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    Long wireless local area network (WLAN) packets with midambles
    62.
    发明授权
    Long wireless local area network (WLAN) packets with midambles 有权
    长时间的无线局域网（WLAN）数据包

    公开(公告)号：US09596715B1

    公开(公告)日：2017-03-14

    申请号：US13689223

    申请日：2012-11-29

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Raja Banerjea ,  Yong Liu

    IPC: H04L27/00 ,  H04W84/12 ,  H04L27/26 ,  H04L1/06 ,  H04L25/03 ,  H04L5/00 ,  H04B1/12 ,  H04N5/44 ,  H04B3/32 ,  H04B1/10

    CPC classification number: H04W84/12 ,  H04B1/1027 ,  H04B1/123 ,  H04B3/32 ,  H04L1/0618 ,  H04L5/0007 ,  H04L25/03057 ,  H04L25/03343 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2647 ,  H04N5/4401

    Abstract: A preamble, first and second portions of a data payload of a single data unit, and a midamble included between the first and second portions are generated. The midamble includes calibration information, and is based on a maximum number of space-time streams of a communication channel. A network interface of a communication device generates the preamble, the first and second portions of the data payload, and the midamble. A preamble, first and second portions of a data payload of a single data unit, and a midamble are received. The midamble includes calibration information, and is based on a maximum number of space-time streams. A first and/or a second characteristic is updated based on the midamble. A network interface of a communication device receives the preamble, the first and second portions of the data payload, and the midamble; and updates the first or the second characteristic based on the midamble.

    Abstract translation: 产生单个数据单元的数据有效载荷的前导码，第一和第二部分以及包括在第一和第二部分之间的中间码。 中间码包括校准信息，并且基于通信信道的最大数量的时空流。 通信设备的网络接口产生前导码，数据有效载荷的第一和第二部分以及中间码。 接收单个数据单元的数据有效载荷的前导码，第一和第二部分以及中间码。 中间码包括校准信息，并且基于最大数量的时空流。 基于中间码来更新第一和/或第二特性。 通信设备的网络接口接收前导码，数据有效载荷的第一和第二部分以及中间码; 并基于midamble更新第一或第二特征。

    Beamsteering in a spatial division multiple access (SDMA) system
    63.
    发明授权
    Beamsteering in a spatial division multiple access (SDMA) system 有权
    在空分多址（SDMA）系统中的波束导向

    公开(公告)号：US09319122B1

    公开(公告)日：2016-04-19

    申请号：US14188363

    申请日：2014-02-24

    Applicant: MARVELL INTERNATIONAL LTD.

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

    IPC: H04B1/00 ,  H04B7/06 ,  H04B7/04 ,  H04W84/12

    CPC classification number: H04B7/0613 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04W84/12

    Abstract: In a communication network, a first communication device obtains respective channel estimate matrices of respective communication channels between i) the first communication device and ii) respective second communication devices. The first communication device generates respective steering matrices for use in communicating with the respective second communication devices, including generating each steering matrix to project to a null-space of a space spanned by channel estimate matrices corresponding to others of the second communication devices. The first communication device utilizes the respective steering matrices to simultaneously transmit respective signals to the respective second communication devices.

    Abstract translation: 在通信网络中，第一通信设备在i）第一通信设备和ii）相应的第二通信设备之间获得各个通信信道的各个信道估计矩阵。 第一通信设备生成用于与各个第二通信设备进行通信的各个导引矩阵，包括生成每个导向矩阵以投影到与第二通信设备中的其他设备相对应的信道估计矩阵所跨越的空间的空间空间。 第一通信设备利用相应的导向矩阵同时将相应的信号发送到相应的第二通信设备。

    Parallel encoder for low-density parity-check (LDPC) codes
    65.
    发明授权
    Parallel encoder for low-density parity-check (LDPC) codes 有权
    用于低密度奇偶校验（LDPC）码的并行编码器

    公开(公告)号：US08812930B1

    公开(公告)日：2014-08-19

    申请号：US14028256

    申请日：2013-09-16

    Applicant: Marvell International Ltd.

