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公开(公告)号：US09031145B1
公开(公告)日：2015-05-12
申请号：US14291473
申请日：2014-05-30
Applicant: Marvell International Ltd.
Inventor： Arul Durai Murugan Palanivelu , Leilei Song , Rohit U. Nabar , Jungwon Lee , Sayandev Mukherjee , Hui-Ling Lou
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。
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32.发明授权公开(公告)号：US09014320B1
公开(公告)日：2015-04-21
申请号：US14275287
申请日：2014-05-12
Applicant: Marvell International Ltd.
Inventor： Leilei Song , Rohit U. Nabar , Kedar Shirali
CPC classification number: H04B15/02 , H04B1/10 , H04B7/0413 , H04L1/0054 , H04L1/06 , H04L1/20
Abstract: Systems and methods are provided for whitening noise of a received signal vector in a multiple-input multiple-output (MIMO) transmission or storage system. The whitening filter may be designed to whiten an interference component of the received signal vector, where the interference component is derived from modeling transmitter and receiver imperfections as a first coupling between MIMO transmitter outputs and a second coupling between MIMO receiver. The whitening filter may be computed based on the covariance matrix of the interference component.
Abstract translation: 提供了用于在多输入多输出（MIMO）传输或存储系统中对接收信号向量的噪声进行白化的系统和方法。 白化滤波器可以被设计为对接收信号矢量的干扰分量进行白化，其中干扰分量是从模拟发射机和接收机缺陷得到的，作为MIMO发射机输出与MIMO接收机之间的第二耦合的第一耦合。 可以基于干涉分量的协方差矩阵来计算白化滤波器。
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公开(公告)号：US08976908B1
公开(公告)日：2015-03-10
申请号：US13920040
申请日：2013-06-17
Applicant: Marvell International Ltd.
Inventor： Rohit U. Nabar
IPC: H04L27/00
CPC classification number: H04L25/0236
Abstract: A system including a receiver to receive, over a wireless channel, a packet including a preamble portion that includes a plurality of training fields and a first signal field and a controller to generate a first estimate of the wireless channel based on one or more of the plurality of training fields, and decode the first signal field based on the first estimate. Subsequent to decoding the first signal field, the controller re-encodes the first signal field to generate a second signal field. The controller verifies whether the first signal field was properly decoded by comparing the second signal field to the first signal field prior to being decoded. In response to the first signal field being correctly decoded, the controller generates a second estimate of the wireless channel based on the first signal field as decoded. The second estimate is usable to refine the first estimate.
Abstract translation: 一种系统，包括接收机，用于通过无线信道接收包括包括多个训练场的前导码部分和第一信号字段的分组，以及控制器，用于基于所述无线信道中的一个或多个来生成所述无线信道的第一估计 多个训练场，并且基于第一估计对第一信号场进行解码。 在解码第一信号域之后，控制器对第一信号场进行重新编码以产生第二信号场。 控制器通过在解码之前将第二信号字段与第一信号字段进行比较来验证第一信号字段是否被正确解码。 响应于第一信号字段被正确解码，控制器基于被解码的第一信号字段产生无线信道的第二估计。 第二个估计可用于改进第一个估计。
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34.发明授权公开(公告)号：US08953720B1
公开(公告)日：2015-02-10
申请号：US13747059
申请日：2013-01-22
Applicant: Marvell International Ltd.
Inventor： Arul Durai Murugan Palanivelu , Sudhir Srinivasa , Hongyuan Zhang , Rohit U. Nabar
CPC classification number: H04L27/2613 , H04L25/022 , H04L25/0256 , H04L27/0012 , H04L27/2035 , H04L27/206 , H04L27/2656 , H04L27/2666 , H04L27/2672 , H04L27/2682
Abstract: In a method for detecting a packet type of an orthogonal frequency division multiplexing (OFDM) data unit detected in a communication channel, a first estimate and a second estimate of a transmitted symbol are determined for each of at least some of a plurality of OFDM tones in an OFDM symbol of the data unit. A first distance and a second distance are determined between a received symbol and, respectively, the first estimate and the second estimate scaled by a channel response estimate corresponding to the OFDM tone. A first total distance is determined based on a mathematical summation of the first distances over the plurality of OFDM tones. A second total distance is determined based on a mathematical summation of the second distances over the plurality of OFDM tones. The packet type is determined based at least on the first total distance and the second total distance.
Abstract translation: 在用于检测在通信信道中检测到的正交频分复用（OFDM）数据单元的分组类型的方法中，针对多个OFDM音调中的至少一些OFDM音调中的每一个确定发送符号的第一估计和第二估计 在数据单元的OFDM符号中。 第一距离和第二距离在接收到的符号和分别由与OFDM音调对应的信道响应估计量化的第一估计和第二估计之间确定。 基于多个OFDM音调上的第一距离的数学求和来确定第一总距离。 基于多个OFDM音调上的第二距离的数学求和来确定第二总距离。 至少基于第一总距离和第二总距离来确定分组类型。
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公开(公告)号：US08948150B1
公开(公告)日：2015-02-03
申请号：US14094687
申请日：2013-12-02
Applicant: Marvell International Ltd.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Hui-Ling Lou , Sudhir Srinivasa , Arul Durai Murugan Palanivelu
CPC classification number: H04W84/02 , H04J11/00 , H04L1/0643 , H04L27/2626
Abstract: In a method for transmitting information in a wireless local area network (WLAN), a plurality of different data streams corresponding to a plurality of different devices are orthogonally multiplexed onto a single symbol stream without using channel state information corresponding to a plurality of channels between a transmitting device and the plurality of different devices. One or more transmit streams are generated using the single symbol stream.
