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    Apparatus and method of compensating for frequency offset in OFDMA system
    1.
    发明授权
    Apparatus and method of compensating for frequency offset in OFDMA system 有权
    在OFDMA系统中补偿频偏的装置和方法

    公开(公告)号：US08005182B2

    公开(公告)日：2011-08-23

    申请号：US11925686

    申请日：2007-10-26

    申请人： Hyeong-Sook Park ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Youn-Ok Park

    发明人： Hyeong-Sook Park ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Youn-Ok Park

    IPC分类号： H03D3/24

    CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2679

    摘要： The present invention relates to an apparatus and method of compensating for a frequency offset in an orthogonal frequency division multiple access system that is capable of efficiently estimating and compensating for the frequency offset. A receiver of the orthogonal frequency division multiple access system can individually estimate a fractional frequency offset and an integer frequency offset by using a downlink preamble signal. Further, the receiver can compensate for the frequency offset by adding the integer frequency offset once after completely compensating for the fractional frequency offset. Therefore, it is possible to efficiently compensate for the frequency offset.

    摘要翻译： 本发明涉及一种能够有效地估计和补偿频偏的正交频分多址系统中的频偏的补偿装置和方法。 正交频分多址系统的接收机可以通过使用下行链路前导码信号单独地估计分数频率偏移和整数频率偏移。 此外，接收机可以通过在完全补偿分数频率偏移之后加上整数频率偏移一次来补偿频率偏移。 因此，可以有效地补偿频率偏移。

    Downlink beamforming apparatus in OFDMA system and transmission apparatus including the same
    2.
    发明授权
    Downlink beamforming apparatus in OFDMA system and transmission apparatus including the same 有权
    OFDMA系统中的下行波束成形装置及包括该下行链路波束成形装置的发送装置

    公开(公告)号：US07646749B2

    公开(公告)日：2010-01-12

    申请号：US11636812

    申请日：2006-12-11

    申请人： Hyeong-Sook Park ,  Kyung-Yeol Sohn ,  Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

    发明人： Hyeong-Sook Park ,  Kyung-Yeol Sohn ,  Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

    IPC分类号： H04Q7/00

    CPC分类号： H04B7/0617 ,  H04L5/023 ,  H04L27/2608 ,  Y02D70/142 ,  Y02D70/444

    摘要： A downlink beamforming apparatus and a transmission apparatus including the same includes a subcarrier based user identifier for dividing subcarriers according to users, a beamforming weight buffer for storing first beamforming weights for the subcarriers by each of transmitting antennas, an interpolator for outputting second beamforming weights for each transmitting antenna by interpolating the first beamforming weights, and a signal reproducer for reproducing the signal for each transmitting antenna. Subcarriers are allocated to the signal by each user; and a complex multiplier multiplies the signal for each transmitting antenna by the second beamforming weights.

    摘要翻译： 下行链路波束成形装置及其发送装置包括：用于根据用户分割子载波的基于子载波的用户标识符;波束形成权重缓冲器，用于存储每个发送天线的子载波的第一波束形成权重;内插器，用于输出第二波束形成权重 通过内插第一波束形成权重的每个发射天线，以及用于再现每个发射天线的信号的信号再现器。 子载波由每个用户分配给信号; 并且复数乘法器将每个发射天线的信号乘以第二波束形成权重。

    Downlink beamforming apparatus in OFDMA system and transmission apparatus including the same
    3.
    发明申请
    Downlink beamforming apparatus in OFDMA system and transmission apparatus including the same 有权
    OFDMA系统中的下行波束成形装置及包括该下行链路波束成形装置的发送装置

    公开(公告)号：US20070135052A1

    公开(公告)日：2007-06-14

    申请号：US11636812

    申请日：2006-12-11

    申请人： Hyeong-Sook Park ,  Kyung-Yeol Sohn ,  Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

    发明人： Hyeong-Sook Park ,  Kyung-Yeol Sohn ,  Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

    IPC分类号： H04B1/00

    CPC分类号： H04B7/0617 ,  H04L5/023 ,  H04L27/2608 ,  Y02D70/142 ,  Y02D70/444

    摘要： A downlink beamforming apparatus and a transmission apparatus including the same includes a subcarrier based user identifier for dividing subcarriers according to users, a beamforming weight buffer for storing first beamforming weights for the subcarriers by each of transmitting antennas, an interpolator for outputting second beamforming weights for each transmitting antenna by interpolating the first beamforming weights, and a signal reproducer for reproducing the signal for each transmitting antenna. Subcarriers are allocated to the signal by each user; and a complex multiplier multiplies the signal for each transmitting antenna by the second beamforming weights.

