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：US09888496B1

公开(公告)日：2018-02-06

申请号：US14821202

申请日：2015-08-07

Applicant: Marvell International Ltd.

Inventor： Xiayu Zheng ,  Hongyuan Zhang ,  Ping Gao ,  Sudhir Srinivasa ,  Sergey Timofeev

IPC: H04W74/08 ,  H04L27/26

CPC classification number: H04W74/0808 ,  H04L27/2601 ,  H04L27/2657 ,  H04L27/2663 ,  H04L27/2666 ,  H04L27/2675

Abstract: In accordance with embodiments of the present disclosure there is provided a method for carrier sensing. The method includes receiving, at a wireless receiver, an input signal, and generating, based on a sampling period, a plurality of data samples from the input signal. The method further includes periodically combining a first data sample from the plurality of data samples with a second data sample that is one or more sampling periods before the first data sample to generate a combined data sample. The method further includes generating an auto-correlated output for carrier sensing based on the combined data sample. The auto-correlated output is provided to generate an estimate of phase difference between the first sample and the second sample for the periodic combining.

公开(公告)号：US10820261B1

公开(公告)日：2020-10-27

申请号：US16441283

申请日：2019-06-14

Applicant: Marvell International Ltd.

Inventor： Chor-Teck Law ,  Hongyuan Zhang ,  Sergey Timofeev ,  Mao Yu

IPC: H04W48/16 ,  H04W84/12

Abstract: A radiofrequency system includes a plurality of transceivers providing a plurality of channels, and circuitry configured to perform off-channel functions. A first subset of channels performs radiofrequency communication functions, and a second subset of channels provides signals for the off-channel functions. The first subset of channels may be provided by a first subset of transceivers, and the second subset of channels may be provided by a second subset of transceivers. A spectrum sensing unit may select between the first subset of transceivers and the second subset of transceivers. The circuitry configured to perform the off-channel functions may use the second subset of the plurality of channels to perform neighborhood discovery. The circuitry configured to perform the off-channel functions may scan available communications channels for interference, storing identifications of interference-free channels, and, upon detection of interference on a channel in use, may select one of the interference-free channels.

公开(公告)号：US10523246B1

公开(公告)日：2019-12-31

申请号：US16144595

申请日：2018-09-27

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Sergey Timofeev ,  Lance Nagamine ,  Tsunglun Yu

IPC: H04B1/00 ,  H04B7/0413 ,  H04B7/0404 ,  H04W88/06

Abstract: The present disclosure describes apparatuses and methods for a configurable wireless communication chip. In some aspects, a wireless communication chip includes multiple radio paths and is capable of operating in a first communication mode that supports communication in non-contiguous segments of bandwidth and a second communication mode that does not support communication in non-contiguous segments of bandwidth. Based on a hardware configuration external to the wireless communication chip, the radio paths can be configured to operate in the first communication mode or the second communication mode. In some cases, the hardware configuration external to the wireless communication chip includes fewer antennas or amplifier paths than radio paths of the chip, such as due to cost or form-factor considerations. In such cases, the wireless communication chip can operate in the second communication mode to implement advanced communication techniques with reduced hardware, enabling flexibility to design lower cost or smaller devices.

公开(公告)号：US08897729B1

公开(公告)日：2014-11-25

申请号：US14066087

申请日：2013-10-29

Applicant: Marvell International Ltd.

Inventor： Li Lin ,  Arnab Kumar Mitra ,  Daxiao Yu ,  Harish Ramamurthy ,  Sergey Timofeev ,  Lance Nagamine ,  Brian Bosso

IPC: H01Q11/12 ,  H04B1/04 ,  H04W52/08

CPC classification number: H04W52/08 ,  H04B1/04 ,  H04B17/13 ,  H04B2001/0416

Abstract: A radio frequency transmitting system which includes first and second amplifiers, a power detector, and a calibration module. The first amplifier amplifies an input signal to generate an amplified signal in accordance with a programmable gain. The second amplifier transmits an output signal based on the amplified signal. The output signal is transmitted at a particular power by the second amplifier. The power detector measures the particular power at which the output signal is transmitted by the second amplifier. The calibration module adjusts the programmable gain of the first amplifier by a calibration offset so that the particular power measurement matches a predetermined power. The calibration module includes offset generation modules that each generate a respective calibration offset candidate based on the particular power measurement. The calibration module also includes a selection module that selects, based on the predetermined power, one of the calibration offset candidates as the calibration offset.

Abstract translation: 一种射频发射系统，包括第一和第二放大器，功率检测器和校准模块。 第一放大器放大输入信号以根据可编程增益产生放大信号。 第二放大器基于放大信号发送输出信号。 输出信号由第二放大器以特定功率发送。 功率检测器测量第二放大器输出信号传输的特定功率。 校准模块通过校准偏移来调节第一放大器的可编程增益，使得特定功率测量与预定功率匹配。 校准模块包括偏移生成模块，每个偏移生成模块基于特定功率测量产生相应的校准偏移候选。 校准模块还包括选择模块，其基于预定功率选择校准偏移候选中的一个作为校准偏移。

公开(公告)号：US10368303B1

公开(公告)日：2019-07-30

申请号：US15868526

申请日：2018-01-11

Applicant: Marvell International Ltd.

Inventor： Chor-Teck Law ,  Hongyuan Zhang ,  Sergey Timofeev ,  Mao Yu

IPC: H04W48/16 ,  H04W84/12

Abstract: A radiofrequency system includes a plurality of transceivers providing a plurality of channels, and circuitry configured to perform off-channel functions. A first subset of channels performs radiofrequency communication functions, and a second subset of channels provides signals for the off-channel functions. The first subset of channels may be provided by a first subset of transceivers, and the second subset of channels may be provided by a second subset of transceivers. A spectrum sensing unit may select between the first subset of transceivers and the second subset of transceivers. The circuitry configured to perform the off-channel functions may use the second subset of the plurality of channels to perform neighborhood discovery. The circuitry configured to perform the off-channel functions may scan available communications channels for interference, storing identifications of interference-free channels, and, upon detection of interference on a channel in use, may select one of the interference-free channels.

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：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：US09246668B1

公开(公告)日：2016-01-26

申请号：US14205594

申请日：2014-03-12

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Mao Yu ,  Ming Ta Lin ,  Sergey Timofeev

IPC: H04L7/00 ,  H04L7/02

CPC classification number: H04L7/0029 ,  H04L27/2662 ,  H04L27/2678

Abstract: Systems, methods, and other embodiments associated with unified control of timing recovery and packet processing are described. According to one embodiment, a method for performing unified control of timing recovery and packet processing is provided. The method includes sampling a received signal according to an ADC timing signal to produce a sequence of samples. The received signal corresponds to a packet and was transmitted according to a transmit timing signal. The method includes determining a phase offset between the ADC timing signal and the transmit timing signal and identifying, based, at least in part, on the phase offset, a data portion of the sequence of samples that contains data encoded in the received signal. A re-generated sample sequence that adjusts the data portion based on the phase offset is calculated.

Abstract translation: 描述了与定时恢复和分组处理的统一控制相关联的系统，方法和其他实施例。 根据一个实施例，提供了一种用于执行定时恢复和分组处理的统一控制的方法。 该方法包括根据ADC定时信号对接收到的信号进行采样以产生采样序列。 接收到的信号对应于分组，并根据发送定时信号发送。 该方法包括确定ADC定时信号和发射定时信号之间的相位偏移，并且至少部分地基于相位偏移来识别包含在接收信号中编码的数据的采样序列的数据部分。 计算基于相位偏移来调整数据部分的重新生成的采样序列。

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。