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公开(公告)号：US10135572B2
公开(公告)日：2018-11-20
申请号：US14846280
申请日：2015-09-04
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar , Raja Banerjea
Abstract: In a method for generating a data unit conforming to a first communication protocol, a first field and a second field to be included in a preamble of the data unit are generated. The first field includes a first set of one or more information bits that indicate a duration of the data unit and is formatted such that the first field allows a receiver device that conforms to a second communication protocol to determine the duration of the data unit. The second field includes a second set of one or more information bits that indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol. The first field and the second field are modulated using a modulation scheme specified for a field corresponding to the first field and the second field, respectively, by the second communication protocol.
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公开(公告)号：US09948365B2
公开(公告)日：2018-04-17
申请号：US15682087
申请日：2017-08-21
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Rohit U. Nabar , Hongyuan Zhang , Sudhir Srinivasa , Xiayu Zheng
IPC: H04B7/02 , H04L1/02 , H04B7/0417 , H04B7/06
CPC classification number: H04B7/0417 , H04B7/0617 , H04B7/0619 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04B7/0634
Abstract: A first communication device determines that a second communication device is capable of using a transparent implicit beamforming technique to determine steering matrices for transmitting to the first communication device via a forward multiple input multiple output (MIMO) communication channel. In response to determining that the second communication device is capable of using the transparent implicit beamforming technique, the first communication device transmits at least a certain number of data units to the second communication device using a maximum number of spatial streams during a time period of a certain duration when the first communication device is otherwise using less than the maximum number of spatial streams to transmit other data units to the second communication device. Transmitting the certain number of data units using the maximum number of spatial streams permits the second communication device to use the transparent implicit beamforming technique to develop one or more steering matrices.
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公开(公告)号：US09749022B2
公开(公告)日：2017-08-29
申请号：US14302188
申请日：2014-06-11
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Peter Loc
IPC: H04W72/04 , H04B7/0413 , H04W24/00 , H04B7/0417 , H04B7/06 , H04B7/08 , H04L25/02 , H04L27/26 , H04W52/42 , H04W52/24 , H04W52/32
CPC classification number: H04B7/0413 , H04B7/0417 , H04B7/0632 , H04B7/0691 , H04B7/0817 , H04B7/0874 , H04L25/0204 , H04L25/0226 , H04L25/0228 , H04L27/2647 , H04W24/00 , H04W52/241 , H04W52/248 , H04W52/325 , H04W52/42
Abstract: In a system having a first communication device with a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a second communication device with a second plurality of RF chains coupled to a second plurality of antennas, the second communication device receives consecutive training packets that were transmitted by the first communication device, the consecutive training packets having been produced at the first communication device by a power level rule to the first plurality of RF chains. The second communication device determines respective channel measurements corresponding to the consecutive training packets based on the power level rule, and selects a transmit parameter based on the respective channel measurements, the transmit parameter to be used by the first communication device when transmitting to the second communication device. The second communication device transmits and indication of the selected transmit parameter to the first communication device.
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公开(公告)号：US20160173179A1
公开(公告)日：2016-06-16
申请号：US15048867
申请日：2016-02-19
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Hui-Ling Lou , Rohit U. Nabar , Yong Liu
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/0626 , H04B7/0634 , H04B7/0697 , H04L5/0048
Abstract: Systems, apparatuses, and techniques relating to wireless local area network devices are described. A described technique includes transmitting a sounding packet to wireless communication devices; receiving, in response to the sounding packet, feedback packets from the wireless communication devices, wherein the feedback packets collectively comprise beamforming feedback, the beamforming feedback being derived from received versions of the sounding packet; determining a steering matrix based on the beamforming feedback; and transmitting, within a frame, spatially steered data packets to the wireless communications devices. The spatially steered data packets can be based on the steering matrix and data streams intended respectively for the wireless communication devices. The spatially steered data packets can concurrently provide the data streams respectively within the frame to the wireless communication devices via different spatial wireless channels.
