公开(公告)号：US08559343B2

公开(公告)日：2013-10-15

申请号：US12816821

申请日：2010-06-16

申请人： Stefan Parkvall ,  David Astely ,  Erik Dahlman ,  Johan Nyström ,  Muhammad Imadur Rahman ,  Yngve Selén ,  Johan Sköld

发明人： Stefan Parkvall ,  David Astely ,  Erik Dahlman ,  Johan Nyström ,  Muhammad Imadur Rahman ,  Yngve Selén ,  Johan Sköld

IPC分类号： H04J3/00 ,  H04W4/00

CPC分类号： H04W72/0446 ,  H04B7/2643 ,  H04B7/2656 ,  H04L5/14 ,  H04W72/0406

摘要： The technology disclosed provides the ability for a subframe to be configured as a “flexible” subframe. As a result, at least three different types of subframes in a TDD system may be configured: a downlink (“DL”) subframe, an uplink (“UL”) subframe, and a “flexible” subframe. While the DL and UL subframes are preconfigured for each frame instance, the flexible subframes are dynamically allocated to be an uplink subframe in one instance of a frame and a downlink subframe in another instance of the frame.

摘要翻译： 所公开的技术提供了将子帧配置为“灵活”子帧的能力。 结果，可以配置TDD系统中的至少三种不同类型的子帧：下行链路（“DL”）子帧，上行链路（“UL”）子帧和“灵活”子帧。 虽然对于每个帧实例预先配置了DL和UL子帧，但是在帧的另一个实例中，灵活子帧被动态地分配为帧的一个实例中的上行链路子帧和下行链路子帧。

公开(公告)号：US09685702B2

公开(公告)日：2017-06-20

申请号：US13991990

申请日：2010-12-17

申请人： Yang Hu ,  David Astely ,  Zhiheng Guo ,  Muhammad Imadur Rahman ,  Hai Wang ,  Ruiqi Zhang

发明人： Yang Hu ,  David Astely ,  Zhiheng Guo ,  Muhammad Imadur Rahman ,  Hai Wang ,  Ruiqi Zhang

IPC分类号： H01Q3/00 ,  G01S3/16 ,  H01Q3/40 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/10 ,  H04B7/04

CPC分类号： H01Q3/40 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0671 ,  H04B7/0686 ,  H04B7/0691 ,  H04B7/10

摘要： The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof. With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.

公开(公告)号：US08737507B2

公开(公告)日：2014-05-27

申请号：US13127176

申请日：2009-05-14

申请人： David Astely ,  George Jöngren ,  Muhammad Imadur Rahman

发明人： David Astely ,  George Jöngren ,  Muhammad Imadur Rahman

IPC分类号： H04B7/02

CPC分类号： H04B7/0639 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0691 ,  H04L5/0023 ,  H04L5/005 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Determining transmitter antenna weights at a base station having more available transmit antennas than the available number of reference signals can be performed by transmitting reference signals and receiving channel feedback data derived by a mobile terminal from the reference signals. The reference signals are each assigned to one of two or more antenna groupings, wherein at least a first one of the antenna groupings includes two or more transmit antennas, and transmitted using at least one transmit antenna from the corresponding antenna grouping. A first beam-forming vector for the first one of the antenna grouping is determined, and mapping the one or more data streams to the transmit antennas according to a final precoding matrix that depends on the channel feedback data and the first beam-forming vector is performed, to obtain a weighted transmit signal for each of the antennas.

