公开(公告)号：US20060153144A1

公开(公告)日：2006-07-13

申请号：US11328841

申请日：2006-01-10

申请人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Dae-Sik Hong ,  Young-Bo Cho

发明人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Dae-Sik Hong ,  Young-Bo Cho

IPC分类号： H04B7/216

CPC分类号： H04L25/0226 ,  H04L5/023 ,  H04L27/261

摘要： Disclosed is a method for estimating a channel using a pilot signal in a wireless communication system based on multi-carrier multiple access. A transmission side generates a pilot symbol correlated with spread data symbols which is included in a spread symbol generated through a band spreading, inserts the pilot symbol into the spread symbol, and transmits the spread symbol. A reception side receives the spread symbol and detects the pilot signal by using the spread data symbols and pilot symbol included in the spread symbol. Therefore, it is possible to simultaneously obtain both the position optimization of a pilot symbol, according to a channel state such as a correlation band or correlation time (which is an advantage over the pilot-tone-based channel estimation method), and a noise reduction effect by the averaging procedure (which is an advantage over the pilot-channel-based channel estimation method), so that the accuracy of channel estimation can be improved.

摘要翻译： 公开了一种基于多载波多路访问在无线通信系统中使用导频信号来估计信道的方法。 传输侧产生与通过频带扩展生成的扩展符号中包含的扩展数据符号相关的导频符号，将导频符号插入到扩展符号中，并发送扩展符号。 接收侧接收扩展符号，并通过使用扩展符号中包含的扩展数据符号和导频符号来检测导频信号。 因此，可以根据诸如相关频带或相关时间（相对于基于导频音调的信道估计方法来说是优点）的信道状态同时获得导频符号的位置优化， 通过平均处理（相对于基于导频信道的信道估计方法来说是优点）的缩小效果，可以提高信道估计的精度。

公开(公告)号：US20060176993A1

公开(公告)日：2006-08-10

申请号：US11346698

申请日：2006-02-03

申请人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Dae-Sik Hong ,  Eun-Seok Ko

发明人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Dae-Sik Hong ,  Eun-Seok Ko

IPC分类号： H04L7/00

CPC分类号： H04L1/0618 ,  H04B7/0417 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0691

摘要： A signal transmission method for a multiple input multiple output (MIMO) communication system. A transmitter having a plurality of transmission antennas receives antenna selection information from a receiver having at least one reception antenna. The transmitter selects at least two transmission antennas based on the antenna selection information, beamforms space-time block coding (STBC)-coded input signals with a weighting matrix, and transmits the beamformed signals via the selected transmission antennas. The antenna selection information is generated based on exact channel characteristics and statistical channel characteristics for the transmission antennas and a spatial correlation between the transmission antennas.

摘要翻译： 一种用于多输入多输出（MIMO）通信系统的信号传输方法。 具有多个发送天线的发射机从具有至少一个接收天线的接收机接收天线选择信息。 发射机基于天线选择信息来选择至少两个发射天线，波束形成具有加权矩阵的时空块编码（STBC）编码的输入信号，并且经由所选择的发射天线发射波束形成的信号。 天线选择信息是基于发射天线的精确信道特性和统计信道特性以及发射天线之间的空间相关来产生的。

公开(公告)号：US20050282499A1

公开(公告)日：2005-12-22

申请号：US11143074

申请日：2005-06-02

申请人： Goo-Hyun Park ,  Dae-Sik Hong ,  Ye-Hoon Lee ,  Eung-Sun Kim ,  Myeon-Gyun Cho ,  Jong-Hyeuk Lee

发明人： Goo-Hyun Park ,  Dae-Sik Hong ,  Ye-Hoon Lee ,  Eung-Sun Kim ,  Myeon-Gyun Cho ,  Jong-Hyeuk Lee

IPC分类号： H04B7/26 ,  G01S11/10 ,  G01S13/08 ,  H04B17/00 ,  H04W64/00

CPC分类号： G01S11/10 ,  H04W64/006

摘要： Disclosed is a method for estimating the velocity of a mobile station in Rician fading environments in which a direct wave exists. Cellular mobile communication environments include two environments, Rician fading environments in which a direct wave exists and Rayleigh fading environments in which a direct wave does not exist. Generally, many methods for estimating the velocity of a mobile station have been known in Rayleigh fading environments. However, in Rician fading environments in which a direct wave exists, many errors occurs in estimating the velocity of a mobile station due to difficulty in estimation of a Rician coefficient K and an incident angle θ0. According to the invention, a method is provided wherein error is mostly eliminated in estimating the velocity of a mobile station by obtaining a maximum Doppler frequency of the mobile station, even without directly obtaining a Rician coefficient K and an incident angle θ0.