Abstract translation: 描述与无线局域网设备相关的系统，设备和技术。 所描述的技术包括：向无线通信设备发送探测分组; 响应于所述探测分组，从所述无线通信设备接收反馈分组，其中所述反馈分组共同地包括波束成形反馈，所述波束成形反馈从所述探测分组的接收版本导出; 基于所述波束成形反馈确定导向矩阵; 以及在帧内发送空间控制的数据分组到所述无线通信设备。 空间转向的数据分组可以基于分别用于无线通信设备的导向矩阵和数据流。 空间转向的数据分组可以通过不同的空间无线信道在帧内分别向无线通信设备提供数据流。
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公开(公告)号：US09313754B2
公开(公告)日：2016-04-12
申请号：US13751388
申请日：2013-01-28
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Songping Wu
CPC classification number: H04W56/001 , H04B1/7073 , H04B1/70735 , H04B2201/7073 , H04J13/0014 , H04J13/10 , H04L5/0016 , H04L27/2613 , H04L27/262 , H04L27/2656 , H04L27/2662 , H04W56/00
Abstract: A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.
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Patent Agency Ranking
公开(公告)号：US20140294111A1
公开(公告)日：2014-10-02
申请号：US14302188
申请日：2014-06-11
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Peter Loc
IPC: H04B7/04
CPC classification number: H04B7/0413 , H04B7/0417 , H04B7/0632 , H04B7/0691 , H04B7/0817 , H04B7/0874 , H04L25/0204 , H04L25/0226 , H04L25/0228 , H04L27/2647 , H04W24/00 , H04W52/241 , H04W52/248 , H04W52/325 , H04W52/42
Abstract: In a system having a first communication device with a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a second communication device with a second plurality of RF chains coupled to a second plurality of antennas, the second communication device receives consecutive training packets that were transmitted by the first communication device, the consecutive training packets having been produced at the first communication device by a power level rule to the first plurality of RF chains. The second communication device determines respective channel measurements corresponding to the consecutive training packets based on the power level rule, and selects a transmit parameter based on the respective channel measurements, the transmit parameter to be used by the first communication device when transmitting to the second communication device. The second communication device transmits and indication of the selected transmit parameter to the first communication device.
Abstract translation: 在具有第一通信设备的系统中，第一通信设备具有耦合到第一多个天线的第一多个射频（RF）链和具有耦合到第二多个天线的第二多个RF链的第二通信设备，第二通信 设备接收由第一通信设备发送的连续训练分组，已经通过功率电平规则在第一通信设备处产生的连续训练分组发送到第一多个RF链。 第二通信设备基于功率电平规则来确定对应于连续训练分组的各个信道测量，并且基于相应的信道测量来选择发送参数，第一通信设备在发送到第二通信时要使用的发送参数 设备。 第二通信设备向所述第一通信设备发送所选择的发送参数的指示。
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7.发明授权Power amplifier adjustment for transmit beamforming in multi-antenna wireless systems 有权用于多天线无线系统中发射波束成形的功率放大器调整公开(公告)号：US08693964B2
公开(公告)日：2014-04-08
申请号：US13769567
申请日：2013-02-18
Applicant: Marvell World Trade Ltd.
Inventor： Rohit U. Nabar , Hongyuan Zhang
CPC classification number: H04B7/0617 , H01Q3/40 , H03F3/245 , H03G3/3042 , H04B7/0408 , H04W16/28
Abstract: One or more beamsteering matrices are applied to one or more signals to be transmitted via multiple antennas. After the one or more beamsteering matrices are applied to the one or more signals, the plurality of signals is provided to a plurality of power amplifiers coupled to the multiple antennas. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and relative signal energies are determined based on the determined signal energies. Output power levels of the plurality of power amplifiers are adjusted based on the determined relative signal energies.
