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1. 发明申请

US20110105051A1 DIFFERENTIAL CLOSED-LOOP TRANSMISSION FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中的差分闭环传输反馈
公开(公告)号：US20110105051A1
公开(公告)日：2011-05-05
申请号：US12872085
申请日：2010-08-31
申请人： Timothy A. Thomas , Bishwarup Mondal , Eugene Visotsky , Frederick W. Vook
发明人： Timothy A. Thomas , Bishwarup Mondal , Eugene Visotsky , Frederick W. Vook
IPC分类号： H04B7/005
CPC分类号： H04L27/2601 , H04B7/0617 , H04B7/0623 , H04B7/0641 , H04L25/0242 , H04L25/03006 , H04L25/03343 , H04L2025/03426
摘要： A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. Matrix Ct is also calculated and is based on a previous quantized covariance matrix (Rqt-1), the covariance matrix (R) at time t, and a forgetting factor (γ) that is applied to Rqt-1. The Ct is then used to create a DERC feedback message (signal or waveform) and may be transmitted with pilots on a proper feedback channel to a base unit. The base unit receives the feedback (Ct) as a DERC waveform on a proper feedback channel. The base unit uses non-coherent or coherent detection to detect the DERC values send by the remote unit and uses the DERC values with a previous quantized covariance matrix estimate, a forgetting factor, and a weighting value to compute a covariance matrix estimate to use for beamforming. The base unit then uses the covariance matrix estimate to determine appropriate channel beamforming weights, and instructs transmit beamforming circuitry to use the appropriate weights.
摘要翻译：本文提供了一种用于提供信道反馈的方法和装置。在运行期间，计算时间t（R）处的协方差矩阵作为接收的下行链路信号的函数。还计算矩阵Ct，并且基于先前的量化协方差矩阵（Rqt-1），时间t的协方差矩阵（R）和应用于Rqt-1的遗忘因子（γ）。然后，Ct用于创建DERC反馈消息（信号或波形），并且可以在适当的反馈信道上的导频发送到基本单元。基本单元在适当的反馈通道上接收反馈（Ct）作为DERC波形。基本单元使用非相干或相干检测来检测远程单元发送的DERC值，并且使用具有先前的量化协方差矩阵估计，遗忘因子和加权值的DERC值来计算协方差矩阵估计，以用于波束成形。基本单元然后使用协方差矩阵估计来确定适当的信道波束成形权重，并且指示发送波束成形电路使用适当的权重。

2. 发明授权

US08588324B2 Precoding for coordinated multi-point joint transmission 失效
标题翻译：协调多点联合传输预编码
公开(公告)号：US08588324B2
公开(公告)日：2013-11-19
申请号：US13275470
申请日：2011-10-18
申请人： Bishwarup Mondal , Timothy A. Thomas , Eugene Visotsky
发明人： Bishwarup Mondal , Timothy A. Thomas , Eugene Visotsky
IPC分类号： H04B7/02
CPC分类号： H04B7/024 , H04B7/0469 , H04B7/0478 , H04B7/0658
摘要： The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for implementing precoding for a coordinated multi-point joint transmission in LTE wireless systems using a specific product structure for a multi-point precoding matrix with designed and/or specified usage of multi-point codebooks for generating spatial data stream between a UE having multiple antennas and a plurality of cells.
摘要翻译：本说明书和附图提出了一种新的方法，装置和软件相关产品（例如，计算机可读存储器），用于在LTE无线系统中使用特定的产品结构实现协调的多点联合传输的预编码，用于多点预编码矩阵，用于在具有多个天线的UE和多个小区之间生成空间数据流的多点码本的设计和/或指定用途。

