公开(公告)号：US09184824B1

公开(公告)日：2015-11-10

申请号：US13723476

申请日：2012-12-21

Applicant: Marvell International Ltd.

Inventor： Songping Wu

IPC: H04B7/08 ,  H04B7/06 ,  H04L27/34

CPC classification number: H04L27/08 ,  H04B7/061 ,  H04B7/0814 ,  H04L27/34

Abstract: A first amplifier is configured to provide a first variable gain. A selecting module is configured to (i) connect a first antenna to the first amplifier when a selection signal is in a first state, and (ii) connect a second antenna to the first amplifier when the selection signal is in a second state. A second amplifier is in communication with an output of the first amplifier and is configured to provide a second variable gain. An automatic gain control (AGC) module is configured to control each of the first and second variable gains. An antenna selection module is configured to selectively change the selection signal in response to the first variable gain or the second variable gain after a preamble of a data packet and before a payload of the data packet.

Abstract translation: 第一放大器被配置为提供第一可变增益。 选择模块被配置为（i）当选择信号处于第一状态时，将第一天线连接到第一放大器，以及（ii）当选择信号处于第二状态时，将第二天线连接到第一放大器。 第二放大器与第一放大器的输出端通信并且被配置为提供第二可变增益。 自动增益控制（AGC）模块被配置为控制第一和第二可变增益中的每一个。 天线选择模块被配置为响应于数据分组的前导码之后和数据分组的有效载荷之前的第一可变增益或第二可变增益来选择性地改变选择信号。

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：US09002302B1

公开(公告)日：2015-04-07

申请号：US13953060

申请日：2013-07-29

Applicant: Marvell International Ltd.

Inventor： Hua Qian ,  Songping Wu ,  Daxiao Yu

IPC: H04B1/04 ,  H03C1/62 ,  H04L1/00

CPC classification number: H04L1/0035 ,  H03F1/3241 ,  H04B1/0475 ,  H04B2001/0425

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes operating a device, that includes a receive filter, in different modes comprising an operational mode and a predistortion training mode, where the receive filter is configured to operate at a first bandwidth during the operational mode and operate at a second, wider bandwidth during the predistortion training mode; generating a digital transmit signal; receiving a digital receive signal via the receive filter, causing, in the predistortion training mode, the digital receive signal to be based on an amplified analog version of the digital transmit signal, the amplified analog version being produced by a power amplifier having a nonlinear characteristic(s); estimating predistortion parameter value(s) using samples of the digital transmit signal and samples of the digital receive signal; and using the predistortion parameter value(s) to predistort digital signals to compensate for the nonlinear characteristic(s) of the power amplifier.

Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括以包括操作模式和预失真训练模式的不同模式操作包括接收过滤器的设备，其中接收过滤器被配置为在操作模式期间以第一带宽操作并且在第二较宽 预失真训练模式下的带宽; 产生数字发射信号; 经由接收滤波器接收数字接收信号，使得在预失真训练模式下，数字接收信号基于数字发射信号的放大的模拟版本，放大的模拟版本由具有非线性特性的功率放大器产生 （s）; 使用数字发送信号的采样和数字接收信号的采样来估计预失真参数值; 并使用预失真参数值来预失真数字信号来补偿功率放大器的非线性特性。

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：US09356648B1

公开(公告)日：2016-05-31

申请号：US14281012

申请日：2014-05-19

Applicant: Marvell International Ltd.

Inventor： Songping Wu ,  Quan Zhou ,  Daxiao Yu

IPC: H04B1/707 ,  H04L27/26 ,  H04B1/69

CPC classification number: H04B1/707 ,  H04B1/69 ,  H04L27/0014 ,  H04L27/2071 ,  H04L27/2331 ,  H04L27/2655 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662 ,  H04L2027/0026

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes determining a first frequency offset based on a received preamble of a wireless communication signal and a known preamble, the received preamble having been generated based on a spreading sequence and the known preamble, determining a second frequency offset based on the received preamble and the known preamble, and processing at least a portion of the wireless communication signal based on the first frequency offset and the second frequency offset. Determining the first frequency offset can include performing a multi-chip-level differential frequency offset acquisition that uses two or more chips associated with the received preamble. Determining the second frequency offset can include performing a symbol-level differential frequency offset acquisition that uses two or more symbols associated with the received preamble, where each of the two or more symbols are encoded by two or more chips.

Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括基于无线通信信号和已知前导码的接收到的前导码来确定第一频率偏移，所接收的前同步码已经是基于扩展序列和已知的前同步码产生的，基于所接收的前导码确定第二频率偏移 和已知的前导码，以及基于第一频率偏移和第二频率偏移来处理无线通信信号的至少一部分。 确定第一频率偏移可以包括执行使用与所接收的前导码相关联的两个或多个码片的多码片级差分频率偏移获取。 确定第二频率偏移可以包括执行使用与所接收的前导码相关联的两个或多个符号的符号级差分频率偏移获取，其中两个或更多个符号中的每一个由两个或更多个码片编码。

公开(公告)号：US09148188B1

公开(公告)日：2015-09-29

申请号：US14065158

申请日：2013-10-28

Applicant: Marvell International Ltd.

Inventor： Songping Wu ,  Gang Liu ,  Daxiao Yu ,  Yonghua Song

IPC: H04L7/00 ,  H04B1/16 ,  H04W56/00 ,  H04L27/00 ,  H04W16/14 ,  H04W72/04 ,  H04W72/06 ,  H04W72/08

CPC classification number: H04B1/16 ,  H04L27/0006 ,  H04W16/14 ,  H04W56/0035 ,  H04W72/06 ,  H04W72/08 ,  H04W72/085

Abstract: Systems and methods for using non-crystal-based reference oscillators in the transmission and reception of frequency-modulated signals are disclosed. To protect against intrusion on neighboring designated frequency bands, guard bands, having a collective width greater than the total expected error based on the contribution of the frequency error from the non-crystal-based oscillators in the transmitter and/or receiver, can be designated. To protect against inter-channel interference within a designated frequency band, transmitters and receivers can include static sub-bandwidths wider than any possible total frequency error, such that it would be impossible for a transmitter or receiver to attempt to communicate on an unintended sub-band. The determination of the total possible frequency error can be determined dynamically based on the correlation between a received training sequence and a known pattern before or a communication session to avoid or correct for frequency offset or drift due to the use of non-crystal-based reference oscillators.

Abstract translation: 公开了在频率调制信号的发送和接收中使用基于非晶体的参考振荡器的系统和方法。 为了防止侵入相邻的指定频带，可以指定具有大于总预期误差的总宽度的保护频带，其基于来自发射机和/或接收机中的非晶体振荡器的频率误差的贡献，可以指定 。 为了防止指定频带内的信道间干扰，发射机和接收机可以包括比任何可能的总频率误差更宽的静态子带宽，使得发射机或接收机不可能尝试在非预期子带上进行通信， 带。 可以基于接收到的训练序列与通信会话之前的已知模式之间的相关性来动态地确定总可能的频率误差，以避免或校正由于使用非基于参考的频率偏移或漂移 振荡器。

公开(公告)号：US08995572B1

公开(公告)日：2015-03-31

申请号：US14216646

申请日：2014-03-17

Applicant: Marvell International Ltd.

Inventor： Songping Wu

IPC: H04K1/02

CPC classification number: H04N7/52 ,  H03F1/3247

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes aligning a received data sequence with a transmitted data sequence to produce an aligned data sequence, the received data sequence being based on an output of a power amplifier having one or more nonlinear characteristics that is responsive to the transmitted data sequence; dividing the aligned data sequence into N segments; obtaining first nonlinear parameters for the power amplifier based at least on first segments of the N segments; obtaining a second nonlinear parameter(s) corresponding to a second segment(s) of the N segments based on an extrapolation of the first nonlinear parameters, the second segment(s) having a lower transmitted data sequence value(s) than the first segments; and performing digital predistortion on a transmit data sequence based on the nonlinear predistortion parameters to compensate for the one or more nonlinear characteristics of the power amplifier.

Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括将接收到的数据序列与发送的数据序列对准以产生对准的数据序列，所接收的数据序列基于功率放大器的输出，所述功率放大器的输出具有响应于发送的数据序列的一个或多个非线性特性; 将对齐的数据序列划分成N个段; 基于所述N个段的至少第一段获得所述功率放大器的第一非线性参数; 基于所述第一非线性参数的外推来获得对应于所述N个段的第二段的第二非线性参数，所述第二段具有比所述第一段更低的发射数据序列值 ; 以及基于所述非线性预失真参数对发射数据序列执行数字预失真以补偿所​​述功率放大器的一个或多个非线性特性。

公开(公告)号：US09450848B1

公开(公告)日：2016-09-20

申请号：US14824165

申请日：2015-08-12

Applicant: Marvell International LTD.

