公开(公告)号：US07778338B2

公开(公告)日：2010-08-17

申请号：US11636799

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2662 ,  H04B7/0413 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/0048 ,  H04L27/2657 ,  H04L27/2679

摘要： The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols. Therefore, the system is realized in a simpler manner and timing error and frequency offset estimation and compensation performance is further improved.

摘要翻译： 本发明涉及用于估计MIMO移动通信系统中的定时误差和频率偏移的方法和装置。 在包括多个发送天线和多个接收天线的系统中，将预定的前导码符号插入由发送装置发送的帧中，并将伪噪声与前导符号相乘，并且通过每个发送结果信号发送结果信号 发射天线。 接收装置通过每个接收天线接收信号，从OFDM符号中提取前导码符号，并且乘以对应于由发送装置使用的伪噪声并被所提取的前导符号移位的本地伪噪声。 根据发送装置的伪噪声与接收装置的本地伪噪声的相关性来估计和补偿定时误差。 根据前导符号之间的相位差来估计和补偿频率偏移。 因此，系统以简单的方式实现，进一步提高了定时误差和频偏估计和补偿性能。

公开(公告)号：US20080008082A1

公开(公告)日：2008-01-10

申请号：US11722063

申请日：2005-03-15

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04J11/00

CPC分类号： H04L27/2657 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2675

摘要： The present invention relates to a method for estimating a timing error and a frequency offset in a high-speed portable Internet system and a method thereof. A predetermined preamble symbol is added to an OFDM frame to be transmitted by a transmitter according to an exemplary embodiment of the present invention, an IFFT operation is performed, and then a pseudo noise is multiplexed by the preamble symbol to estimate the timing error and the frequency offset. A receiver receives an OFDM symbol, extracts the preamble symbol from the OFDM symbol, and multiplexes the extracted preamble symbol by a local pseudo noise, which is equal to the pseudo noise used by the transmitter but is shifted.

摘要翻译： 本发明涉及用于估计高速便携式因特网系统中的定时误差和频率偏移的方法及其方法。 根据本发明的示例性实施例，将预定的前导码符号添加到要由发射机发射的OFDM帧，执行IFFT操作，然后通过前导码符号复用伪噪声以估计定时误差，并且 频偏。 接收机接收OFDM符号，从OFDM符号中提取前导码符号，并将所提取的前导符号多路复用等于由发射机使用的伪噪声但被移位的本地伪噪声。

公开(公告)号：US20070183518A1

公开(公告)日：2007-08-09

申请号：US11636799

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10

CPC分类号： H04L27/2662 ,  H04B7/0413 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/0048 ,  H04L27/2657 ,  H04L27/2679

摘要： The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols. Therefore, the system is realized in a simpler manner and timing error and frequency offset estimation and compensation performance is further improved.

摘要翻译： 本发明涉及用于估计MIMO移动通信系统中的定时误差和频率偏移的方法和装置。 在包括多个发送天线和多个接收天线的系统中，将预定的前导码符号插入由发送装置发送的帧中，并将伪噪声与前导符号相乘，并且通过每个发送结果信号发送结果信号 发射天线。 接收装置通过每个接收天线接收信号，从OFDM符号中提取前导码符号，并且乘以对应于由发送装置使用的伪噪声并被所提取的前导符号移位的本地伪噪声。 根据发送装置的伪噪声与接收装置的本地伪噪声的相关性来估计和补偿定时误差。 根据前导符号之间的相位差来估计和补偿频率偏移。 因此，系统以简单的方式实现，进一步提高了定时误差和频偏估计和补偿性能。

公开(公告)号：US07961697B2

公开(公告)日：2011-06-14

申请号：US11722063

申请日：2005-03-25

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04B7/208

CPC分类号： H04L27/2657 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2675

摘要： The present invention relates to a method for estimating a timing error and a frequency offset in a high-speed portable Internet system and a method thereof. A predetermined preamble symbol is added to an OFDM frame to be transmitted by a transmitter according to an exemplary embodiment of the present invention, an IFFT operation is performed, and then a pseudo noise is multiplexed by the preamble symbol to estimate the timing error and the frequency offset. A receiver receives an OFDM symbol, extracts the preamble symbol from the OFDM symbol, and multiplexes the extracted preamble symbol by a local pseudo noise, which is equal to the pseudo noise used by the transmitter but is shifted.

