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    Apparatus and Method For Transmit Diversity And Beamforming In A Wireless Network
    1.
    发明申请
    Apparatus and Method For Transmit Diversity And Beamforming In A Wireless Network 有权
    无线网络中发射分集和波束成形的装置和方法

    公开(公告)号：US20080039030A1

    公开(公告)日：2008-02-14

    申请号：US11779052

    申请日：2007-07-17

    申请人： Farooq Khan ,  Cornelius Van Rensburg ,  Jiann-An Tsai

    发明人： Farooq Khan ,  Cornelius Van Rensburg ,  Jiann-An Tsai

    IPC分类号： H04B1/02

    CPC分类号： H04B7/0689 ,  H04B7/0617 ,  H04B7/0671

    摘要： A base station for use in a wireless network communicating with a plurality of subscriber stations. The base station transmits in a downlink channel to a first subscriber station using a plurality of transmit antennas. The base station transmits to the first subscriber station using either a transmit diversity scheme or a beamforming scheme according to the amount of correlation between the transmit antennas observed at the first subscriber station. The base station also transmits to the first subscriber station using a cyclic delay diversity scheme having either zero delay or non-zero delay according to the amount of antenna/channel correlation observed at the first subscriber station.

    摘要翻译： 一种用于与多个用户台通信的无线网络中的基站。 基站使用多个发射天线在下行链路信道中向第一用户台发送。 根据在第一用户台观测到的发射天线之间的相关量，基站使用发射分集方案或波束成形方案向第一用户台发送。 根据在第一用户台观测到的天线/信道相关量，基站还使用具有零延迟或非零延迟的循环延迟分集方案向第一用户台发送。

    Orthogonal repetition and hybrid ARQ scheme
    3.
    发明申请
    Orthogonal repetition and hybrid ARQ scheme 审中-公开
    正交重复和混合ARQ方案

    公开(公告)号：US20080151831A1

    公开(公告)日：2008-06-26

    申请号：US11806660

    申请日：2007-06-01

    申请人： Farooq Khan ,  Cornelius Van Rensburg ,  Zhouyue Pi ,  Jiann-An Tsai ,  Yinong Ding

    发明人： Farooq Khan ,  Cornelius Van Rensburg ,  Zhouyue Pi ,  Jiann-An Tsai ,  Yinong Ding

    IPC分类号： H04Q7/30

    CPC分类号： H04L1/0656 ,  H04L1/0668 ,  H04L1/1812 ,  H04L1/1845 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0023

    摘要： A multi-user, multiple input, multiple output network and process for transmitting data in a communication system encompassing multiple users, contemplates the steps of: a first user transmitting a first transmission frame to a base transceiver station while a second user simultaneously transmits a third transmission frame to the base station; the first and second users simultaneously transmit a second transmission frame and a fourth transmission frames respectively to the base station, with the second transmission frame being an orthogonally spread version of the first transmission frame, and the fourth transmission frame being an orthogonally spread version of the second transmission frame.

    摘要翻译： 用于在包含多个用户的通信系统中传输数据的多用户，多输入，多输出网络和过程考虑了以下步骤：第一用户将第一传输帧发送到基站收发器，而第二用户同时发送第三个 传输帧到基站; 第一和第二用户同时将第二传输帧和第四传输帧发送到基站，其中第二传输帧是第一传输帧的正交扩展版本，第四传输帧是正交扩展版本的 第二传输帧。

    Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems
    5.
    发明授权
    Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems 有权
    用于OFDM无线系统的基于码本的单用户闭环发射波束成形（SU-CLTB）的方法和装置

    公开(公告)号：US08254487B2

    公开(公告)日：2012-08-28

    申请号：US12149108

    申请日：2008-04-25

    申请人： Jiann-An Tsai ,  Cornelius Van Rensburg ,  Jianzhong Zhang

    发明人： Jiann-An Tsai ,  Cornelius Van Rensburg ,  Jianzhong Zhang

    IPC分类号： H04B7/02 ,  H04L1/02

    CPC分类号： H04B1/59 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0641 ,  H04B7/0684 ,  H04B7/10 ,  H04L27/2601

    摘要： A method includes broadcasting, at a transmitter, messages comprising antenna configuration, antenna spacing and a number of antenna of the transmitter and reference signals; generating, at a receiver, a codebook comprising a plurality of antenna beams based on the broadcasted messages; receiving, at the receiver, the broadcasted reference signals; selecting, at the receiver, an antenna beam among the plurality of antenna beams within the codebook in dependence upon a predetermined performance criteria of a data communication system and in dependence upon the broadcasted reference signals; feedbacking to the transmitter, at the receiver, information comprising the antenna beam selected by the receiver; optimizing, at the transmitter, a beamforming process by utilizing the feedback information from the receiver; transmitting, at the transmitter, data signals by utilizing the optimized beamforming process; and receiving and processing, at the receiver, the data signals in dependence upon the selected antenna beams within the codebook.