摘要翻译： 公开了一种用于估计在存在直接波的Rician衰落环境中的移动台的速度的方法。 蜂窝移动通信环境包括两个环境，其中存在直接波的Rician衰落环境和不存在直接波的瑞利衰落环境。 通常，用于估计移动台的速度的许多方法在瑞利衰落环境中是已知的。 然而，在存在直接波的Rician衰落环境中，由于难以估计Rician系数K和入射角θ0而在估计移动台的速度时出现许多错误。 根据本发明，提供了一种方法，其中通过获得移动台的最大多普勒频率来估计移动台的速度大多消除了误差，即使没有直接获得Rician系数K和入射角θ0 。

公开(公告)号：US20050267370A1

公开(公告)日：2005-12-01

申请号：US11141178

申请日：2005-05-31

申请人： Goo-Hyun Park ,  Ye-Hoon Lee ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Ho-Jin Kim ,  Dae-Sik Hong

发明人： Goo-Hyun Park ,  Ye-Hoon Lee ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Ho-Jin Kim ,  Dae-Sik Hong

IPC分类号： H04B7/26 ,  A61B8/02 ,  G01S11/10

CPC分类号： G01S11/10

摘要： A velocity estimation apparatus and method for a communication system including a transmitter for transmitting signals through wireless channels and a receiver for receiving the signals and restoring data. The apparatus includes a pilot signal detector for detecting a pilot signal from a received signal, a maximum Doppler frequency estimator for estimating a maximum Doppler frequency using the pilot signal detected by the pilot signal detector, and an adaptive type band-limit filter having a limit band based on a previous output value of the maximum Doppler frequency estimator. By using the pilot signal, which is removed with noise, while passing through the band-limit filter, it is possible to precisely estimate a maximum Doppler frequency, and thereby estimate the velocity.

摘要翻译： 一种用于通信系统的速度估计装置和方法，包括用于通过无线信道发送信号的发射机和用于接收信号和恢复数据的接收机。 该装置包括用于从接收信号检测导频信号的导频信号检测器，用于使用由导频信号检测器检测的导频信号来估计最大多普勒频率的最大多普勒频率估计器，以及具有限制的自适应型限幅滤波器 基于最大多普勒频率估计器的先前输出值的频带。 通过使用在通过带限滤波器时被噪声去除的导频信号，可以精确地估计最大多普勒频率，从而估计速度。

公开(公告)号：US07515902B2

公开(公告)日：2009-04-07

申请号：US11143074

申请日：2005-06-02

申请人： Goo-Hyun Park ,  Dae-Sik Hong ,  Ye-Hoon Lee ,  Eung-Sun Kim ,  Myeon-Gyun Cho ,  Jong-Hyeuk Lee

发明人： Goo-Hyun Park ,  Dae-Sik Hong ,  Ye-Hoon Lee ,  Eung-Sun Kim ,  Myeon-Gyun Cho ,  Jong-Hyeuk Lee

IPC分类号： H04Q7/20

CPC分类号： G01S11/10 ,  H04W64/006

摘要： Disclosed is a method for estimating the velocity of a mobile station in Rician fading environments in which a direct wave exists. Cellular mobile communication environments include two environments, Rician fading environments in which a direct wave exists and Rayleigh fading environments in which a direct wave does not exist. Generally, many methods for estimating the velocity of a mobile station have been known in Rayleigh fading environments. However, in Rician fading environments in which a direct wave exists, many errors occurs in estimating the velocity of a mobile station due to difficulty in estimation of a Rician coefficient K and an incident angle θ0. According to the invention, a method is provided wherein error is mostly eliminated in estimating the velocity of a mobile station by obtaining a maximum Doppler frequency of the mobile station, even without directly obtaining a Rician coefficient K and an incident angle θ0.

摘要翻译： 公开了一种用于估计在存在直接波的Rician衰落环境中的移动台的速度的方法。 蜂窝移动通信环境包括两个环境，其中存在直接波的Rician衰落环境和不存在直接波的瑞利衰落环境。 通常，用于估计移动台的速度的许多方法在瑞利衰落环境中是已知的。 然而，在存在直接波的Rician衰落环境中，由于难以估计Rician系数K和入射角θ0，在估计移动台的速度时出现许多错误。 根据本发明，提供了一种方法，其中即使没有直接获得Rician系数K和入射角θ0，通过获得移动台的最大多普勒频率来估计移动台的速度，大多数地消除了误差。

公开(公告)号：US08189696B2

公开(公告)日：2012-05-29

申请号：US12080650

申请日：2008-04-03

申请人： Jong-Hyeuk Lee ,  Sang-Boh Yun ,  Joo-Hyun Lee ,  Dae-Sik Hong ,  Hyung-Joon Song

发明人： Jong-Hyeuk Lee ,  Sang-Boh Yun ,  Joo-Hyun Lee ,  Dae-Sik Hong ,  Hyung-Joon Song

