公开(公告)号：US07587172B2

公开(公告)日：2009-09-08

申请号：US11368726

申请日：2006-03-06

申请人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee ,  Jianjun Li

发明人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee ,  Jianjun Li

IPC分类号： H04B1/00 ,  H04B15/00

CPC分类号： H04B7/0452 ,  H04B7/0465 ,  H04B7/061 ,  H04B7/0634 ,  H04B7/0639 ,  H04L1/0003 ,  H04L1/0675

摘要： The present invention provides the multiuser Multiple-Input Multiple-Output (MIMO) systems with a feedback method which includes measuring, at the terminal, received Signal to Noise Ratios (SNRs) for all transmit antennas, selecting one of precoding matrixes, which has best SNRs, retrieving an index mapped to the selected preceding matrix from a predetermined mapping table, and transmitting the index with the SNRs of the selected precoding matrix. In the present invention, it is possible to reduce feedback information amount without degradation of the sum rate performance of the system since the feedback information is transmitted in a form of index implying appropriate precoding matrix and corresponding SNRs.

摘要翻译： 本发明提供了具有反馈方法的多用户多输入多输出（MIMO）系统，其包括在终端处测量所有发射天线的接收信噪比（SNR），选择最佳的预编码矩阵之一 SNR，从预定的映射表检索映射到所选择的先前矩阵的索引，以及使用所选择的预编码矩阵的SNR发送索引。 在本发明中，由于反馈信息以表示适当的预编码矩阵和对应的SNR的索引形式发送，所以可以减少反馈信息量而不降低系统的总和速率性能。

公开(公告)号：US20070253508A1

公开(公告)日：2007-11-01

申请号：US11785743

申请日：2007-04-19

申请人： Yong-Xing Zhou ,  Sung-Jin Kim ,  JianJun Li ,  Ho-Jin Kim

发明人： Yong-Xing Zhou ,  Sung-Jin Kim ,  JianJun Li ,  Ho-Jin Kim

IPC分类号： H04L1/02

CPC分类号： H04B7/0626 ,  H04L1/0026

摘要： An apparatus and method for selecting an effective channel in a multi-user MIMO system are provided, in which a receiver receives pilot signals from a transmitter, determines channel information indicating an antenna offering the best quality among a plurality of antennas using the pilot signals, and generates feedback information with the channel information, and the transmitter receives feedback information from a plurality of receivers, generates a channel matrix using the feedback information, and transmits data simultaneously to the plurality of receivers using the channel matrix.

摘要翻译： 提供了一种用于在多用户MIMO系统中选择有效信道的装置和方法，其中接收机从发射机接收导频信号，使用导频信号确定指示在多个天线中提供最佳质量的天线的信道信息， 并且生成具有信道信息的反馈信息，并且发送器从多个接收器接收反馈信息，使用反馈信息生成信道矩阵，并且使用信道矩阵同时向多个接收机发送数据。

公开(公告)号：US20060209980A1

公开(公告)日：2006-09-21

申请号：US11368726

申请日：2006-03-06

申请人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee ,  Jianjun Li

发明人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee ,  Jianjun Li

IPC分类号： H04L1/02

CPC分类号： H04B7/0452 ,  H04B7/0465 ,  H04B7/061 ,  H04B7/0634 ,  H04B7/0639 ,  H04L1/0003 ,  H04L1/0675

摘要： The present invention provides the multiuser Multiple-Input Multiple-Output (MIMO) systems with a feedback method which includes measuring, at the terminal, received Signal to Noise Ratios (SNRs) for all transmit antennas, selecting one of precoding matrixes, which has best SNRs, retrieving an index mapped to the selected preceding matrix from a predetermined mapping table, and transmitting the index with the SNRs of the selected precoding matrix. In the present invention, it is possible to reduce feedback information amount without degradation of the sum rate performance of the system since the feedback information is transmitted in a form of index implying appropriate precoding matrix and corresponding SNRs.