    摘要翻译： 一种方法包括在发射机处广播包括天线配置，天线间隔和发射机和参考信号的天线数量的消息; 在接收机处，基于广播的消息，生成包括多个天线波束的码本; 在接收机处接收广播的参考信号; 根据数据通信系统的预定性能标准，并根据广播的参考信号，在接收机中选择码本内的多个天线波束之间的天线波束; 在接收机处反馈给发射机，包括由接收机选择的天线波束的信息; 在发射机处利用来自接收机的反馈信息来优化波束成形过程; 通过利用优化的波束形成过程在发射机发射数据信号; 并且在接收机处根据码本内的所选择的天线波束接收和处理数据信号。

    Method and system for performing a soft handoff in an OFDMA wireless network
    6.
    发明授权
    Method and system for performing a soft handoff in an OFDMA wireless network 有权
    用于在OFDMA无线网络中执行软切换的方法和系统

    公开(公告)号：US07885660B2

    公开(公告)日：2011-02-08

    申请号：US11215330

    申请日：2005-08-30

    申请人： Cornelius Van Rensburg ,  Yinong Ding ,  Jiann-An Tsai

    发明人： Cornelius Van Rensburg ,  Yinong Ding ,  Jiann-An Tsai

    IPC分类号： H04Q7/20

    CPC分类号： H04W36/18 ,  H04W36/30

    摘要： A method for performing a soft handoff for a mobile station from a source base station to a target base station in an Orthogonal Frequency-Division Multiple Access (OFDMA) wireless network that is capable of communicating with a plurality of mobile stations in a coverage area of the OFDMA wireless network is provided. The method includes determining whether a relative delay between receipt of a source pilot signal from a source base station and receipt of a target pilot signal from a target base station is less than a downlink coherence time. When the relative delay is less than the downlink coherence time, the soft handoff is performed.

    摘要翻译： 一种用于在正交频分多址（OFDMA）无线网络中从源基站到目标基站执行移动台的软越区切换的方法，其能够与覆盖区域中的多个移动站进行通信 提供了OFDMA无线网络。 该方法包括确定从源基站接收源导频信号和从目标基站接收目标导频信号之间的相对延迟是否小于下行链路相干时间。 当相对延迟小于下行链路相干时间时，执行软切换。

    Apparatus and method for downlink spatial division multiple access scheduling in a wireless network
    7.
    发明授权
    Apparatus and method for downlink spatial division multiple access scheduling in a wireless network 失效
    用于无线网络中的下行链路空分多址调度的装置和方法

    公开(公告)号：US07536205B2

    公开(公告)日：2009-05-19

    申请号：US11128772

    申请日：2005-05-13

    申请人： Cornelius Van Rensburg ,  Jiann-An Tsai ,  Lai King Tee

    发明人： Cornelius Van Rensburg ,  Jiann-An Tsai ,  Lai King Tee

    IPC分类号： H04M1/00

    CPC分类号： H04W72/1273 ,  H04B7/0617 ,  H04W52/346 ,  H04W72/046 ,  H04W72/1247

    摘要： A base station for communicating with mobile stations in a coverage area of the wireless network. The base station comprises: 1) a transceiver for transmitting downlink OFDMA signals to each mobile station; 2) an antenna array for transmitting the downlink OFDMA signals to the mobile stations using spatially directed beams; and 3) an SDMA scheduling controller for scheduling downlink transmissions to the mobile stations. The SDMA scheduling controller determines a first mobile station having a highest priority and schedules the first mobile station for downlink transmission in a particular time-frequency slot. The SDMA scheduling controller then determines additional mobile stations that are spatially uncorrelated with the first mobile station, as well as each other, and schedules the additional mobile stations for downlink transmission in that particular time-frequency slot according to priority.