摘要翻译： 可以通过从参考信号发送参考信号和接收由移动终端导出的信道反馈数据来确定具有比可用参考信号数更多的可用发射天线的基站的发射机天线权重。 每个参考信号被分配给两个或多个天线分组中的一个，其中天线分组中的至少第一天线分组包括两个或更多个发射天线，并且使用来自相应天线分组的至少一个发射天线发射。 确定天线分组中的第一个的第一波束形成向量，并且根据取决于信道反馈数据和第一波束形成向量的最终预编码矩阵将一个或多个数据流映射到发射天线 以获得每个天线的加权发射信号。

公开(公告)号：US08989062B2

公开(公告)日：2015-03-24

申请号：US13643228

申请日：2010-05-04

申请人： Muhammad Imadur Rahman ,  David Astely ,  Fan Sun

发明人： Muhammad Imadur Rahman ,  David Astely ,  Fan Sun

IPC分类号： H04J3/00 ,  H04L12/26 ,  H04W4/00 ,  H04L27/00 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0417 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0665

摘要： Method and arrangement in a base station for sending data to a user equipment. The base station comprises an instance of a codebook, corresponding to another instance of the codebook comprised in the user equipment. The method comprises obtaining channel state information from a signal received from the user equipment, estimating a channel to be used for transmitting data to the user equipment, calculating a precoder, based on the obtained channel state information. Further is comprised the steps of selecting a precoding index from the codebook based on the calculated precoder, or selecting a precoding index received from the user equipment, precoding data to be transmitted to the user equipment using the calculated precoder and transmitting the precoded data, a non-user dedicated reference signal and the precoding index on the estimated channel to the user equipment. Further, corresponding method and arrangement in a user equipment are described.

摘要翻译： 用于向用户设备发送数据的基站中的方法和装置。 基站包括对应于用户设备中包含的码本的另一实例的码本的实例。 该方法包括从用户设备接收到的信号中获取信道状态信息，根据所获得的信道状态信息估计用于向用户设备发送数据的信道，计算预编码器。 还包括以下步骤：基于所计算的预编码器从码本中选择预编码索引，或者选择从用户设备接收的预编码索引，使用所计算的预编码器对要发送给用户设备的数据进行预编码，并发送预编码数据; 非用户专用参考信号和估计信道上的用户设备的预编码索引。 此外，描述了用户设备中的相应方法和布置。

公开(公告)号：US20130257655A1

公开(公告)日：2013-10-03

申请号：US13991990

申请日：2010-12-17

申请人： Yang Hu ,  David Astely ,  Zhiheng Guo ,  Muhammad Imadur Rahman ,  Hai Wang ,  Ruiqi Zhang

发明人： Yang Hu ,  David Astely ,  Zhiheng Guo ,  Muhammad Imadur Rahman ,  Hai Wang ,  Ruiqi Zhang

IPC分类号： H01Q3/40

CPC分类号： H01Q3/40 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0671 ,  H04B7/0686 ,  H04B7/0691 ,  H04B7/10

摘要： The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof. With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.

摘要翻译： 本发明公开了一种用于由多个天线元件组成的极化天线阵列的波束成形方法，其应用于单层波束成形或双层波束成形，其包括以下步骤：确定（201）每个极化内的天线元件之间的相位补偿的第一波束成形加权 方向; 确定（202）第二波束形成权重用于两个偏振方向的等效信道之间的相位补偿; 以及计算（203）混合波束形成权重作为所述第一波束成形权重和所述第二波束成形权重的乘积。 在本发明中还提供了一种用于极化天线阵列的波束成形装置以及无线电通信装置及其系统。 利用本发明，对于交叉极化天线阵列确定单层和双层波束成形权重，而不需要全渠道知识或PMI的帮助。 计算复杂度降低，可实现全功率放大器利用。

公开(公告)号：US20130039235A1

公开(公告)日：2013-02-14

申请号：US13643228

申请日：2010-05-04

申请人： Muhammad Imadur Rahman ,  David Astely ,  Fan Sun

发明人： Muhammad Imadur Rahman ,  David Astely ,  Fan Sun

IPC分类号： H04B7/04 ,  H04W4/00

CPC分类号： H04B7/0417 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0665

摘要： Method and arrangement in a base station for sending data to a user equipment. The base station comprises an instance of a codebook, corresponding to another instance of the codebook comprised in the user equipment. The method comprises obtaining channel state information from a signal received from the user equipment, estimating a channel to be used for transmitting data to the user equipment, calculating a precoder, based on the obtained channel state information. Further is comprised the steps of selecting a precoding index from the codebook based on the calculated precoder, or selecting a precoding index received from the user equipment, precoding data to be transmitted to the user equipment using the calculated precoder and transmitting the precoded data, a non-user dedicated reference signal and the precoding index on the estimated channel to the user equipment. Further, corresponding method and arrangement in a user equipment are described.

