公开(公告)号：US20100135438A1

公开(公告)日：2010-06-03

申请号：US12627506

申请日：2009-11-30

申请人： Young Jo BANG ,  Hyeong Sook PARK ,  Jun-Woo KIM ,  Kyung Yeol SOHN ,  Chang Wahn YU ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

发明人： Young Jo BANG ,  Hyeong Sook PARK ,  Jun-Woo KIM ,  Kyung Yeol SOHN ,  Chang Wahn YU ,  Youn Ok PARK ,  Jee Hwan AHN ,  Il Min KIM

IPC分类号： H04L27/06

CPC分类号： H04L25/067 ,  H04B7/0413

摘要： Disclosed is a method of detecting signals at a receiver of a communication system with a multiple input multiple output antenna. With the signal detection method, a square of the distance between a received signal vector and a channel status-considered transmission symbol vector is calculated first, and the square of the distance is then classified into first and second components. The first component is minimized to calculate a plurality of first soft symbol estimates. A solution set of the first component is calculated on the basis of the plurality of first soft symbol estimates. The second component is minimized to calculate a plurality of second soft symbol estimates. A solution set of the second component is calculated on the basis of the plurality of second soft symbol estimates. A final solution set is calculated by doing the sum of the first component solution set and the second component solution.

摘要翻译： 公开了一种在具有多输入多输出天线的通信系统的接收机处检测信号的方法。 利用信号检测方法，首先计算接收信号矢量和通道状态考虑的发送符号向量之间的距离的平方，然后将距离的平方分成第一和第二分量。 将第一分量最小化以计算多个第一软符号估计。 基于多个第一软符号估计来计算第一分量的解集合。 将第二分量最小化以计算多个第二软符号估计。 基于多个第二软符号估计来计算第二分量的解集合。 通过执行第一分量解集合和第二分量解的和来计算最终解集。

公开(公告)号：US20080137768A1

公开(公告)日：2008-06-12

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： H04L23/02

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：US20080144756A1

公开(公告)日：2008-06-19

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： H04L7/02

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：US20110286500A1

公开(公告)日：2011-11-24

申请号：US13113549

申请日：2011-05-23

申请人： Jun-Woo KIM ,  Young Jo Bang ,  Byung-Han Ryu ,  Hyeong Jun Park ,  Youn Ok Park ,  Jee Hwan Ahn

发明人： Jun-Woo KIM ,  Young Jo Bang ,  Byung-Han Ryu ,  Hyeong Jun Park ,  Youn Ok Park ,  Jee Hwan Ahn

IPC分类号： H04B3/36

CPC分类号： H04W56/0085 ,  H04B7/15 ,  H04B7/155 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2671 ,  H04L27/2676

摘要： A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater.

摘要翻译： 无线电中继器的同步方法包括：使用第一信号，第二信号和包括第一信号和第二信号的接收信号，以计算第一信号和第二信号的相关值; 使用第一信号相关值，第二信号相关值和接收信号的功率值来输出归一化相关值; 减去第一信号的归一化相关值和第二信号的归一化相关值; 以及基于所述减法结果检测所述第二信号的开始间隔，并输出同步信号以同步所述无线电中继器。

公开(公告)号：US20180279245A1

公开(公告)日：2018-09-27

申请号：US12906496

申请日：2010-10-18

申请人： Chang Wahn YU ,  Youn Ok PARK ,  Chong Hyun LEE ,  Jun-Woo KIM ,  Seungjae BAHNG ,  Byung-Han RYU ,  Jung Pil CHOI ,  Young Jo BANG

发明人： Chang Wahn YU ,  Youn Ok PARK ,  Chong Hyun LEE ,  Jun-Woo KIM ,  Seungjae BAHNG ,  Byung-Han RYU ,  Jung Pil CHOI ,  Young Jo BANG

IPC分类号： H04W56/00

CPC分类号： H04W56/004 ,  H04W56/0055

摘要： An apparatus and method for detecting synchronization and signals using block data processing in a receiving system are provided. To process an input signal, a cumulative matrix is obtained from an input vector signal for each frame generated from the signal. A primary eigenvector is extracted from the cumulative matrix, and the maximum value of a correlation vector is calculated from the extracted primary eigenvector. A time delay is detected by comparing the calculated maximum value of the correlation vector with a first threshold value, and a delay correlation vector is calculated from the detected time delay. Finally, synchronization and signals are detected by comparing the calculated delay correlation vector with a second threshold value.

公开(公告)号：US20080119152A1

公开(公告)日：2008-05-22

申请号：US11925726

申请日：2007-10-26

申请人： Jun-Woo KIM ,  Hyeong-Sook PARK ,  Youn-Ok PARK

发明人： Jun-Woo KIM ,  Hyeong-Sook PARK ,  Youn-Ok PARK

IPC分类号： H03G3/20 ,  H04B1/06 ,  H04B7/00

CPC分类号： H03G3/3052

摘要： The present invention relates to an automatic gain control apparatus and method in a mobile communication system. According to the automatic gain control apparatus of an embodiment of the invention, when downlink signals include both directional beam signals and beam signals traveling in all directions due to the antenna system, different reception gain reference values are used according to whether downlink signals including only the beam signals traveling in all directions are received or downlink signals including the directional beam signals are received, thereby controlling the gain of the received signal. When the downlink signals including the directional beam signals are received, the automatic gain control apparatus can appropriately control the gain of the received signal on the basis of the directional beam signals to prevent saturation of the received signal. Further, in a place where the channel condition between the terminal and the base station is bad, such as the boundaries between the cells, the reception gain is controlled on the basis of the reception gain reference value that is set in correspondence with the beam signal traveling in all directions, which makes it possible to reduce the loss of a signal-to-noise ratio (SNR).