    摘要翻译： 用于与无线网络的覆盖区域中的移动台进行通信的基站。 该基站包括：1）用于向每个移动台发送下行OFDMA信号的收发信机; 2）天线阵列，用于使用空间定向波束将下行链路OFDMA信号发射到移动台; 以及3）用于调度到移动站的下行链路传输的SDMA调度控制器。 SDMA调度控制器确定具有最高优先级的第一移动台，并且在特定的时隙中调度第一移动台进行下行链路传输。 然后，SDMA调度控制器确定与第一移动站空间上不相关的另外的移动站，以及彼此之间，并根据优先级调度附加的移动站用于该特定时隙中的下行链路传输。

    Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems
    8.
    发明申请
    Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems 有权
    用于OFDM无线系统的基于码本的单用户闭环发射波束成形（SU-CLTB）的方法和装置

    公开(公告)号：US20090041150A1

    公开(公告)日：2009-02-12

    申请号：US12149108

    申请日：2008-04-25

    申请人： Jiann-An Tsai ,  Cornelius Van Rensburg ,  Jianzhong Zhang

    发明人： Jiann-An Tsai ,  Cornelius Van Rensburg ,  Jianzhong Zhang

    IPC分类号： H04L27/02 ,  H04B7/02 ,  H04J11/00

    CPC分类号： H04B1/59 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0641 ,  H04B7/0684 ,  H04B7/10 ,  H04L27/2601

    摘要： A method includes broadcasting, at a transmitter, messages comprising antenna configuration, antenna spacing and a number of antenna of the transmitter and reference signals; generating, at a receiver, a codebook comprising a plurality of antenna beams based on the broadcasted messages; receiving, at the receiver, the broadcasted reference signals; selecting, at the receiver, an antenna beam among the plurality of antenna beams within the codebook in dependence upon a predetermined performance criteria of a data communication system and in dependence upon the broadcasted reference signals; feedbacking to the transmitter, at the receiver, information comprising the antenna beam selected by the receiver; optimizing, at the transmitter, a beamforming process by utilizing the feedback information from the receiver; transmitting, at the transmitter, data signals by utilizing the optimized beamforming process; and receiving and processing, at the receiver, the data signals in dependence upon the selected antenna beams within the codebook.

    摘要翻译： 一种方法包括在发射机处广播包括天线配置，天线间隔和发射机和参考信号的天线数量的消息; 在接收机处，基于广播的消息，生成包括多个天线波束的码本; 在接收机处接收广播的参考信号; 根据数据通信系统的预定性能标准，并根据广播的参考信号，在接收机中选择码本内的多个天线波束之间的天线波束; 在接收机处反馈给发射机，包括由接收机选择的天线波束的信息; 在发射机处利用来自接收机的反馈信息来优化波束成形过程; 通过利用优化的波束形成过程在发射机发射数据信号; 并且在接收机处根据码本内的所选择的天线波束接收和处理数据信号。

    Method and system for performing a soft handoff in an OFDMA wireless network
    9.
    发明申请
    Method and system for performing a soft handoff in an OFDMA wireless network 有权
    用于在OFDMA无线网络中执行软切换的方法和系统

    公开(公告)号：US20070049279A1

    公开(公告)日：2007-03-01

    申请号：US11215330

    申请日：2005-08-30

    申请人： Cornelius Van Rensburg ,  Yinong Ding ,  Jiann-An Tsai

    发明人： Cornelius Van Rensburg ,  Yinong Ding ,  Jiann-An Tsai

    IPC分类号： H04Q7/20

    CPC分类号： H04W36/18 ,  H04W36/30

    摘要： A method for performing a soft handoff for a mobile station from a source base station to a target base station in an Orthogonal Frequency-Division Multiple Access (OFDMA) wireless network that is capable of communicating with a plurality of mobile stations in a coverage area of the OFDMA wireless network is provided. The method includes determining whether a relative delay between receipt of a source pilot signal from a source base station and receipt of a target pilot signal from a target base station is less than a downlink coherence time. When the relative delay is less than the downlink coherence time, the soft handoff is performed.

    摘要翻译： 一种用于在正交频分多址（OFDMA）无线网络中从源基站到目标基站执行移动台的软越区切换的方法，其能够与覆盖区域中的多个移动站进行通信 提供了OFDMA无线网络。 该方法包括确定从源基站接收源导频信号和从目标基站接收目标导频信号之间的相对延迟是否小于下行链路相干时间。 当相对延迟小于下行链路相干时间时，执行软切换。