3. 发明授权

US08509705B2 Differential closed-loop transmission feedback in wireless communication systems 有权
标题翻译：无线通信系统中的差分闭环传输反馈
公开(公告)号：US08509705B2
公开(公告)日：2013-08-13
申请号：US12872085
申请日：2010-08-31
申请人： Timothy A. Thomas , Bishwarup Mondal , Eugene Visotsky , Frederick W. Vook
发明人： Timothy A. Thomas , Bishwarup Mondal , Eugene Visotsky , Frederick W. Vook
IPC分类号： H04B1/00
CPC分类号： H04L27/2601 , H04B7/0617 , H04B7/0623 , H04B7/0641 , H04L25/0242 , H04L25/03006 , H04L25/03343 , H04L2025/03426
摘要： A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. Matrix Ct is also calculated and is based on a previous quantized covariance matrix (Rqt-1), the covariance matrix (R) at time t, and a forgetting factor (γ) that is applied to Rqt-1. The Ct is then used to create a DERC feedback message (signal or waveform) and may be transmitted with pilots on a proper feedback channel to a base unit. The base unit receives the feedback (Ct) as a DERC waveform on a proper feedback channel. The base unit uses non-coherent or coherent detection to detect the DERC values send by the remote unit and uses the DERC values with a previous quantized covariance matrix estimate, a forgetting factor, and a weighting value to compute a covariance matrix estimate to use for beamforming. The base unit then uses the covariance matrix estimate to determine appropriate channel beamforming weights, and instructs transmit beamforming circuitry to use the appropriate weights.
摘要翻译：本文提供了一种用于提供信道反馈的方法和装置。在运行期间，计算时间t（R）处的协方差矩阵作为接收的下行链路信号的函数。还计算矩阵Ct，并且基于先前的量化协方差矩阵（Rqt-1），时间t的协方差矩阵（R）和应用于Rqt-1的遗忘因子（γ）。然后，Ct用于创建DERC反馈消息（信号或波形），并且可以在适当的反馈信道上的导频发送到基本单元。基本单元在适当的反馈通道上接收反馈（Ct）作为DERC波形。基本单元使用非相干或相干检测来检测远程单元发送的DERC值，并且使用具有先前的量化协方差矩阵估计，遗忘因子和加权值的DERC值来计算协方差矩阵估计，以用于波束成形。基本单元然后使用协方差矩阵估计来确定适当的信道波束成形权重，并且指示发送波束成形电路使用适当的权重。

4. 发明申请

US20130094604A1 Precoding For Coordinated Multi-Point Joint Transmission 失效
标题翻译：协调多点联合传输预编码
公开(公告)号：US20130094604A1
公开(公告)日：2013-04-18
申请号：US13275470
申请日：2011-10-18
申请人： Bishwarup Mondal , Timothy A. Thomas , Eugene Visotsky
发明人： Bishwarup Mondal , Timothy A. Thomas , Eugene Visotsky
IPC分类号： H04L27/00
CPC分类号： H04B7/024 , H04B7/0469 , H04B7/0478 , H04B7/0658
摘要： The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for implementing precoding for a coordinated multi-point joint transmission in LTE wireless systems using a specific product structure for a multi-point precoding matrix with designed and/or specified usage of multi-point codebooks for generating spatial data stream between a UE having multiple antennas and a plurality of cells.
摘要翻译：本说明书和附图提出了一种新的方法，装置和软件相关产品（例如，计算机可读存储器），用于在LTE无线系统中使用特定的产品结构实现协调的多点联合传输的预编码，用于多点预编码矩阵，用于在具有多个天线的UE和多个小区之间生成空间数据流的多点码本的设计和/或指定用途。

