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    Systems and methods for performing precoding in multi-user systems
    71.
    发明授权
    Systems and methods for performing precoding in multi-user systems 有权

    公开(公告)号：US09673878B1

    公开(公告)日：2017-06-06

    申请号：US13963281

    申请日：2013-08-09

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Yihong Qi

    IPC: H04B7/02 ,  H04L1/02 ,  H04B7/0452

    CPC classification number: H04B7/0452 ,  H04B7/0626

    Abstract: Systems and methods are provided for precoding a signal at a transmitter. A plurality of receiver devices is identified, and a first receiver device is selected from the plurality of receiver devices. The transmitter communicates with the first receiver device over a channel, and an estimate of the channel is determined. A precoding matrix is computed based on the estimate, such that when the transmitter transmits a signal that is precoded with the precoding matrix over the channel, interference from a second receiver device of the plurality of receiver devices over the channel is reduced.

    Tone block allocation for orthogonal frequency division multiple access data unit
    74.
    发明授权
    Tone block allocation for orthogonal frequency division multiple access data unit 有权
    正交频分多址数据单元的音调分配

    公开(公告)号：US09596060B1

    公开(公告)日：2017-03-14

    申请号：US14707898

    申请日：2015-05-08

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Yakun Sun ,  Mingguang Xu ,  Hongyuan Zhang ,  Liwen Chu ,  Lei Wang ,  Hui-Ling Lou ,  Jinjing Jiang

    IPC: H04W72/04 ,  H04W52/02 ,  H04L5/00 ,  H04L27/26 ,  H04W84/12

    CPC classification number: H04L5/0007 ,  H04L5/0025 ,  H04L5/0037 ,  H04L5/0094 ,  H04L27/2602 ,  H04L27/2608 ,  H04L27/2613 ,  H04W84/12

    Abstract: A method for transmitting a first field and one or more second fields is described. A number of devices in a group of multiple devices to which a first OFDMA data unit is to be transmitted is selected. A block allocation that indicates respective integer numbers of different tone blocks of a WLAN communication channel to be assigned to each device in the group of multiple devices is selected. A first field is encoded to indicate both the selected number of devices in the group and the selected block allocation. One or more second fields are encoded to indicate a respective device identifier for each device in the group of multiple devices. The first field and the one or more second fields are transmitted to each device in the group of multiple devices.

    Abstract translation: 描述用于发送第一场和一个或多个第二场的方法。 选择要发送第一OFDMA数据单元的多个设备的组中的多个设备。 选择指示要分配给多个设备的组中的每个设备的WLAN通信信道的不同音调块的各个整数的块分配。 第一字段被编码以指示组中所选择的设备数量和所选择的块分配。 一个或多个第二字段被编码以指示多个设备组中的每个设备的相应设备标识符。 第一字段和一个或多个第二字段被发送到多个设备组中的每个设备。

    Method and apparatus for determining a location of a network device in a wireless network
    75.
    发明授权
    Method and apparatus for determining a location of a network device in a wireless network 有权
    用于确定无线网络中的网络设备的位置的方法和装置

    公开(公告)号：US09474041B1

    公开(公告)日：2016-10-18

    申请号：US14969503

    申请日：2015-12-15

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Liwen Chu ,  Sudhir Srinivasa

    IPC: H04W24/00 ,  H04W64/00 ,  H04W4/02

    CPC classification number: H04W64/00 ,  G01S5/10 ,  H04W4/02

    Abstract: A first access point including a receiver, a transmitter, a feedback module, and a location determining module. The receiver receives a first frame from a client station. The transmitter transmits a second frame to the client station. The first and second frames are also received by second and third devices, which are located at predetermined locations. The feedback module receives a first feedback from the client station including times of departure and arrival of the first and second frames at the client station, and a second feedback from the second and third devices including times of arrival of the first and second frames at the second device and the third device. The location determining module determines a location of the client station based on the times of arrival and departure of the first and second frames at the first access point, the first and second feedbacks, and the predetermined locations.

