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公开(公告)号：US09178745B2
公开(公告)日：2015-11-03
申请号：US14044710
申请日：2013-10-02
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Raja Banerjea , Yong Liu , Sudhir Srinivasa , Hyukjoon Kwon
CPC classification number: H04L29/0653 , H04L1/004 , H04L1/0046 , H04L1/0065 , H04L1/08 , H04L5/0007 , H04L27/2602 , H04L27/2613 , H04L27/2617 , H04L27/2621 , H04L27/2626 , H04L27/2636
Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are encoded using a forward error correction (FEC) encoder. Also, the information bits are encoded according to a block coding scheme, where m copies of each bit are included in the information bits, and one or more bits in the m copies of each bit are flipped. The information bits are mapped to a plurality of constellation symbols, and a plurality of orthogonal frequency division multiplexing (OFDM) symbols are generated to include the plurality of constellation symbols. The PHY data unit is generated to include the plurality of OFDM symbols.
Abstract translation: 在通过通信信道生成用于发送的物理层（PHY）数据单元的方法中，使用前向纠错（FEC）编码器对要包括在PHY数据单元中的信息比特进行编码。 此外，信息比特根据块编码方案进行编码，其中每个比特的m个副本被包括在信息比特中，并且每个比特的m个副本中的一个或多个比特被翻转。 信息比特被映射到多个星座符号，并且生成多个正交频分复用（OFDM）符号以包括多个星座符号。 生成PHY数据单元以包括多个OFDM符号。
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公开(公告)号：US09154969B1
公开(公告)日：2015-10-06
申请号：US13626841
申请日：2012-09-25
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Sudhir Srinivasa , Xiayu Zheng , Hongyuan Zhang , Rohit U. Nabar , Riddhi Madani , Atul Salhotra , Erik Heinke , Brian Bosso
CPC classification number: H04W24/00 , H04B17/14 , H04L43/0852
Abstract: In a method of calibrating a wireless communication device, a first sounding packet is transmitted from the wireless communication device to a calibration station. A first channel descriptor is generated based on the first sounding packet. A second sounding packet is transmitted from the calibration station to the wireless communication device. A second channel descriptor is generated based on the second sounding packet. The first channel descriptor and the second channel descriptor are obtained at a controller. Calibration coefficients indicative of one or both of phase imbalance and amplitude imbalance between a receive radio frequency (RF) chain and a transmit RF chain at the wireless communication device are generated based on the first and the second channel descriptors. The calibration coefficients are sent from the controller to the wireless communication device.
Abstract translation: 在校准无线通信设备的方法中，第一探测分组从无线通信设备发送到校准站。 基于第一探测包生成第一信道描述符。 第二探测包从校准站发送到无线通信设备。 基于第二探测包生成第二信道描述符。 在控制器处获得第一信道描述符和第二信道描述符。 基于第一和第二信道描述符生成指示无线通信设备处的接收射频（RF）链和发射RF链之间的相位不平衡和幅度不平衡之一或两者的校准系数。 校准系数从控制器发送到无线通信设备。
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公开(公告)号：US09019991B1
公开(公告)日：2015-04-28
申请号：US13708298
申请日：2012-12-07
Applicant: Marvell International Ltd.
Inventor： Hongyuan Zhang , Sudhir Srinivasa , Sergey Timofeev
CPC classification number: H04L29/02 , H04L27/0012 , H04L27/261 , H04W52/325
Abstract: A method for transmitting a data packet includes prepending to the digital contents of the data packet a preamble including a first preamble field having a plurality of repetitions of a sequence. The method also includes determining according to a specified communication protocol a first transmission power level for the data packet and determining according to the specified communication protocol and the first preamble field an unadjusted transmission power level for the first preamble field. The method further includes determining the presence of one or more power-boost characteristics of the data packet or of an intended receiving client, transmitting the first preamble field at a first adjusted transmission power level if one or more power-boost characteristics are determined to be present, and transmitting a remainder of the data packet at the first transmission power level for the data packet.
Abstract translation: 用于发送数据分组的方法包括向数据分组的数字内容预先提供包括具有多个重复序列的第一前导字段的前导码。 该方法还包括根据指定的通信协议确定数据分组的第一发射功率电平，并根据指定的通信协议和第一前同步码字段确定第一前同步码字段的未调整的发射功率电平。 该方法还包括确定数据分组或预期接收客户端的一个或多个功率 - 升压特性的存在，如果确定一个或多个功率 - 增强特性被确定为以第一调整后的传输功率电平发送第一前导码字段 存在并且以数据分组的第一发送功率电平发送数据分组的剩余部分。
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公开(公告)号：US08995587B1
公开(公告)日：2015-03-31
申请号：US13893104
申请日：2013-05-13
Applicant: Marvell International Ltd.
Inventor： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar
CPC classification number: H04B7/043 , H04B7/0417 , H04L1/06
Abstract: A method for processing a preamble of a data unit transmitted via a communication channel includes receiving a signal via a plurality of antennas, applying a plurality of distinct steering vectors to the received signal to generate a plurality of respective outputs, and using the plurality of outputs to perform at least one of carrier sensing and symbol timing synchronization associated with the preamble.
