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

IPC: H04L25/49 ,  H04L29/06 ,  H04L27/26 ,  H04L1/00 ,  H04L1/08

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：US09178586B2

公开(公告)日：2015-11-03

申请号：US13953355

申请日：2013-07-29

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Peter Loc

IPC: H04L27/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L25/02 ,  H04L27/26 ,  H04W52/42

CPC classification number: H04B7/0426 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0447 ,  H04B7/0632 ,  H04B7/0691 ,  H04B7/0817 ,  H04B7/0874 ,  H04L25/0202 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2647 ,  H04W52/42

Abstract: A method of antenna selection, in a MIMO system in which a transmitter having a first plurality of RF chains communicates with a receiver having a second plurality of RF chains, includes transmitting consecutive sounding packets produced by the first plurality of RF chains. The consecutive sounding packets each include a training symbol, and collectively sound a full-size channel for the MIMO system. The method also includes receiving channel state information for each of a plurality of scaled sub-channel estimates determined at the receiver. The channel state information includes at least one of respective gain factors that were applied to the consecutive sounding packets received at the receiver and respective scaling factors that were applied to sub-channel estimates determined at the receiver. The method also includes adjusting power levels applied to the first plurality of RF chains in response to receiving the channel state information.

Abstract translation: 一种在MIMO系统中的天线选择方法，其中具有第一多个RF链的发射机与具有第二多个RF链的接收机通信包括发射由第一多个RF链产生的连续的探测分组。 连续的探测分组各自包括训练符号，并且共同地为MIMO系统发出全尺寸信道。 该方法还包括为在接收机处确定的多个缩放的子信道估计中的每一个接收信道状态信息。 信道状态信息包括应用于在接收机处接收到的连续探测分组的各个增益因子中的至少一个以及应用于在接收机处确定的子信道估计的各个缩放因子。 该方法还包括响应于接收到信道状态信息来调整应用于第一多个RF链的功率电平。

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

IPC: G06F11/00 ,  H04J1/16 ,  H04L1/00 ,  H04L12/26 ,  H04W24/00

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。

公开(公告)号：US09100074B1

公开(公告)日：2015-08-04

申请号：US14171773

申请日：2014-02-03

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Hui-Ling Lou ,  Yong Liu ,  Songping Wu

IPC: H04B7/00 ,  H04B7/06

CPC classification number: H04B7/0617 ,  H04B7/0626 ,  H04B7/0634

Abstract: A first communication device receives a plurality of training signals associated with a transmit beamforming training portion of a current iteration of a beamforming procedure between the first communication device and a second communication device. A receive antenna weight vector (AWV) is applied to an antenna array as each of the plurality of training signals is received. A channel estimate is determined based on reception of the plurality of training signals, and feedback is determined based on the channel estimate. The feedback is transmitted to the second communication device as part of the current iteration of the beamforming procedure.

Abstract translation: 第一通信设备接收与第一通信设备和第二通信设备之间的波束形成过程的当前迭代的发射波束形成训练部分相关联的多个训练信号。 接收天线权重向量（AWV）被施加到天线阵列，因为接收到多个训练信号中的每一个。 基于多个训练信号的接收来确定信道估计，并且基于信道估计来确定反馈。 作为波束形成过程的当前迭代的一部分，反馈被传送到第二通信设备。

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

IPC: H04J3/24 ,  H04W4/00 ,  H04B7/02 ,  H04L27/00 ,  H04L29/02

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。

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

IPC: H03D1/00 ,  H04L27/06 ,  H04B7/04

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。

公开(公告)号：US08971457B1

公开(公告)日：2015-03-03

申请号：US13647523

申请日：2012-10-09

Applicant: Marvell International Ltd.

Inventor： Rohit U. Nabar ,  Hongyuan Zhang

IPC: H04L27/06

CPC classification number: H04L25/061 ,  H04L25/03993 ,  H04L25/062 ,  H04L25/067 ,  H04L27/2657 ,  H04L27/2689

Abstract: Systems and methods for removing a DC offset from an orthogonal frequency division multiplexed (OFDM) signal transmitted over a plurality of subcarrier frequencies. The system includes a receiver. The system further includes a high pass DC component filter configured to reduce a DC component of the orthogonal frequency division multiplexed signal, the high pass DC component filter shaping noise in the orthogonal frequency division multiplexed signal which results in a non-uniform power spectral density of the noise across the plurality of subcarrier frequencies. The system further includes a noise whitener configured to compensate for the noise shaping by the high pass DC component filter by normalizing the non-uniform power spectral density of the noise across the plurality of subcarrier frequencies.

Abstract translation: 用于从通过多个子载波频率发送的正交频分复用（OFDM）信号中去除DC偏移的系统和方法。 该系统包括一个接收器。 该系统还包括高通DC分量滤波器，其被配置为减少正交频分复用信号的DC分量，正交频分复用信号中的高通DC分量滤波器整形噪声，其导致不均匀的功率谱密度 跨多个子载波频率的噪声。 该系统还包括噪声增益器，其被配置为通过对跨多个子载波频率的噪声的非均匀功率谱密度进行归一化来补偿高通DC分量滤波器的噪声整形。

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：US08687673B1

公开(公告)日：2014-04-01

申请号：US13758740

申请日：2013-02-04

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Zhiyu Yang

IPC: H04B1/00 ,  H04L27/06

CPC classification number: H04B1/7073 ,  H04B7/0865

Abstract: A correlation magnitude signal is divided into a plurality of samples at a sequence of intervals over a symbol time, where the correlation signal corresponds to a magnitude of a correlation of a signal received at a receiver device with a known sequence. A sample with a highest magnitude value for the symbol time is selected from the plurality of samples. A symbol-synchronization signal that corresponds to an interval of the sequence of intervals containing the sample with the highest magnitude value is provided to a rake receiver system.

Abstract translation: 相关幅度信号在符号时间上以间隔序列划分为多个样本，其中相关信号对应于在接收机设备处接收的信号与已知序列的相关性的大小。 从多个样本中选择具有符号时间的最大幅度值的样本。 对应于包含具有最高幅度值的样本的间隔的间隔的间隔的符号同步信号被提供给耙式接收器系统。

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。