公开(公告)号：US09882686B1

公开(公告)日：2018-01-30

申请号：US14968489

申请日：2015-12-14

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Bhaskar Nallapureddy ,  Atul Salhotra

IPC: H04B7/02 ,  H04L5/00 ,  H04W72/04 ,  H04L1/00

CPC classification number: H04L5/0023 ,  H04B1/38 ,  H04B7/068 ,  H04L1/0071 ,  H04L5/0044 ,  H04L27/2637 ,  H04W72/04

Abstract: Systems and techniques relating to processing multiple data streams include, according to at least one implementation, receiving a single bit stream during a SISO mode of transmission; receiving two or more bit streams during a MIMO mode of transmission, wherein different rotations are applied to dynamically changed second, third, and fourth ones of the two or more bit streams received during the MIMO mode of transmission to improve transmission robustness and transmission data rate; performing separate de-mapping of subcarriers in the two or more bit streams during the MIMO mode of transmission; performing separate de-interleaving of the two or more bit streams during the MIMO mode of transmission, wherein a first portion of a de-interleaver section that handles a first of the two or more bit streams employs a same de-interleaver operation as during the SISO mode of transmission; and combining the two or more bit streams.

公开(公告)号：US09413574B1

公开(公告)日：2016-08-09

申请号：US13955330

申请日：2013-07-31

Applicant: Marvell International Ltd.

Inventor： Sergey Timofeev ,  Swaroop Venkatesh ,  Atul Salhotra ,  Rohit U. Nabar

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04L27/01

CPC classification number: H04L27/01 ,  H04B1/0007 ,  H04B1/30 ,  H04L25/061 ,  H04L27/2647 ,  H04L27/2657

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08837623B1

公开(公告)日：2014-09-16

申请号：US14148353

申请日：2014-01-06

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Bhaskar Nallapureddy ,  Atul Salhotra

IPC: H04B7/02 ,  H04B7/06 ,  H04B1/38

CPC classification number: H04L5/0023 ,  H04B1/38 ,  H04B7/068 ,  H04L1/0071 ,  H04L5/0044 ,  H04L27/2637 ,  H04W72/04

Abstract: Systems and techniques relating to processing multiple include, according to at least one implementation, a method including obtaining data streams to be transmitted, and applying data rotations to the data streams in connection with interleaving the data streams, wherein each of the data rotations has a constant rotation value for its corresponding stream index regardless of how many data streams are currently being transmitted, a second rotation value used for a second stream is larger than a first rotation value used for a first stream and also large enough to maximize rotation distance between the first and second streams when the current transmission has two streams, a third rotation value used for a third stream is greater than the first rotation value but less than the second rotation value, and a fourth rotation value used for a fourth stream is greater than the second rotation value.

Abstract translation: 与处理多个有关的系统和技术包括根据至少一个实现方式，包括获得要发送的数据流的方法，以及结合数据流的交织将数据旋转应用于数据流，其中每个数据旋转具有 不管当前正在传输多少数据流，其对应的流索引具有恒定的旋转值，用于第二流的第二旋转值大于用于第一流的第一旋转值，并且也足够大以使第二流之间的旋转距离最大化 第一和第二流当当前传输具有两个流时，用于第三流的第三旋转值大于第一旋转值但小于第二旋转值，并且用于第四流的第四旋转值大于 第二旋转值。

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：US08989297B1

公开(公告)日：2015-03-24

申请号：US14486609

申请日：2014-09-15

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Bhaskar Nallapureddy ,  Atul Salhotra

IPC: H04B7/02 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04L5/0023 ,  H04B1/38 ,  H04B7/068 ,  H04L1/0071 ,  H04L5/0044 ,  H04L27/2637 ,  H04W72/04

Abstract: Systems and techniques relating to processing multiple data streams include, according to an aspect, a method including interleaving data streams to be transmitted over a wireless channel, wherein the interleaving comprises performing a first permutation and a second permutation, and applying data rotations to the data streams in connection with the interleaving, wherein each of the data rotations has a constant rotation value for its corresponding stream index regardless of how many data streams are currently being transmitted, a second rotation value used for a second stream is larger than a first rotation value used for a first stream, a third rotation value used for a third stream is greater than the first rotation value but less than the second rotation value, and a fourth rotation value used for a fourth stream is greater than the second rotation value, and wherein the data rotations are applied after the second permutation.

Abstract translation: 与处理多个数据流有关的系统和技术包括：根据一个方面的方法，包括交织要通过无线信道发送的数据流的方法，其中所述交织包括执行第一置换和第二置换，以及将数据旋转应用于所述数据 与交织相关联的流，其中每个数据旋转对于其对应的流索引具有恒定的旋转值，而不管当前正在发送多少数据流，用于第二流的第二旋转值大于第一旋转值 用于第一流，用于第三流的第三旋转值大于第一旋转值但小于第二旋转值，并且用于第四流的第四旋转值大于第二旋转值，并且其中 在第二次排列之后应用数据旋转。

公开(公告)号：US09910129B1

公开(公告)日：2018-03-06

申请号：US14489678

申请日：2014-09-18

Applicant: Marvell International Ltd.