公开(公告)号：US07729442B2

公开(公告)日：2010-06-01

申请号：US11590015

申请日：2006-10-31

申请人： Sung-Jin Kim ,  Ho-Jin Kim ,  Ju-Ho Lee ,  Hwan-Joon Kwon ,  Jianjun Li ,  Yong-Xing Zhou ,  In-Soo Hwang ,  Kwang-Bok Lee

发明人： Sung-Jin Kim ,  Ho-Jin Kim ,  Ju-Ho Lee ,  Hwan-Joon Kwon ,  Jianjun Li ,  Yong-Xing Zhou ,  In-Soo Hwang ,  Kwang-Bok Lee

IPC分类号： H04L27/00

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0632 ,  H04B7/0643 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/03343 ,  H04L2025/03426

摘要： A method and system are provided for transmitting data in a multiple-input multiple-output (MIMO) communication system. A receiver sets the number of sub-streams of each column of a preceding matrix with respect to all precoding matrices of channels formed between the receiver and a transmitter and measures channel states with respect to sub-stream combinations whose number is equivalent to the number of set sub-streams. The receiver transmits data according to channel states to the transmitter after measuring the channel states with respect to the sub-stream combinations and antenna combinations representing sub-streams used upon data transmission of all the precoding matrices.

摘要翻译： 提供了一种用于在多输入多输出（MIMO）通信系统中传输数据的方法和系统。 接收机相对于在接收机和发射机之间形成的信道的所有预编码矩阵来设置前一矩阵的每列的子流的数量，并且针对子流组合测量相对于子数组合数的子流组合的信道状态 设置子流。 在测量关于子流组合的子信道状态的信道状态和表示在所有预编码矩阵的数据传输时使用的子流的天线组合之后，接收机根据信道状态向发射机发送数据。

公开(公告)号：US08098746B2

公开(公告)日：2012-01-17

申请号：US11763019

申请日：2007-06-14

申请人： Sung-Jin Kim ,  Ho-Jin Kim

发明人： Sung-Jin Kim ,  Ho-Jin Kim

IPC分类号： H04L27/28

CPC分类号： H04L1/0026 ,  H04B7/0417 ,  H04B7/043 ,  H04B7/0632 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/06 ,  H04L25/0204

摘要： An apparatus and method for transmitting/receiving data in a closed-loop multi-antenna system. A receiver receives a plurality of data streams from a plurality of transmit antennas of a transmitter, generates Channel Quality Information (CQIs) of channels that carry data streams transmitted from at least two transmit antenna allocated to the receiver among the plurality of transmit antennas, and transmits the CQIs to the transmitter. For the CQI generation, the receiver generates a channel matrix through channel estimation of the received data streams, generates a reception beamforming matrix from the channel matrix including only components of the data streams transmitted from the allocated transmit antennas, and calculates the CQIs using the channel matrix, the reception beamforming matrix, and a total signal-to-noise ratio (SNR) obtained through the channel estimation.

摘要翻译： 一种用于在闭环多天线系统中发送/接收数据的装置和方法。 接收机从发射机的多个发射天线接收多个数据流，产生载波从多个发射天线中分配给接收机的至少两个发射天线发射的数据流的信道的信道质量信息（CQI），以及 将CQI发送到发送机。 对于CQI生成，接收器通过对接收到的数据流的信道估计来生成信道矩阵，从仅包含从所分配的发送天线发送的数据流的分量的信道矩阵生成接收波束成形矩阵，并使用信道 矩阵，接收波束形成矩阵以及通过信道估计获得的总信噪比（SNR）。

公开(公告)号：US07769390B2

公开(公告)日：2010-08-03

申请号：US11059962

申请日：2005-02-17

申请人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee

发明人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee

IPC分类号： H04W72/00

CPC分类号： H04B7/0604 ,  H04B7/0452 ,  H04B7/0632 ,  H04B7/0822 ,  H04B7/0854

摘要： A method for transmitting and receiving data in a multiuser Multiple-Input Multiple-Output (MIMO) system including a base station connected to a plurality of user equipments. In the method, each of the user equipments separately calculates channel capacity information using a linear reception scheme and a nonlinear reception scheme, and feeds back the calculated channel capacity information to the base station. The base station separately calculates system capacities using at least two different antenna scheduling schemes based on the channel capacity information fed back from the user equipments, and allocates antennas to the user equipments using a selected antenna scheduling scheme having higher system capacity out of the two antenna scheduling schemes.

