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：US20050128983A1

公开(公告)日：2005-06-16

申请号：US10988947

申请日：2004-11-15

申请人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Ho-Jin Kim ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Il-Han Kim

发明人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Ho-Jin Kim ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Il-Han Kim

IPC分类号： H04B7/02 ,  H04B7/06 ,  H04B7/08 ,  H04Q7/00

CPC分类号： H04B7/0874 ,  H04B7/0691

摘要： Disclosed is a method for configuring transmission antenna groups in a mobile communication system with multiple transmission antennas and multiple reception antennas. The method includes the steps of: receiving a first matrix having a size of ‘Nt×Nt’, which corresponds to Nt number of transmission antennas, fedback from the mobile terminal, generating combinations of sub-matrixes of the first matrix corresponding to Nr number of reception antennas, and calculating sums of maximum eigenvalues; determining combinations of the sub-matrixes having a maximum value from among the calculated sums of eigenvalues to be transmission antenna groups for the Nt number of transmission antennas; and transmitting different relevant symbols from each other through the transmission antenna groups.

摘要翻译： 公开了一种在具有多个发送天线和多个接收天线的移动通信系统中配置发送天线组的方法。 该方法包括以下步骤：接收一个大小为N N T N T N T N T N T N T N T N T N T N T N T N 发送天线，从移动终端反馈，生成与第N个接收天线数相对应的第一矩阵的子矩阵的组合，以及计算最大特征值的和; 确定具有最大值的子矩阵的组合，其中所计算的特征值之和成为发送天线的N T个数量的发送天线组; 并通过发射天线组彼此发送不同的相关符号。

公开(公告)号：US07912146B2

公开(公告)日：2011-03-22

申请号：US11546667

申请日：2006-10-12

申请人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jong-Hyung Kwun

发明人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jong-Hyung Kwun

IPC分类号： H04L27/00

CPC分类号： H04L25/03159 ,  H04L1/0606 ,  H04L1/08

摘要： A method and apparatus for transmitting data in a communication system. In the apparatus, a repeater repeatedly processes an input signal a predetermined number of times. A Space-Frequency Block-Coded (SFBC) encoder performs SFBC coding on the repeatedly processed input signals, and outputs at least two signal blocks in parallel. A cyclic prefix (CP) inserter inserts a CP in the signal blocks and transmits the CP-inserted signal blocks via associated transmission antennas using a single carrier.

摘要翻译： 一种用于在通信系统中发送数据的方法和装置。 在该装置中，中继器重复地将输入信号处理预定次数。 空间频率块编码（SFBC）编码器对重复处理的输入信号执行SFBC编码，并且并行地输出至少两个信号块。 循环前缀（CP）插入器将CP插入信号块中，并使用单载波通过相关联的发送天线发送CP插入的信号块。

公开(公告)号：US20070098095A1

公开(公告)日：2007-05-03

申请号：US11546667

申请日：2006-10-12

申请人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jong-Hyung Kwun

发明人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jong-Hyung Kwun

IPC分类号： H04K1/10 ,  H04L27/36

CPC分类号： H04L25/03159 ,  H04L1/0606 ,  H04L1/08

摘要： A method and apparatus for transmitting data in a communication system. In the apparatus, a repeater repeatedly processes an input signal a predetermined number of times. A Space-Frequency Block-Coded (SFBC) encoder performs SFBC coding on the repeatedly processed input signals, and outputs at least two signal blocks in parallel. A cyclic prefix (CP) inserter inserts a CP in the signal blocks and transmits the CP-inserted signal blocks via associated transmission antennas using a single carrier.

摘要翻译： 一种用于在通信系统中发送数据的方法和装置。 在该装置中，中继器重复地将输入信号处理预定次数。 空间频率块编码（SFBC）编码器对重复处理的输入信号执行SFBC编码，并且并行地输出至少两个信号块。 循环前缀（CP）插入器将CP插入信号块中，并使用单载波通过相关联的发送天线发送CP插入的信号块。

公开(公告)号：US20070041348A1

公开(公告)日：2007-02-22

申请号：US11493449

申请日：2006-07-26

申请人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Myeon-Kyun Cho ,  Jong-Hyeuk Lee ,  Hyun-Kyu Yu ,  Daesik Hong