Abstract translation: 一种用于处理通过通信信道发送的数据单元的前同步码的方法包括经由多个天线接收信号，向接收信号应用多个不同的导向矢量以产生多个相应的输出，并且使用多个输出 以执行与前导码相关联的载波侦听和符号定时同步中的至少一个。
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公开(公告)号：US20140029681A1
公开(公告)日：2014-01-30
申请号：US14044710
申请日：2013-10-02
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Raja Banerjea , Yong Liu , Sudhir Srinivasa , Hyukjoon Kwon
CPC classification number: H04L29/0653 , H04L1/004 , H04L1/0046 , H04L1/0065 , H04L1/08 , H04L5/0007 , H04L27/2602 , H04L27/2613 , H04L27/2617 , H04L27/2621 , H04L27/2626 , H04L27/2636
Abstract: In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are encoded using a forward error correction (FEC) encoder. Also, the information bits are encoded according to a block coding scheme, where m copies of each bit are included in the information bits, and one or more bits in the m copies of each bit are flipped. The information bits are mapped to a plurality of constellation symbols, and a plurality of orthogonal frequency division multiplexing (OFDM) symbols are generated to include the plurality of constellation symbols. The PHY data unit is generated to include the plurality of OFDM symbols.
Abstract translation: 在通过通信信道生成用于发送的物理层（PHY）数据单元的方法中，使用前向纠错（FEC）编码器对要包括在PHY数据单元中的信息比特进行编码。 此外，信息比特根据块编码方案进行编码，其中每个比特的m个副本被包括在信息比特中，并且每个比特的m个副本中的一个或多个比特被翻转。 信息比特被映射到多个星座符号，并且生成多个正交频分复用（OFDM）符号以包括多个星座符号。 生成PHY数据单元以包括多个OFDM符号。
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Patent Agency Ranking
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
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.
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公开(公告)号：US10368391B1
公开(公告)日：2019-07-30
申请号：US16120393
申请日：2018-09-03
Applicant: Marvell International Ltd.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Sudhir Srinivasa , Raja Banerjea , Yong Liu
Abstract: A communication device generates a physical layer (PHY) data unit that includes a PHY preamble and one or more PHY midambles. The communication generates the PHY preamble of the PHY data unit to include i) a signal field having a subfield that indicates that the PHY data unit includes one or more PHY midambles, ii) a short training field (STF) for automatic gain control (AGC) training and synchronization at a receiver, and iii) one or more long training fields (LTFs) for determining a channel estimate at the receiver. The communication generates a data payload of the PHY data unit having i) a set of orthogonal frequency division multiplexing (OFDM) symbols, and ii) one or more PHY midambles. Each of the one or more PHY midambles includes one or more LTFs for determining an updated channel estimate. The communication device transmits the PHY data unit via a wireless communication channel.
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公开(公告)号：US10320690B1
公开(公告)日：2019-06-11
申请号：US15353544
申请日：2016-11-16
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Sagar A. Tamhane , Hongyuan Zhang , Sudhir Srinivasa , Hui-Ling Lou
IPC: H04L12/841 , H04L12/26 , H04L29/08 , H04W84/12
Abstract: A first communication device generates a physical layer (PHY) protocol data unit having a beginning portion and an ending portion, where the beginning portion includes a PHY protocol header having a PHY protocol preamble, and the ending portion includes a reference signal. The PHY protocol data unit prompts a second communication device to record a first time corresponding to reception of the reference signal by the second communication device. The first communication device transmits the PHY protocol data unit, records a second time corresponding to transmission of the reference signal by the first communication device. The first communication device calculates a time of flight of the PHY protocol data unit using the second time, and/or transmits the second time to the second communication device, a third communication device, or both, to facilitate calculation of the time of flight of the PHY protocol data unit using the second time.
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公开(公告)号：US10218542B1
公开(公告)日：2019-02-26
申请号：US15783893
申请日：2017-10-13
Applicant: Marvell International Ltd.
Inventor： Parag Suresh Khairnar , Vijay Ahirwar , Sudhir Srinivasa , Hongyuan Zhang
Abstract: Systems, devices, and techniques relating to multi-symbol channel estimation are described. A described technique includes receiving a signal comprising first and second training symbols, and one or more data symbols; determining first and second channel estimates for subcarriers respectively based on the first and second training symbols; determining a dynamic timing advance estimate based on the first training symbol to adjust a sampling time for a remaining portion of the signal; determining one or more phase differences between the first and second training symbols for the subcarriers respectively based on angular versions of the first and second channel estimates; rotating the first channel estimates based on the dynamic timing advance estimate and the one or more phase differences; producing combined channel estimates based on the second channel estimates and the rotated first channel estimates; and processing the one or more data symbols based on the combined channel estimates.
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公开(公告)号：US09888496B1
公开(公告)日：2018-02-06
申请号：US14821202
申请日：2015-08-07
Applicant: Marvell International Ltd.
Inventor： Xiayu Zheng , Hongyuan Zhang , Ping Gao , Sudhir Srinivasa , Sergey Timofeev
CPC classification number: H04W74/0808 , H04L27/2601 , H04L27/2657 , H04L27/2663 , H04L27/2666 , H04L27/2675
Abstract: In accordance with embodiments of the present disclosure there is provided a method for carrier sensing. The method includes receiving, at a wireless receiver, an input signal, and generating, based on a sampling period, a plurality of data samples from the input signal. The method further includes periodically combining a first data sample from the plurality of data samples with a second data sample that is one or more sampling periods before the first data sample to generate a combined data sample. The method further includes generating an auto-correlated output for carrier sensing based on the combined data sample. The auto-correlated output is provided to generate an estimate of phase difference between the first sample and the second sample for the periodic combining.
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