摘要翻译： 一种用于在包括连接到多个用户设备的基站的多用户多输入多输出（MIMO）系统中发送和接收数据的方法。 在该方法中，每个用户设备使用线性接收方式和非线性接收方式分别计算信道容量信息，并将计算出的信道容量信息反馈给基站。 基站基于从用户设备反馈的信道容量信息，使用至少两个不同的天线调度方案分别计算系统容量，并且使用在两个天线中具有较高系统容量的选定的天线调度方案向用户设备分配天线 调度方案

公开(公告)号：US07746947B2

公开(公告)日：2010-06-29

申请号：US11274662

申请日：2005-11-15

申请人： Sung-Jin Kim ,  Ho-Jin Kim ,  Kwang-Bok Lee ,  Ki-Ho Kim ,  Hyoung-Woon Park ,  Jae-Hak Chung ,  Chan-Byoung Chae ,  Won-Il Roh

发明人： Sung-Jin Kim ,  Ho-Jin Kim ,  Kwang-Bok Lee ,  Ki-Ho Kim ,  Hyoung-Woon Park ,  Jae-Hak Chung ,  Chan-Byoung Chae ,  Won-Il Roh

IPC分类号： H04B7/04

CPC分类号： H04B7/0617 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0452 ,  H04B7/0634

摘要： A multiple-input multiple-output (MIMO) communication system is provided for communication between a transmission apparatus having a plurality of transmission antennas and a reception apparatus having a plurality of reception antennas. The reception apparatus performs singular value decomposition (SVD) on channel information for a channel established to the transmission apparatus, and feeds back the SVD-decomposed channel information to the transmission apparatus. The transmission apparatus receives the SVD-decomposed channel information from the reception apparatus, performs QR decomposition on the received SVD-decomposed channel information, and sets multiple transmission antennas to be allocated to the channel, thereby performing beamforming.

摘要翻译： 提供了一种多输入多输出（MIMO）通信系统，用于具有多个发送天线的发送装置与具有多个接收天线的接收装置之间的通信。 接收装置对发送装置建立的信道的信道信息进行奇异值分解（SVD），并将SVD分解信道信息反馈给发送装置。 发送装置从接收装置接收SVD分解信道信息，对所接收的SVD分解信道信息进行QR分解，并设定要分配给信道的多个发送天线，从而进行波束形成。

公开(公告)号：US20050192019A1

公开(公告)日：2005-09-01

申请号：US11059962

申请日：2005-02-17

申请人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee

发明人： Ho-Jin Kim ,  Sung-Jin Kim ,  Kwang-Bok Lee

IPC分类号： H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/155 ,  H04J99/00 ,  H04M1/00

CPC分类号： H04B7/0604 ,  H04B7/0452 ,  H04B7/0632 ,  H04B7/0822 ,  H04B7/0854

摘要： A method for transmitting and receiving data in a multiuser Multiple-Input Multiple-Output (MIMO) system including a base station connected to a plurality of user equipments. In the method, each of the user equipments separately calculates channel capacity information using a linear reception scheme and a nonlinear reception scheme, and feeds back the calculated channel capacity information to the base station. The base station separately calculates system capacities using at least two different antenna scheduling schemes based on the channel capacity information fed back from the user equipments, and allocates antennas to the user equipments using a selected antenna scheduling scheme having higher system capacity out of the two antenna scheduling schemes.