发明人： Jong-Hyung Kwun ,  Eung-Sun Kim ,  Myeon-Kyun Cho ,  Jong-Hyeuk Lee ,  Hyun-Kyu Yu ,  Daesik Hong

IPC分类号： H04B7/216

CPC分类号： H04L27/2657 ,  H04B1/70735 ,  H04J11/0069 ,  H04L5/0017 ,  H04L5/0048 ,  H04L25/03866 ,  H04L27/2613

摘要： Disclosed is transmitting/receiving apparatus and method for efficient cell search in a broadband wireless communication system using multiple carriers. The apparatus includes a BS generating an SCH signal by mapping predetermined symbols to predetermined subcarriers according to a code group to which the BS belongs, code-multiplexing a TCH signal and a pilot channel signal mapped to a predetermined time-frequency area and scrambling the code-multiplexed signal with a predetermined scrambling code identifying the BS along a time axis first, time-multiplexing the SCH signal with the scrambled signal, OFDM-modulating the time-multiplexed signal, and transmitting the OFDM-modulated signal.

摘要翻译： 公开了在使用多个载波的宽带无线通信系统中用于高效小区搜索的发射/接收装置和方法。 该装置包括通过根据BS所属的代码组将预定符号映射到预定的子载波来生成SCH信号的BS，对TCH信号进行码复用和映射到预定的时频区域的导频信道信号， 首先确定沿着时间轴的BS的预定扰频码的多路复用信号，用加扰信号对SCH信号进行时分多路复用，对时间复用信号进行OFDM调制，以及发送OFDM调制信号。

公开(公告)号：US20050180354A1

公开(公告)日：2005-08-18

申请号：US10996699

申请日：2004-11-24

申请人： Yoon-Ok Cho ,  Yong-Hoon Lee ,  Young-Ho Jung ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Seung-Hoon Nam

发明人： Yoon-Ok Cho ,  Yong-Hoon Lee ,  Young-Ho Jung ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Seung-Hoon Nam

IPC分类号： H04L1/00 ,  H04L5/02 ,  H04L27/26 ,  H04Q7/00

CPC分类号： H04L5/023 ,  H04L1/0003 ,  H04L1/0015 ,  H04L27/2608

摘要： An adaptive modulation scheme relating to an RA problem for maximizing the transmission rates of all users for maximum transmission rates in an OFDMA system including some users requiring to use services at fixed data rates. The scheme proposes introduction of an adaptive modulation using linear programming into an existing scheme for a system including a single kind of users, thereby enabling simultaneous execution of the adaptive modulation for all users in a system including two kinds of users. Further, the invention proposes another scheme of sequentially allocating subchannels to the users when the fixed transmission rate has a sufficiently small value, in order to reduce the complexity.

摘要翻译： 一种与RA问题有关的自适应调制方案，用于在包括一些需要以固定数据速率的业务的用户的OFDMA系统中最大化所有用户的最大传输速率的传输速率。 该方案提出了使用线性规划的自适应调制引入到包括单一用户的系统的现有方案中，从而能够在包括两种用户的系统中为所有用户同时执行自适应调制。 此外，为了降低复杂度，本发明提出了当固定传输速率具有足够小的值时向用户顺序分配子信道的另一方案。

公开(公告)号：US20050147024A1

公开(公告)日：2005-07-07

申请号：US10972034

申请日：2004-10-22

申请人： Young-Ho Jung ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Seung-Hoon Nam ,  Yong-Hoon Lee ,  Young-Doo Kim

发明人： Young-Ho Jung ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Seung-Hoon Nam ,  Yong-Hoon Lee ,  Young-Doo Kim

IPC分类号： H04J11/00 ,  H04B1/713 ,  H04L5/02 ,  H04L27/26

CPC分类号： H04L5/0007 ,  H04B1/713 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2655

摘要： A communication method in an FH-OFDM communication system having a plurality of BSs is provided. A predetermined number of pilot pattern groups are generated, each pilot pattern group having a predetermined number of different pilot patterns for pilot transmission. The pilot patterns in each of the pilot pattern groups are mapped to different FH sequence sets. The pilot patterns and FH sequence sets are assigned to the BSs so that MSs within the service areas of the BSs can identify the BSs.

