公开(公告)号：US10070482B1

公开(公告)日：2018-09-04

申请号：US15645335

申请日：2017-07-10

Applicant: Marvell International Ltd.

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

IPC: H04L12/28 ,  H04W84/12 ,  H04L27/26

Abstract: A preamble, a first portion of a data payload, a midamble, and a second portion of the data payload of a single data unit are generated. The midamble is to be transmitted subsequent to transmission of the first portion of the data payload and prior to transmission of the second portion of the data payload. The midamble includes an indication of at least one characteristic of the data payload such as an indication of a size of the second portion of the data payload, or whether or not the data payload includes one or more other portions in addition to the first and second portions. A network interface of a communication device is configured to generate the preamble, the first and second portions of the data payload, and the midamble.

公开(公告)号：US09941988B1

公开(公告)日：2018-04-10

申请号：US14325254

申请日：2014-07-07

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar

IPC: H04J1/00

CPC classification number: H04J1/00 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0064 ,  H04L27/2602

Abstract: Systems and techniques relating to wireless devices are described. A described system includes a first radio unit configured to receive communication signals that include one or more signals indicative of a first physical layer frame of a data packet, and produce a first output based on the first physical layer frame; a second radio unit configured to receive communication signals that include one or more signals indicative of a second physical layer frame of the data packet, and produce a second output based on the second physical layer frame, the one or more signals indicative of the first physical layer frame are concurrently received with the one or more signals indicative of the second physical layer frame; a deparser configured to combine outputs, including the first and second outputs, to produce a combined output; and a controller configured to resolve the data packet based on the combined output.

公开(公告)号：US09712215B1

公开(公告)日：2017-07-18

申请号：US13730367

申请日：2012-12-28

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC: H04B7/04 ,  H04B7/0408 ,  H04B1/00

CPC classification number: H04B7/0408 ,  H04B1/00 ,  H04B7/0417 ,  H04B7/0465 ,  H04B7/0473 ,  H04B7/0663 ,  H04L5/0023 ,  H04L25/0204 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A system and method of beamforming may reduce feedback requirements. In some implementations, a beamforming technique may employ a diagonal matrix as a beamforming matrix. In some antenna phase beamforming strategies, a diagonal beamforming matrix in which the diagonal elements have a constant magnitude may be employed. Accordingly, a beamforming system may be utilized with few feedback information bits being transmitted from the beamformee; such a system may also minimize or eliminate power fluctuations among multiple transmit antennae.

公开(公告)号：US09413574B1

公开(公告)日：2016-08-09

申请号：US13955330

申请日：2013-07-31

Applicant: Marvell International Ltd.

Inventor： Sergey Timofeev ,  Swaroop Venkatesh ,  Atul Salhotra ,  Rohit U. Nabar

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04L27/01

CPC classification number: H04L27/01 ,  H04B1/0007 ,  H04B1/30 ,  H04L25/061 ,  H04L27/2647 ,  H04L27/2657

Abstract: Systems and methods for removing DC offset from a signal are provided. A radio frequency signal is received at a receiver. The radio frequency signal is converted into a digital signal including a periodic component with a period. A carrier frequency offset is removed from the digital signal to generate a frequency-shifted digital signal. The frequency-shifted digital signal is filtered to remove a DC offset in the digital signal. The filtering includes applying a moving average filter matched to the period to remove the periodic component from the frequency-shifted digital signal. The moving average filter generates a set of average values based on the frequency-shifted digital signal. The filtering also includes taking a difference between consecutive values of the set of average values to determine the DC offset, where the DC offset is introduced at the receiver.

Abstract translation: 提供了从信号中去除DC偏移的系统和方法。 在接收机处接收射频信号。 射频信号被转换为包括具有周期的周期分量的数字信号。 从数字信号中移除载波频率偏移以产生频移数字信号。 对频移数字信号进行滤波以去除数字信号中的直流偏移。 滤波包括应用与该周期匹配的移动平均滤波器以从频移数字信号中去除周期性分量。 移动平均滤波器基于频移数字信号产生一组平均值。 滤波还包括取平均值集合的连续值之间的差值来确定DC偏移，其中在接收器处引入DC偏移。

公开(公告)号：US09369192B1

公开(公告)日：2016-06-14

申请号：US14524272

申请日：2014-10-27

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Ying-Cheng Lee ,  Timothy J. Donovan ,  Dharmesh C. Bhagatwala ,  Ken Kinwah Ho ,  Hongyuan Zhang ,  Rohit U. Nabar ,  Tsunglun Yu

IPC: H04W84/04 ,  H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0617 ,  H04B7/046 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0689 ,  H04B7/0871

Abstract: Systems, methods, and other embodiments associated with a hybrid beamforming architecture are described. According to one embodiment, a first wireless device includes a transmitter and a baseband beamforming processing unit. The baseband beamforming processing unit includes a steering matrix calculation unit and a steering matrix cache. The steering matrix calculation unit is configured to derive a steering matrix from channel related information in a first packet received from a second wireless device. The steering matrix includes weights. The steering matrix cache is configured to (i) store the steering matrix derived from the channel related information, and (ii) provide the weights from the steering matrix to the transmitter. The transmitter is configured to, based on the weights from the steering matrix, perform transmit beamforming on a second packet being transmitted to the second wireless device from the first wireless device.