Inventor： Songping Wu

IPC: H04L7/00 ,  H04L12/26 ,  H04L27/20

CPC classification number: H04L27/2035 ,  H04L27/16

Abstract: A first network device including modulation, transmit, front end, and phase modules. The modulation module amplitude or frequency modulates a data signal to generate a modulated signal. The transmit module transmits an output signal based on the modulated signal. The front end module obtains a phase of a point in a first cluster of index ratios. Each of the index ratios corresponds to a respective phase of a respective symbol period of the output signal. Each of the index ratios is based on a maximum amplitude, a minimum amplitude or a mean of amplitudes of the output signal over the symbol periods. The amplitudes for each of the means includes a corresponding one of the maximum amplitudes and a corresponding one of the minimum amplitudes. The phase module adjusts a phase of the output signal based on the phase of the point in the first cluster of index ratios.

Abstract translation: 包括调制，传输，前端和相位模块的第一网络设备。 调制模块振幅或频率调制数据信号以产生调制信号。 发送模块基于调制信号发送输出信号。 前端模块获得第一个索引比例簇中的点的相位。 每个索引比率对应于输出信号的相应符号周期的相应相位。 每个索引比率基于符号周期上的输出信号的最大幅度，最小振幅或幅度的平均值。 每个装置的幅度包括最大幅度中的相应一个和最小振幅中相应的一个。 相位模块基于第一个索引比例簇中的点的相位来调整输出信号的相位。

公开(公告)号：US09160586B1

公开(公告)日：2015-10-13

申请号：US14339348

申请日：2014-07-23

Applicant: Marvell International Ltd.

Inventor： Zixia Hu ,  Songping Wu

IPC: H04L27/00 ,  H04L1/00 ,  H04L27/38

CPC classification number: H04L27/0014 ,  H04L27/3863 ,  H04L2027/0016

Abstract: Systems and techniques relating to IQ mismatch estimation and compensation are described. A described technique includes obtaining samples of a received signal via circuitry having an IQ mismatch; determining an estimated gain imbalance parameter for the IQ mismatch based on an in-phase average value of in-phase training samples and a quadrature average value of quadrature training samples; determining an estimated phase imbalance parameter for the IQ mismatch based on a combined average value, the estimated gain imbalance parameter, and a squared average value, the combined average value being based on a pair-wise multiplication of the in-phase training samples and the quadrature training samples, the squared average value being based on squared versions of the in-phase training samples; updating the in-phase data samples based on the estimated gain imbalance parameter to produce updated in-phase data samples; and updating the quadrature data samples by respectively adding quadrature update values thereto.

Abstract translation: 描述与IQ失配估计和补偿相关的系统和技术。 所描述的技术包括通过具有IQ失配的电路来获得接收信号的样本; 基于同相训练样本的同相平均值和正交训练样本的正交平均值，确定IQ失配的估计增益不平衡参数; 基于组合的平均值，估计的增益不平衡参数和平均值来确定IQ失配的估计相位不平衡参数，所述组合平均值基于同相训练样本和 正交训练样本，平均值基于同相训练样本的平方版本; 基于估计的增益不平衡参数来更新同相数据样本以产生更新的同相数据样本; 并且通过分别向它们添加正交更新值来更新正交数据样本。

公开(公告)号：US08989321B1

公开(公告)日：2015-03-24

申请号：US14052927

申请日：2013-10-14

Applicant: Marvell International Ltd.

Inventor： Quan Zhou ,  Songping Wu ,  Daxiao Yu

IPC: H03D1/00 ,  H04L27/06

CPC classification number: H04L27/06 ,  H04L7/042 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675

Abstract: Systems, methods, and other embodiments associated with preamble detection based on repeated preamble codes are described. According to one embodiment, an apparatus is provided that wirelessly receives a signal and calculates a differential output corresponding to a multiplication of the signal and a delayed version of the signal. A cross correlation is performed between the differential output and a known preamble pattern to produce a cross correlation output. One or more peaks are detected in the cross correlation. The detected peaks are used in subsequent processing to detect the known preamble pattern in the wirelessly received signal.

Abstract translation: 描述了基于重复的前导码的与前导码检测相关联的系统，方法和其他实施例。 根据一个实施例，提供了一种无线地接收信号并且计算与信号的乘法和信号的延迟版本相对应的差分输出的装置。 在差分输出和已知前导码模式之间进行互相关以产生互相关输出。 在互相关中检测到一个或多个峰。 检测到的峰值用于随后的处理中以检测无线接收信号中的已知前导码模式。