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    APPARATUS AND METHOD FOR SELECTING CODING SCHEME IN A MIMO SYSTEM
    1.
    发明申请
    APPARATUS AND METHOD FOR SELECTING CODING SCHEME IN A MIMO SYSTEM 审中-公开
    在MIMO系统中选择编码方案的装置和方法

    公开(公告)号：US20080013642A1

    公开(公告)日：2008-01-17

    申请号：US11777361

    申请日：2007-07-13

    申请人： Seung-Hoon Nam ,  Dae-Young Park ,  Chung-Yong Lee ,  Jae-Sang Ham ,  Kyeong-Yeon Kim ,  Bal-Geum Chol

    发明人： Seung-Hoon Nam ,  Dae-Young Park ,  Chung-Yong Lee ,  Jae-Sang Ham ,  Kyeong-Yeon Kim ,  Bal-Geum Chol

    IPC分类号： H04B7/02

    CPC分类号： H04B7/0619 ,  H04B7/0669 ,  H04B7/0673 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0625

    摘要： An apparatus and method for selecting a Space-Time Coding (STC) scheme in a Multiple-Input Multiple-Output (MIMO) system are provided. Upon generation of a data transmission event, a transmitter receives a feedback signal, encodes transmission data using an STC scheme indicated by the feedback signal, and transmits the code symbols to a receiver, and the receiver measures interference factors of available STC schemes using the received code symbols, selects an STC scheme with a smaller interference factor, and notifies the transmitter of the selected STC scheme by a feedback signal.

    摘要翻译： 提供了一种用于在多输入多输出（MIMO）系统中选择时空编码（STC）方案的装置和方法。 在生成数据传输事件时，发射机接收反馈信号，使用由反馈信号指示的STC方案对传输数据进行编码，并将代码符号发送到接收机，并且接收机使用接收到的方法来测量可用STC方案的干扰因子 代码符号，选择具有较小干扰因子的STC方案，并通过反馈信号向发射机通知所选择的STC方案。

    Apparatus and method for eliminating multi-user interference
    2.
    发明申请
    Apparatus and method for eliminating multi-user interference 有权
    消除多用户干扰的装置和方法

    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。

    Apparatus and method for eliminating multi-user interference
    3.
    发明授权
    Apparatus and method for eliminating multi-user interference 有权
    消除多用户干扰的装置和方法

    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。

    Apparatus and method for scheduling resources in a multiantenna system
    4.
    发明授权
    Apparatus and method for scheduling resources in a multiantenna system 有权
    多天线系统中调度资源的装置和方法

    公开(公告)号：US07630380B2

    公开(公告)日：2009-12-08

    申请号：US11392407

    申请日：2006-03-29

    申请人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

    发明人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

    IPC分类号： H04L12/28

    CPC分类号： H04W72/1257 ,  H04B7/0452 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0075 ,  H04W72/1231

    摘要： Provided is a scheduling apparatus and method for allocating resources to individual users in a multiantenna system. The method includes determining a ratio of time slots to be allocated according to a ratio desired by each of the terminals in every specific time slot interval, calculating a channel capacity average and a standard deviation for each terminal according to channel capacity reported from each terminal for a specific time, and determining, based on the determined ratio of time slots, a terminal to which a specific time slot is to be allocated according to the channel capacity average and the standard deviation, calculated for each terminal, and the last reported channel capacity.

