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。

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。

公开(公告)号：US20110268058A1

公开(公告)日：2011-11-03

申请号：US13095313

申请日：2011-04-27

申请人： David Hammarwall ,  George Jöngren

发明人： David Hammarwall ,  George Jöngren

IPC分类号： H04W72/04

CPC分类号： H04W72/0446 ,  H04L1/003 ,  H04L1/0079 ,  H04L1/1664 ,  H04L1/1671 ,  H04L5/0016 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0092 ,  H04W72/0466

摘要： A method for wirelessly transmitting data using a plurality of transmission layers includes estimating a number of vector symbols to be allocated to transmission of user data codewords during a subframe and determining a number of bits in a plurality of user data codewords to be transmitted during the subframe. The method also includes calculating a number of control vector symbols to allocate to control information based at least in part on the estimated number of vector symbols and the determined number of bits. Additionally, the method includes mapping control codewords to the calculated number of control vector symbols and transmitting vector symbols carrying the user data codewords and the control codewords over the plurality of transmission layers during the subframe.

摘要翻译： 一种用于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用户数据码字的传输的向量符号的数量，并且确定在子帧期间要发送的多个用户数据码字中的比特数 。 该方法还包括至少部分地基于所估计的向量符号数和所确定的比特数来计算多个控制向量符号以分配给控制信息。 此外，该方法包括在子帧期间将控制码字映射到所计算的控制向量符号的数量，以及在多个传输层上传送携带用户数据码字和控制码字的向量符号。

公开(公告)号：US20110249712A1

公开(公告)日：2011-10-13

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： H04L5/14

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。

公开(公告)号：US08537924B2

公开(公告)日：2013-09-17

申请号：US12812159

申请日：2008-05-07

申请人： George Jöngren ,  David Hammarwall ,  Patrick Svedman

发明人： George Jöngren ,  David Hammarwall ,  Patrick Svedman

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04B7/0639 ,  H04B7/10 ,  H04L2025/03426

摘要： Data is transmitted over multiple input multiple output (MIMO) channels. Plural bit streams are modulated into multiple data symbol vectors. Each vector has a transmission rank with one vector for each MIMO channel. Transmission rank is the number of elements in a data symbol vector corresponding to the number of data streams being transmitted in parallel over each MIMO channel. The multiple data symbol vectors are preceded into multiple precoded symbol vectors using a plurality of precoder cycling sets, one set for each transmission rank including multiple different precoders. The precoders in each precoder cycling set are well-separated with respect to a plurality of distance measures. The precoding includes precoding each data symbol vector of a transmission rank with a precoder belonging to the precoder cycling set of that transmission rank. The precoded symbol vectors are then transmitted over the MIMO channels.

摘要翻译： 数据通过多输入多输出（MIMO）信道传输。 多个比特流被调制成多个数据符号向量。 每个矢量具有每个MIMO信道具有一个向量的传输秩。 传输等级是对应于在每个MIMO信道上并行发送的数据流的数量的数据符号向量中的元素的数量。 多个数据符号向量在多个预编码符号向量之前，使用多个预编码器循环组，每个包含多个不同的预编码器的每个传输等级集合。 每个预编码器循环组中的预编码器相对于多个距离测量被很好地分离。 预编码包括用属于该传输等级的预编码器循环组的预编码器来预编码传输秩的每个数据符号向量。 然后通过MIMO信道发送预编码的符号向量。

公开(公告)号：US08472547B2

公开(公告)日：2013-06-25

申请号：US13080740

申请日：2011-04-06

申请人： David Hammarwall ,  George Jöngren

发明人： David Hammarwall ,  George Jöngren

IPC分类号： H04B7/02 ,  H04L1/02

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： One aspect of the teachings herein relates to signaling codebook restrictions, to restrict the precoder recommendations being fed back from a remote transceiver, so that precoder selections made by the remote receiver are restricted to permitted subsets of overall precoders within a defined set of overall precoders, or to permitted subsets within larger sets of conversion precoders and tuning precoders, for the case where the overall precoders are represented in factorized form by conversion and tuning precoders. As a non-limiting example, these teachings advantageously provide for precoder restrictions in LTE or LTE-Advanced networks, where ongoing development targets the use of larger, richer sets of precoders, and where the disclosed mechanisms for determining, signaling, and responding to subset restrictions provide significant operational advantages.