摘要翻译： 本发明涉及移动通信系统中的自动增益控制装置和方法。 根据本发明的实施例的自动增益控制装置，由于天线系统，当下行信号包括定向波束信号和波导信号在所有方向上行进时，根据是否包括仅仅 接收到在各个方向上行进的波束信号，或者接收包括定向波束信号的下行链路信号，从而控制接收信号的增益。 当接收到包括定向波束信号的下行链路信号时，自动增益控制装置可以根据定向波束信号适当地控制接收信号的增益，以防止接收信号的饱和。 此外，在终端和基站之间的信道状况（诸如小区之间的边界）不良的地方，基于与波束信号相对应地设置的接收增益参考值来控制接收增益 在各个方向上行进，从而可以减少信噪比（SNR）的损失。

公开(公告)号：US20090141786A1

公开(公告)日：2009-06-04

申请号：US12177511

申请日：2008-07-22

申请人： Hyeong Sook PARK ,  Jun-Woo KIM ,  Eon Young HONG ,  Youn Ok PARK

发明人： Hyeong Sook PARK ,  Jun-Woo KIM ,  Eon Young HONG ,  Youn Ok PARK

IPC分类号： H04B17/00 ,  H04L27/26

CPC分类号： H04L27/2647 ,  H04B17/336 ,  H04L27/2662

摘要： The present invention relates an apparatus and method of estimating a signal-to-noise ratio (SNR) of a received signal when the received signal has a timing offset. An apparatus for estimating a signal-to-noise ratio (SNR) according to an exemplary embodiment of the present invention includes a fast Fourier transform (FFT) unit that performs a fast Fourier transform on a received signal to convert the received signal into a frequency domain signal; a preamble selector that extracts a preamble from the frequency domain signal; a correlator that correlates the preamble to a preamble reference signal generated by a receiver to calculate a correlation value; an entire power estimator that calculates entire power; a noise power estimator that applies a differential demodulation method to the correlation value to remove a timing offset and calculate noise power; and an estimating unit that uses the entire power and the noise power to estimate the signal-to-noise ratio (SNR).

摘要翻译： 本发明涉及一种当接收信号具有定时偏移量时估计接收信号的信噪比（SNR）的装置和方法。 根据本发明的示例性实施例的用于估计信噪比（SNR）的装置包括对接收信号执行快速傅里叶变换的快速傅里叶变换（FFT）单元，以将接收到的信号转换成频率 域信号 前导码选择器，从所述频域信号中提取前同步码; 相关器，其将所述前导码与由接收器生成的前导码参考信号相关联，以计算相关值; 整个功率估计器，用于计算整个功率; 噪声功率估计器，其对所述相关值应用差分解调方法以去除定时偏移并计算噪声功率; 以及使用整个功率和噪声功率来估计信噪比（SNR）的估计单元。

公开(公告)号：US20090060069A1

公开(公告)日：2009-03-05

申请号：US12105172

申请日：2008-04-17

申请人： Jun-Woo KIM ,  Dae-Ho KIM ,  Young-Ha LEE ,  Youn-Ok PARK

发明人： Jun-Woo KIM ,  Dae-Ho KIM ,  Young-Ha LEE ,  Youn-Ok PARK

IPC分类号： H04L27/28

CPC分类号： H04L27/2607 ,  H04L27/263

摘要： The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal transmitting apparatus according to an embodiment of the present invention receives data, and performs inverse fast Fourier transform (IFFT) on the data on the basis of a twiddle factor for shifting output data by the size of a cyclic prefix. In addition, the signal transmitting apparatus sequentially stores data corresponding to the size of the cyclic prefix starting with initial data among the transformed data, and generates an OFDM symbol on the basis of the stored data and the transformed data. According to the embodiment of the present invention, it is possible to efficiently reduce a time delay and a memory use amount when a cyclic prefix is added at a transmitting end, without changing the size of hardware and power consumption.

摘要翻译： 信号发送装置及其方法技术领域本发明涉及信号发送装置及其方法以及信号发送装置的快速傅里叶逆变换（IFFT）装置。 根据本发明的实施例的信号发送装置接收数据，并且基于用于根据循环前缀的大小移位输出数据的旋转因子对数据进行快速傅立叶逆变换（IFFT）。 此外，信号发送装置顺序地存储与变换数据中的初始数据开始的循环前缀的大小相对应的数据，并且根据存储的数据和变换后的数据生成OFDM符号。 根据本发明的实施例，可以有效地减少在发送端添加循环前缀的时间延迟和存储器使用量，而不改变硬件和功耗的大小。