Abstract translation: 描述了与混合波束形成架构相关联的系统，方法和其他实施例。 根据一个实施例，第一无线设备包括发射机和基带波束成形处理单元。 基带波束形成处理单元包括导向矩阵计算单元和导向矩阵高速缓存。 导引矩阵计算单元被配置为从从第二无线设备接收的第一分组中的信道相关信息中导出导引矩阵。 导向矩阵包括重量。 导引矩阵高速缓存被配置为（i）存储从信道相关信息导出的导引矩阵，以及（ii）从导引矩阵向发射机提供权重。 发射机被配置为基于来自导引矩阵的权重，在从第一无线设备发送到第二无线设备的第二分组上执行发射波束成形。

公开(公告)号：US09326216B1

公开(公告)日：2016-04-26

申请号：US13918015

申请日：2013-06-14

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC: H04W40/00 ,  H04L12/701

CPC classification number: H04W40/00 ,  H04L45/00 ,  H04W8/26 ,  H04W99/00

Abstract: Methods and apparatus for processing frames in wireless networks is disclosed. In one implementation, the apparatus includes an antenna configured to (i) receive a first data frame, wherein the first data frame includes a field that identifies a parameter associated with a second data frame, and (ii) subsequent to receiving the first data frame, receive the second data frame. In one implementation, the apparatus further includes a processing module configured to (i) process the first data frame to identify the parameter associated with the second data frame, and (ii) based on identifying the parameter associated with the second data frame, process the second data frame.

Abstract translation: 公开了在无线网络中处理帧的方法和装置。 在一个实现中，该装置包括配置成（i）接收第一数据帧的天线，其中第一数据帧包括标识与第二数据帧相关联的参数的字段，以及（ii）在接收到第一数据帧之后 ，接收第二个数据帧。 在一个实现中，该设备还包括处理模块，其被配置为（i）处理第一数据帧以识别与第二数据帧相关联的参数，以及（ii）基于识别与第二数据帧相关联的参数，处理 第二个数据帧。

公开(公告)号：US09300371B1

公开(公告)日：2016-03-29

申请号：US14164734

申请日：2014-01-27

Applicant: Marvell International LTD.

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

IPC: H04B7/04 ,  H04L27/26 ,  H04L25/03

CPC classification number: H04B7/0408 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0617 ,  H04K1/10 ,  H04K3/224 ,  H04K2203/32 ,  H04L1/0003 ,  H04L1/0015 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0091 ,  H04L25/03343 ,  H04L27/0008 ,  H04L27/2601 ,  H04L27/2626 ,  H04L27/2636 ,  H04L27/2646

Abstract: A first network device including a receiver, a steering module, and a transmitter. The receiver is configured to receive a first signal from a second network device. The first signal is transmitted from the second network device using a first modulation system. The steering module is configured to generate a steering matrix based on the first signal. The transmitter is configured to transmit a second signal using the steering matrix to the second network device. The second signal is transmitted using a second modulation system. The first and second modulation schemes are selected from a group consisting of (i) a plurality of single carrier based modulation schemes and (ii) a plurality of orthogonal frequency division multiplexing based modulation schemes. The second modulation system is different from the first modulation system.

Abstract translation: 包括接收机，转向模块和发射机的第一网络设备。 接收器被配置为从第二网络设备接收第一信号。 使用第一调制系统从第二网络设备发送第一信号。 转向模块被配置为基于第一信号生成导向矩阵。 发射器被配置为使用导向矩阵向第二网络设备发送第二信号。 使用第二调制系统发送第二信号。 第一和第二调制方案从由（i）多个基于单载波的调制方案和（ii）多个基于正交频分复用的调制方案组成的组中选择。 第二调制系统与第一调制系统不同。

公开(公告)号：US09226270B1

公开(公告)日：2015-12-29

申请号：US13948994

申请日：2013-07-23

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar

IPC: H04J11/00 ,  H04W72/04 ,  H04W84/12

CPC classification number: H04W72/04 ,  H04L1/004 ,  H04L1/0071 ,  H04L1/02 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0064 ,  H04L27/2602 ,  H04W84/12

Abstract: The present disclosure includes systems and techniques relating to wireless local area network devices. Systems and techniques include accessing a data stream intended for transmission to a single wireless communication device, multiplexing the data stream onto two or more radio pathways to produce a data packet, operating the two or more radio pathways to respectively use two or more groups of orthogonal frequency division multiplexing (OFDM) subcarriers to generate two or more different portions of the data packet, the two or more groups of OFDM subcarriers being respectively assigned to two or more frequency bands, and transmitting the data packet to the single wireless communication device by concurrent transmissions of the two or more different portions via the two or more frequency bands.

Abstract translation: 本公开包括与无线局域网设备有关的系统和技术。 系统和技术包括访问旨在传输到单个无线通信设备的数据流，将数据流复用到两个或更多个无线电路径上以产生数据分组，操作两个或更多个无线电路径以分别使用两组或更多组正交 频分复用（OFDM）副载波以产生数据分组的两个或多个不同部分，两个或多个OFDM子载波组分别分配给两个或更多个频带，并且通过并发将数据分组发送到单个无线通信设备 经由两个或更多个频带的两个或多个不同部分的传输。

公开(公告)号：US08774301B1

公开(公告)日：2014-07-08

申请号：US13672141

申请日：2012-11-08

Applicant: Marvell International Ltd.

Inventor： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

IPC: H04L23/02

CPC classification number: H04B7/0413 ,  H04L25/03242 ,  H04L25/03961 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342

Abstract: Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.

Abstract translation: 用于检测多输入/多输出信号中的数据的系统和方法。 该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。 计算接收到的第二信号与每个可能的第二数据值之间的距离值。 计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。 使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。 基于确定的距离值来确定对数似然比。

公开(公告)号：US10530457B1

公开(公告)日：2020-01-07

申请号：US15131536

申请日：2016-04-18

Applicant: MARVELL INTERNATIONAL LTD.

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

IPC: H04B7/08 ,  H04B7/06

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.