摘要翻译： 本文的教导的一个方面涉及信令码本限制，以限制从远程收发器反馈的预编码器建议，使得由远程接收机进行的预编码器选择被限制在所定义的整个预编码器集合内的整体预编码器的允许子集， 或者在通过转换和调谐预编码器以分解形式表示整体预编码器的情况下，在更大的转换预编码器和调谐预编码器集合内允许的子集。 作为非限制性示例，这些教导有利地提供LTE或LTE-Advanced网络中的预编码器限制，其中正在进行的开发旨在使用更大，更丰富的预编码器集合，并且其中所公开的用于确定，发信号和响应子集的机制 限制提供了显着的操作优势。

公开(公告)号：US08446886B2

公开(公告)日：2013-05-21

申请号：US12900628

申请日：2010-10-08

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： H04W72/04

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。

公开(公告)号：US08391395B2

公开(公告)日：2013-03-05

申请号：US12960964

申请日：2010-12-06

申请人： David Hammarwall ,  George Jöngren

发明人： David Hammarwall ,  George Jöngren

IPC分类号： H04B7/02

CPC分类号： H04B7/0626 ,  H04B7/0417 ,  H04B7/065

摘要： A precoder for an effective channel linking a wireless receiver to a wireless transmitter includes a precoder report and a precoder update report, the effective channel including a propagation channel, transmit filters and receive filters. A structured frequency-selectivity of the effective channel is determined, the structured frequency-selectivity being induced by one or more long term and/or persistent parameters of the effective channel. The precoder update report is generated based on the structured frequency-selectivity. The precoder update report includes frequency-dependent phase compensation which accounts for the structured frequency-selectivity. The precoder report is generated for the effective channel based on channel state information determined for the effective channel. The precoder report and the precoder update report are transmitted to the wireless transmitter. The transmitter determines a transmission operation based on the precoder report and the precoder update report, and transmits data to the wireless receiver in accordance with the transmission operation.

摘要翻译： 将无线接收机与无线发射机连接的有效信道的预编码器包括预编码器报告和预编码器更新报告，有效信道包括传播信道，发射滤波器和接收滤波器。 确定有效信道的结构化频率选择性，结构化频率选择性由有效信道的一个或多个长期和/或持久参数引起。 基于结构化频率选择性生成预编码器更新报告。 预编码器更新报告包括考虑结构化频率选择性的频率相位相位补偿。 基于为有效信道确定的信道状态信息，为有效信道生成预编码器报告。 预编码器报告和预编码器更新报告被发送到无线发射机。 发射机根据预编码器报告和预编码器更新报告确定传输操作，并根据传输操作向无线接收机发送数据。

公开(公告)号：US20120275414A1

公开(公告)日：2012-11-01

申请号：US13520803

申请日：2010-06-24

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： H04W72/04

CPC分类号： H04B7/0452 ,  H04B7/0689 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048

摘要： Systems and methods for generating a demodulation reference signal for use by user equipment configured with multiple antennas based on a rank of an antenna or an antenna port are disclosed. A rank for a user equipment device is determined indicating the number of spatial layers or antenna ports in use, and the value of the rank is used to generate a cyclic shift offset and a cyclic shift, that can then be used to generate a demodulation reference signal to be used in timeslots within each spatial layer of an uplink transmission. Orthogonal cover codes may be used in conjunction with a determined cyclic shift to generate a demodulation reference signal.

摘要翻译： 公开了一种用于生成基于天线或天线端口的等级配置有多个天线的用户设备使用的解调参考信号的系统和方法。 确定用户设备设备的等级，指示正在使用的空间层或天线端口的数量，并且使用该等级的值来产生循环移位偏移和循环移位，然后可以用于产生解调参考 信号用于上行链路传输的每个空间层内的时隙。 正交覆盖码可以与确定的循环移位结合使用，以产生解调参考信号。

公开(公告)号：US20110211628A1

公开(公告)日：2011-09-01

申请号：US13124817

申请日：2008-10-31

申请人： David Hammarwall ,  George Jöngren ,  Stefano Sorrention

发明人： David Hammarwall ,  George Jöngren ,  Stefano Sorrention

IPC分类号： H04W24/00 ,  H04B7/02

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。