摘要翻译： 一种用于在包括连接到多个用户设备的基站的多用户多输入多输出（MIMO）系统中发送和接收数据的方法。 在该方法中，每个用户设备使用线性接收方式和非线性接收方式分别计算信道容量信息，并将计算出的信道容量信息反馈给基站。 基站基于从用户设备反馈的信道容量信息，使用至少两个不同的天线调度方案分别计算系统容量，并且使用在两个天线中具有较高系统容量的选定的天线调度方案向用户设备分配天线 调度方案

公开(公告)号：US07941186B2

公开(公告)日：2011-05-10

申请号：US11782629

申请日：2007-07-24

申请人： Myeon-Kyun Cho ,  Sung-Jin Kim ,  Ho-Jin Kim ,  Cheol-Woo You

发明人： Myeon-Kyun Cho ,  Sung-Jin Kim ,  Ho-Jin Kim ,  Cheol-Woo You

IPC分类号： H04M1/00 ,  H04W4/00 ,  H04B7/216

CPC分类号： H04W72/085 ,  H04B7/0452 ,  H04B7/0632 ,  H04B7/0697 ,  H04L1/0026

摘要： An apparatus and method for scheduling a multiuser and a single user in a Multiple Input Multiple Output (MIMO) system are provided. The method for scheduling a multiuser and a single user at BS in MIMO system includes determining ratios of MultiUser-MIMO (MU-MIMO) chunks and Single User-MIMO (SU-MIMO) chunks to allocation chunks, determining the MU-MIMO chunks in the determined ratio and the remaining chunks as the SU-MIMO chunks, transmitting chunk information relating to the determined chunks to one or more Mobile Stations (MSs), and, when Channel Quality Information (CQI) feedback information relating to the determined MU-MIMO chunks and the determined SU-MIMO chunks is received from the MSs, allocating chunks and streams for MU-MIMO/SU-MIMO to users who maximize overall capacity using the CQI feedback information.

摘要翻译： 提供了一种用于在多输入多输出（MIMO）系统中调度多用户和单个用户的装置和方法。 在MIMO系统中在BS处调度多用户和单个用户的方法包括：将多用户MIMO（MU-MIMO）块和单用户MIMO（SU-MIMO）块的比率确定为分组块，确定MU-MIMO块中的MU-MIMO块 确定的比率和剩余的块作为SU-MIMO块，将与所确定的块相关的块信息发送到一个或多个移动站（MS），以及当与确定的MU-MIMO相关的信道质量信息（CQI）反馈信息 块，并且从MS接收确定的SU-MIMO块，将用于MU-MIMO / SU-MIMO的块和流分配给使用CQI反馈信息最大化总体容量的用户。

公开(公告)号：US20070286304A1

公开(公告)日：2007-12-13

申请号：US11802775

申请日：2007-05-24

申请人： Ho-Jin Kim ,  Il-Han Kim ,  David Love ,  Seung-Young Park ,  Sung-Jin Kim ,  Yong-Xing Zhou

发明人： Ho-Jin Kim ,  Il-Han Kim ,  David Love ,  Seung-Young Park ,  Sung-Jin Kim ,  Yong-Xing Zhou

IPC分类号： H04Q7/00 ,  H04B7/02 ,  H04L1/02

CPC分类号： H04B7/0452 ,  H04L1/0002 ,  H04L25/03343 ,  H04L2025/03426

摘要： Provided are a data transmitting and receiving method for a multiple-input multiple-output (MIMO) communication system, and a transmitter and a receiver using the method. Accordingly, since precoding matrices of a codebook is constituted using a rotation matrix, expansion of the codebook is easy, and since each of the precoding matrices is determined according to the number of transmit antennas, the codebook is systematically created according to a system. In addition the codebook can be applied to even a correlated channel, and the minimum distance between precoding matrices can advantageously be maximized.

摘要翻译： 提供了一种用于多输入多输出（MIMO）通信系统的数据发送和接收方法，以及使用该方法的发送器和接收器。 因此，由于使用旋转矩阵构成码本的预编码矩阵，因此码本的扩展容易，并且由于根据发送天线的数量来确定每个预编码矩阵，所以根据系统系统地创建码本。 此外，码本可以应用于甚至相关信道，并且预编码矩阵之间的最小距离可以有利地被最大化。