IPC分类号： H04L27/28

CPC分类号： H04L5/0007 ,  H04B7/155 ,  H04L25/03057 ,  H04L25/03178 ,  H04L2001/0097

摘要： An apparatus and method for data transmission in an Orthogonal Frequency Division Multiplexing (OFDM) communication system are provided. An OFDM system includes a reference Relay Station (RS) and a cooperative relay station respectively for performing an Spatially Layered transmission Mode (SLM) process by modulating a phase and magnitude of a signal by using a predetermined modulation order suitable for the reference relay station to obtain a spatially-layered signal and for delivering the spatially-layered signal to a target Mobile Station (MS); a Base Station (BS) for selecting the reference relay station and the cooperative relay station among a plurality of relay stations; and an mobile station for detecting data through Maximum Likelihood (ML) detection in which a signal having the largest ML is detected by comparing the received spatially-layered signal with a signal which is converted through the SLM upon receiving the spatially-layered signal from the reference relay station and the cooperative relay station.

摘要翻译： 提供了一种用于正交频分复用（OFDM）通信系统中的数据传输的装置和方法。 OFDM系统包括参考中继站（RS）和协作中继站，分别用于通过使用适合于参考中继站的预定调制顺序来调制信号的相位和幅度来执行空间分层传输模式（SLM）处理 获得空间分层信号并将空间分层信号传送到目标移动站（MS）; 用于在多个中继站中选择参考中继站和协作中继站的基站（BS）; 以及用于通过最大似然（ML）检测来检测数据的移动站，其中通过将接收到的空间分层信号与从所述SLM接收到的空间分层信号中经过SLM转换的信号进行比较来检测具有最大ML的信号 参考中继站和合作中继站。

公开(公告)号：US20080247478A1

公开(公告)日：2008-10-09

申请号：US12080650

申请日：2008-04-03

申请人： Jong-Hyeuk Lee ,  Sang-Boh Yun ,  Joo-Hyun Lee ,  Dae-Sik Hong ,  Hyung-Joon Song

发明人： Jong-Hyeuk Lee ,  Sang-Boh Yun ,  Joo-Hyun Lee ,  Dae-Sik Hong ,  Hyung-Joon Song

IPC分类号： H04K1/10 ,  H04B7/14

CPC分类号： H04L5/0007 ,  H04B7/155 ,  H04L25/03057 ,  H04L25/03178 ,  H04L2001/0097

摘要： An apparatus and method for data transmission in an Orthogonal Frequency Division Multiplexing (OFDM) communication system are provided. An OFDM system includes a reference Relay Station (RS) and a cooperative relay station respectively for performing an Spatially Layered transmission Mode (SLM) process by modulating a phase and magnitude of a signal by using a predetermined modulation order suitable for the reference relay station to obtain a spatially-layered signal and for delivering the spatially-layered signal to a target Mobile Station (MS); a Base Station (BS) for selecting the reference relay station and the cooperative relay station among a plurality of relay stations; and an mobile station for detecting data through Maximum Likelihood (ML) detection in which a signal having the largest ML is detected by comparing the received spatially-layered signal with a signal which is converted through the SLM upon receiving the spatially-layered signal from the reference relay station and the cooperative relay station.

摘要翻译： 提供了一种用于正交频分复用（OFDM）通信系统中的数据传输的装置和方法。 OFDM系统包括参考中继站（RS）和协作中继站，分别用于通过使用适合于参考中继站的预定调制顺序来调制信号的相位和幅度来执行空间分层传输模式（SLM）处理 获得空间分层信号并将空间分层信号传送到目标移动站（MS）; 用于在多个中继站中选择参考中继站和协作中继站的基站（BS）; 以及用于通过最大似然（ML）检测来检测数据的移动站，其中通过将接收到的空间分层信号与从所述SLM接收到的空间分层信号中经过SLM转换的信号进行比较来检测具有最大ML的信号 参考中继站和合作中继站。

公开(公告)号：US08195174B2

公开(公告)日：2012-06-05

申请号：US12061993

申请日：2008-04-03

申请人： Joo-Hyun Lee ,  Sang-Boh Yun ,  Jong-Hyeuk Lee ,  Dae-Sik Hong ,  Tae-Hoon Kwon

发明人： Joo-Hyun Lee ,  Sang-Boh Yun ,  Jong-Hyeuk Lee ,  Dae-Sik Hong ,  Tae-Hoon Kwon

IPC分类号： H04W72/00

CPC分类号： H04W52/346 ,  H04W72/048

摘要： A method and apparatus for allocating resources for a mobile station in a communication system is provided. The method includes determining if a mobile station within a cell is located in one of a first region corresponding to a cell center, a third region corresponding to a cell edge, and a second region corresponding to an area between the first and third regions, allocating frequency resources within an entire frequency band to the mobile station when the mobile station is located in the first region, wherein the entire frequency band comprises at least a first frequency band and a second frequency band, allocating frequency resources within the first frequency band to the mobile station when the mobile station is located in the third region, and allocating frequency resources within the second frequency band to the mobile station when the mobile station is located in the second region.

