公开(公告)号：US08913582B1

公开(公告)日：2014-12-16

申请号：US14104168

申请日：2013-12-12

Applicant: Marvell International Ltd.

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

IPC: H04W4/00 ,  H03C7/02 ,  H04B7/02 ,  H04L1/00 ,  H04W24/02 ,  H04B7/06

CPC classification number: H04L1/0003 ,  H04B7/0619 ,  H04W24/02 ,  H04W52/262

Abstract: A first wireless device including a receiver and a transmitter. The receiver includes a channel estimation module configured to receive, from a second wireless device over a communication channel, a training packet and estimate a quality of the communication channel based on the training packet, and a modulation and coding scheme (MCS) determination module configured to determine an MCS based on one or more of the training packet and the estimated quality of the communication channel. The transmitter is configured to transmit, to the second wireless device over the communication channel, an indication of the MCS determined by the MCS determination module.

Abstract translation: 包括接收机和发射机的第一无线设备。 所述接收机包括：信道估计模块，被配置为通过通信信道从第二无线设备接收训练分组，并且基于所述训练分组来估计所述通信信道的质量;以及配置的调制和编码方案（MCS）确定模块 以基于训练分组中的一个或多个以及通信信道的估计质量来确定MCS。 发送器被配置为通过通信信道向第二无线设备发送由MCS确定模块确定的MCS的指示。

公开(公告)号：US08903025B1

公开(公告)日：2014-12-02

申请号：US14058627

申请日：2013-10-21

Applicant: Marvell International Ltd.

Inventor： Manikandan Chandrasekar ,  Ping Gao ,  Lokesh Sundaramurthy Satrasala ,  Swaroop Venkatesh ,  Rohit U. Nabar

IPC: H04L27/06 ,  H04L27/26 ,  H04L1/00 ,  H04L25/03

CPC classification number: H04L25/03318 ,  H04L1/0054 ,  H04L25/03891 ,  H04L2025/03426

Abstract: Systems and methods for detecting data in a received multiple-input-multiple-output signal are provided. First, second, and third signals are received and form a vector y. The received signals are associated with first, second, and third data values that form a vector x. A channel matrix (H) is received, and a QR decomposition of the channel matrix is performed, such that H=QR. The vector y is transformed into a vector z according to z=QHy. A distance value between the rector z and the vector x is determined for each possible third data value. A nearest constellation point is calculated based on a first of the possible third data values. The calculating step is repeated for each of the possible third data values to generate a set of constellation point triplets. The distance values are determined using the set of constellation point triplets.

Abstract translation: 提供了用于检测接收的多输入多输出信号中的数据的系统和方法。 接收第一，第二和第三信号并形成向量y。 所接收的信号与形成向量x的第一，第二和第三数据值相关联。 接收信道矩阵（H），并且执行信道矩阵的QR分解，使得H = QR。 根据z = QHy，向量y被转换成向量z。 对于每个可能的第三数据值确定反射器z和向量x之间的距离值。 基于第一可能的第三数据值来计算最近的星座点。 针对每个可能的第三数据值重复计算步骤以生成一组星座点三元组​​。 使用星座点三元组​​的集合来确定距离值。

公开(公告)号：US08779978B1

公开(公告)日：2014-07-15

申请号：US13908720

申请日：2013-06-03

Applicant: Marvell International Ltd.

Inventor： Jongwon Lee ,  Rohit U. Nabar

IPC: H01Q3/00

CPC classification number: H01Q25/00 ,  H01Q1/246 ,  H01Q21/06 ,  H01Q21/293

Abstract: An apparatus for use in transmit beamforming to a beamformee having NR receive antennas. The apparatus includes a controller configured to i) construct a partial channel matrix that describes a multiple input, multiple output (MIMO) channel between a beamformer and M receive antennas, wherein M is less than NR, and ii) generate L independent vectors using the partial channel matrix, wherein L is a rank of the partial channel matrix. When a number NS of one or more streams is greater than L, the controller is further configured to i) select the L independent vectors as steering vectors to steer L streams of the plurality of streams, and ii) select NS−L orthogonal vectors in a null space of the L independent vectors as steering vectors to steer a remainder of the streams in the plurality of streams.

Abstract translation: 一种用于向具有NR个接收天线的波束形成器的发射波束成形中使用的装置。 该装置包括：控制器，被配置为i）构建描述波束形成器和M个接收天线之间的多输入多输出（MIMO）信道的部分信道矩阵，其中M小于NR，以及ii）使用 部分信道矩阵，其中L是部分信道矩阵的秩。 当一个或多个流的数目NS大于L时，控制器还被配置为：i）选择L个独立向量作为引导多个流的L个流的引导向量，以及ii）选择NS-L正交向量 L独立向量的零空间作为用于引导多个流中的其余流的导向向量。

公开(公告)号：US08774725B1

公开(公告)日：2014-07-08

申请号：US13724847

申请日：2012-12-21

Applicant: Marvell International Ltd.

Inventor： Rohit U. Nabar ,  Hui-Ling Lou

IPC: H04B1/00

CPC classification number: H04B7/0417 ,  H04B17/14

Abstract: A transmitter beamforming technique for use in a MIMO wireless communication system determines a calibration factor and then applies the calibration factor to a transmit beamforming steering matrix developed using implicit beamforming. The beamforming technique first determines descriptions of both the forward and reverse channels, determines an estimate of the forward channel from the description of the reverse channel, determines right singular matrixes which model the forward channel and the estimated forward channel and then develops a calibration factor from the determined right singular matrixes. The beamforming technique then applies the determined calibration factor to a steering matrix which is calculated using an implicit beamforming technique. The use of this beamforming technique provides superior beamforming results when using implicit beamforming without having to take the necessary steps to determine a description of the actual forward channel each time a new steering matrix is to be calculated.

