公开(公告)号：US08204142B2

公开(公告)日：2012-06-19

申请号：US12021488

申请日：2008-01-29

申请人： In-Soo Hwang ,  Jong-Hyung Kwun ,  Sei-Joon Shim ,  Chan-Byoung Chae ,  Robert Heath, Jr.

发明人： In-Soo Hwang ,  Jong-Hyung Kwun ,  Sei-Joon Shim ,  Chan-Byoung Chae ,  Robert Heath, Jr.

IPC分类号： H04B7/02

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0439 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0639

摘要： A precoder and a precoding method in a multiuser multi-antenna system are provided. The precoder includes a channel checker for determining a DownLink (DL) channel condition of terminals in a service coverage area, a pre-compensator for pre-compensating, for channel distortion, signals to be sent to the terminals when a nonlinear algorithm is selected based on the channel condition of the terminals, and an interference remover for canceling interference in a channel by multiplying the pre-compensated signals by inverse channels of the terminals, and for canceling interference between the terminals. Accordingly, the pre-equalization can be carried out without global channel state information, and an increase of the transmit power can be prevented in the permutation.

摘要翻译： 提供了一种多用户多天线系统中的预编码器和预编码方法。 预编码器包括用于确定服务覆盖区域中的终端的下行链路（DL）信道状态的信道检查器，用于预补偿的预补偿器，用于信道失真，当基于非线性算法被选择时要发送到终端的信号 在终端的信道条件下，以及干扰去除器，用于通过将预补偿信号乘以终端的反向信道来消除信道中的干扰，并用于消除终端之间的干扰。 因此，可以在没有全局信道状态信息的情况下执行预均衡，并且可以在排列中防止发送功率的增加。

公开(公告)号：US20060203777A1

公开(公告)日：2006-09-14

申请号：US11374735

申请日：2006-03-14

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

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

IPC分类号： H04Q7/00 ,  H04L1/02 ,  H04B1/02 ,  H04B17/02

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.

公开(公告)号：US20070155336A1

公开(公告)日：2007-07-05

申请号：US11601049

申请日：2006-11-17

申请人： Seung-Hoon Nam ,  Myeon-Kyun Cho ,  Yung-Soo Kim ,  Sei-Joon Shim ,  Kyeong-Yeon Kim ,  Chung-Yong Lee

发明人： Seung-Hoon Nam ,  Myeon-Kyun Cho ,  Yung-Soo Kim ,  Sei-Joon Shim ,  Kyeong-Yeon Kim ,  Chung-Yong Lee

IPC分类号： H04B7/00 ,  H04M1/00

CPC分类号： H04B7/0408 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0634 ,  H04B7/0639

摘要： Provided are an apparatus and method for eliminating multi-user interference in a codebook-based beamforming system. A transmitter for providing a service to multi-users in the codebook-based beamforming system includes a beamformer for generating beamformed user signals by multiplying transmit data of users, to whom the service is to be provided, by corresponding weighting factor vectors using feedback information; a null space generator for generating a null space matrix orthogonal to weighting factor vectors of other users; and a projector for projecting the beamformed user signals on the corresponding null space matrix and transmitting the resulting signals through a plurality of antennas. Because the multi-user signals can maintain orthogonality, the performance degradation caused by the multi-user interference can be prevented.

摘要翻译： 提供了一种用于消除基于码本的波束成形系统中的多用户干扰的装置和方法。 用于在基于码本的波束成形系统中为多用户提供服务的发射机包括波束形成器，用于通过使用反馈信息将相应的加权因子向量乘以要提供服务的用户的发送数据来生成波束形成的用户信号; 零空间生成器，用于生成与其他用户的加权因子矢量正交的零空间矩阵; 以及用于将波束形成的用户信号投影在相应的零空间矩阵上并通过多个天线发送所得到的信号的投影仪。 因为多用户信号可以保持正交性，所以可以防止由多用户干扰引起的性能下降。

公开(公告)号：US08467729B2

公开(公告)日：2013-06-18

申请号：US12717497

申请日：2010-03-04

申请人： Sei-Joon Shim ,  Eun-Jung Kim ,  Jae-Kon Lee ,  Sang-Boh Yun

发明人： Sei-Joon Shim ,  Eun-Jung Kim ,  Jae-Kon Lee ,  Sang-Boh Yun

IPC分类号： H04B1/00

CPC分类号： H04W52/42 ,  H04B7/0452 ,  H04B7/0665 ,  H04B7/0862 ,  H04L25/03891 ,  H04L25/03993 ,  H04W52/343 ,  H04W52/346

摘要： A method and an apparatus are provided for eliminating multi-user interference in a multi-antenna system. In a BS, precoding vector information of at least one interfering user terminal interfering with a user terminal and information about a ratio of the transmission (TX) power of the user terminal to the total TX power of the BS are detected. A control signal including the detected information is transmitted to the user terminal.

