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公开(公告)号：US20110211628A1
公开(公告)日：2011-09-01
申请号：US13124817
申请日：2008-10-31
CPC分类号： H04B7/0417 , H04B7/0619
摘要： As a basis for precoder quantization, a channel matrix representing multi-antenna channel characteristics between a transmitter and a receiver in the mobile communications network is estimated (S1). A channel-assisted vector selection procedure (S2-S4) for iteratively selecting precoding vectors for a precoding matrix is performed. Each of a number of iterations of the novel iterative vector selection procedure generally involves evaluation (S2) of the performance of each one of a set of candidate vectors included in a given vector codebook with respect to a predetermined performance measure that is dependent on the estimated channel matrix, and selection (S3) of one of the set of candidate vectors as a respective precoding vector for the precoding matrix based on the evaluated performance. Information representative of a set of selected precoding vectors is then compiled (S5) to form a quantized representation of the precoding matrix for transmission to the transmitter side.
摘要翻译： 作为预编码器量化的基础，估计表示移动通信网络中的发射机与接收机之间的多天线信道特性的信道矩阵（S1）。 执行用于迭代地选择预编码矩阵的预编码向量的信道辅助向量选择过程（S2-S4）。 新颖迭代向量选择过程的多次迭代中的每一个通常涉及关于给定向量码本中包括的一组候选向量中的每一个的执行的评估（S2），该预定性能度量取决于估计的 信道矩阵和候选向量集合中的一个的选择（S3）作为用于基于所评估的性能的预编码矩阵的相应预编码向量。 然后，编译一组选定的预编码矢量的信息（S5），以形成用于发射到发射机侧的预编码矩阵的量化表示。
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公开(公告)号：US08619904B2
公开(公告)日：2013-12-31
申请号：US13124817
申请日：2008-10-31
IPC分类号： H04K1/02
CPC分类号： H04B7/0417 , H04B7/0619
摘要： As a basis for precoder quantization, a channel matrix representing multi-antenna channel characteristics between a transmitter and a receiver in the mobile communications network is estimated (S1). A channel-assisted vector selection procedure (S2-S4) for iteratively selecting precoding vectors for a precoding matrix is performed. Each of a number of iterations of the novel iterative vector selection procedure generally involves evaluation (S2) of the performance of each one of a set of candidate vectors included in a given vector codebook with respect to a predetermined performance measure that is dependent on the estimated channel matrix, and selection (S3) of one of the set of candidate vectors as a respective precoding vector for the precoding matrix based on the evaluated performance. Information representative of a set of selected precoding vectors is then compiled (S5) to form a quantized representation of the precoding matrix for transmission to the transmitter side.
摘要翻译： 作为预编码器量化的基础，估计表示移动通信网络中的发射机与接收机之间的多天线信道特性的信道矩阵（S1）。 执行用于迭代地选择预编码矩阵的预编码向量的信道辅助向量选择过程（S2-S4）。 新颖迭代向量选择过程的多次迭代中的每一个通常涉及关于给定向量码本中包括的一组候选向量中的每一个的执行的评估（S2），该预定性能度量取决于估计的 信道矩阵和候选向量集合中的一个的选择（S3）作为用于基于所评估的性能的预编码矩阵的相应预编码向量。 然后，编译一组选定的预编码矢量的信息（S5），以形成用于发射到发射机侧的预编码矩阵的量化表示。
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公开(公告)号：US20150117392A1
公开(公告)日：2015-04-30
申请号：US14398873
申请日：2012-05-16
CPC分类号： H04W72/082 , H04B7/024 , H04B17/345 , H04B17/382 , H04J11/0053 , H04L1/00 , H04L1/0026 , H04L1/0077 , H04L1/20 , H04L5/0048 , H04W24/10
摘要： The invention relates to methods and arrangements in a transmitting node for enabling a receiving node to perform measurements on interference caused by transmissions from at least one transmission point controlled by the transmitting node on receptions at the receiving node. The transmitting and receiving nodes are comprised in a wireless communications system. The transmitting node determines an interference measurement resource, IMR, for the receiving node. The receiving node is expected to measure interference on the IMR. The transmitting node then transmits at least one interfering signal on the IMR. The at least one interfering signal is not expected to be decoded or coherently measured upon by any node served by the transmitting node.
