公开(公告)号：US09166662B1

公开(公告)日：2015-10-20

申请号：US13925206

申请日：2013-06-24

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Yakun Sun

IPC: H04W4/00 ,  H04B7/04 ,  H04L12/933 ,  H04L25/03 ,  H04L25/02

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0608 ,  H04B7/0617 ,  H04B7/0671 ,  H04B7/12 ,  H04L25/0242 ,  H04L25/03898 ,  H04L25/03949 ,  H04L49/101

Abstract: A computer readable storage medium or media stores machine readable instructions that, when executed by one or more processors, cause the processors to generate, using reference signals received via a first communication channel from a first communication device to a second communication device, an estimate of the first communication channel using the received reference signals, calculate one or more transmit beamforming vectors using the estimate of the first communication channel, and utilize the one or more transmit beamforming vectors to process signals to be transmitted via a second communication channel from the second device to the first device. The first device processes the signals to be transmitted from the second device to the first device according to a model H ei, where H is a matrix representing the second communication channel and ei is a vector with all components of ei, except an ith component, being equal to zero.

Abstract translation: 计算机可读存储介质或介质存储机器可读指令，当被一个或多个处理器执行时，使得处理器使用经由第一通信信道从第一通信设备接收的参考信号来生成从第一通信设备到第二通信设备的估计 使用所接收的参考信号的第一通信信道，使用第一通信信道的估计来计算一个或多个发射波束形成向量，并且利用一个或多个发射波束成形向量来处理经由第二通信信道从第二设备发送的信号 到第一个设备。 第一设备根据模型H ei处理要从第二设备发送到第一设备的信号，其中H是表示第二通信信道的矩阵，ei是除了第i个分量之外的所有ei分量的向量， 等于零。

公开(公告)号：US09160436B1

公开(公告)日：2015-10-13

申请号：US14107183

申请日：2013-12-16

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC: H03D1/00 ,  H04L27/06 ,  H04B7/08 ,  H04B1/10

CPC classification number: H04B7/08 ,  H04B1/10 ,  H04B7/0669 ,  H04B7/0845 ,  H04L1/0631 ,  H04L1/0668

Abstract: Systems and methods are provided for decoding a signal vector in a transmit diversity scheme for varying channels. Information obtained in more than one symbol period are treated as a single received vector, and each of the received signal vectors may be processed to reduce the effects of varying channel characteristics. The received signal vectors may be combined by addition and decoded using a maximum-likelihood decoder. In some embodiments, the received signal vectors are processed separately and then combined. In other embodiments, the received signal vectors are combined and then processed. In some embodiments, zero-forced linear equalization techniques are used to processed the received signals. In some embodiments the signal vectors and varying channel response matrices are broken down to equivalent forms in order to simplify the processing.

Abstract translation: 提供了用于对用于不同信道的发射分集方案中的信号矢量进行解码的系统和方法。 在多个符号周期中获得的信息被视为单个接收向量，并且可以处理每个接收信号向量以减少变化的信道特性的影响。 接收的信号矢量可以通过加法组合，并使用最大似然解码器解码。 在一些实施例中，接收的信号向量被单独处理，然后组合。 在其他实施例中，接收的信号向量被组合然后被处理。 在一些实施例中，使用零强制线性均衡技术来处理所接收的信号。 在一些实施例中，为了简化处理，信号向量和变化的信道响应矩阵被分解成等同的形式。

公开(公告)号：US09143219B1

公开(公告)日：2015-09-22

申请号：US14320098

申请日：2014-06-30

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Kedar Shirali ,  Rohit U. Nabar ,  Atul Salhotra

IPC: H04B7/06

CPC classification number: H04B7/0678 ,  H04L1/06

Abstract: A transceiver utilizes a spatial spreading matrix to distribute two or more encoded spatial data streams to multiple antennas. The spatial spreading matrix satisfies one or more of the following two constraints: (a) the ratio of squared norms of the sum of the components of a row, for different rows of the spatial spreading matrix, is equal to a first constant sequence, and (b) the ratio of squared norms of the sum of a symbol S1 to be transmitted, when the symbol S1 is equal to 1 or −1, multiplied by each of the components of a row, for different rows of the spatial spreading matrix, is equal to a second constant sequence.