摘要翻译： 本发明涉及用于估计高速便携式因特网系统中的定时误差和频率偏移的方法及其方法。 根据本发明的示例性实施例，将预定的前导码符号添加到要由发射机发射的OFDM帧，执行IFFT操作，然后通过前导码符号复用伪噪声以估计定时误差，并且 频偏。 接收机接收OFDM符号，从OFDM符号中提取前导码符号，并将所提取的前导符号多路复用等于由发射机使用的伪噪声但被移位的本地伪噪声。

公开(公告)号：US20070153927A1

公开(公告)日：2007-07-05

申请号：US11636872

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10 ,  H04B1/10

CPC分类号： H04L27/2647 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/025 ,  H04L25/03821

摘要： An ICI cancellation iterative receiver and an ICI cancellation method in the wireless communication system is provided. In order to eliminate the Inter-carrier-interference (ICI) due to phase noise, an adaptive ICI cancellation scheme based on the wireless communication system is presented. In order to correct the contaminated preamble symbols due to phase noise, a first LMS adaptive filter in the receiver cancels the ICI. In the following data symbols of a frame, joint of the turbo decoder and channel estimation is provided. The complexity of the joint algorithm is analyzed and the algorithm can be implemented in the wireless communication system. The simulation results show that the performance can be improved dramatically.

摘要翻译： 提供了无线通信系统中的ICI消除迭代接收机和ICI消除方法。 为了消除由于相位噪声引起的载波间干扰（ICI），提出了一种基于无线通信系统的自适应ICI消除方案。 为了校正由于相位噪声引起的污染的前导码符号，接收机中的第一LMS自适应滤波器消除了ICI。 在帧的以下数据符号中，提供turbo解码器和信道估计的联合。 分析了联合算法的复杂性，并且可以在无线通信系统中实现该算法。 仿真结果表明，性能可以大大提高。

公开(公告)号：US07936832B2

公开(公告)日：2011-05-03

申请号：US11636872

申请日：2006-12-11

申请人： Zhang-Yong Ma ,  Young-Il Kim

发明人： Zhang-Yong Ma ,  Young-Il Kim

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2647 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/025 ,  H04L25/03821

摘要： An ICI cancellation iterative receiver and an ICI cancellation method in the wireless communication system is provided. In order to eliminate the Inter-carrier-interference (ICI) due to phase noise, an adaptive ICI cancellation scheme based on the wireless communication system is presented. In order to correct the contaminated preamble symbols due to phase noise, a first LMS adaptive filter in the receiver cancels the ICI. In the following data symbols of a frame, joint of the turbo decoder and channel estimation is provided. The complexity of the joint algorithm is analyzed and the algorithm can be implemented in the wireless communication system. The simulation results show that the performance can be improved dramatically.

摘要翻译： 提供了无线通信系统中的ICI消除迭代接收机和ICI消除方法。 为了消除由于相位噪声引起的载波间干扰（ICI），提出了一种基于无线通信系统的自适应ICI消除方案。 为了校正由于相位噪声引起的污染的前导码符号，接收机中的第一LMS自适应滤波器消除了ICI。 在帧的以下数据符号中，提供turbo解码器和信道估计的联合。 分析了联合算法的复杂性，并且可以在无线通信系统中实现该算法。 仿真结果表明，性能可以大大提高。

公开(公告)号：US08973060B2

公开(公告)日：2015-03-03

申请号：US13289412

申请日：2011-11-04

申请人： Young-Il Kim

发明人： Young-Il Kim

IPC分类号： H04N7/20 ,  H04B7/155 ,  H04W88/04

CPC分类号： H04B7/1555 ,  H04W88/04

摘要： There is provided a method where a terminal amplifies an MBS signal that the terminal receives using a terminal in an MBS service, transmits the amplified signal to another terminal and controls it in order to overcome the fact it is not possible to provide high quality contents over a broad area due to interference signals between MBS zones, a terminal is used as a repeater at MBS transmission time only, and an output of a repeating signal of the terminal is controlled so that an excessive interference signal for another MBS area is not generated when the terminal operates as a repeater.

