公开(公告)号：US09130612B2

公开(公告)日：2015-09-08

申请号：US12349232

申请日：2009-01-06

申请人： Byoung-Hoon Kim ,  Taesang Yoo

发明人： Byoung-Hoon Kim ,  Taesang Yoo

IPC分类号： H04L27/28 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0413 ,  H04B7/0619 ,  H04B7/0671

摘要： Systems and methodologies are described that facilitate creating a unified format that can accommodate various MIMO modes. The unified format can employed with a single payload size that includes uplink control information for each available MIMO mode. By packaging the payload with uplink control information related to each MIMO mode, the uplink control information can be utilized with any suitable or available MIMO mode.

摘要翻译： 描述了有助于创建可以适应各种MIMO模式的统一格式的系统和方法。 统一格式可以采用单个有效载荷大小，其包括每个可用MIMO模式的上行链路控制信息。 通过利用与每个MIMO模式相关的上行链路控制信息封装有效载荷，可以利用任何合适的或可用的MIMO模式来利用上行链路控制信息。

公开(公告)号：US08849353B2

公开(公告)日：2014-09-30

申请号：US11796328

申请日：2007-04-27

申请人： Gerard J. Foschini ,  Taesang Yoo

发明人： Gerard J. Foschini ,  Taesang Yoo

IPC分类号： H04M1/00 ,  H04B7/04

CPC分类号： H04B7/043 ,  H04B7/0452 ,  H04B7/0465 ,  H04W52/346 ,  H04W72/082

摘要： In a system of MIMO communications in a wireless network, a number of wireless units are logically divided into a plurality of user groups, through operation of a semi-orthogonal user selection sub-system. For example, the user selection sub-system may implement a heuristic user selection algorithm based on near-orthogonality. Each user group is assigned a discrete transmission channel, which may be orthogonally defined in terms of frequency, time, or code. Data is transmitted over the channels (e.g., from network base stations) in a coherently coordinated manner, according to a zero-forcing beamforming operation. The system may be configured for operation in a time/frequency selective manner, e.g., over time/frequency selective fading channels. The wireless units may be allocated to the time/frequency slots based on prioritization of channel strength and considerations of fairness, in conjunction with the application of a semi-orthogonal user selection algorithm.

摘要翻译： 在无线网络中的MIMO通信系统中，通过半正交用户选择子系统的操作，将多个无线单元在逻辑上划分成多个用户组。 例如，用户选择子系统可以实现基于近正交性的启发式用户选择算法。 每个用户组被分配离散的传输信道，其可以根据频率，时间或代码来正交地定义。 根据迫零波束成形操作，以相干协调的方式通过信道（例如，来自网络基站）发送数据。 该系统可以被配置为以时间/频率选择性方式操作，例如，随着时间/频率选择性衰落信道。 结合半正交用户选择算法的应用，无线单元可以基于信道强度的优先级和公平性的考虑来分配给时间/频率时隙。

公开(公告)号：US20120034926A1

公开(公告)日：2012-02-09

申请号：US13023432

申请日：2011-02-08

申请人： Aleksandar Damnjanovic ,  Taesang Yoo

发明人： Aleksandar Damnjanovic ,  Taesang Yoo

IPC分类号： H04W72/04 ,  H04W24/00 ,  H04W92/00 ,  H04B15/00 ,  H04B7/24

CPC分类号： H04W72/085 ,  H04B7/022 ,  H04B7/0626 ,  H04B17/24 ,  H04L1/0026 ,  H04W52/281 ,  H04W52/40 ,  H04W72/082

摘要： When enabled with common reference signal interference cancellation, a user equipment (UE) may still compute a channel state feedback value with consideration of any canceled interfering neighboring signals. When the neighboring cells are determined to be transmitting data during the time for which the channel state feedback value is being computed, the UE is able to derive the channel state feedback value considering those canceled interfering signals. The UE determines whether each neighboring cell is transmitting during the designated time either by obtaining signals that indicate the transmission schedule of the neighboring cells or by detecting the transmission schedule, such as based on the power class of the neighboring cells. If the UE determines that the neighboring cells are transmitting data during this time period, the UE will compute the channel state feedback value including consideration of the canceled interfering signals.