摘要翻译： 用于向用户设备发送数据的基站中的方法和装置。 基站包括对应于用户设备中包含的码本的另一实例的码本的实例。 该方法包括从用户设备接收到的信号中获取信道状态信息，根据所获得的信道状态信息估计用于向用户设备发送数据的信道，计算预编码器。 还包括以下步骤：基于所计算的预编码器从码本中选择预编码索引，或者选择从用户设备接收的预编码索引，使用所计算的预编码器对要发送给用户设备的数据进行预编码，并发送预编码数据; 非用户专用参考信号和估计信道上的用户设备的预编码索引。 此外，描述了用户设备中的相应方法和布置。

公开(公告)号：US20110205930A1

公开(公告)日：2011-08-25

申请号：US13127176

申请日：2009-05-14

申请人： Muhammad Imadur Rahman ,  George Jöngren ,  David Astely

发明人： Muhammad Imadur Rahman ,  George Jöngren ,  David Astely

IPC分类号： H04W4/00 ,  H04W24/08

CPC分类号： H04B7/0639 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0691 ,  H04L5/0023 ,  H04L5/005 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Techniques are disclosed for determining transmitter antenna weights at a base station (12) having more available transmit antennas (150) than the available number of reference signals. An exemplary method includes transmitting (530) a plurality of reference signals and receiving (540) channel feedback data derived by a mobile terminal (14) from the reference signals. The reference signals are each assigned to a corresponding one of two or more antenna groupings, wherein at least a first one of the antenna groupings comprises two or more transmit antennas (150), and transmitted using at least one transmit antenna (150) from the corresponding antenna grouping. The method further includes determining (550) a first beam-forming vector for the first one of the antenna grouping and mapping (570) the one or more data streams to the transmit antennas (150) according to a final precoding matrix that depends on the channel feedback data and the first beam-forming vector, to obtain a weighted transmit signal for each of the antennas (150).

摘要翻译： 公开了用于在具有比可用数量的参考信号更多的可用发射天线（150）的基站（12）处确定发射机天线权重的技术。 一种示例性方法包括：发射（530）多个参考信号，并且从参考信号接收（540）由移动终端（14）导出的信道反馈数据。 每个参考信号被分配给两个或多个天线分组中的相应一个，其中天线分组中的至少第一天线分组包括两个或多个发射天线（150），并且使用至少一个发射天线（150）从 相应的天线分组。 该方法还包括确定（550）天线组合中第一个的第一波束形成向量，并根据最终预编码矩阵将该一个或多个数据流映射（570）到发射天线（150） 信道反馈数据和第一波束成形矢量，以获得每个天线（150）的加权发射信号。

公开(公告)号：US20130115964A1

公开(公告)日：2013-05-09

申请号：US13702293

申请日：2010-07-13

申请人： Jorgen Karlsson ,  Tim Irnich ,  Jonas Kronander ,  Mikael Prytz ,  Muhammad Imadur Rahman

发明人： Jorgen Karlsson ,  Tim Irnich ,  Jonas Kronander ,  Mikael Prytz ,  Muhammad Imadur Rahman

IPC分类号： H04W16/14

CPC分类号： H04W16/14

摘要： A node (105, 200) for a communications system (100), arranged to operate as a secondary user of part of a frequency spectrum, comprising a detection unit (210) for detecting other secondary users (110) who use all or part of said frequency spectrum and for detecting changes in such other secondary user's usage of their part of the frequency spectrum. The node (105, 200) also comprises a signaling unit (225) for signaling to detected other secondary users (110) that the node (105, 200) wishes to operate within their frequency spectrum as a secondary user, by means of transmitting interference signals according to a predefined pattern in the frequency spectrum of detected other secondary users. The node also comprises a decision unit (230) for deciding how the node (105, 200) should arrange its secondary operation in the frequency spectrum together with detected other secondary users (110).