摘要翻译： 本发明涉及一种发送节点中的方法和装置，用于使接收节点能够对由接收节点的接收上的由发送节点控制的至少一个发送点的传输引起的干扰执行测量。 发送和接收节点包括在无线通信系统中。 发射节点确定接收节点的干扰测量资源IMR。 接收节点有望测量IMR上的干扰。 发射节点然后在IMR上发送至少一个干扰信号。 不期望至少一个干扰信号被由发射节点服务的任何节点解码或相干测量。
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公开(公告)号：US20130064122A1
公开(公告)日：2013-03-14
申请号：US13660158
申请日：2012-10-25
IPC分类号： H04W24/00
CPC分类号： H04W24/02 , H04L1/0026 , H04L1/0034 , H04L1/1607 , H04L5/0023 , H04W72/0406 , H04W72/082 , H04W72/085 , H04W88/08
摘要： Method and apparatus for enabling accurate link quality estimation of a wireless link between a sending node and a receiving node. When the sending node receives link state reports from the receiving node, it estimates the current state of the wireless link. The sending node also determines a measurement adjusting parameter if the link state reports are deemed inaccurate in relation to the estimated link state, based on a deviation between the received link state reports and the estimated actual link state. The sending node then sends the determined measurement adjusting parameter to the receiving node, and the receiving node provides a link state report based on signal measurements adjusted by the measurement adjusting parameter. The adjusted link state report can then be used for link adaptation of the wireless link and/or for packet scheduling decisions.
摘要翻译： 用于实现发送节点和接收节点之间的无线链路的精确链路质量估计的方法和装置。 当发送节点从接收节点接收到链路状态报告时，它估计无线链路的当前状态。 如果链路状态报告相对于估计的链路状态被认为不准确，则发送节点还基于接收的链路状态报告与估计的实际链路状态之间的偏差来确定测量调整参数。 然后，发送节点将确定的测量调整参数发送给接收节点，并且接收节点基于由测量调整参数调整的信号测量值来提供链路状态报告。 调整后的链路状态报告然后可用于无线链路的链路自适应和/或用于分组调度决定。
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5.发明申请SYSTEM AND METHOD FOR ALLOCATING TRANSMISSION RESOURCES BASED ON A TRANSMISSION RANK 有权基于传输等级分配传输资源的系统和方法公开(公告)号：US20110268063A1
公开(公告)日：2011-11-03
申请号：US13099101
申请日：2011-05-02
申请人： David Hammarwall , George Jöngren , Bo Göransson
发明人： David Hammarwall , George Jöngren , Bo Göransson
IPC分类号： H04W72/06
CPC分类号： H04W72/0413 , H04L1/003 , H04L1/0079 , H04L1/0618 , H04L1/1664 , H04L1/1671 , H04L5/0016 , H04L5/0026 , H04L5/0044 , H04L5/0046 , H04L5/0053 , H04L25/03929 , H04W72/02 , H04W72/0446
摘要： A method for wirelessly transmitting data using a plurality of transmission layers includes estimating a number of data vector symbols to be allocated to one or more user data codewords during the subframe and determining a number of bits in the one or more user data codewords. The method also includes calculating a nominal number of control vector symbols to allocate to control information based, at least in part, on the estimated number of data vector symbols and the determined number of bits in the one or more user data codewords. Additionally, the method includes determining an offset value based, at least in part, on a number of layers over which the wireless terminal will be transmitting during the subframe and calculating a final number of control vector symbols by multiplying the nominal number of control vector symbols and the offset value. The method also includes mapping one or more control codewords to the final number of control vector symbols and transmitting vector symbols carrying the one or more user data codewords and the one or more control codewords over the plurality of transmission layers during the subframe.