摘要翻译： 当使用公共参考信号干扰消除时，用户设备（UE）仍可以考虑任何取消的干扰相邻信号来计算信道状态反馈值。 当在正在计算信道状态反馈值的时间内确定相邻小区正在发送数据时，UE能够导出考虑到那些被消除的干扰信号的信道状态反馈值。 UE通过获得指示相邻小区的传输调度的信号或者通过基于相邻小区的功率等级来检测传输调度来确定在指定时间期间每个相邻小区是否正在发射。 如果UE在该时间段期间确定相邻小区正在发送数据，则UE将计算包括考虑被消除的干扰信号的信道状态反馈值。

公开(公告)号：US20100040179A1

公开(公告)日：2010-02-18

申请号：US12191427

申请日：2008-08-14

申请人： Taesang Yoo ,  Yongbin Wei ,  Peter Gaal

发明人： Taesang Yoo ,  Yongbin Wei ,  Peter Gaal

IPC分类号： H04B1/10

CPC分类号： H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03522

摘要： Aspects describe channel estimation in an OFDM system. Baseline DFT-based channel estimation can be performed and scaling can be applied to mitigate distortion in the DFT-based estimations. In some aspects, baseline DFT-based channel estimation can be performed and tones for which DFT-based estimate is deemed unreliable can have MMSE based processing applied locally. If orthogonal sequence is deemed excessive, orthogonal sequence cancellation can be applied prior to the MMSE based processing.

摘要翻译： 方面描述OFDM系统中的信道估计。 可以执行基于基于DFT的信道估计，并且可以应用缩放来减轻基于DFT的估计中的失真。 在一些方面，可以执行基于基于DFT的信道估计，并且基于DFT的估计被认为不可靠的音调可以在本地应用基于MMSE的处理。 如果认为正交序列过大，则可以在基于MMSE的处理之前应用正交序列消除。

公开(公告)号：US08515440B2

公开(公告)日：2013-08-20

申请号：US13023432

申请日：2011-02-08

申请人： Aleksandar Damnjanovic ,  Taesang Yoo

发明人： Aleksandar Damnjanovic ,  Taesang Yoo

IPC分类号： H04W72/00

CPC分类号： H04W72/085 ,  H04B7/022 ,  H04B7/0626 ,  H04B17/24 ,  H04L1/0026 ,  H04W52/281 ,  H04W52/40 ,  H04W72/082

摘要： When enabled with common reference signal interference cancellation, a user equipment (UE) may still compute a channel state feedback value with consideration of any canceled interfering neighboring signals. When the neighboring cells are determined to be transmitting data during the time for which the channel state feedback value is being computed, the UE is able to derive the channel state feedback value considering those canceled interfering signals. The UE determines whether each neighboring cell is transmitting during the designated time either by obtaining signals that indicate the transmission schedule of the neighboring cells or by detecting the transmission schedule, such as based on the power class of the neighboring cells. If the UE determines that the neighboring cells are transmitting data during this time period, the UE will compute the channel state feedback value including consideration of the canceled interfering signals.

摘要翻译： 当使用公共参考信号干扰消除时，用户设备（UE）仍可以考虑任何取消的干扰相邻信号来计算信道状态反馈值。 当在正在计算信道状态反馈值的时间内确定相邻小区正在发送数据时，UE能够导出考虑到那些被消除的干扰信号的信道状态反馈值。 UE通过获得指示相邻小区的传输调度的信号或者通过基于相邻小区的功率等级来检测传输调度来确定在指定时间期间每个相邻小区是否正在发射。 如果UE在该时间段期间确定相邻小区正在发送数据，则UE将计算包括考虑被消除的干扰信号的信道状态反馈值。

公开(公告)号：US08094760B2

公开(公告)日：2012-01-10

申请号：US12191427

申请日：2008-08-14

申请人： Taesang Yoo ,  Yongbin Wei ,  Peter Gaal

发明人： Taesang Yoo ,  Yongbin Wei ,  Peter Gaal

IPC分类号： H04B1/10

CPC分类号： H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03522

摘要： Aspects describe channel estimation in an OFDM system. Baseline DFT-based channel estimation can be performed and scaling can be applied to mitigate distortion in the DFT-based estimations. In some aspects, baseline DFT-based channel estimation can be performed and tones for which DFT-based estimate is deemed unreliable can have MMSE based processing applied locally. If orthogonal sequence is deemed excessive, orthogonal sequence cancellation can be applied prior to the MMSE based processing.

摘要翻译： 方面描述OFDM系统中的信道估计。 可以执行基于基于DFT的信道估计，并且可以应用缩放来减轻基于DFT的估计中的失真。 在一些方面，可以执行基于基于DFT的信道估计，并且基于DFT的估计被认为不可靠的音调可以在本地应用基于MMSE的处理。 如果认为正交序列过大，则可以在基于MMSE的处理之前应用正交序列消除。

公开(公告)号：US08588319B2

公开(公告)日：2013-11-19

申请号：US12444499

申请日：2007-11-06

申请人： Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Taesang Yoo

发明人： Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Taesang Yoo

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04B7/065 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0628 ,  H04B7/0641 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0656 ,  H04L1/1812