    摘要翻译： 下行链路波束成形装置及其发送装置包括：用于根据用户分割子载波的基于子载波的用户标识符;波束形成权重缓冲器，用于存储每个发送天线的子载波的第一波束形成权重;内插器，用于输出第二波束形成权重 通过内插第一波束形成权重的每个发射天线，以及用于再现每个发射天线的信号的信号再现器。 子载波由每个用户分配给信号; 并且复数乘法器将每个发射天线的信号乘以第二波束形成权重。

    Apparatus and method for processing ranging channel of communication system
    4.
    发明授权
    Apparatus and method for processing ranging channel of communication system 有权
    通信系统测距信道处理装置及方法

    公开(公告)号：US08199738B2

    公开(公告)日：2012-06-12

    申请号：US11636814

    申请日：2006-12-11

    申请人： Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    发明人： Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    IPC分类号： H04J1/00

    CPC分类号： H04B17/318

    摘要： Disclosed herein is a base station that extracts a ranging channel signal from a received signal partially correlates each of a plurality of ranging channel signals and each of ranging codes according to ranging modes, and selects a ranging channel signal greater than a first threshold value, the plurality of ranging channel signals being signals according to plurality of time delays of a ranging channel signal. In addition, the base station correlates each of the selected ranging channel signal and each of corresponding ranging code, selects a ranging channel signal having the maximum correlation value, and estimates receiving power by using a time delay corresponding to the selected ranging channel signal.

    摘要翻译： 本文公开了一种从接收信号中提取测距信道信号的基站，根据测距模式对多个测距信道信号和测距码中的每一个进行部分相关，并选择大于第一阈值的测距信道信号， 多个测距信道信号是根据测距信道信号的多个时间延迟的信号。 此外，基站将所选择的测距信道信号和每个对应的测距码相关，选择具有最大相关值的测距信道信号，并且通过使用与所选择的测距信道信号相对应的时间延迟来估计接收功率。

    Apparatus and method of acquiring initial synchronization of terminal in mobile communication system
    5.
    发明授权
    Apparatus and method of acquiring initial synchronization of terminal in mobile communication system 有权
    在移动通信系统中获取终端初始同步的装置和方法

    公开(公告)号：US07986757B2

    公开(公告)日：2011-07-26

    申请号：US11923622

    申请日：2007-10-24

    申请人： Hyeong-Sook Park ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Youn-Ok Park

    发明人： Hyeong-Sook Park ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Youn-Ok Park

    IPC分类号： H04L7/00

    CPC分类号： H04L7/042 ,  H04B1/7075 ,  H04L27/261 ,  H04L27/2655 ,  H04L27/2675

    摘要： The present invention relates to an apparatus and method of acquiring initial synchronization of a terminal in a mobile communication system. According to an exemplary embodiment of the present invention, one or more auto-correlation values of a preamble constituting a signal that is received from a base station are calculated. Averages of the calculated auto-correlation values according to samples are calculated, and then a peak value is detected among the calculated values. Then, a cell search is performed on the basis of the detected peak value, and a peak value from the result of the cell search is regularized. Then, the regularized peak value is compared with a predetermined reference value such that it is checked whether synchronization of a signal that has been searched is accurate or not. According to an exemplary embodiment of the present invention, a value obtained by regularizing a result of a cell search is compared with a reference value, and it is checked again whether an accurate start point of a frame is detected or not on the basis of a result of the comparison. Accordingly, false alarm rates can be reduced.

    摘要翻译： 本发明涉及在移动通信系统中获取终端的初始同步的装置和方法。 根据本发明的示例性实施例，计算构成从基站接收的信号的前导码的一个或多个自相关值。 计算根据样本计算的自相关值的平均值，然后在计算值之间检测峰值。 然后，基于检测到的峰值执行小区搜索，并且从小区搜索结果的峰值正规化。 然后，将正则化峰值与预定参考值进行比较，以便检查已搜索的信号的同步是否准确。 根据本发明的示例性实施例，将通过对小区搜索的结果进行规则化而获得的值与参考值进行比较，并且再次检查是否基于a检测到帧的准确起点 比较结果。 因此，可以降低误报率。

    Terminal and method for controlling transmission power
    6.
    发明授权
    Terminal and method for controlling transmission power 有权
    终端和控制传输功率的方法

    公开(公告)号：US07970363B2

    公开(公告)日：2011-06-28

    申请号：US12095275

    申请日：2006-12-08

    申请人： Dae-Ho Kim ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    发明人： Dae-Ho Kim ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    IPC分类号： H01Q11/12 ,  H04K3/00

    CPC分类号： H04W52/10 ,  H04L27/2601 ,  H04W52/245 ,  H04W52/52

    摘要： A terminal of a communication system includes a power amplifier, an open-loop power controller, a gain controller, a modulator, and a digital/analog converter. The power amplifier amplifies transmission power of a transmission signal. The open-loop power controller measures a received signal strength to control the transmission power, and increases a gain of the power amplifier according to the received signal strength. The gain controller sets a power concentration gain and applies the power concentration gain to the transmission signal when the gain of the power amplifier is maximized. The modulator modulates the transmission signal. The digital/analog converter converts an input signal to an analog signal. The gain controller applies the power concentration gain to the trans mission signal modulated by the modulator, and transmits the power concentration gain to the digital/analog converter.