Abstract translation: 在用于在无线局域网（WLAN）中发送信息的方法中，对应于多个不同设备的多个不同数据流被正交地复用到单个符号流上，而不使用对应于多个信道之间的信道状态信息 发送装置和多个不同的装置。 使用单个符号流生成一个或多个发送流。
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Patent Agency Ranking
36.发明授权Bias current control for a radio frequency unit of a wireless network interface 有权无线网络接口射频单元的偏置电流控制公开(公告)号：US08934577B1
公开(公告)日：2015-01-13
申请号：US13681192
申请日：2012-11-19
Applicant: Marvell International Ltd.
Inventor： Swaroop Venkatesh , Atul Salhotra , Sergey Timofeev , Rohit U. Nabar
CPC classification number: H04L25/06 , H04L25/063 , H04L27/0008
Abstract: A bias current utilized in a unit of a radio frequency (RF) receiver device of a network interface is controlled. A modulation scheme utilized in a packet being received by the network interface is determined. It is determined, based on the determined modulation scheme, whether a level of the bias current should be changed. When it is determined that the level of the bias current should be changed, a control signal to change the level of the bias current is generated.
Abstract translation: 控制在网络接口的射频（RF）接收机设备的单元中使用的偏置电流。 确定由网络接口接收的分组中使用的调制方案。 基于确定的调制方案确定是否应该改变偏置电流的电平。 当确定应该改变偏置电流的电平时，产生改变偏置电流电平的控制信号。
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公开(公告)号：US08902961B1
公开(公告)日：2014-12-02
申请号：US13767414
申请日：2013-02-14
Applicant: Marvell International Ltd.
Inventor： Rohit U. Nabar , Hongyuan Zhang , Jungwon Lee
CPC classification number: H04B7/0456 , H04B7/0617 , H04B7/0619 , H04L1/0003 , H04L1/0009 , H04L25/0222 , H04L25/0228
Abstract: A method in a wireless communication system having a forward channel corresponding to transmissions from a first device to a second device, and a reverse channel corresponding to transmissions from the second device to the first device, includes initiating, at the first device, a first update of a steering matrix. The steering matrix is used to beamform transmissions on the forward channel. The method also includes monitoring, at the first device, a plurality of reverse channel estimates corresponding to the reverse channel, determining, at the first device, a metric indicative of a rate of change in the reverse channel based on the plurality of reverse channel estimates, and initiating, at the first device, a second update of the steering matrix based on a comparison between (i) the metric indicative of the rate of change in the reverse channel and (ii) a threshold.
Abstract translation: 一种具有对应于从第一设备到第二设备的传输的正向信道的无线通信系统中的方法以及对应于从第二设备到第一设备的传输的反向信道的方法包括在第一设备处启动第一更新 的导向矩阵。 导向矩阵用于在正向信道上波束传输。 该方法还包括在第一设备处监视对应于反向信道的多个反向信道估计，在第一设备处，基于多个反向信道估计来确定指示反向信道的变化率的度量 并且基于（i）指示反向信道中的变化率的度量和（ii）阈值之间的比较，在所述第一设备处发起所述导引矩阵的第二更新。
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公开(公告)号：US10411846B1
公开(公告)日：2019-09-10
申请号：US14981603
申请日：2015-12-28
Applicant: Marvell International Ltd.
Inventor： Hongyuan Zhang , Hui-Ling Lou , Rohit U. Nabar
Abstract: The present disclosure includes systems and techniques relating to wireless local area network devices. A described technique include accessing a data stream intended for transmission to a single wireless communication device; multiplexing the data stream to two or more radio pathways to produce a data packet; generating, via the two or more radio pathways, two or more different portions of the data packet based on an aggregated capacity of two or more wireless channels that are associated with the two or more radio pathways, the two or more radio pathways being respectively configured to use two or more groups of orthogonal frequency division multiplexing (OFDM) subcarriers to generate the two or more different portions of the data packet; 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 wireless channels.
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公开(公告)号：US09780857B1
公开(公告)日：2017-10-03
申请号：US15180235
申请日：2016-06-13
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Ying-Cheng Lee , Timothy J. Donovan , Dharmesh B. Bhagatwala , Ken Kinwah Ho , Hongyuan Zhang , Rohit U. Nabar , Tsunglun Yu
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, an apparatus comprises a beamforming architecture including a baseband unit and a processor. The beamforming architecture is configured to determine a steering matrix based on at least the baseband unit and the processor; and wherein the beamforming architecture is configured to simultaneously support a plurality of beamformee client devices, each beamformee client device beamformed by a beamformer with at least one of a beamformer hardware mode and a beamformer software mode and with at least one of a beamformer explicit mode and a beamformer implicit mode.
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公开(公告)号：US09706599B1
公开(公告)日：2017-07-11
申请号：US13689183
申请日：2012-11-29
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Hongyuan Zhang , Rohit U. Nabar , Sudhir Srinivasa , Raja Banerjea , Yong Liu
CPC classification number: H04W84/12 , H04J11/0026 , H04L27/2602 , H04L27/2613
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.
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