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1. 发明授权

US08903025B1 Low complexity technique for detecting data in a received multiple-input-multiple-output (MIMO) signal 有权
标题翻译：用于检测接收的多输入多输出（MIMO）信号中的数据的低复杂度技术
公开(公告)号：US08903025B1
公开(公告)日：2014-12-02
申请号：US14058627
申请日：2013-10-21
申请人： Marvell International Ltd.
发明人： Manikandan Chandrasekar , Ping Gao , Lokesh Sundaramurthy Satrasala , Swaroop Venkatesh , Rohit U. Nabar
IPC分类号： H04L27/06 , H04L27/26 , H04L1/00 , H04L25/03
CPC分类号： H04L25/03318 , H04L1/0054 , H04L25/03891 , H04L2025/03426
摘要： 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.
摘要翻译：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。

2. 发明授权

US10003477B1 Methods and systems for channel estimation enhancement for multi-stream packets 有权
公开(公告)号：US10003477B1
公开(公告)日：2018-06-19
申请号：US15152072
申请日：2016-05-11
申请人： Marvell International Ltd.
发明人： Ankit Sethi , Swaroop Venkatesh , Sudhir Srinivasa , Hongyuan Zhang
IPC分类号： H04L25/02 , H04L27/26
CPC分类号： H04L25/0204 , H04L25/0228 , H04L25/0242 , H04L27/2657 , H04L27/2695
摘要： Methods and systems are disclosed herein for performing channel estimation for multi-stream packets. The method may include receiving a data packet comprising a plurality of training fields, wherein the plurality of training fields comprises a training field, wherein the training field comprises a plurality of tones, and wherein the plurality of tones comprises a first tone and a second tone. The method may include modifying the first tone based on a predetermined signal associated with the first tone. The method may include storing the first tone in a data structure associated with the first tone. The method may include modifying the data structure based on the second tone.

3. 发明授权

US09860096B1 Systems and methods for carrier frequency offset and drift cancellation based indoor position estimation 有权
公开(公告)号：US09860096B1
公开(公告)日：2018-01-02
申请号：US15241775
申请日：2016-08-19
申请人： Marvell International Ltd.
发明人： Vijay Ganwani , Swaroop Venkatesh , Ankit Sethi , Sudhir Srinivasa
IPC分类号： H04W24/00 , H04L27/20 , H04W4/04
CPC分类号： H04L27/2082 , H04W4/04
摘要： Embodiments described herein provide a method for carrier frequency offset and frequency drift cancellation based indoor position estimation. A wireless signal including a plurality of data samples is received at a receiving antenna and from a mobile device. Information relating to an antenna switching pattern for transmitting or receiving the wireless signal may then be obtained from the wireless signal. A phase difference is calculated associated with each data sample of plurality of data samples. Carrier frequency offset and frequency drift cancellation may be applied to the phase difference to obtain a compensated phase difference. A direction estimate of the mobile device may then be generated based at least in part on the compensated phase difference.

4. 发明授权

US09413574B1 Systems and methods for DC offset correction 有权
标题翻译：用于直流偏移校正的系统和方法
公开(公告)号：US09413574B1
公开(公告)日：2016-08-09
申请号：US13955330
申请日：2013-07-31
申请人： Marvell International Ltd.
发明人： Sergey Timofeev , Swaroop Venkatesh , Atul Salhotra , Rohit U. Nabar
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08 , H04L27/01
CPC分类号： H04L27/01 , H04B1/0007 , H04B1/30 , H04L25/061 , H04L27/2647 , H04L27/2657
摘要： Systems and methods for removing DC offset from a signal are provided. A radio frequency signal is received at a receiver. The radio frequency signal is converted into a digital signal including a periodic component with a period. A carrier frequency offset is removed from the digital signal to generate a frequency-shifted digital signal. The frequency-shifted digital signal is filtered to remove a DC offset in the digital signal. The filtering includes applying a moving average filter matched to the period to remove the periodic component from the frequency-shifted digital signal. The moving average filter generates a set of average values based on the frequency-shifted digital signal. The filtering also includes taking a difference between consecutive values of the set of average values to determine the DC offset, where the DC offset is introduced at the receiver.
摘要翻译：提供了从信号中去除DC偏移的系统和方法。在接收机处接收射频信号。射频信号被转换为包括具有周期的周期分量的数字信号。从数字信号中移除载波频率偏移以产生频移数字信号。对频移数字信号进行滤波以去除数字信号中的直流偏移。滤波包括应用与该周期匹配的移动平均滤波器以从频移数字信号中去除周期性分量。移动平均滤波器基于频移数字信号产生一组平均值。滤波还包括取平均值集合的连续值之间的差值来确定DC偏移，其中在接收器处引入DC偏移。