    Abstract translation: 第一接入点，包括接收机，发射机，反馈模块和位置确定模块。 接收机从客户端接收第一帧。 发射机向客户端发送第二帧。 第一和第二帧也由位于预定位置的第二和第三设备接收。 反馈模块从客户站接收包括在客户站处的第一和第二帧的出发和到达时间的第一反馈，以及来自第二和第三设备的第二反馈包括第一和第二帧到达的时间 第二设备和第三设备。 位置确定模块基于第一和第二帧在第一接入点，第一和第二反馈和预定位置的到达和离开时间来确定客户端站的位置。

    Methods and apparatus for transmission of data at different modulation and/or coding rates
    76.
    发明授权
    Methods and apparatus for transmission of data at different modulation and/or coding rates 有权
    用于以不同调制和/或编码速率传输数据的方法和装置

    公开(公告)号：US09461858B1

    公开(公告)日：2016-10-04

    申请号：US14195185

    申请日：2014-03-03

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Hui-Ling Lou ,  Yong Liu ,  Raja Banerjea

    IPC: H04N7/12 ,  H04J3/04 ,  H04L27/26

    CPC classification number: H04L27/2604 ,  H04L1/0041 ,  H04L1/0625 ,  H04L25/03866 ,  H04L27/2627

    Abstract: In a method implemented in a communication device configured to transmit PHY data units via a communication channel, first data and second data is received. The first data is modulated according to a first constellation having a first number of constellation points, and the second data is modulated according to a second constellation having a second number of constellation points higher than the first number of constellation points. The first data and the second data is parsed to a plurality of spatial streams such that a first subset of the spatial streams includes at least some of the modulated first data but none of the modulated second data, and a second subset of the spatial streams includes at least some of the modulated second data but none of the modulated first data. A single PHY data unit that includes the plurality of spatial streams is generated.

    Abstract translation: 在被配置为经由通信信道发送PHY数据单元的通信设备中实现的方法中，接收第一数据和第二数据。 根据具有第一数量的星座点的第一星座对第一数据进行调制，并且根据具有高于第一数量星座点的第二数量的星座点的第二星座对第二数据进行调制。 第一数据和第二数据被解析为多个空间流，使得空间流的第一子集包括调制的第一数据中的至少一些，但是调制的第二数据中的至少一个，空间流的第二子集包括 调制的第二数据中的至少一些，但是没有调制的第一数据。 生成包括多个空间流的单个PHY数据单元。

    Transparent implicit beamforming in a communication system
    78.
    发明授权
    Transparent implicit beamforming in a communication system 有权
    通信系统中的透明隐式波束成形

    公开(公告)号：US09425872B1

    公开(公告)日：2016-08-23

    申请号：US14954640

    申请日：2015-11-30

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Srinivasa H. Garlapati

    IPC: H04B7/24 ,  H04B1/38 ,  H04B7/04 ,  H04B7/06

    CPC classification number: H04B7/0421 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0617 ,  H04B17/11 ,  H04B17/12 ,  H04B17/18 ,  H04B17/19

    Abstract: A first communication device receives a non-sounding data unit from a second communication device that does not support beamforming training procedures. The first communication device develops an estimate of a reverse channel via which the non-sounding data unit traveled based on the non-sounding data unit. The first communication device develops a transmit beamforming matrix based on the estimate of the reverse channel, the transmit beamforming matrix for the first communication device to utilize when transmitting via a forward channel.

    Abstract translation: 第一通信设备从不支持波束成形训练程序的第二通信设备接收不发声数据单元。 第一通信设备产生基于非发声数据单元行进的非探测数据单元的反向信道的估计。 第一通信设备基于反向信道的估计来开发发射波束形成矩阵，第一通信设备的发射波束形成矩阵在经由前向信道发射时利用。

    Methods and apparatus for adaptively selecting a communications mode in high frequency systems
    79.
    发明授权
    Methods and apparatus for adaptively selecting a communications mode in high frequency systems 有权
    用于在高频系统中自适应选择通信模式的方法和装置

    公开(公告)号：US09420594B1

    公开(公告)日：2016-08-16

    申请号：US14550511

    申请日：2014-11-21

    Applicant: Marvell International Ltd.