5. 发明授权

US08537790B2 Hierarchical pilot structure in wireless communication systems 有权
标题翻译：无线通信系统中的分层导频结构
公开(公告)号：US08537790B2
公开(公告)日：2013-09-17
申请号：US12367483
申请日：2009-02-06
申请人： Mark C. Cudak , Timothy A. Thomas , Frederick W. Vook , Anup K. Talukdar , Fan Wang , Bishwarup Mondal
发明人： Mark C. Cudak , Timothy A. Thomas , Frederick W. Vook , Anup K. Talukdar , Fan Wang , Bishwarup Mondal
IPC分类号： H04W4/00
CPC分类号： H04L5/0007 , H04L1/06 , H04L5/005 , H04L5/0051 , H04L5/0053 , H04L25/03248
摘要： A method for communicating control channel information in a wireless communication system, including transmitting a super-frame having a time-frequency resource region containing an allocation control channel and multiple pilot elements, at least some of which are associated with the allocation control channel, and indicating, in a configuration information control channel of the super-frame, a characteristic of the pilots elements associated with the allocation control channel.
摘要翻译：一种用于在无线通信系统中传送控制信道信息的方法，包括发送具有包含分配控制信道的时间 - 频率资源区域和多个导频元素的超帧，其中至少一些与分配控制信道相关联，以及在超帧的配置信息控制信道中指示与分配控制信道相关联的导频元素的特性。

6. 发明授权

US07426198B2 Method and apparatus for performing spatial-division multiple access 有权
标题翻译：用于执行空分多址的方法和装置
公开(公告)号：US07426198B2
公开(公告)日：2008-09-16
申请号：US11275938
申请日：2006-02-06
申请人： Bishwarup Mondal , Xiangyang Zhuang , Kevin L. Baum , Timothy A. Thomas , Frederick W. Vook
发明人： Bishwarup Mondal , Xiangyang Zhuang , Kevin L. Baum , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04Q7/00
CPC分类号： H04B7/0617 , H04B7/0452 , H04B7/0634 , H04B7/0639 , Y02D70/444
摘要： A method and apparatus for performing spatial-division multiple access within a communication system is provided herein. During operation, nodes will return null subspace information along with their channel subspace information. The null subspace is similar to the channel subspace except that the null subspace information directs a base station to the matrix in a predefined codebook that results in minimum power being received at the node. The null subspace for each node is taken into consideration when communicating with a particular node.
摘要翻译：本文提供了一种在通信系统内执行空分多址的方法和装置。在运行期间，节点将返回空子空间信息及其信道子空间信息。空子空间类似于信道子空间，除了空子信息将基站指向预定义码本中的矩阵，导致在该节点处接收的最小功率。当与特定节点进行通信时，将考虑每个节点的空子空间。

7. 发明申请

US20110176439A1 CLOSED-LOOP FEEDBACK IN WIRELESS COMMUNICATIONS SYSTEM 有权
标题翻译：无线通信系统中的闭环反馈
公开(公告)号：US20110176439A1
公开(公告)日：2011-07-21
申请号：US12958544
申请日：2010-12-02
申请人： Bishwarup Mondal , Timothy A. Thomas
发明人： Bishwarup Mondal , Timothy A. Thomas
IPC分类号： H04L12/26 , H04W4/00
CPC分类号： H04L25/03343 , H04L5/0007 , H04L25/0204 , H04L25/0391
摘要： A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. In order to reduce overhead, R is normalized and quantized. The base unit then uses the covariance matrix estimate to determine appropriate channel beamforming weights, and instructs transmit beamforming circuitry to use the appropriate weights. In an embodiment, circuitry performs a method of calculating a first precoding matrix index I from a codebook using a received signal, calculating a second codebook index J* using the first precoding matrix index I to approximate a covariance matrix and calculating a quantized coefficient α* to approximate the covariance matrix wherein the quantized coefficient α* is determined using the first precoding matrix index I.
摘要翻译：本文提供了一种用于提供信道反馈的方法和装置。在运行期间，计算时间t（R）处的协方差矩阵作为接收的下行链路信号的函数。为了减少开销，R被归一化和量化。基本单元然后使用协方差矩阵估计来确定适当的信道波束成形权重，并且指示发送波束成形电路使用适当的权重。在一个实施例中，电路执行使用接收信号从码本计算第一预编码矩阵索引I的方法，使用第一预编码矩阵索引I来计算第二码本索引J *以近似协方差矩阵并计算量化系数α* 近似协方差矩阵，其中使用第一预编码矩阵索引I确定量化系数α*