Abstract translation: 收发器利用空间扩展矩阵将两个或多个编码空间数据流分配到多个天线。 空间扩展矩阵满足以下两个约束中的一个或多个：（a）对于空间扩展矩阵的不同行，行的分量之和的平方的比率等于第一常数序列，并且 （b）对于空间扩展矩阵的不同行，当符号S1等于1或-1时，要发送的符号S1的总和的平方范数与行的每个分量相乘， 等于第二个常数序列。

公开(公告)号：US09084133B1

公开(公告)日：2015-07-14

申请号：US13852591

申请日：2013-03-28

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC: H04L27/06 ,  H04W24/02

CPC classification number: H04W24/02 ,  H04L25/0224 ,  H04L25/0244 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2675 ,  H04L27/2695

Abstract: A mobile station including an estimation module, a filter module, and a control module. The estimation module is configured to generate first channel estimates based on an input signal received, through a channel, from a base station. The input signal includes subcarriers used by the base station to transmit preamble sequences. The filter module is configured to generate second channel estimates by filtering the first channel estimates using a first filter or a second filter. The first filter or the second filter is selected according to a number of the subcarriers used to transmit the preamble sequences. The control module is configured to, based on the first channel estimates and the second channel estimates, estimate (i) one of the preamble sequences and (ii) the channel.

Abstract translation: 一种包括估计模块，滤波器模块和控制模块的移动站。 估计模块被配置为基于通过信道从基站接收的输入信号来生成第一信道估计。 输入信号包括由基站用于发送前同步码序列的子载波。 滤波器模块被配置为通过使用第一滤波器或第二滤波器对第一信道估计进行滤波来生成第二信道估计。 第一滤波器或第二滤波器根据用于发送前同步码序列的副载波的数量来选择。 控制模块被配置为基于第一信道估计和第二信道估计来估计（i）前导码序列之一和（ii）信道。

公开(公告)号：US09065630B1

公开(公告)日：2015-06-23

申请号：US14027894

申请日：2013-09-16

Applicant: Marvell International Ltd.

Inventor： Chusong Xiao ,  Qing Zhao ,  Manyuan Shen ,  Leilei Song ,  Hui-Ling Lou

IPC: H04J3/06 ,  H04L7/04

CPC classification number: H04L7/042 ,  H04W56/0085

Abstract: Systems and methods are provided for detecting a received synchronization signal. The method includes receiving, at a receiver, a signal from a transmitter, where one or more portions of the received signal include the received synchronization signal. The method includes processing the one or more portions of the received signal to obtain a differential signal, and processing the differential signal and a plurality of candidate differential synchronization signals to obtain a plurality of cross-correlation signals. Each candidate differential synchronization signal is associated with one cross-correlation signal. The method includes selecting, based at least in part on the plurality of cross-correlation signals, one of the candidate differential synchronization signals, and detecting the received synchronization signal based at least in part on (i) the one or more portions of the received signal, and (ii) a frequency offset value obtained from the cross-correlation signal associated with the selected candidate differential synchronization signal.

Abstract translation: 提供了用于检测所接收的同步信号的系统和方法。 该方法包括在接收机处接收来自发射机的信号，其中接收信号的一个或多个部分包括所接收的同步信号。 该方法包括处理接收信号的一个或多个部分以获得差分信号，以及处理差分信号和多个候选差分同步信号以获得多个互相关信号。 每个候选差分同步信号与一个互相关信号相关联。 该方法至少部分地基于多个互相关信号来选择候选差分同步信号中的一个，并且至少部分地基于（i）所接收的一个或多个部分来检测所接收的同步信号 信号，以及（ii）从与所选候选差分同步信号相关联的互相关信号获得的频率偏移值。