摘要： Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

摘要翻译： 描述了支持具有层置换的MIMO传输的技术。 在一个方面，可以生成多个码字用于从多个天线（例如，虚拟天线）的发射，其中码字的数量小于天线的数量。 每个码字可以跨多个天线映射。 可以生成两个码字。 对于秩3，第一码字可以映射到一个层（或每个子载波上的一个天线），并且第二码字可以映射到两个层（或每个子载波上的两个天线）。 对于等级4，每个码字可以映射到两个层。 另一方面，可以确定表示平均信号质量的基本CQI。 也可以确定表示对平均信号质量的改善的增量CQI。 在另一方面，可以针对不同等级或码字数量对不同的惩罚因素进行选择。

公开(公告)号：US20100027697A1

公开(公告)日：2010-02-04

申请号：US12444499

申请日：2007-11-06

申请人： Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Taesang Yoo

发明人： Durga Prasad Malladi ,  Byoung-Hoon Kim ,  Taesang Yoo

IPC分类号： H04L27/28 ,  H04L27/00

CPC分类号： H04B7/065 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0628 ,  H04B7/0641 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0656 ,  H04L1/1812

摘要： Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

摘要翻译： 描述了用于支持具有层置换的MIMO传输的技术。 在一个方面，可以生成多个码字用于从多个天线（例如，虚拟天线）的发射，其中码字的数量小于天线的数量。 每个码字可以跨多个天线映射。 可以生成两个码字。 对于秩3，第一码字可以映射到一个层（或每个子载波上的一个天线），并且第二码字可以映射到两个层（或每个子载波上的两个天线）。 对于等级4，每个码字可以映射到两个层。 另一方面，可以确定表示平均信号质量的基本CQI。 也可以确定表示对平均信号质量的改善的增量CQI。 在另一方面，可以针对不同等级或码字数量对不同的惩罚因素进行选择。

公开(公告)号：US20090180561A1

公开(公告)日：2009-07-16

申请号：US12349232

申请日：2009-01-06

申请人： Byoung-Hoon Kim ,  Taesang Yoo

发明人： Byoung-Hoon Kim ,  Taesang Yoo

IPC分类号： H04L27/28

CPC分类号： H04B7/0413 ,  H04B7/0619 ,  H04B7/0671

摘要： Systems and methodologies are described that facilitate creating a unified format that can accommodate various MIMO modes. The unified format can employed with a single payload size that includes uplink control information for each available MIMO mode. By packaging the payload with uplink control information related to each MIMO mode, the uplink control information can be utilized with any suitable or available MIMO mode.

摘要翻译： 描述了有助于创建可以适应各种MIMO模式的统一格式的系统和方法。 统一格式可以采用单个有效载荷大小，其包括每个可用MIMO模式的上行链路控制信息。 通过利用与每个MIMO模式相关的上行链路控制信息封装有效载荷，可以利用任何合适的或可用的MIMO模式来利用上行链路控制信息。

公开(公告)号：US20080268834A1

公开(公告)日：2008-10-30

申请号：US11796328

申请日：2007-04-27

申请人： Gerard J. Foschini ,  Taesang Yoo

发明人： Gerard J. Foschini ,  Taesang Yoo

IPC分类号： H04Q7/20

CPC分类号： H04B7/043 ,  H04B7/0452 ,  H04B7/0465 ,  H04W52/346 ,  H04W72/082

摘要： In a system of MIMO communications in a wireless network, a number of wireless units are logically divided into a plurality of user groups, through operation of a semi-orthogonal user selection sub-system. For example, the user selection sub-system may implement a heuristic user selection algorithm based on near-orthogonality. Each user group is assigned a discrete transmission channel, which may be orthogonally defined in terms of frequency, time, or code. Data is transmitted over the channels (e.g., from network base stations) in a coherently coordinated manner, according to a zero-forcing beamforming operation. The system may be configured for operation in a time/frequency selective manner, e.g., over time/frequency selective fading channels. The wireless units may be allocated to the time/frequency slots based on prioritization of channel strength and considerations of fairness, in conjunction with the application of a semi-orthogonal user selection algorithm.

摘要翻译： 在无线网络中的MIMO通信系统中，通过半正交用户选择子系统的操作，将多个无线单元在逻辑上划分成多个用户组。 例如，用户选择子系统可以实现基于近正交性的启发式用户选择算法。 每个用户组被分配离散的传输信道，其可以根据频率，时间或代码来正交地定义。 根据迫零波束成形操作，以相干协调的方式通过信道（例如，来自网络基站）发送数据。 该系统可以被配置为以时间/频率选择性方式操作，例如，随着时间/频率选择性衰落信道。 结合半正交用户选择算法的应用，无线单元可以基于信道强度的优先级和公平性的考虑来分配给时间/频率时隙。