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公开(公告)号：US11025368B2
公开(公告)日：2021-06-01
申请号：US15595116
申请日：2017-05-15
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Hui-Ling Lou , Rohit U. Nabar , Sudhir Srinivasa , Mao Yu , Raja Banerjea
Abstract: A preamble of a physical layer (PHY) data unit that conforms to a first communication protocol is generated. The preamble includes a legacy field that is formatted according to a second communication protocol, and a signal field having a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol. The first OFDM symbol (i) immediately follows the legacy field and (ii) is modulated using binary phase shift keying (BPSK) modulation, whereas a third communication protocol specifies that an OFDM symbol, defined by the third communication protocol, that immediately follows the legacy field is modulated using BPSK modulation rotated by 90 degrees (Q-BPSK). The second OFDM symbol (i) immediately follows the first OFDM symbol and (ii) is modulated using Q-BPSK to indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol.
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公开(公告)号：US09955446B2
公开(公告)日：2018-04-24
申请号：US14987264
申请日：2016-01-04
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Mao Yu , Su Khiong Yong , Sudhir Srinivasa
CPC classification number: H04W56/004 , G01S5/06 , G01S11/02 , G01S13/767 , H04W56/002 , H04W64/003
Abstract: Methods, systems, and apparatus are disclosed for determining accurate ranging measurements between communication devices. Various embodiments are described for recording timestamps associated with when transmissions are sent and received between the communication devices. The communication devices are configured to determine a difference in their clock frequencies and to communicate this difference with one another. Furthermore, each of the communication devices is configured to compensate for these differences before or after the timestamps are exchanged and to send a compensation indicator of whether the compensation has been performed. If the compensation has not been performed, either of the communication devices can compensate for the clock frequency differences after receiving the timestamps based on the compensation indicator. By using compensated clock frequencies based on a single clock reference, highly accurate ranging measurements are obtained using round trip propagation time calculations.
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公开(公告)号：US10455534B2
公开(公告)日：2019-10-22
申请号：US15958319
申请日：2018-04-20
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Mao Yu , Su Khiong Yong , Sudhir Srinivasa
Abstract: Timestamps associated with when transmissions are sent and received between a pair of communication devices are used to determine a distance between the pair of communication devices. The communication devices operate according to a wireless communication protocol, which specifies that a requester of a ranging measurement session is to compensate for a clock frequency offset between the pair of communication device and that a responder is not to compensate for the clock frequency offset. As part of the ranging measurement session, the responder sends feedback to the requester, where the feedback includes timestamps recorded by the responder. The timestamps in the feedback are not compensated for the clock frequency offset by the responder. After receiving the feedback, the requester compensates the timestamps in the feedback for the clock frequency offset before using the timestamps to calculate the distance between the pair of communication devices.
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公开(公告)号：US09232493B2
公开(公告)日：2016-01-05
申请号：US14170027
申请日：2014-01-31
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Mao Yu , Su Khiong Yong , Sudhir Srinivasa
CPC classification number: H04W56/004 , G01S5/06 , G01S11/02 , G01S13/767 , H04W56/002 , H04W64/003
Abstract: Methods, systems, and apparatus are disclosed for determining accurate ranging measurements between communication devices. Various embodiments are described for recording timestamps associated with when transmissions are sent and received between the communication devices. The communication devices are configured to determine a difference in their clock frequencies and to communicate this difference with one another. Furthermore, each of the communication devices is configured to compensate for these differences before or after the timestamps are exchanged and to send a compensation indicator of whether the compensation has been performed. If the compensation has not been performed, either of the communication devices can compensate for the clock frequency differences after receiving the timestamps based on the compensation indicator. By using compensated clock frequencies based on a single clock reference, highly accurate ranging measurements are obtained using round trip propagation time calculations.
