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    Allocating Antennas for Cyclic Delay Diversity Transmission
    1.
    发明申请
    Allocating Antennas for Cyclic Delay Diversity Transmission 有权
    分配天线用于循环延迟分集传输

    公开(公告)号：US20110223870A1

    公开(公告)日：2011-09-15

    申请号：US12815540

    申请日：2010-06-15

    申请人： Djordje Tujkovic ,  Vummintala Shashidhar ,  Erik Stauffer ,  Rishi Ranjan ,  Soumen Chakraborty ,  Bertrand Hochwald ,  Sriram Rajagopal ,  Sam Alex

    发明人： Djordje Tujkovic ,  Vummintala Shashidhar ,  Erik Stauffer ,  Rishi Ranjan ,  Soumen Chakraborty ,  Bertrand Hochwald ,  Sriram Rajagopal ,  Sam Alex

    IPC分类号： H04B7/02 ,  H04B1/38

    CPC分类号： H04B7/0671 ,  H04B7/0691

    摘要： Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.

    摘要翻译： 公开了分配用于循环延迟分集（CDD）传输的天线的方法和装置。 一种方法包括估计具有多个天线的收发机的传输信道。 基于估计的传输信道来选择多个收发天线的子集。 基于单个收发器天线的传输路径的信道质量来识别该子集的单个收发天线。 从多个天线的子集中发送循环延迟分集（CDD）信号，其中从所述多个收发器天线的子集的所识别的单个收发器天线发送最小延迟的CDD信号。

    Allocating antennas for cyclic delay diversity transmission
    2.
    发明授权
    Allocating antennas for cyclic delay diversity transmission 有权
    分配天线进行循环延迟分集传输

    公开(公告)号：US08675761B2

    公开(公告)日：2014-03-18

    申请号：US12815540

    申请日：2010-06-15

    申请人： Djordje Tujkovic ,  Vummintala Shashidhar ,  Erik Stauffer ,  Rishi Ranjan ,  Soumen Chakraborty ,  Bertrand Hochwald ,  Sriram Rajagopal ,  Sam Alex

    发明人： Djordje Tujkovic ,  Vummintala Shashidhar ,  Erik Stauffer ,  Rishi Ranjan ,  Soumen Chakraborty ,  Bertrand Hochwald ,  Sriram Rajagopal ,  Sam Alex

    IPC分类号： H04L1/02

    CPC分类号： H04B7/0671 ,  H04B7/0691

    摘要： Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.

    摘要翻译： 公开了分配用于循环延迟分集（CDD）传输的天线的方法和装置。 一种方法包括估计具有多个天线的收发机的传输信道。 基于估计的传输信道来选择多个收发天线的子集。 基于单个收发器天线的传输路径的信道质量来识别该子集的单个收发天线。 从多个天线的子集中发送循环延迟分集（CDD）信号，其中从所述多个收发器天线的子集的所识别的单个收发器天线发送最小延迟的CDD信号。

    Selecting a transmission mode between a subscriber and a base station
    5.
    发明申请
    Selecting a transmission mode between a subscriber and a base station 有权
    选择用户和基站之间的传输模式

    公开(公告)号：US20090316636A1

    公开(公告)日：2009-12-24

    申请号：US12456562

    申请日：2009-06-18

    申请人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    发明人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    IPC分类号： H04W74/00

    CPC分类号： H04W72/085 ,  H04L1/002 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0094

    摘要： Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.

    摘要翻译： 公开了在用户和基站之间选择传输模式的方法和装置的实施例。 一种方法包括确定预测窗口。 对瞬时信道质量测量进行平均，其中平均取决于预测窗口的大小。 基于平均的瞬时信道质量测量来确定传输模式的第一估计。 基于合格的下行链路传输的接收来计算余量。 通过用余量更新第一估计来选择传输模式。

    Method and apparatus for link adaptation in a wireless communication network
    6.
    发明授权
    Method and apparatus for link adaptation in a wireless communication network 有权
    无线通信网络中链路自适应的方法和装置

    公开(公告)号：US08942184B2

    公开(公告)日：2015-01-27

    申请号：US12456471

    申请日：2009-06-16

    申请人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    发明人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    IPC分类号： H04W4/00 ,  H04W28/18 ,  H04W40/12

    CPC分类号： H04W28/18 ,  H04W40/12

    摘要： A method and apparatus for link adaptation in a wireless communication network is provided. The method includes computing a first channel quality parameter based on one or more channel quality parameters. The one or more channel quality parameters are associated with a communication link between a Mobile Station (MS) and a Base Station (BS). The method further includes determining a qualifying transmission unit to compute a correction parameter. The correction parameter is computed based on the first channel quality parameter and one or more transmission parameters. The one or more transmission parameter is associated with the communication link. Thereafter, the method schedules a transmission mode of the communication link based on a second channel quality parameter. The second channel quality parameter is estimated based the first channel quality parameter and the correction parameter.