摘要翻译： 提供了一种在通信系统中为移动台分配资源的方法和装置。 该方法包括：确定小区内的移动台是否位于对应于小区中心的第一区域，对应于小区边缘的第三区域和对应于第一和第三区域之间的区域的第二区域中的一个中，分配 当所述移动站位于所述第一区域中时，所述整个频带内的频率资源到所述移动站，其中，所述整个频带包括至少第一频带和第二频带，将所述第一频带内的频率资源分配给所述第一频带 当所述移动站位于所述第三区域时，将所述第二频带内的频率资源分配给所述移动站。

公开(公告)号：US20050185605A1

公开(公告)日：2005-08-25

申请号：US11035843

申请日：2005-01-14

申请人： Young-Bo Cho ,  Dae-Sik Hong ,  Sang-Min Ro ,  Chan-Soo Hwang ,  Jae-Hak Chung

发明人： Young-Bo Cho ,  Dae-Sik Hong ,  Sang-Min Ro ,  Chan-Soo Hwang ,  Jae-Hak Chung

IPC分类号： H04B1/69 ,  H04B7/216 ,  H04J13/00 ,  H04L5/02 ,  H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0226 ,  H04J13/00 ,  H04L5/0021 ,  H04L5/0048 ,  H04L25/022 ,  H04L27/2613

摘要： A channel estimation method in a wireless communication system based on multicarrier-code division multiple access (MC-CDMA) using frequency interleaving. A transmitter generates transmission symbols using a pilot signal (P) and an inverted pilot signal (−P) according to subcarriers on which spread symbols generated from a spectrum spreading operation are sent, performs an interleaving operation for the transmission symbols in a frequency domain, and transmits a result of the interleaving operation. A receiver extracts the pilot signal (P) and inverted pilot signal (−P) included in the transmission symbols and performs channel estimation.

摘要翻译： 基于使用频率交织的多载波码分多址（MC-CDMA）的无线通信系统中的信道估计方法。 发射机根据从频谱扩展运算产生的扩频符号发送的子载波，使用导频信号（P）和反向导频信号（-P）生成发送符号，对频域中的发送符号进行交织操作， 并发送交织操作的结果。 接收机提取发送符号中包含的导频信号（P）和反向导频信号（-P），进行信道估计。

公开(公告)号：US09012347B2

公开(公告)日：2015-04-21

申请号：US13824935

申请日：2011-09-28

申请人： Hyeon-Gook Kim ,  Ki-Soo Lee ,  Dae-Sik Hong ,  Eun-Kyoung Song ,  Man-Seong Jeon

发明人： Hyeon-Gook Kim ,  Ki-Soo Lee ,  Dae-Sik Hong ,  Eun-Kyoung Song ,  Man-Seong Jeon

IPC分类号： C08F4/02 ,  C08F4/642 ,  C08F4/6592 ,  C08F10/00 ,  C08F4/659 ,  B01J31/16 ,  B01J31/22

CPC分类号： C08F4/6592 ,  B01J31/1616 ,  B01J31/2295 ,  C08F4/65912 ,  C08F4/65925 ,  C08F10/00 ,  C08F2420/02 ,  Y10S526/943 ,  C08F4/65916 ,  C08F110/02 ,  C08F2500/18 ,  C08F210/16 ,  C08F210/14

摘要： The present invention relates to a preparation method of a metallocene catalyst. More particularly, the present invention relates to a preparation method of a supported hybrid metallocene catalyst, including the steps of treating a support having a water content of 4 to 7% by weight with trialkyl aluminum at a predetermined temperature; supporting alkyl aluminoxane on the support; and supporting a metallocene compound on the alkyl aluminoxane-supported support. According to the present invention, it is possible to prepare a supported hybrid metallocene catalyst which shows a high activity in the polymerization of olefins and enables the preparation of polyolefins having a high bulk density, by a simple process.

摘要翻译： 本发明涉及茂金属催化剂的制备方法。 更具体地说，本发明涉及一种负载型杂化金属茂催化剂的制备方法，包括以三烷基铝在预定温度下处理含水量为4-7重量％的载体的步骤; 支持烷基铝氧烷; 并在烷基铝氧烷负载的载体上负载金属茂化合物。 根据本发明，可以通过简单的方法制备在烯烃聚合中显示出高活性的负载型杂化金属茂催化剂，并且能够制备堆积密度高的聚烯烃。