    摘要翻译： 提供了一种用于在多天线系统中向各个用户分配资源的调度装置和方法。 该方法包括根据每个特定时隙间隔中的每个终端所期望的比率来确定要分配的时隙的比率，根据从每个终端报告的信道容量来计算每个终端的信道容量平均值和标准偏差 并且根据所确定的时隙比例，根据对每个终端计算的信道容量平均值和标准偏差以及最后报告的信道容量来确定要分配特定时隙的终端 。

    Apparatus and method for scheduling resources in a multiantenna system
    5.
    发明申请
    Apparatus and method for scheduling resources in a multiantenna system 有权
    多天线系统中调度资源的装置和方法

    公开(公告)号：US20060268814A1

    公开(公告)日：2006-11-30

    申请号：US11392407

    申请日：2006-03-29

    申请人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

    发明人： Jae-Hak Chung ,  Ji-Won Kang ,  Ye-Hoon Lee ,  Seung-Hoon Nam ,  Chung-Yong Lee ,  Hak-Ju Lee

    IPC分类号： H04B7/212

    CPC分类号： H04W72/1257 ,  H04B7/0452 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0075 ,  H04W72/1231

    摘要： Provided is a scheduling apparatus and method for allocating resources to individual users in a multiantenna system. An upper layer determines resources to allocate to respective users one a long term, and provides the ratio to a scheduler. Then the scheduler determines coefficients appropriate for the provided ratio. On the assumption that a statistical channel characteristic for a user is constant for a predetermined time, the scheduler determines a channel capacity average and a standard deviation for the user. The scheduler schedules resource allocation for individual users according to the channel capacity average and standard deviation values, which are the statistical characteristic values, and instantaneous channel capacity fed back for the individual users, together with the found coefficients.

    摘要翻译： 提供了一种用于在多天线系统中向各个用户分配资源的调度装置和方法。 上层确定长期分配给相应用户的资源，并将比例提供给调度器。 然后调度器确定适合所提供的比率的系数。 假设用户的统计信道特性在预定时间内是恒定的，则调度器确定用户的信道容量平均值和标准偏差。 调度器根据作为统计特征值的信道容量平均值和标准差值，以及针对各个用户反馈的瞬时信道容量，连同所找到的系数，为个体用户调度资源分配。

    Apparatus and method for performing channel estimation in an orthogonal frequency division multiplexing (OFDM) system using multiple antennas
    6.
    发明授权
    Apparatus and method for performing channel estimation in an orthogonal frequency division multiplexing (OFDM) system using multiple antennas 有权
    在使用多个天线的正交频分复用（OFDM）系统中执行信道估计的装置和方法

    公开(公告)号：US07388920B2

    公开(公告)日：2008-06-17

    申请号：US10726118

    申请日：2003-12-02

    申请人： Seung-Hoon Nam ,  Chung-Yong Lee ,  Myeong-Cheol Shin

    发明人： Seung-Hoon Nam ,  Chung-Yong Lee ,  Myeong-Cheol Shin

    IPC分类号： H04L27/28 ,  H04L27/00 ,  H04J11/00

    CPC分类号： H04L1/06 ,  H04L25/0236

    摘要： An apparatus and method for performing channel estimation in an OFDM (Orthogonal Frequency Division Multiplexing) system using multiple antennas, and a method for performing channel estimation using received sub-carriers in an OFDM system for receiving a sub-carrier having a training symbol and another sub-carrier having no training symbol comprising the steps of: a) differently setting a weight associated with a reliability of the sub-carrier having the training symbol and a weight associated with a reliability of the sub-carrier having no training symbol, b) measuring channel estimation errors associated with individual received sub-carriers, and c) performing channel estimation using the measured channel estimation errors and the set weights.

    摘要翻译： 一种在使用多个天线的OFDM（正交频分复用）系统中进行信道估计的装置和方法，以及一种在OFDM系统中使用接收到的子载波进行信道估计的方法，用于接收具有训练符号的子载波和另一个 没有训练符号的子载波包括以下步骤：a）不同地设置与具有训练符号的子载波的可靠性相关联的权重和与没有训练符号的子载波的可靠性相关联的加权，b） 测量与各个接收的子载波相关联的信道估计误差，以及c）使用测量的信道估计误差和所设置的权重来执行信道估计。

    Transmission apparatus and method for MIMO system
    7.
    发明授权
    Transmission apparatus and method for MIMO system 有权
    MIMO系统的传输装置和方法

