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    PILOTS FOR MIMO COMMUNICATION SYSTEMS
    2.
    发明申请
    PILOTS FOR MIMO COMMUNICATION SYSTEMS 有权
    用于MIMO通信系统的PILOTS

    公开(公告)号：US20150365147A1

    公开(公告)日：2015-12-17

    申请号：US14836620

    申请日：2015-08-26

    Applicant: QUALCOMM Incorporated

    Inventor： John Ketchum ,  Mark Wallace ,  J. Rodney Walton ,  Steven Howard

    IPC: H04B7/04 ,  H04L5/00 ,  H04L27/26

    CPC classification number: H04B7/0421 ,  H04B7/043 ,  H04B7/0615 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/006 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2027/0089 ,  H04W16/28 ,  H04W28/20 ,  H04W52/50

    Abstract: Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot.

    Abstract translation: 描述适用于MIMO系统并能够支持各种功能的飞行员。 各种类型的导频包括信标导频，MIMO导频，导向参考或导向导频，以及载波导频。 信标导频从所有发射天线发射，并可用于定时和频率采集。 MIMO导频是从所有发射天线发射的，但由分配给发射天线的不同正交码覆盖。 MIMO导频可以用于信道估计。 引导参考在MIMO信道的特定本征模式上发送，并且是用户终端特定的。 转向参考可用于信道估计。 载波导频可以在指定的子带/天线上发射，并且可以用于载波信号的相位跟踪。 可以基于这些各种类型的飞行员的不同组合来设计各种导频传输方案。

    Multi-antenna transmission for spatial division multiple access
    4.
    发明授权
    Multi-antenna transmission for spatial division multiple access 有权

    公开(公告)号：US10128920B2

    公开(公告)日：2018-11-13

    申请号：US15405934

    申请日：2017-01-13

    Applicant: QUALCOMM Incorporated

    Inventor： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

    IPC: H04B7/04 ,  H04B17/309 ,  H04W16/28 ,  H04B7/06 ,  H04B7/0408 ,  H04B7/0426 ,  H04B7/0417 ,  H04B7/0413

    Abstract: An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

    PEER-TO-PEER COMMUNICATION IN AD HOC WIRELESS NETWORK
    7.
    发明申请
    PEER-TO-PEER COMMUNICATION IN AD HOC WIRELESS NETWORK 有权
    公共无线网络中的对等通信

    公开(公告)号：US20130182614A1

    公开(公告)日：2013-07-18

    申请号：US13788841

    申请日：2013-03-07

    Applicant: QUALCOMM Incorporated

    Inventor： Ravi KUMAR ,  J. Rodney Walton ,  Qiang Fu ,  Subrahmanyam Dravida

    IPC: H04W28/02 ,  H04W84/18

    CPC classification number: H04W76/11 ,  H04L63/0428 ,  H04W8/005 ,  H04W12/04 ,  H04W12/06 ,  H04W28/0268 ,  H04W48/16 ,  H04W84/18

    Abstract: For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. The wireless device may also performs IP address discovery using the user-specific identifier for the target wireless device.

    Abstract translation: 对于在自组织无线网络中的对等呼叫，无线设备执行目标无线设备的发现，执行目标无线设备的认证并生成会话密钥（例如，使用预共享密钥或证书 在无线设备上提供）与目标无线设备形成自组织无线网络，并经由自组织无线网络与目标无线设备进行点对点通信。 无线设备可以使用指定与该无线设备进行通信的无线设备的标识符列表来执行发现。 无线设备可以基于其用户特定标识符（例如，其电话号码）和/或用于目标无线设备的用户特定标识符来导出用于标识自组织无线网络的服务集标识符（SSID）。 无线设备还可以使用目标无线设备的用户特定标识符来执行IP地址发现。

    Peer-to-peer communication in ad hoc wireless network
    9.
    发明授权
    Peer-to-peer communication in ad hoc wireless network 有权
    ad hoc无线网络中的对等通信

    公开(公告)号：US08942130B2

    公开(公告)日：2015-01-27

    申请号：US13788841

    申请日：2013-03-07

    Applicant: QUALCOMM Incorporated

    Inventor： Ravi Kumar ,  J. Rodney Walton ,  Qiang Fu ,  Subrahmanyam Dravida

    IPC: H04L12/26 ,  G08C15/00 ,  H04J3/24 ,  H04L12/28 ,  H04W76/02 ,  H04L29/06 ,  H04W48/16 ,  H04W28/02 ,  H04W84/18 ,  H04W8/00 ,  H04W12/04 ,  H04W12/06

    CPC classification number: H04W76/11 ,  H04L63/0428 ,  H04W8/005 ,  H04W12/04 ,  H04W12/06 ,  H04W28/0268 ,  H04W48/16 ,  H04W84/18

    Abstract: For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. The wireless device may also performs IP address discovery using the user-specific identifier for the target wireless device.

    Abstract translation: 对于在自组织无线网络中的对等呼叫，无线设备执行目标无线设备的发现，执行目标无线设备的认证并生成会话密钥（例如，使用预共享密钥或证书 在无线设备上提供）与目标无线设备形成自组织无线网络，并经由自组织无线网络与目标无线设备进行点对点通信。 无线设备可以使用指定与该无线设备进行通信的无线设备的标识符列表来执行发现。 无线设备可以基于其用户特定标识符（例如，其电话号码）和/或用于目标无线设备的用户特定标识符导出用于标识自组织无线网络的服务集标识符（SSID）。 无线设备还可以使用目标无线设备的用户特定标识符来执行IP地址发现。

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