Abstract translation: 一个或多个波束导向矩阵被施加到要经由多个天线发送的一个或多个信号。 在将一个或多个波束引导矩阵应用于一个或多个信号之后，将多个信号提供给耦合到多个天线的多个功率放大器。 对于提供给多个功率放大器的多个信号确定信号能量，并且基于所确定的信号能量来确定相对信号能量。 基于确定的相对信号能量来调整多个功率放大器的输出功率电平。
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公开(公告)号：US20140003384A1
公开(公告)日：2014-01-02
申请号：US14015722
申请日：2013-08-30
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Hui-Ling Lou , Rohit U. Nabar , Yong Liu
IPC: H04L5/00
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/0626 , H04B7/0634 , H04B7/0697 , H04L5/0048
Abstract: Systems, apparatuses, and techniques relating to wireless local area network devices are described. A described technique includes transmitting a sounding packet to wireless communication devices; receiving, in response to the sounding packet, feedback packets from the wireless communication devices, wherein the feedback packets are indicative of beamforming matrices, the beamforming matrices being derived from received versions of the sounding packet; determining steering matrices based on the beamforming matrices; generating spatially steered data packets for the wireless communication devices based respectively on the steering matrices and data streams intended respectively for the wireless communication devices; and transmitting, within a frame, the spatially steered data packets to the wireless communications devices, wherein the spatially steered data packets concurrently provide the data streams respectively within the frame to the wireless communication devices via different spatial wireless channels.
Abstract translation: 描述与无线局域网设备相关的系统，设备和技术。 所描述的技术包括向无线通信设备发送探测分组; 响应于所述探测分组，从所述无线通信设备接收反馈分组，其中所述反馈分组指示波束形成矩阵，所述波束形成矩阵从所述探测分组的接收版本导出; 基于所述波束形成矩阵确定导向矩阵; 基于分别用于无线通信设备的导向矩阵和数据流，为无线通信设备生成空间转向的数据分组; 以及在帧内将所述空间转向的数据分组发送到所述无线通信设备，其中所述空间转向数据分组在所述帧内分别通过不同的空间无线信道向所述无线通信设备提供所述数据流。
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9.发明申请POWER AMPLIFIER ADJUSTMENT FOR TRANSMIT BEAMFORMING IN MULTI-ANTENNA WIRELESS SYSTEMS 有权用于多天线无线系统中发射波束的功率放大器调整公开(公告)号：US20130154881A1
公开(公告)日：2013-06-20
申请号：US13769567
申请日：2013-02-18
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Rohit U. Nabar , Hongyuan Zhang
IPC: H01Q3/40
CPC classification number: H04B7/0617 , H01Q3/40 , H03F3/245 , H03G3/3042 , H04B7/0408 , H04W16/28
Abstract: One or more beamsteering matrices are applied to one or more signals to be transmitted via multiple antennas. After the one or more beamsteering matrices are applied to the one or more signals, the plurality of signals is provided to a plurality of power amplifiers coupled to the multiple antennas. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and relative signal energies are determined based on the determined signal energies. Output power levels of the plurality of power amplifiers are adjusted based on the determined relative signal energies.
Abstract translation: 一个或多个波束导向矩阵被施加到要经由多个天线发送的一个或多个信号。 在将一个或多个波束引导矩阵应用于一个或多个信号之后，将多个信号提供给耦合到多个天线的多个功率放大器。 对于提供给多个功率放大器的多个信号确定信号能量，并且基于所确定的信号能量来确定相对信号能量。 基于确定的相对信号能量来调整多个功率放大器的输出功率电平。
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公开(公告)号：US20130136063A1
公开(公告)日：2013-05-30
申请号：US13751388
申请日：2013-01-28
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Songping Wu
IPC: H04W56/00
CPC classification number: H04W56/001 , H04B1/7073 , H04B1/70735 , H04B2201/7073 , H04J13/0014 , H04J13/10 , H04L5/0016 , H04L27/2613 , H04L27/262 , H04L27/2656 , H04L27/2662 , H04W56/00
Abstract: A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.
Abstract translation: 从通过无线网络发送的数据分组中提取数据的系统和方法包括：接收具有前同步码部分和有效载荷部分的数据分组。 前导码部分与第一已知扩展序列交叉相关，以产生第一定时信号，并且前同步码部分与第二已知扩展信号相互相关，以产生帧定时信号。 在第一定时信号中检测到脉冲，并且基于第一定时信号中检测到的脉冲设置第一定时参数。 在帧定时信号中检测到脉冲，并且基于帧定时信号中检测到的脉冲设置帧定时参数。 根据第一定时参数和帧定时参数从接收到的有效载荷部分提取数据。
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