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

IPC: H04L23/02 ,  H04L5/12 ,  H04B7/04

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。

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

IPC: H04Q7/24 ,  H04W84/02 ,  H04J11/00

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。

公开(公告)号：US08831148B1

公开(公告)日：2014-09-09

申请号：US13947752

申请日：2013-07-22

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Qing Zhao ,  Hui-Ling Lou

IPC: H04L27/08

CPC classification number: H04L27/08 ,  H03G3/3052 ,  H03G3/3078 ,  H04L27/2626

Abstract: A system including a variable gain amplifier, an automatic gain control module, and a channel estimation module. The variable gain amplifier is configured to amplify an input signal in accordance with a gain. The input signal includes a plurality of orthogonal frequency domain multiplexing symbols. Each of the plurality of orthogonal frequency domain multiplexing symbols is preceded by a respective cyclic prefix. The automatic gain control module is configured to adjust, based on a signal strength of the input signal, the gain of the variable gain amplifier during the respective cyclic prefix preceding each of the plurality of orthogonal frequency domain multiplexing symbols. The channel estimation module is configured to generate a channel estimate for each of the plurality of orthogonal frequency domain multiplexing symbols, and to update the channel estimate in response to the gain of the variable gain amplifier being adjusted.

Abstract translation: 一种包括可变增益放大器，自动增益控制模块和信道估计模块的系统。 可变增益放大器被配置为根据增益来放大输入信号。 输入信号包括多个正交频域复用符号。 多个正交频域复用符号中的每一个前面都有相应的循环前缀。 所述自动增益控制模块被配置为基于所述输入信号的信号强度，在所述多个正交频域复用符号中的每一个之前的相应循环前缀期间调整所述可变增益放大器的增益。 信道估计模块被配置为针对多个正交频域复用符号中的每一个生成信道估计，并且响应于被调整的可变增益放大器的增益来更新信道估计。

公开(公告)号：US08797212B1

公开(公告)日：2014-08-05

申请号：US13898247

申请日：2013-05-20

Applicant: Marvell International Ltd.

Inventor： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H01Q3/00 ,  H01Q3/26

CPC classification number: H04B7/0617 ,  H01Q3/2605 ,  H01Q3/40 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/088

Abstract: A plurality of received signals are received at a first communication device, the plurality of received signals corresponding to at least one training signal having been transmitted by a second communication device a plurality of times via a plurality of antennas by the second communication device applying a respective antenna weight vector from a plurality of different antenna weight vectors each time the at least one training signal is transmitted. The first communication device generates a transmitter antenna weight vector based on a mathematical combination of at least i) the plurality of received signals, ii) the antenna weight vectors applied by the second communication device when transmitting the at least one training signal the plurality of times, and iii) the at least one training signal. The first communication device transmits the transmitter antenna weight vector to the second communication device.

Abstract translation: 多个接收信号在第一通信设备处被接收，所述多个接收信号对应于由第二通信设备多次通过第二通信设备经由多个天线发送的至少一个训练信号，所述第二通信设备应用相应的 每次发送至少一个训练信号时，来自多个不同的天线权重向量的天线权重向量。 第一通信设备基于至少i）多个接收信号的数学组合生成发射机天线权重向量，ii）当第二通信设备在多次发送至少一个训练信号时施加的天线权重向量 ，和iii）所述至少一个训练信号。 第一通信设备向第二通信设备发送发射机天线加权矢量。

公开(公告)号：US08644184B1

公开(公告)日：2014-02-04

申请号：US13716928

申请日：2012-12-17

Applicant: Marvell International Ltd.

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

IPC: H04B7/00

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

Abstract: A set of multiple training signals to be transmitted via multiple antennas over a communication channel are generated, and a different antenna weight vector (AWV) from a first set of AWVs is applied to each of the multiple training signals as the training signals are transmitted during a current iteration of a beamforming procedure. Feedback generated using the multiple training signals is received. A second set of AWVs to be used in a next iteration of the beamforming procedure is determined using the feedback.

Abstract translation: 生成将通过通信信道经由多个天线发送的一组多个训练信号，并且当训练信号被传送到多个训练信号中时，来自第一组AWV的不同天线加权矢量（AWV）被施加到多个训练信号中的每一个 波束形成过程的当前迭代。 接收使用多个训练信号产生的反馈。 使用反馈确定在波束形成过程的下一次迭代中使用的第二组AWV。