    公开(公告)号：US08050356B2

    公开(公告)日：2011-11-01

    申请号：US11345717

    申请日：2006-02-02

    申请人： Seung-Hoon Nam ,  Chan-Soo Hwang ,  Jae-Hak Chung ,  Young-Ho Jung ,  Won-Il Roh ,  Chan-Byoung Chae

    发明人： Seung-Hoon Nam ,  Chan-Soo Hwang ,  Jae-Hak Chung ,  Young-Ho Jung ,  Won-Il Roh ,  Chan-Byoung Chae

    IPC分类号： H04L27/00

    CPC分类号： H04B7/0689 ,  H04B7/0691 ,  H04B7/0871 ,  H04B7/0874 ,  H04L1/0071 ,  H04L1/06

    摘要： A transmitter in a multiple input multiple output (MIMO) communication system is provided. The transmitter includes a multiplexer for multiplexing an input bit stream into a plurality of bit streams, and outputting the bit streams in parallel; a bit-order rearranger for reordering bits constituting the bit streams, which are output from the multiplexer in the same time period, and outputting the reordered bits as reordered bit streams; and a modulator for modulating the parallel reordered bit streams output from the bit-order rearranger according to their associated modulation schemes, and transmitting the modulated symbols via their associated antennas.

    摘要翻译： 提供了一种多输入多输出（MIMO）通信系统中的发射机。 发射机包括多路复用器，用于将输入比特流复用成多个比特流，并且并行地输出比特流; 用于重新排序构成比特流的比特序列重排器，其在同一时间段内从多路复用器输出，并将重新排序的比特输出为重新排序的比特流; 以及调制器，用于根据它们相关联的调制方案来调制从位顺序重排器输出的并行重排序比特流，以及经由其相关天线发送调制符号。

    Transmission method for OFDM-MIMO communication system
    9.
    发明授权
    Transmission method for OFDM-MIMO communication system 有权
    OFDM-MIMO通信系统的传输方法

    公开(公告)号：US07623588B2

    公开(公告)日：2009-11-24

    申请号：US11235395

    申请日：2005-09-26

    申请人： Chang-Soon Park ,  Kwang-Bok Lee ,  Seung-Hoon Nam ,  Koo-Chul Jung

    发明人： Chang-Soon Park ,  Kwang-Bok Lee ,  Seung-Hoon Nam ,  Koo-Chul Jung

    IPC分类号： H04B7/02 ,  H04L1/02

    CPC分类号： H04B7/0626 ,  H04B7/066 ,  H04B7/0669 ,  H04L1/0003 ,  H04L1/0618 ,  H04L1/0675 ,  H04L25/0204 ,  H04L27/2608 ,  Y02D70/444

    摘要： A data transmission method in a MIMO-OFDM communication system including at least one receiver for receiving a signal through a plurality of reception antennas and a transmitter for selecting a transmission channel using channel information being fed back from the receiver and transmitting a signal through a plurality of transmission antennas. The method includes selecting a spatial subchannel in which when bits are added by applying at least two spatial modes having different multiplexing gains for an individual subcarrier in a frequency domain, the minimum power increment is required during application of each spatial mode; allocating a spatial mode that requires the minimum total accumulated power, for each subcarrier; and selecting all subcarriers in the order of a subcarrier that requires the minimum power increment.

    摘要翻译： 一种MIMO-OFDM通信系统中的数据传输方法，包括：至少一个接收机，用于通过多个接收天线接收信号;以及发射机，使用从接收机反馈的信道信息，并通过多个接收天线发送信号 的发射天线。 该方法包括选择空间子信道，其中当通过对频域中的各个子载波应用具有不同复用增益的至少两个空间模式来加上比特时，在每个空间模式的应用期间需要最小功率增量; 为每个子载波分配需要最小总累积功率的空间模式; 并按照需要最小功率增量的子载波的顺序选择所有子载波。