摘要翻译： 提供了一种方法，其中终端放大终端在MBS服务中接收的MBS信号，将放大的信号发送到另一终端并进行控制，以克服不可能提供高质量内容的事实 由于MBS区域之间的干扰信号引起的广泛区域，仅在MBS传输时间将终端用作中继器，并且控制终端的重复信号的输出，使得对于另一个MBS区域的过多的干扰信号不被产生， 终端作为中继器运行。

公开(公告)号：US08576726B2

公开(公告)日：2013-11-05

申请号：US12735166

申请日：2008-10-13

申请人： Seung Kwon Cho ,  Jung Hoon Oh ,  Su Chang Chae ,  Young-Il Kim

发明人： Seung Kwon Cho ,  Jung Hoon Oh ,  Su Chang Chae ,  Young-Il Kim

IPC分类号： G01R31/06

CPC分类号： H04W72/1289 ,  Y02D70/146

摘要： A communication method according to the present invention includes receiving MAP in formation, acquiring an initial scheduled frame number and a current frame number from the MAP information, calculating the difference between the initial scheduled frame number and the current frame number, comparing the difference between the initial scheduled frame number and the current frame number with a reference value and setting a scheduled frame number, and performing transmission or reception in the scheduled frame. Therefore, even though a MAP loss occurs, the mobile station can receive only downlink data effective in downlink, thereby reducing power consumption for unnecessary reception, and can exactly perform transmission in a frame in which it should transmit in uplink.

摘要翻译： 根据本发明的通信方法包括：接收MAP，从MAP信息中获取初始调度帧号和当前帧号，计算初始调度帧号与当前帧号之间的差值， 初始调度帧号和具有参考值的当前帧号，并设置调度帧号，并在调度帧中执行发送或接收。 因此，即使发生MAP丢失，移动台也可以只接收下行链路中有效的下行链路数据，从而减少不必要的接收的功耗，能够在上行链路中发送的帧中正确地进行发送。

公开(公告)号：US08542624B2

公开(公告)日：2013-09-24

申请号：US12808824

申请日：2008-09-16

申请人： Su Chang Chae ,  Seung Kwon Cho ,  Young-Il Kim

发明人： Su Chang Chae ,  Seung Kwon Cho ,  Young-Il Kim

IPC分类号： H04B7/14

CPC分类号： H04L25/24 ,  H04L1/0003 ,  H04L1/0056 ,  H04L27/0008 ,  H04L27/34 ,  H04L2001/0097

摘要： A method of transmitting a signal according to the present invention includes: receiving a signal that is encoded with a predetermined code rate and that is modulated by a first modulation method from a base station; creating a signal that is obtained by demodulating the signal that is modulated by the first modulation method using a method corresponding to the first modulation method; creating a signal that is obtained by modulating the demodulated signal using a second modulation method while maintaining the predetermined code rate; and transmitting the signal that is modulated by the second modulation to a mobile station.Therefore, it is possible to reduce the cost of the relay station and simplify the system of the relay station. Further, during the modulation and demodulation, the symbol offset is changed to create various modulated and demodulated signals.

摘要翻译： 根据本发明的发送信号的方法包括：从基站接收以预定码率编码并由第一调制方法调制的信号; 创建通过使用对应于第一调制方法的方法解调由第一调制方法调制的信号而获得的信号; 创建通过使用第二调制方法调制解调信号而获得的信号，同时保持预定码率; 以及将由所述第二调制调制的信号发送到移动台。 因此，可以降低中继站的成本并简化中继站的系统。 此外，在调制和解调期间，改变符号偏移以产生各种调制和解调的信号。

公开(公告)号：US08373815B2

公开(公告)日：2013-02-12

申请号：US12919949

申请日：2009-02-27

申请人： Yong-Shig Shim ,  Young-Il Kim ,  Jeong-Ho Park

发明人： Yong-Shig Shim ,  Young-Il Kim ,  Jeong-Ho Park

IPC分类号： G02F1/1335

CPC分类号： G02B5/045 ,  G02F2001/133607

摘要： An optical sheet and a Liquid Crystal Display (LCD) incorporating the same. The LCD includes a sheet-like transparent substrate made of a transparent material and a microscopic structure layer formed on one surface of the transparent substrate. The microscopic structure layer has an array of microscopic structures to emit light. A liquid crystal panel is formed above the microscopic structure layer, and has defined therein a plurality of pixels to display an image. When seen from above the transparent substrate, at least a portion of the microscopic structures has parallel and non-parallel arrangements repeated one or more times in a longitudinal direction thereof with respect to one side-edge of the pixels of the liquid crystal panel.

摘要翻译： 光学片和包含该光学片的液晶显示器（LCD）。 LCD包括由透明材料制成的片状透明基板和形成在透明基板的一个表面上的微观结构层。 微观结构层具有发光的微观结构阵列。 在微观结构层上方形成液晶面板，并在其中限定了多个像素以显示图像。 当从透明基板的上方观察时，至少一部分微观结构具有相对于液晶面板的像素的一个侧边在其纵向上重复一次或多次的平行和非平行布置。