    摘要翻译： 提供了一种用于无线通信网络中的链路自适应的方法和装置。 该方法包括基于一个或多个信道质量参数来计算第一信道质量参数。 一个或多个信道质量参数与移动站（MS）和基站（BS）之间的通信链路相关联。 该方法还包括确定合格传输单元以计算校正参数。 基于第一信道质量参数和一个或多个传输参数来计算校正参数。 一个或多个传输参数与通信链路相关联。 此后，该方法基于第二信道质量参数调度通信链路的传输模式。 基于第一信道质量参数和校正参数来估计第二信道质量参数。

    Selecting a transmission mode between a subscriber and a base station
    7.
    发明授权
    Selecting a transmission mode between a subscriber and a base station 有权
    选择用户和基站之间的传输模式

    公开(公告)号：US08750236B2

    公开(公告)日：2014-06-10

    申请号：US13618895

    申请日：2012-09-14

    申请人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    发明人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    IPC分类号： H04W72/02

    CPC分类号： H04W72/085 ,  H04L1/002 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0094

    摘要： Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.

    摘要翻译： 公开了在用户和基站之间选择传输模式的方法和装置的实施例。 一种方法包括确定预测窗口。 对瞬时信道质量测量进行平均，其中平均取决于预测窗口的大小。 基于平均的瞬时信道质量测量来确定传输模式的第一估计。 基于合格的下行链路传输的接收来计算余量。 通过用余量更新第一估计来选择传输模式。

    Downlink coordinated transmission in OFDMA systems, including WiMax systems
    8.
    发明申请
    Downlink coordinated transmission in OFDMA systems, including WiMax systems 失效
    OFDMA系统中的下行协调传输，包括WiMax系统

    公开(公告)号：US20070217369A1

    公开(公告)日：2007-09-20

    申请号：US11725920

    申请日：2007-03-20

    申请人： David Garrett ,  Bertrand Hochwald ,  Arogyaswami Paulraj ,  Djordje Tujkovic ,  Louay Jalloul

    发明人： David Garrett ,  Bertrand Hochwald ,  Arogyaswami Paulraj ,  Djordje Tujkovic ,  Louay Jalloul

    IPC分类号： H04J3/00

    CPC分类号： H04L5/0058 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/023 ,  H04L27/2608 ,  H04W16/10 ,  H04W16/24 ,  H04W72/082 ,  H04W72/085

    摘要： Embodiments described herein include methods for improving the SINR, and therefore communication quality or rate, in the downlink of a cellular communication system. In an embodiment, the system is an orthogonal-frequency-division multiple-access (OFDMA) system. In an embodiment, a set of terminals is designated a coordinated-transmission group. The set of terminal is chosen such that the slot-allocations of the set are given special treatment to alleviate interference from other sectors or cells. In an embodiment, “zones” defined in the WiMax standard are “repurposed” to handle the coordinated-transmission, although the zone was originally intended for another purpose.

    摘要翻译： 本文描述的实施例包括用于在蜂窝通信系统的下行链路中改善SINR以及因此通信质量或速率的方法。 在一个实施例中，该系统是正交频分多址（OFDMA）系统。 在一个实施例中，一组终端被指定为协调传输组。 选择终端的集合，使得该组的时隙分配被给予特殊处理以减轻来自其他扇区或小区的干扰。 在一个实施例中，WiMax标准中定义的“区域”被“重新利用”以处理协调传输，尽管该区域原本是为了另一目的。

    Selecting a transmission mode between a subscriber and a base station
    10.
    发明授权
    Selecting a transmission mode between a subscriber and a base station 有权
    选择用户和基站之间的传输模式

    公开(公告)号：US08311003B2

    公开(公告)日：2012-11-13

    申请号：US12456562

    申请日：2009-06-18

    申请人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    发明人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    IPC分类号： H04W4/00 ,  H04J3/16

    CPC分类号： H04W72/085 ,  H04L1/002 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0094

    摘要： Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.

    摘要翻译： 公开了在用户和基站之间选择传输模式的方法和装置的实施例。 一种方法包括确定预测窗口。 对瞬时信道质量测量进行平均，其中平均取决于预测窗口的大小。 基于平均的瞬时信道质量测量来确定传输模式的第一估计。 基于合格的下行链路传输的接收来计算余量。 通过用余量更新第一估计来选择传输模式。