Abstract translation: 用于MIMO无线通信系统的发射机波束形成技术确定校准因子，然后将校准因子应用于使用隐式波束形成开发的发射波束形成导引矩阵。 波束成形技术首先确定正向和反向信道两者的描述，从反向信道的描述确定前向信道的估计，确定对正向信道和估计的前向信道建模的右侧奇异矩阵，然后从 确定的右奇异矩阵。 波束形成技术然后将所确定的校准因子应用于使用隐式波束形成技术计算的导引矩阵。 当使用隐式波束成形时，使用这种波束成形技术提供优异的波束成形结果，而不必采取必要的步骤来确定每当计算新的导向矩阵时对实际正向信道的描述。

公开(公告)号：US20140072080A1

公开(公告)日：2014-03-13

申请号：US14077624

申请日：2013-11-12

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

IPC: H04L27/26

CPC classification number: H04L27/2649 ,  H04L1/0072 ,  H04L1/0079 ,  H04L5/0007 ,  H04L5/0092 ,  H04L25/0204 ,  H04L25/022 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2601 ,  H04L27/2602

Abstract: Systems and methods are provided for processing a payload portion of a received signal in a single carrier mode or a multiple carrier mode based on a portion of the received signal. A single carrier signaling portion is received at a first rate, and whether the payload portion of the signal is a single carrier signal or a multiple carrier signal is detected from the received single carrier signaling portion. The payload portion of the received signal is received at the first rate and demodulated in a single carrier mode if the detecting determines that the payload portion of the received signal is a single carrier signal, and the payload portion of the received signal is demodulated in a multiple carrier mode if the detecting determines that the payload portion of the received signal is a multiple carrier signal.

Abstract translation: 提供了系统和方法，用于基于接收信号的一部分，以单载波模式或多载波模式处理接收信号的有效载荷部分。 以第一速率接收单载波信令部分，以及信号的有效载荷部分是单载波信号还是从所接收的单载波信令部分检测多载波信号。 如果检测结果确定接收信号的有效载荷部分是单载波信号，则以第一速率接收接收信号的有效载荷部分并以单载波模式进行解调，并且接收信号的有效载荷部分被解调为 多载波模式，如果检测确定接收信号的有效载荷部分是多载波信号。

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

IPC: H04L29/06 ,  H04L27/26

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。

公开(公告)号：US20130272439A1

公开(公告)日：2013-10-17

申请号：US13890890

申请日：2013-05-09

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0639

Abstract: A method selects a codebook for transmit beamforming. The method constructs an estimated channel matrix based on a codebook, selects a channel submatrix from the estimated channel matrix, calculates a selection matrix from the channel submatrix; and assigns a steering matrix based on the selection matrix. The method may construct an estimated channel matrix, select a channel submatrix, and calculate a selection matrix for each of multiple codebooks, then select an optimal codebook. The steering matrix is assigned based on the optimal codebook. The steering matrix may be used in steering a transmitted packet. The method may also calculate a post-MIMO equalizer signal-to-noise ratio for a data stream, based on the estimated channel matrix and the selected codebook. A related system is also disclosed. Other embodiments are provided, and each of the embodiments described herein can be used alone or in combination with one another.

Abstract translation: 一种方法选择用于发送波束成形的码本。 该方法构建了基于码本的估计信道矩阵，从估计的信道矩阵中选择一个信道子矩阵，从该信道子矩阵中计算一个选择矩阵; 并根据选择矩阵分配导引矩阵。 该方法可以构建估计的信道矩阵，选择一个信道子矩阵，并计算多个码本中的每一个的选择矩阵，然后选择最佳的码本。 基于最佳码本分配指导矩阵。 导向矩阵可以用于控制传输的分组。 该方法还可以基于估计的信道矩阵和选择的码本计算数据流的后MIMO均衡器信噪比。 还公开了相关系统。 提供了其它实施例，并且本文所述的每个实施例可以单独使用或彼此组合使用。

公开(公告)号：US11265119B1

公开(公告)日：2022-03-01

申请号：US16546961

申请日：2019-08-21

Applicant: Marvell international Ltd.

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

IPC: H04J1/00 ,  H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04W84/12

Abstract: A system includes a stream parser, a multiplexer, and a plurality of transmission paths. The stream parser is configured to parse an input data stream for a packet into a plurality of spatial streams for transmission via a plurality of transmission paths over a plurality of wireless channels, respectively. The multiplexer is configured to multiplex data from the stream parser onto the plurality of transmission paths for each of the plurality of spatial streams. The plurality of transmission paths is configured to generate portions of the packet based on outputs of the multiplexer and to transmit the portions of the packet via the plurality of transmission paths over the plurality of wireless channels, respectively, using different carrier frequencies corresponding to different frequency bands for each of the portions of the packet.

公开(公告)号：US11006480B1

公开(公告)日：2021-05-11

申请号：US16525420

申请日：2019-07-29

Applicant: Marvell International Ltd.

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

IPC: H04W84/12 ,  H04L27/26 ,  H04J11/00 ,  H04K1/00

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.

公开(公告)号：US10419143B1

公开(公告)日：2019-09-17

申请号：US15940602

申请日：2018-03-29

Applicant: Marvell International Ltd.

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

IPC: H04J1/00

Abstract: The present disclosure includes systems and techniques relating to wireless local area network devices. Systems and techniques include multiplexing information for a single wireless communication device onto multiple radio pathways to produce a data packet, operating the multiple radio pathways to generate different portions of the data packet, and transmitting the data packet to the single wireless communication device by concurrent transmissions of the different portions of the data packet over different wireless channels.