用该方法的发射装置
公开(公告)号：US07813435B2
公开(公告)日：2010-10-12
申请号：US11722028
申请日：2005-05-11
申请人： Hyeong-Sook Park , Youn-Ok Park
发明人： Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04K1/10
CPC分类号： H04L27/2608
摘要： The present invention relates to a method for allocating subcarriers in an orthogonal frequency division multiplex (OFDM) system, and a transmitter thereof. In the OFDM system according to an exemplary embodiment of the present invention, the subcarrier allocation is performed in the buffer (10) before a modulation mapping operation is performed according to a modulation method such that the delay may not be generated in the subchannel formed on the symbol axis. The delay corresponding to the symbols is prevented without using any additional hardware for eliminating the delay generated when the subcarriers are allocated to the subchannel formed on the symbol axis.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）系统中分配子载波的方法及其发射机。在根据本发明的示例性实施例的OFDM系统中，在根据调制方法执行调制映射操作之前，在缓冲器（10）中执行子载波分配，使得可以在形成的子信道中不产生延迟符号轴。防止对应于符号的延迟，而不使用任何额外的硬件来消除当子载波被分配到在符号轴上形成的子信道时产生的延迟。

56. 发明申请

US20100216459A1 CELL SEARCH DEVICE OF CELLULAR SYSTEM USING OFDMA SCHEME AND METHOD THEREOF 有权
标题翻译：使用OFDMA方案的细胞系统的细胞搜索装置及其方法
公开(公告)号：US20100216459A1
公开(公告)日：2010-08-26
申请号：US11721153
申请日：2005-11-30
申请人： Chang-Wahn Yu , Youn-Ok Park
发明人： Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04W36/00
CPC分类号： H04J11/0069 , H04J13/0022
摘要： A cell search device using an appropriate preamble for a downlink of a cellular system using an orthogonal frequency division multiplexing access (OFDMA) scheme and a method thereof is disclosed. The cell search device for a terminal of a cellular system using an orthogonal frequency division multiplexing access scheme includes when the terminal receives a preamble symbol from a base station, a PN code and phase delay estimating unit for generating a code with the received preamble symbol and a combination of a PN code and a Walsh code, calculating a correlation value therebetween using a differential demodulation for the codes to detect the PN code, a plurality of Walsh codes, and an error of a time delay, and estimating a component of a phase delay for the time delay; and a Walsh code estimating unit for minimizing the influence of the time error using the phase delay and the PN code information obtained by the differential demodulation of the PN code and phase delay estimating unit and estimating a Walsh code for the corresponding cell by synchronization demodulation.
摘要翻译：公开了一种使用正交频分复用接入（OFDMA）方案的蜂窝系统的下行链路的适当前导码的小区搜索装置及其方法。用于使用正交频分复用接入方式的蜂窝系统的终端的小区搜索装置包括当终端从基站接收到前导码符号时，PN码和相位延迟估计单元用于产生具有接收到的前导码符号的码， PN码和沃尔什码的组合，使用用于检测PN码的代码的差分解调，多个沃尔什码和时间延迟的误差来计算其间的相关值，并且估计相位的分量延迟延迟; 以及沃尔什码估计单元，用于使用相位延迟和通过PN码和相位延迟估计单元的差分解调获得的PN码信息来最小化时间误差的影响，并通过同步解调估计相应小区的沃尔什码。

57. 发明授权

US07782989B2 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：US07782989B2
公开(公告)日：2010-08-24
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： H04L7/00
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。

