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：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：US20180270856A1

公开(公告)日：2018-09-20

申请号：US15986595

申请日：2018-05-22

申请人： Imadur RAHMAN ,  Joakim AXMON ,  Muhammad KAZMI

发明人： Imadur RAHMAN ,  Joakim AXMON ,  Muhammad KAZMI

IPC分类号： H04W74/00 ,  H04L5/22 ,  H04L5/00 ,  H04W84/04 ,  H04W88/06 ,  H04W88/08 ,  H04W88/02

CPC分类号： H04W74/008 ,  H04L5/0005 ,  H04L5/22 ,  H04W84/042 ,  H04W88/02 ,  H04W88/06 ,  H04W88/08

摘要： A wireless device and method for performing cell configuration. The wireless device and a first network node serving the wireless device are operating in a wireless communications network, wherein the first network node manages a first serving cell. When the wireless device is to send a second Random Access transmission in the first serving cell to the first network node while preparing to perform or performing configuration of a second serving cell managed by a second network node, the wireless device configures the second serving cell using a configuration time delay Tact_PSCell comprising at least a time delay TRA_PCell due to the second RA transmission, otherwise the wireless device configures the second serving cell using the configuration time delay Tact_PSCell excluding the time delay TRA_PCell due to the second RA transmission.

公开(公告)号：US20110149813A1

公开(公告)日：2011-06-23

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

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：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：US20150334764A1

公开(公告)日：2015-11-19

申请号：US14708750

申请日：2015-05-11

申请人： Imadur Rahman ,  Muhammad Kazmi

发明人： Imadur Rahman ,  Muhammad Kazmi

IPC分类号： H04W76/02 ,  H04W24/02

CPC分类号： H04W76/15 ,  H04L5/001 ,  H04L5/0092 ,  H04W16/14 ,  H04W24/02 ,  H04W72/0406

摘要： A method comprises obtaining component carrier information for a user equipment, the component carrier information comprising information about one or more component carriers currently configured at the user equipment for dual connectivity operation, and obtaining capability information for the user equipment, the capability information comprising information about a maximum number of component carriers that the user equipment can use for dual connectivity operation. The method comprises configuring one or more component carriers at the user equipment such that a total number of component carriers configured at the user equipment does not exceed the maximum number of component carriers that the user equipment can use for dual connectivity operation, the one or more component carriers configured according to one or more predefined rules and based at least in part on one or more of the component carrier information for the user equipment and the capability information for the user equipment.

摘要翻译： 一种方法包括获得用户设备的分量载波信息，所述分量载波信息包括关于当前在用户设备处配置的用于双连接性操作的一个或多个分量载波的信息，以及获得用户设备的能力信息，所述能力信息包括关于 用户设备可以用于双连接操作的最大数量的分量载波。 该方法包括在用户设备处配置一个或多个分量载波，使得在用户设备处配置的分量载波的总数不超过用户设备可以用于双连接性操作的分量载波的最大数量，所述一个或多个 分量载波根据一个或多个预定规则配置，并且至少部分地基于用户设备的一个或多个分量载波信息和用户设备的能力信息。

公开(公告)号：US08958835B2

公开(公告)日：2015-02-17

申请号：US13042038

申请日：2011-03-07

申请人： Havish Koorapaty ,  Kumar Balachandran ,  Mohammad Imadur Rahman ,  Joachim Sachs

发明人： Havish Koorapaty ,  Kumar Balachandran ,  Mohammad Imadur Rahman ,  Joachim Sachs

IPC分类号： H04B7/00 ,  H04W24/02 ,  H04W16/16 ,  H04W64/00 ,  G01S5/02 ,  H04W72/04

CPC分类号： H04W24/02 ,  G01S5/0242 ,  H04W16/16 ,  H04W64/003 ,  H04W72/048

摘要： Wireless communication methods determine a position of a first wireless base station. A wireless communication frequency to be used by the first wireless base station is determined by identifying a common frequency that can be used at a plurality of locations surrounding and spaced apart from the position of the first wireless base station that was determined. The first wireless base station may be a femto-base station and the frequency may be an unlicensed frequency. Related systems and devices are also described.

摘要翻译： 无线通信方法确定第一无线基站的位置。 通过识别可以在确定的第一无线基站的位置周围和间隔开的多个位置处使用的公共频率来确定要由第一无线基站使用的无线通信频率。 第一无线基站可以是毫微微基站，并且该频率可以是非许可频率。 还描述了相关系统和设备。

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。