    Inventor： Kedar Shirali ,  Rohit U. Nabar ,  Vikas Gulati ,  Sudhir Srinivasa

    IPC: H03M13/00

    CPC classification number: H03M13/6561 ,  H03M13/116 ,  H03M13/1185 ,  H03M13/2906 ,  H03M13/611 ,  H03M13/6527

    Abstract: A low-density parity check (LDPC) encoder that calculate parity check values for a message using an LDPC parity check matrix is provided. A matrix-vector multiplication unit is operative to multiply a portion of the LDPC parity check matrix and the message to obtain an intermediate vector. A parallel recursion unit is operative to recursively calculate a first plurality of parity check values for the message based on the intermediate vector and to recursively calculate a second plurality of parity check values for the message based on the intermediate vector. The first plurality of parity check values are calculated in parallel with the second plurality of parity check values.

    Abstract translation: 提供了使用LDPC奇偶校验矩阵计算消息的奇偶校验值的低密度奇偶校验（LDPC）编码器。 矩阵向量乘法单元用于将LDPC奇偶校验矩阵和消息的一部分相乘以获得中间向量。 并行递归单元用于基于中间向量递归地计算消息的第一多个奇偶校验值，并且基于中间向量递归地计算消息的第二多个奇偶校验值。 与第二多个奇偶校验值并行计算第一多个奇偶校验值。

    Implicit MIMO antenna selection
    66.
    发明授权
    Implicit MIMO antenna selection 有权
    隐性MIMO天线选择

    公开(公告)号：US08774304B1

    公开(公告)日：2014-07-08

    申请号：US13867514

    申请日：2013-04-22

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar

    IPC: H04B7/02

    CPC classification number: H04B7/061 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0691

    Abstract: A method in a first communication device configured to transmit data units to a second communication device via a forward link, and receive data units from the second communication device via a reverse link, includes transmitting, from the first communication device, consecutive sounding data units via the forward link. Each consecutive sounding data unit is transmitted via a different subset of antennas. The method also includes receiving, at the first communication device, CSI corresponding to the forward link that was generated at the second communication device and based on the consecutive sounding data units transmitted to the second communication device. The method also includes determining, at the first communication device, a subset of antennas to use in receiving data units via the reverse link. The subset of antennas to use in receiving data units via the reverse link is determined based on the CSI corresponding to the forward link.

    Abstract translation: 第一通信设备中的方法，被配置为经由前向链路向第二通信设备发送数据单元，以及经由反向链路从第二通信设备接收数据单元，包括：从第一通信设备经由 前向链接。 每个连续的探测数据单元经由不同的天线子集发送。 该方法还包括在第一通信设备处接收与在第二通信设备处生成的前向链路相对应的CSI，并且基于发送到第二通信设备的连续的探测数据单元。 该方法还包括在第一通信设备处确定用于经由反向链路接收数据单元的天线子集。 基于与前向链路对应的CSI来确定用于经由反向链路接收数据单元的天线子集。

    System and method of selecting a data detection technique for a MIMO system
    67.
    发明授权
    System and method of selecting a data detection technique for a MIMO system 有权
    选择MIMO系统的数据检测技术的系统和方法

    公开(公告)号：US08705600B1

    公开(公告)日：2014-04-22

    申请号：US13854937

    申请日：2013-04-01

    Applicant: Marvell International Ltd.

    Inventor： Leilei Song ,  Rohit U. Nabar ,  Hui-Ling Lou ,  Kedar Shirali

    IPC: H04B3/46

    CPC classification number: H04L27/0008 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0036 ,  H04L27/22 ,  H04L27/38

    Abstract: One or more communications parameters associated with a multiple input, multiple output (MIMO) signal transmitted by a transmitter are identified. The one or more communications parameters include one or more of (i) a number of receive antennas via which the MIMO signal is received, (ii) a number of spatial streams in the MIMO signal, and (iii) a signal to noise ratio (SNR) corresponding to the MIMO signal. A particular data detection technique of a plurality of data detection techniques employed by a receiver is selected in accordance with at least one of the one or more communications parameters.

    Abstract translation: 识别与由发射机发射的多输入多输出（MIMO）信号相关联的一个或多个通信参数。 所述一个或多个通信参数包括以下中的一个或多个：（i）接收MIMO信号的多个接收天线，（ii）MIMO信号中的多个空间流，以及（iii）信噪比（ SNR）。 根据一个或多个通信参数中的至少一个来选择由接收机采用的多个数据检测技术的特定数据检测技术。

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