    摘要翻译： 通信系统的终端包括功率放大器，开环功率控制器，增益控制器，调制器和数/模转换器。 功率放大器放大发送信号的发送功率。 开环功率控制器测量接收信号强度以控制发射功率，并根据接收信号强度增加功率放大器的增益。 增益控制器设置功率集中增益，并且当功率放大器的增益最大化时，将功率集中增益应用于传输信号。 调制器调制发送信号。 数字/模拟转换器将输入信号转换为模拟信号。 增益控制器将功率集中增益应用于由调制器调制的传输信号，并将功率集中增益传输到数/模转换器。

    Terminal and Method for Controlling Transmission Power
    7.
    发明申请
    Terminal and Method for Controlling Transmission Power 有权
    终端和控制传输功率的方法

    公开(公告)号：US20080287078A1

    公开(公告)日：2008-11-20

    申请号：US12095275

    申请日：2006-12-08

    申请人： Dae-Ho Kim ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    发明人： Dae-Ho Kim ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    IPC分类号： H04B1/16

    CPC分类号： H04W52/10 ,  H04L27/2601 ,  H04W52/245 ,  H04W52/52

    摘要： A terminal of a communication system includes a power amplifier, an open-loop power controller, a gain controller, a modulator, and a digital/analog converter. The power amplifier amplifies transmission power of a transmission signal. The open-loop power controller measures a received signal strength to control the transmission power, and increases a gain of the power amplifier according to the received signal strength. The gain controller sets a power concentration gain and applies the power concentration gain to the transmission signal when the gain of the power amplifier is maximized. The modulator modulates the transmission signal. The digital/analog converter converts an input signal to an analog signal. The gain controller applies the power concentration gain to the trans mission signal modulated by the modulator, and transmits the power concentration gain to the digital/analog converter.

    摘要翻译： 通信系统的终端包括功率放大器，开环功率控制器，增益控制器，调制器和数/模转换器。 功率放大器放大发送信号的发送功率。 开环功率控制器测量接收信号强度以控制发射功率，并根据接收信号强度增加功率放大器的增益。 增益控制器设置功率集中增益，当功率放大器的增益最大化时，将功率集中增益应用于传输信号。 调制器调制发送信号。 数字/模拟转换器将输入信号转换为模拟信号。 增益控制器将功率集中增益应用于由调制器调制的传输信号，并将功率集中增益传输到数/模转换器。

    Apparatus and method for processing ranging channel of communication system
    8.
    发明申请
    Apparatus and method for processing ranging channel of communication system 有权
    通信系统测距信道处理装置及方法

    公开(公告)号：US20070133460A1

    公开(公告)日：2007-06-14

    申请号：US11636814

    申请日：2006-12-11

    申请人： Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    发明人： Kyung-Yeol Sohn ,  Hyeong-Sook Park ,  Youn-Ok Park

    IPC分类号： H04Q7/00 ,  H04L12/28

    CPC分类号： H04B17/318

    摘要： Disclosed herein is a base station that extracts a ranging channel signal from a received signal partially correlates each of a plurality of ranging channel signals and each of ranging codes according to ranging modes, and selects a ranging channel signal greater than a first threshold value, the plurality of ranging channel signals being signals according to plurality of time delays of a ranging channel signal. In addition, the base station correlates each of the selected ranging channel signal and each of corresponding ranging code, selects a ranging channel signal having the maximum correlation value, and estimates receiving power by using a time delay corresponding to the selected ranging channel signal.

    摘要翻译： 本文公开了一种从接收信号中提取测距信道信号的基站，根据测距模式对多个测距信道信号和测距码中的每一个进行部分相关，并选择大于第一阈值的测距信道信号， 多个测距信道信号是根据测距信道信号的多个时间延迟的信号。 此外，基站将所选择的测距信道信号和每个对应的测距码相关，选择具有最大相关值的测距信道信号，并且通过使用与所选择的测距信道信号相对应的时间延迟来估计接收功率。

    Apparatus and method for calibration in a communication system
    9.
    发明授权
    Apparatus and method for calibration in a communication system 有权
    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。