摘要翻译： 提供一种用于消除多天线系统中的多用户干扰的方法和装置。 在BS中，检测到干扰用户终端的至少一个干扰用户终端的预编码矢量信息和关于用户终端的发射（TX）功率与BS的总TX功率的比率的信息。 包括检测到的信息的控制信号被发送到用户终端。

公开(公告)号：US07907912B2

公开(公告)日：2011-03-15

申请号：US11601049

申请日：2006-11-17

申请人： Seung-Hoon Nam ,  Myeon-Kyun Cho ,  Yung-Soo Kim ,  Sei-Joon Shim ,  Kyeong-Yeon Kim ,  Chung-Yong Lee

发明人： Seung-Hoon Nam ,  Myeon-Kyun Cho ,  Yung-Soo Kim ,  Sei-Joon Shim ,  Kyeong-Yeon Kim ,  Chung-Yong Lee

IPC分类号： H04B17/00

CPC分类号： H04B7/0408 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0634 ,  H04B7/0639

摘要： Provided are an apparatus and method for eliminating multi-user interference in a codebook-based beamforming system. A transmitter for providing a service to multi-users in the codebook-based beamforming system includes a beamformer for generating beamformed user signals by multiplying transmit data of users, to whom the service is to be provided, by corresponding weighting factor vectors using feedback information; a null space generator for generating a null space matrix orthogonal to weighting factor vectors of other users; and a projector for projecting the beamformed user signals on the corresponding null space matrix and transmitting the resulting signals through a plurality of antennas. Because the multi-user signals can maintain orthogonality, the performance degradation caused by the multi-user interference can be prevented.

摘要翻译： 提供了一种用于消除基于码本的波束成形系统中的多用户干扰的装置和方法。 用于在基于码本的波束成形系统中为多用户提供服务的发射机包括波束形成器，用于通过使用反馈信息将相应的加权因子向量乘以要提供服务的用户的发送数据来生成波束形成的用户信号; 零空间生成器，用于生成与其他用户的加权因子矢量正交的零空间矩阵; 以及用于将波束形成的用户信号投影在相应的零空间矩阵上并通过多个天线发送所得到的信号的投影仪。 因为多用户信号可以保持正交性，所以可以防止由多用户干扰引起的性能下降。

公开(公告)号：US20090262719A1

公开(公告)日：2009-10-22

申请号：US12386300

申请日：2009-04-16

申请人： Sei-Joon Shim ,  Dong-Hee Kang ,  Tai-Suk Kim

发明人： Sei-Joon Shim ,  Dong-Hee Kang ,  Tai-Suk Kim

IPC分类号： H04B7/216 ,  H03D1/00

CPC分类号： H04B7/0452 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0697

摘要： Beamforming in a Multiple Input Multiple Output (MIMO) wireless communication system is provided. An apparatus includes an estimator for estimating a channel matrix of at least one terminal compliant with a Time Division Duplex (TDD) scheme; a processor for confirming information indicative of a channel matrix fed back from at least one terminal compliant with a Frequency Division Duplex (FDD) scheme; and a controller for determining precoding vectors or terminals to be connected in a spatial multiple access manner, using the channel matrix of the at least one terminal compliant with the TDD scheme and a principal vector of the at least one terminal compliant with the FDD scheme.

摘要翻译： 提供了多输入多输出（MIMO）无线通信系统中的波束成形。 一种装置包括估计器，用于估计符合时分双工（TDD）方案的至少一个终端的信道矩阵; 用于确认指示从符合频分双工（FDD）方案的至少一个终端反馈的信道矩阵的信息的处理器; 以及控制器，用于使用符合TDD方案的至少一个终端的信道矩阵和符合FDD方案的至少一个终端的主向量来确定要以空间多址方式连接的预编码向量或终端。

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。

公开(公告)号：US20050031062A1

公开(公告)日：2005-02-10

申请号：US10830360

申请日：2004-04-22

申请人： Sei-Joon Shim ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Chung-Yong Lee

发明人： Sei-Joon Shim ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Chung-Yong Lee

IPC分类号： H04L1/00 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/26 ,  H04J99/00 ,  H04L1/06 ,  H04B7/216

CPC分类号： H04B7/0417 ,  H04B7/061 ,  H04B7/0634 ,  H04B7/0673 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/082 ,  H04L1/0618

摘要： A method and apparatus for determining a shuffling pattern in a DSTTD. In the apparatus, a channel estimator estimates channel characteristics from a plurality of transmit antennas to a plurality of receive antennas. A shuffling pattern selector calculates a minimum receive SNR for each of all available shuffling patterns, and selects a shuffling pattern having the largest minimum receive SNR as the optimum shuffling pattern. This efficient shuffling pattern selection directly improves BER performance at a receiver.

摘要翻译： 一种用于确定DSTTD中的混洗图案的方法和装置。 在该装置中，信道估计器估计从多个发射天线到多个接收天线的信道特性。 混洗图案选择器针对所有可用的混洗图案中的每一个计算最小接收SNR，并且选择具有最大最小接收SNR的混洗图案作为最佳混洗图案。 这种高效的混洗模式选择直接改善了接收机的BER性能。