58. 发明授权

US08275053B2 Apparatus and method of estimating channel based on channel delay spread in mobile communication system 有权
标题翻译：基于移动通信系统中的信道延迟扩展估计信道的装置和方法
公开(公告)号：US08275053B2
公开(公告)日：2012-09-25
申请号：US11931188
申请日：2007-10-31
申请人： Young-Jo Bang , Kyung-Yeol Sohn , Youn-Ok Park
发明人： Young-Jo Bang , Kyung-Yeol Sohn , Youn-Ok Park
IPC分类号： H04L27/28
CPC分类号： H04L25/0236 , H04L5/0007 , H04L5/0048 , H04L25/0222 , H04L27/261
摘要： The present invention relates to an apparatus and method of estimating a channel based on a channel delay spread in a mobile communication system. Pilot subcarriers are inserted between data subcarriers at predetermined intervals to estimate a channel at locations of the pilot subcarriers. An approximate channel delay spread value is estimated by using an autocorrelation value of a pilot signal. Then, a channel for data subcarriers between the pilot subcarriers is estimated by using a Wiener finite impulse response (FIR) filter that has a separate coefficient according to the estimated delay spread value. Accordingly, by changing the Wiener FIR filter coefficient according to the delay spread value of the channel, it is possible to estimate the channel so as to be adaptive for a change of the channel over time. Since the filter coefficients, which are calculated in advance, are used, it is possible to reduce the amount of calculation required when calculating the filter coefficients. As a result, an apparatus for estimating a channel can be easily achieved.
摘要翻译：本发明涉及一种基于移动通信系统中的信道延迟扩展来估计信道的装置和方法。导频子载波以预定间隔插入数据子载波之间，以估计导频子载波位置处的信道。通过使用导频信号的自相关值来估计近似信道延迟扩展值。然后，通过使用根据估计的延迟扩展值具有单独系数的维纳有限脉冲响应（FIR）滤波器来估计导频子载波之间的数据子载波的信道。因此，通过根据信道的延迟扩展值改变维纳FIR滤波器系数，可以估计信道，以适应随时间变化的信道。由于使用预先计算的滤波器系数，因此可以减少计算滤波器系数时所需的计算量。结果，可以容易地实现用于估计通道的装置。

59. 发明授权

US08184606B2 Apparatus and method for monitoring base station signal in communication system having multiple antennas 有权
标题翻译：用于监测具有多个天线的通信系统中的基站信号的装置和方法
公开(公告)号：US08184606B2
公开(公告)日：2012-05-22
申请号：US12094897
申请日：2006-12-08
申请人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
发明人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
IPC分类号： H04H20/67
CPC分类号： H04W24/00 , H04B17/12 , H04W24/08 , H04W88/08
摘要： In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.
摘要翻译：在具有多个天线的通信系统的基站的信号监视装置中，发送/接收单元通过使用多个天线发送多个发送信号，或处理通过多个天线接收的多个接收信号。射频校准单元校准通过多个天线发射的发射信号，并处理多个发射信号中的至少一个目标发射信号，以便监测至少一个目标发射信号。信号监测单元接收至少一个第一信号或至少一个第二信号，并将所述至少一个第一信号或至少一个第二信号发送给用户设备。所述至少一个第一信号是从所述多个接收信号中的至少一个目标接收信号处理的信号，并且所述至少一个第二信号是通过控制所述射频校准单元从所述至少一个目标发射信号处理的信号。

60. 发明授权

US08103273B2 Cell search device of cellular system using OFDMA scheme and method thereof 有权
标题翻译：使用OFDMA方案的蜂窝系统的小区搜索设备及其方法
公开(公告)号：US08103273B2
公开(公告)日：2012-01-24
申请号：US11721153
申请日：2005-11-30
申请人： Chang-Wahn Yu , Youn-Ok Park
发明人： Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04W36/00
CPC分类号： H04J11/0069 , H04J13/0022
摘要： A cell search device using an appropriate preamble for a downlink of a cellular system using an orthogonal frequency division multiplexing access (OFDMA) scheme and a method thereof is disclosed. The cell search device for a terminal of a cellular system using an orthogonal frequency division multiplexing access scheme includes when the terminal receives a preamble symbol from a base station, a PN code and phase delay estimating unit for generating a code with the received preamble symbol and a combination of a PN code and a Walsh code, calculating a correlation value therebetween using a differential demodulation for the codes to detect the PN code, a plurality of Walsh codes, and an error of a time delay, and estimating a component of a phase delay for the time delay; and a Walsh code estimating unit for minimizing the influence of the time error using the phase delay and the PN code information obtained by the differential demodulation of the PN code and phase delay estimating unit and estimating a Walsh code for the corresponding cell by synchronization demodulation.
摘要翻译：公开了一种使用正交频分复用接入（OFDMA）方案的蜂窝系统的下行链路的适当前导码的小区搜索装置及其方法。用于使用正交频分复用接入方式的蜂窝系统的终端的小区搜索装置包括当终端从基站接收到前导码符号时，PN码和相位延迟估计单元用于产生具有接收到的前导码符号的码， PN码和沃尔什码的组合，使用用于检测PN码的代码的差分解调，多个沃尔什码和时间延迟的误差来计算其间的相关值，并且估计相位的分量延迟延迟; 以及沃尔什码估计单元，用于使用相位延迟和通过PN码和相位延迟估计单元的差分解调获得的PN码信息来最小化时间误差的影响，并通过同步解调估计相应小区的沃尔什码。

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