Inventor： Sudhir Srinivasa ,  Hongyuan Zhang ,  Sergey Timofeev ,  Hemabh Shekhar ,  Atul Salhotra

IPC: G01S5/02 ,  H04L12/26

CPC classification number: G01S5/021 ,  H04L43/0864 ,  H04L43/50

Abstract: A method of calibrating analog transceiver delay includes generating a signal in a portion of a first device to arrive at a first known time at analog transmit circuitry of the first device, transmitting the signal from the analog transmit circuitry of the first device, receiving the transmitted signal, and deriving transceiver delay from the received signal. The transmitting may be performed via a closed loop to analog receiver circuitry of the first device, detecting the signal at a second known time at an output of the analog receiver circuitry of the first device. The transmitting also may be performed wirelessly to receiver circuitry of a second device placed at a predetermined distance from the first device, detecting the received signal at a second known time at the receiver circuitry of the second device. Transceiver delay can be determined from transit time and apportioned between transmit delay and receive delay.

公开(公告)号：US09319904B1

公开(公告)日：2016-04-19

申请号：US14875305

申请日：2015-10-05

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 ,  H04W24/02 ,  H04W84/12

CPC classification number: H04W24/00 ,  H04B17/14 ,  H04L43/0852

Abstract: 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 processor device. 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 processor device to the wireless communication device.

Abstract translation: 第一探测包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。 在处理器设备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。 校准系数从处理器设备发送到无线通信设备。

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：US08934577B1

公开(公告)日：2015-01-13

申请号：US13681192

申请日：2012-11-19

Applicant: Marvell International Ltd.

Inventor： Swaroop Venkatesh ,  Atul Salhotra ,  Sergey Timofeev ,  Rohit U. Nabar

IPC: H04L25/06 ,  H04L27/38

CPC classification number: H04L25/06 ,  H04L25/063 ,  H04L27/0008

Abstract: A bias current utilized in a unit of a radio frequency (RF) receiver device of a network interface is controlled. A modulation scheme utilized in a packet being received by the network interface is determined. It is determined, based on the determined modulation scheme, whether a level of the bias current should be changed. When it is determined that the level of the bias current should be changed, a control signal to change the level of the bias current is generated.

Abstract translation: 控制在网络接口的射频（RF）接收机设备的单元中使用的偏置电流。 确定由网络接口​​接收的分组中使用的调制方案。 基于确定的调制方案确定是否应该改变偏置电流的电平。 当确定应该改变偏置电流的电平时，产生改变偏置电流电平的控制信号。

公开(公告)号：US09578682B1

公开(公告)日：2017-02-21

申请号：US14330455

申请日：2014-07-14

Applicant: Marvell International Ltd.

Inventor： Harish Ramamurthy ,  Todd Steven Wheeler ,  Brian Bosso ,  Atul Salhotra ,  Ken Yeung

IPC: H04W4/00 ,  H04W88/06 ,  H04B1/3827

CPC classification number: H04W88/06 ,  H04B1/3827 ,  H04B7/024 ,  H04B7/0602 ,  H04B7/0802 ,  H04W4/80 ,  H04W84/12

Abstract: A device including a first transceiver configured to transmit and receive, using a first antenna, according to a first communication protocol, a second transceiver configured to transmit and receive, using a second antenna, according to the first communication protocol, and a third transceiver configured to transmit and receive, using the second antenna, according to a second communication protocol. A controller is configured to select between a first mode where the first, second, and third transceivers are configured to respectively communicate using the first and second antennas at a same time, and a second mode where the first, second, and third transceivers are configured to respectively communicate using the first and second antennas at different times. In the first mode and the second mode, the controller is further configured to selectively allow the second transceiver to transmit and receive using the second antenna at a same time as the third transceiver.

Abstract translation: 一种包括第一收发器的设备，其被配置为使用第一天线根据第一通信协议来发送和接收第二收发器，所述第二收发器被配置为根据第一通信协议使用第二天线进行发送和接收;以及第三收发器， 根据第二通信协议来使用第二天线发送和接收。 控制器被配置为在第一模式和第二模式之间选择第一模式，其中第一模式，第二和第三收发器被配置为分别使用第一和第二天线同时进行通信;以及第二模式，其中第一，第二和第三收发器被配置 以在不同时间分别使用第一和第二天线进行通信。 在第一模式和第二模式中，控制器进一步被配置为选择性地允许第二收发器在与第三收发器同时使用第二天线进行发送和接收。