摘要翻译： 提供了具有多个BS的FH-OFDM通信系统中的通信方法。 产生预定数量的导频模式组，每个导频模式组具有用于导频传输的预定数量的不同导频模式。 每个导频模式组中的导频模式映射到不同的FH序列集。 导频模式和FH序列集被分配给BS，使得BS的服务区域内的MS可以识别BS。

公开(公告)号：US10447437B2

公开(公告)日：2019-10-15

申请号：US11945141

申请日：2007-11-26

申请人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Ho-Jin Kim ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Il-Han Kim

发明人： Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Ho-Jin Kim ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Il-Han Kim

IPC分类号： H04L1/06 ,  H04L5/02 ,  H04L27/26

摘要： A method for assigning a single frequency sub-channel to a plurality of MSs (Mobile Stations) in an OFDM (Orthogonal Frequency Division Multiplexing) system utilizing SDM (Spatial Division Multiplexing) with multiple transmit/receive antennas. In the method, a BS (Base Station) can effectively assign a pilot channel to estimate a downlink channel. The BS divides the single frequency sub-channel into a plurality of spatial channels, and sequentially assigns the plurality of spatial channels to the MSs having the maximum communication capacity, thereby transmitting signals of the MSs through the single frequency sub-channel.

公开(公告)号：US07706351B2

公开(公告)日：2010-04-27

申请号：US11703266

申请日：2007-02-07

申请人： Cheol-Woo You ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Yung-Soo Kim

发明人： Cheol-Woo You ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Joo-Hwan Chun ,  Kyung-Chun Lee ,  Yung-Soo Kim

IPC分类号： H04B7/208

CPC分类号： H04L25/03343 ,  H04L5/023 ,  H04L25/0226 ,  H04L2025/03802

摘要： Disclosed is a method for transmitting an uplink signal by a mobile station in a mobile communication system using an OFDMA scheme. The method includes estimating a downlink channel status by using a signal received from a base station; determining a precoding matrix by using the estimated downlink channel status; and transmitting a signal obtained by multiplying an uplink signal to be transmitted by the precoding matrix to the base station.

摘要翻译： 公开了一种移动台在使用OFDMA方案的移动通信系统中发送上行链路信号的方法。 该方法包括：使用从基站接收的信号来估计下行链路信道状态; 通过使用所估计的下行链路信道状态来确定预编码矩阵; 并且将通过预编码矩阵发送的上行链路信号乘以基站而获得的信号。

公开(公告)号：US07532599B2

公开(公告)日：2009-05-12

申请号：US11374735

申请日：2006-03-14

申请人： Eung-Sun Kim ,  Jae-Sang Ham ,  Jong-Hyeuk Lee ,  Chung-Yong Lee ,  Sei-Joon Shim ,  Kyeong-Yeon Kim

发明人： Eung-Sun Kim ,  Jae-Sang Ham ,  Jong-Hyeuk Lee ,  Chung-Yong Lee ,  Sei-Joon Shim ,  Kyeong-Yeon Kim

IPC分类号： H04W4/00 ,  H04W72/00 ,  H04J11/00 ,  H03C7/02 ,  H04B1/02 ,  H04B7/02 ,  H04B17/02 ,  H04B1/00 ,  H04B7/00

CPC分类号： H04L1/0675 ,  H04L1/0003 ,  H04L1/0656

摘要： A user allocating apparatus and method in a multiple antenna mobile communication system supporting multi-user diversity is provided. Each user calculates effective Signal-to-Interference Noise Ratios (SINRs) and bit loading over every possible detection order and selects a detection order maximizing the number of channels with a minimum product of the minimum symbol distance of a modulation scheme and an effective SINR, thereby minimizing an average error probability. A base station receives detection orders from users and selects a user with a maximum detection order value. The base station then transmits data to the selected user using modulation schemes determined by the user for the transmit antennas.

摘要翻译： 提供了一种支持多用户分集的多天线移动通信系统中的用户分配装置和方法。 每个用户在每个可能的检测顺序上计算有效的信号与干扰噪声比（SINR）和比特加载，并且以调制方案和有效SINR的最小符号距离的最小乘积选择最大化信道数量的检测顺序， 从而使平均误差概率最小化。 基站接收用户的检测命令，并选择具有最大检测顺序值的用户。 然后，基站使用由用户为发射天线确定的调制方案向所选择的用户发送数据。