    Inventor： Rohit U. Nabar ,  Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

    IPC: H04L27/28 ,  H04W72/08 ,  H04W88/06 ,  H04W24/10 ,  H04L27/26

    CPC classification number: H04W72/085 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0069 ,  H04L5/0085 ,  H04L25/0204 ,  H04L25/0228 ,  H04L27/0008 ,  H04L27/261 ,  H04W24/10 ,  H04W88/06

    Abstract: Methods and apparatus are provided for adaptively selecting a communications mode in high frequency systems. A first dual-mode device having capabilities of using two or more high frequency communications modes, such as OFDM and SC modulation, may transmit a signal to a second dual-mode device with the same capabilities. The second dual-mode device may compute a channel characteristic associated with a high frequency communications channel and select an optimal high frequency communications mode. The second dual-mode device may transmit information indicative of the channel characteristic or the selected communications mode to the first dual-mode device. The first dual-mode device may select and operate using the optimal high frequency communications mode based on the information received from the second dual-mode device. The first and second dual-mode devices may communicate using the selected high frequency communications mode.

    Abstract translation: 提供了用于在高频系统中自适应地选择通信模式的方法和装置。 具有使用诸如OFDM和SC调制之类的两个或多个高频通信模式的能力的第一双模设备可以将信号发送到具有相同能力的第二双模设备。 第二双模设备可以计算与高频通信信道相关联的信道特性并选择最佳高频通信模式。 第二双模设备可以向第一双模设备发送指示信道特性或所选通信模式的信息。 第一双模设备可以基于从第二双模设备接收的信息，使用最佳高频通信模式来选择和操作。 第一和第二双模式设备可以使用所选择的高频通信模式进行通信。

    PHY frame formats in a system with more than four space-time streams
    80.
    发明授权
    PHY frame formats in a system with more than four space-time streams 有权
    具有超过四个时空流的系统中的PHY帧格式

    公开(公告)号：US09247579B1

    公开(公告)日：2016-01-26

    申请号：US13888206

    申请日：2013-05-06

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa

    IPC: H04W72/04 ,  H04W84/12 ,  H04W72/12 ,  H04W28/02

    CPC classification number: H04L27/2602 ,  H04B7/0684 ,  H04L1/0625 ,  H04L1/0675 ,  H04L25/0204 ,  H04L25/0224 ,  H04W28/0263 ,  H04W72/04 ,  H04W72/1263 ,  H04W84/12

    Abstract: In generating a data unit for transmission via a communication channel, a preamble of the data unit is generated, including i) generating a set of training fields, and ii) mapping each training field in the set of training fields to a plurality of space-time streams. When the set of training fields consist of four training fields, each training field in the set of training fields is mapped to four space-time streams according to a first space-time stream mapping matrix. When the set of training fields consists of six training fields, each training field in the set of training fields is mapped to six space-time streams according to a second space-time stream mapping matrix, wherein the first space-time stream mapping matrix is not a submatrix of the second space-time stream mapping matrix. A data portion of the data unit is generated so that a receiver device can receive the data portion via a corresponding number of space-time streams using channel information derived from the set of training fields.

    Abstract translation: 在生成用于经由通信信道进行传输的数据单元时，生成数据单元的前同步码，包括i）生成一组训练场，以及ii）将训练场集合中的每个训练场映射到多个空间 - 时间流。 当训练场集合由四个训练场组成时，根据第一时空流映射矩阵将训练场集合中的每个训练场映射到四个时空流。 当该组训练场由六个训练场组成时，根据第二时空流映射矩阵将训练场集合中的每个训练场映射到六个时空流，其中第一时空流映射矩阵为 不是第二个空时流映射矩阵的子矩阵。 生成数据单元的数据部分，使得接收机设备可以使用从训练场集合导出的信道信息经由相应数量的空时流来接收数据部分。

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