摘要翻译： 一种用于通信系统（100）的节点（105,200），被布置为作为频谱的一部分的次要用户操作，包括检测单元（210），用于检测使用全部或部分 所述频谱和用于检测这些其他次要用户对其频谱的部分使用的变化。 节点（105,200）还包括信令单元（225），用于通过传输干扰来向所检测的其他次要用户（110）通知所述节点（105,200）希望在其频谱内作为次要用户操作的信令单元 根据检测到的其他次要用户的频谱中的预定义模式的信号。 所述节点还包括决定单元（230），用于决定所述节点（105,200）如何与检测到的其他次要用户（110）一起在频谱中布置其次要操作。

公开(公告)号：US20110080969A1

公开(公告)日：2011-04-07

申请号：US12817476

申请日：2010-06-17

申请人： George Jöngren ,  Muhammad Imadur Rahman

发明人： George Jöngren ,  Muhammad Imadur Rahman

IPC分类号： H04L1/02

CPC分类号： H04L1/0029 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0634 ,  H04B7/065 ,  H04L1/0693

摘要： A communications system comprises a second device (28) and a first device (30). The first device (30) is of a type which receives, on a downlink over a radio interface from a second device, precoded information (29). In an example mode the first device 28 generates a multi-part feedback signal (22) which is configured to affect content of a precoder matrix (40) utilized by the second device (28). On an uplink over the radio interface to the second device, at least two different parts of the multi-part feedback signal are transmitted with two respective different transmission granularities in time and/or frequency.

摘要翻译： 通信系统包括第二设备（28）和第一设备（30）。 第一设备（30）是一种类型，其在来自第二设备的无线电接口的下行链路上接收预编码信息（29）。 在示例模式中，第一设备28产生多部分反馈信号（22），其被配置为影响由第二设备（28）使用的预编码器矩阵（40）的内容。 在通过到第二设备的无线电接口的上行链路上，多部分反馈信号的至少两个不同部分在时间和/或频率上以两个不同的传输粒度发射。

公开(公告)号：US07768987B2

公开(公告)日：2010-08-03

申请号：US11527313

申请日：2006-09-26

申请人： Muhammad Imadur Rahman ,  Ragnar Viôir Reynisson ,  Frank Hanns Paul Fitzek ,  Ramjee Prasad ,  Jin-Kyu Koo ,  Dong-Seek Park ,  Young-Kwon Cho ,  Young-Kyun Kim ,  Eun-Taek Lim ,  Jun-Young Jung

发明人： Muhammad Imadur Rahman ,  Ragnar Viôir Reynisson ,  Frank Hanns Paul Fitzek ,  Ramjee Prasad ,  Jin-Kyu Koo ,  Dong-Seek Park ,  Young-Kwon Cho ,  Young-Kyun Kim ,  Eun-Taek Lim ,  Jun-Young Jung

IPC分类号： H04B7/208

CPC分类号： H04L1/0001 ,  H04B1/7156 ,  H04L1/0033 ,  H04L27/2608

摘要： A frequency resource operating apparatus and method for transmitting and receiving data at a different hopping pattern speed according to a CSI in a BWA communication system are provided. In a method of transmitting and receiving data using CSI in a mobile communication system, a BS sets the CSI of an MS to an initial CSI and sends data to the MS according to the initial CSI. The MS sends a downlink CSI to the BS. The BS groups the MS based on the downlink CSI and sends data to the MS according to a hopping pattern for the group of the MS among hopping patterns preset for predetermined groups.

摘要翻译： 提供了一种根据BWA通信系统中的CSI以不同跳频图形速度发送和接收数据的频率资源操作装置和方法。 在移动通信系统中使用CSI发送和接收数据的方法中，BS将MS的CSI设置为初始CSI，并根据初始CSI向MS发送数据。 MS向BS发送下行链路CSI。 BS基于下行链路CSI对MS进行分组，并且根据针对预定组预定的跳频模式中的MS组的跳频模式向MS发送数据。