摘要翻译： 使用多个传输层无线传输数据的方法包括估计在子帧期间分配给一个或多个用户数据码字的数据向量符号的数量，并确定一个或多个用户数据码字中的位数。 该方法还包括至少部分地基于所估计的数据向量符号数和所确定的一个或多个用户数据码字中的位数来计算控制向量符号的标称数量以分配给控制信息。 另外，该方法包括至少部分地基于无线终端将在子帧期间将要发射的层数来确定偏移值，并通过将控制向量符号的标称数量乘以来计算最终数量的控制向量符号 和偏移值。 该方法还包括将一个或多个控制码字映射到最终数量的控制向量符号，以及在子帧期间在多个传输层上传送承载一个或多个用户数据码字和一个或多个控制码字的矢量符号。
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公开(公告)号：US09736828B2
公开(公告)日：2017-08-15
申请号：US14413870
申请日：2012-07-17
CPC分类号： H04W72/042 , H04L5/0057 , H04W72/048 , H04W72/1205 , H04W76/27
摘要： A network node, a UE and respective methods therein are provided for enabling transmission of data using a resource element reserved for CRS. The method in the network node for scheduling a downlink data transmission to the UE currently connected to the network node, comprises determining to schedule data transmission to the UE using at least one resource element reserved for transmitting CRSs during at least one subframe; and transmitting data to the UE using the at least one resource element reserved for transmitting the at least one CRS during the at least one subframe.
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7.发明申请公开(公告)号：US20140112173A1
公开(公告)日：2014-04-24
申请号：US13877799
申请日：2013-03-13
申请人： David Hammarwall , Svante Bergman , George Jöngren
发明人： David Hammarwall , Svante Bergman , George Jöngren
CPC分类号： H04W24/10 , H04B17/345 , H04L1/0026 , H04L5/0032 , H04L5/0035 , H04L5/0048 , H04L5/0091
摘要： A system and method for providing an eNodeB with the flexibility to configure a Channel State Information (CSI) report to match a specific Coordinated Multipoint (CoMP) transmission hypothesis, which is a candidate for a downlink transmission to a User Equipment (UE) is disclosed. A UE receives, from the eNodeB, a configuration message that specifies a CSI report. The CSI report is specified by a particular interference hypothesis and a particular desired signal hypothesis corresponding to data transmission over at least one effective channel characterized by a specific reference signal. The UE estimates interference according to the interference hypothesis, and/or estimates at least one effective channel by performing measurements on the specific reference signal, and determines a CSI report based on the interference estimation and on the estimated effective channel. The UE also transmits the CSI report to the eNodeB.
摘要翻译： 公开了一种用于向eNodeB提供配置信道状态信息（CSI）报告以匹配作为向用户设备（UE）的下行链路传输的候选者的特定协调多点（CoMP）传输假设）的系统和方法， 。 UE从eNodeB接收指定CSI报告的配置消息。 CSI报告由特定干扰假设和对应于通过特定参考信号表征的至少一个有效信道上的数据传输的特定期望信号假设来指定。 UE根据干扰假设估计干扰，和/或通过对特定参考信号执行测量来估计至少一个有效信道，并且基于干扰估计和估计的有效信道来确定CSI报告。 UE还向eNodeB发送CSI报告。
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公开(公告)号：US08605809B2
公开(公告)日：2013-12-10
申请号：US12951270
申请日：2010-11-22
申请人： George Jöngren , David Hammarwall
发明人： George Jöngren , David Hammarwall
IPC分类号： H04B7/02
CPC分类号： H04B7/0456 , H04B7/0617 , H04B7/0639 , H04B7/0656 , H04B7/0663 , H04L25/03343 , H04L25/49 , H04L2025/03426 , H04L2025/03808
摘要： According to one or more aspects, the teachings herein improve user equipment (UE) Channel State Information (CSI) feedback, by letting the precoder part of a CSI feedback report comprise factorized precoder feedback. In one or more such embodiments, the factorized precoder feedback corresponds to at least two precoder matrices, including a recommended “conversion” precoder matrix and a recommended “tuning” precoder matrix. The recommended conversion precoder matrix restricts the number of channel dimensions considered by the recommended tuning precoder matrix and, in turn, the recommended tuning precoder matrix matches the recommended precoder matrix to an effective channel that is defined in part by said recommended conversion precoder matrix.