8. 发明授权

US07778343B2 Method and apparatus for finite impulse response cyclic-shift diversity 有权
标题翻译：有限脉冲响应循环移位分集的方法和装置
公开(公告)号：US07778343B2
公开(公告)日：2010-08-17
申请号：US11627563
申请日：2007-01-26
申请人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
发明人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L5/0007 , H04B7/0671
摘要： A generalized form of cyclic shift diversity is described for use in an OFDM system with multiple transmit antennas. Multiple cyclic shifts are performed for each transmit antenna and the shifted signals are scaled and summed to form a time-domain data stream for each transmit antenna. A cyclic extension is added to each data stream prior to transmission.
摘要翻译：描述了在具有多个发射天线的OFDM系统中使用的循环移位分集的通用形式。对于每个发射天线执行多个循环移位，并且移位的信号被缩放和相加以形成每个发射天线的时域数据流。在传输之前，将循环扩展添加到每个数据流。

9. 发明申请

US20080305805A1 METHOD AND APPARATUS FOR PERFORMING SPATIAL-DIVISION MULTIPLE ACCESS 有权
标题翻译：用于执行空间分割多路访问的方法和装置
公开(公告)号：US20080305805A1
公开(公告)日：2008-12-11
申请号：US12192164
申请日：2008-08-15
申请人： Bishwarup Mondal , Xiangyang Zhuang , Kevin L. Baum, , Timothy A. Thomas , Frederick W. Vook
发明人： Bishwarup Mondal , Xiangyang Zhuang , Kevin L. Baum, , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04Q7/20 , H04M1/00
CPC分类号： H04B7/0617 , H04B7/0452 , H04B7/0634 , H04B7/0639 , Y02D70/444
摘要： A method and apparatus for performing spatial-division multiple access within a communication system is provided herein. During operation, nodes will return null subspace information along with their channel subspace information. The null subspace is similar to the channel subspace except that the null subspace information directs a base station to the matrix in a predefined codebook that results in minimum power being received at the node. The null subspace for each node is taken into consideration when communicating with a particular node.
摘要翻译：本文提供了一种在通信系统内执行空分多址的方法和装置。在运行期间，节点将返回空子空间信息及其信道子空间信息。空子空间类似于信道子空间，除了空子信息将基站指向预定义码本中的矩阵，导致在该节点处接收的最小功率。当与特定节点进行通信时，将考虑每个节点的空子空间。

10. 发明申请

US20080285667A1 METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 失效
标题翻译：封闭环路发射反馈的方法与装置
公开(公告)号：US20080285667A1
公开(公告)日：2008-11-20
申请号：US12060301
申请日：2008-04-01
申请人： Bishwarup Mondal , Robert M. Harrison , Timothy A. Thomas
发明人： Bishwarup Mondal , Robert M. Harrison , Timothy A. Thomas
IPC分类号： H04L27/28
CPC分类号： H04B7/0417 , H04B7/0465 , H04B7/063 , H04B7/0634 , H04B7/0639 , H04B7/066
摘要： A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step 900 of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step 902 includes measuring a composite channel between the transmitter and receiver. A next step 904 includes determining at least one performance metric for each set of weightings in the codebook. A next step 906 includes selecting preferred weightings for each data stream in response to the performance metrics. A next step 908 includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.
摘要翻译：描述了一种用于提供用于具有多个发射和接收天线的闭环发射的反馈的装置的方法。该方法包括第一步骤900，其提供包含多个发射天线的每个数据流的权重集的码本，每个集合由发射机和接收机已知的索引识别。相同的码本被用于直到发射天线数量的任何数量的数据流。下一步骤902包括测量发射机和接收机之间的复合信道。下一步骤904包括确定码本中每一组加权的至少一个性能度量。下一步骤906包括响应于性能度量为每个数据流选择优选权重。接下来的步骤908包括将优先权重的索引反馈到发射机以用于随后的传输。

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