公开(公告)号：US08054909B2

公开(公告)日：2011-11-08

申请号：US12141539

申请日：2008-06-18

申请人： Seung Jae Bahng ,  Jae Kwon Kim ,  Hoon Heo ,  Hyun Myung Wu ,  Youn-Ok Park ,  Young Jo Bang ,  Hyeong Sook Park ,  Hoon Lee ,  Young Ha Lee ,  Jung Pil Choi

发明人： Seung Jae Bahng ,  Jae Kwon Kim ,  Hoon Heo ,  Hyun Myung Wu ,  Youn-Ok Park ,  Young Jo Bang ,  Hyeong Sook Park ,  Hoon Lee ,  Young Ha Lee ,  Jung Pil Choi

IPC分类号： H04L27/00 ,  G06Q30/00

CPC分类号： H04L25/067 ,  H04L25/03203 ,  H04L2025/03426

摘要： The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected.

摘要翻译： 本发明涉及检测候选向量的方法和使用其的发送符号的检测方法。 根据本发明的实施例，在使用空间复用（SM）的多输入多输出（MIMO）系统中，接收机选择与多个重排层中位于最后一行的层相对应的候选向量，并且顺次排列 每个所选候选向量的下一层的星座点。 然后，从分级星座点中选择多个任意星座点，计算任意星座点的累积成本，并且与具有最小累积成本的星座点对应地选择候选矢量。 然后，代替选择为候选矢量的星座点，选择新的任意星座点，将所选择的任意星座点的累积成本与其他任意星座点的累积成本进行比较，并选择另一候选矢量。

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。

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。

公开(公告)号：US08406320B2

公开(公告)日：2013-03-26

申请号：US11721156

申请日：2005-10-26

申请人： Hyeong-Sook Park ,  Youn-Ok Park

发明人： Hyeong-Sook Park ,  Youn-Ok Park

IPC分类号： H04L27/28

CPC分类号： H04L27/2624

摘要： The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.

摘要翻译： 本发明涉及一种用于降低正交频分多路复用接入（OFDMA）系统的发射机中的发送信号的高峰值与平均功率比（PAPR）的数字削波方法。 在该方法中，a）要被数字剪切的传输信号被划分成实部和虚部，b）实部和虚部信号的大小被分成多个削波电平，c）通过比较来分别传输发送信号 具有多个限幅电平的实部和虚部信号同时允许相位误差。 在c）中，使用多个比较器来分别比​​较复数传输信号的实部和虚部与多个限幅电平。

公开(公告)号：US20100046662A1

公开(公告)日：2010-02-25

申请号：US11721156

申请日：2005-10-26

申请人： Hyeong-Sook Park ,  Youn-Ok Park

发明人： Hyeong-Sook Park ,  Youn-Ok Park

IPC分类号： H04L27/00

CPC分类号： H04L27/2624

摘要： The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.

摘要翻译： 本发明涉及一种用于降低正交频分多路复用接入（OFDMA）系统的发射机中的发送信号的高峰值与平均功率比（PAPR）的数字削波方法。 在该方法中，a）要被数字剪切的传输信号被划分成实部和虚部，b）实部和虚部信号的大小被分成多个削波电平，c）通过比较来分别传输发送信号 具有多个限幅电平的实部和虚部信号同时允许相位误差。 在c）中，使用多个比较器来分别比​​较复数传输信号的实部和虚部与多个限幅电平。

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。

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。

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。

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。

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。