摘要翻译： 根据一个或多个方面，本文的教导通过使CSI反馈报告的预编码器部分包含分解预编码器反馈来改善用户设备（UE）信道状态信息（CSI）反馈。 在一个或多个这样的实施例中，分解预编码器反馈对应于至少两个预编码器矩阵，包括推荐的“转换”预编码器矩阵和推荐的“调谐”预编码器矩阵。 推荐的转换预编码器矩阵限制了推荐的调谐预编码器矩阵考虑的通道尺寸数量，反过来，推荐的调谐预编码器矩阵将推荐的预编码器矩阵与由所述推荐的转换预编码器矩阵部分定义的有效通道相匹配。
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公开(公告)号：US08582627B2
公开(公告)日：2013-11-12
申请号：US13080737
申请日：2011-04-06
申请人： David Hammarwall , George Jöngren
发明人： David Hammarwall , George Jöngren
IPC分类号： H04B1/38
CPC分类号： H04B7/0456 , H04B7/0465 , H04B7/0469 , H04B7/0478 , H04B7/0634 , H04B7/0639 , H04B7/0647 , H04B7/065 , H04B7/10 , H04L5/0044 , H04W72/0413
摘要： The teachings herein present a method and apparatus that implement and use a factorized precoder structure that is advantageous in terms of performance and efficiency. In particular, the teachings presented herein disclose an underlying precoder structure that allows for certain codebook reuse across different transmission scenarios, including for transmission from a single Uniform Linear Array (ULA) of transmit antennas and transmission from cross-polarized subgroups of such antennas. According to this structure, an overall precoder is constructed from a conversion precoder and a tuning precoder. The conversion precoder includes antenna-subgroup precoders of size NT/2, where NT represents the number of overall antenna ports considered. Correspondingly, the tuning precoder controls the offset of beam phases between the antenna-subgroup precoders, allowing the conversion precoder to be used with cross-polarized arrays of NT/2 antenna elements and with co-polarized arrays of NT antenna elements.
摘要翻译： 本文的教导提出了实现和使用在性能和效率方面有利的因式分解预编码器结构的方法和装置。 特别地，本文所呈现的教导公开了一种潜在的预编码器结构，其允许在不同传输场景下的某些码本重用，包括用于从发射天线的单个均匀线性阵列（ULA）和从这些天线的交叉极化子组发射的传输。 根据该结构，由转换预编码器和调谐预编码器构成整体预编码器。 转换预编码器包括大小为NT / 2的天线 - 子组预编码器，其中NT表示所考虑的总体天线端口的数量。 相应地，调谐预编码器控制天线 - 子组预编码器之间的波束相位的偏移，允许转换预编码器与NT / 2天线元件的交叉极化阵列和NT天线元件的共极化阵列一起使用。
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公开(公告)号：US20130242949A1
公开(公告)日：2013-09-19
申请号：US13874768
申请日：2013-05-01
申请人： Yang Hu , David Astely , David Hammarwall , George Jöngren , Xinghua Song , Jianfeng Wang
发明人： Yang Hu , David Astely , David Hammarwall , George Jöngren , Xinghua Song , Jianfeng Wang
IPC分类号： H04W72/06
CPC分类号： H04W28/0263 , H04J11/00 , H04L5/0026 , H04L5/0048 , H04W72/042 , H04W72/0453 , H04W72/06
摘要： The present invention provides a unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank.
摘要翻译： 本发明提供天线端口和组/码对之间的统一的等级独立映射。 每个天线端口与一个码分多路复用（CDM）组和一个正交覆盖码（OCC）唯一相关。 选择天线端口和组/码对之间的映射，使得对于给定的天线端口，CDM组和OCC对于每个传输等级将是相同的。
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