5. 发明授权

US09160489B1 Origin dodging for transmitted signal 有权
标题翻译：原始躲避传输信号
公开(公告)号：US09160489B1
公开(公告)日：2015-10-13
申请号：US14482531
申请日：2014-09-10
申请人： MARVELL INTERNATIONAL LTD.
发明人： Luns Tee , Swaroop Venkatesh , Ankit Sethi
IPC分类号： H03C3/00 , H04L1/00 , H04L27/20 , H04B1/04
CPC分类号： H04B1/0475 , H04L27/20
摘要： Systems and methods associated with origin dodging for a transmitted signal are described. One method includes receiving a transmission sequence for transmission to a receiver. The transmission sequence includes a sequence of transmit symbols and each transmit symbol corresponds to a coordinate pair positioning the transmit symbol's phase on an I-Q plane. The method includes sampling and filtering the transmission sequence to create transition samples and determining whether any transition sample is within a predetermined radius of an origin of the I-Q plane. When a transition sample is positioned within the radius, the method includes generating a dodging symbol and inserting the dodging symbol into the transmission sequence to create a modified transmission sequence. A filtered signal that includes filtered samples of the modified transmission sequence is provided.
摘要翻译：描述与发射信号的起始避雷相关联的系统和方法。一种方法包括接收用于传输到接收机的传输序列。发送序列包括发送符号的序列，并且每个发送符号对应于将发送符号的相位定位在I-Q平面上的坐标对。该方法包括对传输序列进行采样和滤波以产生转换样本并确定任何转换样本是否在I-Q平面的原点的预定半径内。当转移样本位于半径内时，该方法包括产生闪避符号并将闪避符号插入到传输序列中以创建经修改的传输序列。提供包括经修改的传输序列的经滤波样本的滤波信号。

6. 发明授权

US08959419B1 Viterbi architecture for BDR/BLE 有权
标题翻译：维特比BDR / BLE架构
公开(公告)号：US08959419B1
公开(公告)日：2015-02-17
申请号：US13719810
申请日：2012-12-19
申请人： Marvell International Ltd.
发明人： Ankit Sethi , Swaroop Venkatesh , Rohit U. Nabar , Vijay Ahirwar
IPC分类号： H03M13/03 , H04L1/00
CPC分类号： H04L1/0054 , H03M13/41 , H03M13/4107
摘要： A Viterbi decoder module includes a branch metric module configured to calculate branch metrics corresponding to a continuous phase modulated signal. Each of the branch metrics corresponds to a respective path between stages of the Viterbi decoder module. A path metric module is configured to calculate a first cost metric associated with the first state of the next stage based on the first branch metric and the second branch metric, and calculate a second cost metric associated with the second state of the next stage based on the third branch metric and the fourth branch metric. A traceback module is configured to determine a maximum likelihood path between stages of the Viterbi decoder based on the first cost metric and the second cost metric. The Viterbi decoder module is configured to output decoded data based on the maximum likelihood path.
摘要翻译：维特比解码器模块包括被配置为计算与连续相位调制信号相对应的分支度量的分支度量模块。每个分支量度对应于维特比解码器模块的级之间的相应路径。路径度量模块被配置为基于第一分支度量和第二分支量度来计算与下一级的第一状态相关联的第一成本度量，并且基于与第二成本度量相关联的第二成本度量，基于第三分支度量和第四分支度量。回溯模块被配置为基于第一成本度量和第二成本度量来确定维特比解码器的级之间的最大似然路径。维特比解码器模块被配置为基于最大似然路径输出解码数据。

7. 发明授权

US08718176B1 Method for computing sub-stream invariant steering matrices for MIMO beamforming 有权
标题翻译：用于计算MIMO波束成形的子流不变导引矩阵的方法
公开(公告)号：US08718176B1
公开(公告)日：2014-05-06
申请号：US13730393
申请日：2012-12-28
申请人： Marvell International Ltd.
发明人： Arul Durai Murugan Palanivelu , Hongyuan Zhang , Swaroop Venkatesh
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0456 , H04B7/0452 , H04B7/0617 , H04L27/2626
摘要： In a method for generating steering matrices for beamforming, one or more subsets of one or more maximum transmit steering matrices are selected, where the maximum transmit steering matrices correspond to a maximum number of spatial streams able to be transmitted from a transmitter to a receiver. The subsets correspond to an actual number of spatial streams to be transmitted, and the subsets are applied to spatial streams to be transmitted. In an apparatus for generating steering matrices, a steering matrix calculator is configured to determine, from maximum transmit steering matrices, a plurality of steering coefficients corresponding to an actual number of spatial streams.
摘要翻译：在用于生成用于波束形成的导引矩阵的方法中，选择一个或多个最大发射导引矩阵的一个或多个子集，其中最大发射导向矩阵对应于能够从发射机发射到接收机的最大数量的空间流。子集对应于要发送的空间流的实际数量，并且子集被应用于要发送的空间流。在用于产生导向矩阵的装置中，导引矩阵计算器被配置为从最大发射导向矩阵确定与实际数量的空间流相对应的多个转向系数。

8. 发明授权

US10616004B1 Methods and systems for channel estimation enhancement for multi-stream packets 有权
公开(公告)号：US10616004B1
公开(公告)日：2020-04-07
申请号：US16011017
申请日：2018-06-18
申请人： Marvell International Ltd.
发明人： Ankit Sethi , Swaroop Venkatesh , Sudhir Srinivasa , Hongyuan Zhang
IPC分类号： H04L25/02 , H04L27/26
CPC分类号： H04L25/0204 , H04L25/0228 , H04L27/2601
摘要： Methods and systems are disclosed herein for performing channel estimation for multi-stream packets. The method may include receiving a data packet comprising a plurality of training fields, wherein the plurality of training fields comprises a training field, wherein the training field comprises a plurality of tones, and wherein the plurality of tones comprises a first tone and a second tone. The method may include modifying the first tone based on a predetermined signal associated with the first tone. The method may include storing the first tone in a data structure associated with the first tone. The method may include modifying the data structure based on the second tone.

9. 发明授权

US09319179B1 Methods and apparatus for generating expanded code words to support error correction in a data communication system 有权
标题翻译：用于产生扩展码字以支持数据通信系统中的纠错的方法和装置
公开(公告)号：US09319179B1
公开(公告)日：2016-04-19
申请号：US14247685
申请日：2014-04-08
申请人： Marvell International Ltd.
发明人： Vijay Ahirwar , Ankit Sethi , Swaroop Venkatesh , Josselin de la Broise
IPC分类号： H04L1/00 , H04L1/18 , H03M13/15 , H04L1/06 , H04L25/03 , G06F11/10 , H03M13/29
CPC分类号： H04L1/0041 , G06F11/10 , H03M13/13 , H03M13/152 , H03M13/29 , H04L1/00 , H04L1/0045 , H04L1/005 , H04L1/0057 , H04L1/0061 , H04L1/0065 , H04L1/0625 , H04L1/1845 , H04L2025/03426
摘要： The present disclosure describes methods and apparatus for generating expanded code words to support error correction in a data communication system. In some aspects data to be encoded and a first subset of bits of a first bit sequence are obtained. A first combined bit sequence is generated by combining the data and the first subset of bits. A first code word is generated by applying an error correcting code to the first combined bit sequence. The first code word is combined with the first bit sequence, resulting in first encoded data that includes both first parity information and the data. The generating, applying, and combining are repeated with a second subset of bits of a second bit sequence, resulting in second encoded data that includes both second parity information and the data, the second encoded data being based on a second code word rather than the first code word.
摘要翻译：本公开描述了用于生成扩展代码字以支持数据通信系统中的纠错的方法和装置。在一些方面，获得待编码的数据和第一比特序列的比特的第一子集。通过组合数据和比特的第一子集来生成第一组合比特序列。通过对第一组合位序列应用纠错码来生成第一码字。第一码字与第一比特序列组合，产生包括第一奇偶校验信息和数据的第一编码数据。利用第二比特序列的比特的第二子集重复生成，应用和组合，产生包括第二奇偶校验信息和数据的第二编码数据，第二编码数据基于第二码字而不是第二码字第一个代码字。

10. 发明授权

US09214973B1 Time varying notch filter 有权
标题翻译：时变陷波滤波器
公开(公告)号：US09214973B1
公开(公告)日：2015-12-15
申请号：US13941390
申请日：2013-07-12
申请人： Marvell International Ltd.
发明人： Swaroop Venkatesh , Vijay Ahirwar
IPC分类号： H04B1/10 , H04B1/00 , H03H15/00 , H04B1/04 , H04B1/525
CPC分类号： H04B1/1036 , H03H11/04 , H03H17/025 , H03H17/0294 , H03H17/04 , H03H2011/0488 , H03H2015/007 , H04B1/001 , H04B1/0475 , H04B1/1027 , H04B1/109 , H04B1/525 , H04B15/02 , H04B15/06 , H04B2001/1063 , H04B2215/064
摘要： The present disclosure includes systems and techniques relating to time-varying notch filter. In some implementations, an apparatus includes a time-variant notch filter and a controller. The time-variant notch filter includes a notch depth and a notch bandwidth. At least one of the notch depth or the notch bandwidth is based on a coefficient of the notch filter. The controller is configured to set at least one of the notch depth to a first depth or the notch bandwidth to a first bandwidth by setting a value of the coefficient to a first value during a ramp-up of the notch filter before a packet is received. The controller is also configured to set at least one of the notch depth to a second depth or the notch bandwidth to a second bandwidth by adjusting the value of the coefficient to a second value after the packet is received.
摘要翻译：本公开包括与时变陷波滤波器相关的系统和技术。在一些实施方式中，一种装置包括时变陷波滤波器和控制器。时变陷波滤波器包括陷波深度和陷波带宽。陷波深度或陷波带宽中的至少一个基于陷波滤波器的系数。控制器被配置为通过在接收到分组之前在陷波滤波器的斜坡上升期间将系数的值设置为第一值，将陷波深度中的至少一个设置为第一深度或陷波带宽至第一带宽。控制器还被配置为通过在接收到分组之后将系数的值调整为第二值，将陷波深度中的至少一个设置为第二深度或陷波带宽到第二带宽。

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