Abstract translation: 公开了用于确定通信设备之间的精确测距测量的方法，系统和装置。 描述了用于记录与在通信设备之间发送和接收传输时相关联的时间戳的各种实施例。 通信设备被配置为确定其时钟频率的差异并且将这种差异传达给彼此。 此外，每个通信设备被配置为在交换时间戳之前或之后补偿这些差异，并且发送是否已经执行了补偿的补偿指示符。 如果没有执行补偿，则任一通信设备可以基于补偿指示符来补偿接收到时间戳之后的时钟频率差异。 通过使用基于单个时钟参考的补偿时钟频率，可以使用往返传播时间计算获得高精度的测距。
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公开(公告)号：US20140213193A1
公开(公告)日：2014-07-31
申请号：US14170027
申请日：2014-01-31
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Hongyuan Zhang , Mao Yu , Su Khiong Yong , Sudhir Srinivasa
IPC: H04W64/00
CPC classification number: H04W56/004 , G01S5/06 , G01S11/02 , G01S13/767 , H04W56/002 , H04W64/003
Abstract: Methods, systems, and apparatus are disclosed for determining accurate ranging measurements between communication devices. Various embodiments are described for recording timestamps associated with when transmissions are sent and received between the communication devices. The communication devices are configured to determine a difference in their clock frequencies and to communicate this difference with one another. Furthermore, each of the communication devices is configured to compensate for these differences before or after the timestamps are exchanged and to send a compensation indicator of whether the compensation has been performed. If the compensation has not been performed, either of the communication devices can compensate for the clock frequency differences after receiving the timestamps based on the compensation indicator. By using compensated clock frequencies based on a single clock reference, highly accurate ranging measurements are obtained using round trip propagation time calculations.
Abstract translation: 公开了用于确定通信设备之间的精确测距测量的方法，系统和装置。 描述了用于记录与在通信设备之间发送和接收传输时相关联的时间戳的各种实施例。 通信设备被配置为确定其时钟频率的差异并且将这种差异传达给彼此。 此外，每个通信设备被配置为在交换时间戳之前或之后补偿这些差异，并且发送是否已经执行了补偿的补偿指示符。 如果没有执行补偿，则任一通信设备可以基于补偿指示符来补偿接收到时间戳之后的时钟频率差异。 通过使用基于单个时钟参考的补偿时钟频率，可以使用往返传播时间计算获得高精度的测距。
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Patent Agency Ranking
公开(公告)号：US20130329720A1
公开(公告)日：2013-12-12
申请号：US13913877
申请日：2013-06-10
Applicant: Marvell World Trade Ltd.
Inventor： Mao Yu
IPC: H04W56/00
CPC classification number: H04W56/002 , H04L27/0008 , H04L27/2626 , H04L27/2647 , H04L27/2662
Abstract: Apparatuses and methods for receiving and transmitting signals are provided. A baseband processor includes receiver circuitry including single carrier receiver circuitry for demodulating a received single carrier signal and multi-carrier receiver circuitry for demodulating a received multi-carrier signal. The single carrier receiver circuitry includes a first digital interpolator, and the multi-carrier receiver circuitry includes a second digital interpolator. Symbol timing recovery is executed by adjusting an interpolation phase of the first digital interpolator or the second digital interpolator. The baseband processor also includes transmitter circuitry for encoding a signal to be transmitted. The baseband processor further includes a clock coupled to the receiver circuitry and coupled to the transmitter circuitry. The clock is configured to supply a clock signal that is processed to generate clock sampling frequencies for sending and receiving a single carrier signal and a multi-carrier signal.
Abstract translation: 提供了用于接收和发送信号的装置和方法。 基带处理器包括接收机电路，包括用于解调所接收的单载波信号的单载波接收机电路和用于解调所接收的多载波信号的多载波接收机电路。 单载波接收器电路包括第一数字内插器，并且多载波接收器电路包括第二数字内插器。 通过调整第一数字内插器或第二数字内插器的内插相位来执行符号定时恢复。 基带处理器还包括用于对要发送的信号进行编码的发射机电路。 基带处理器还包括耦合到接收机电路并耦合到发射机电路的时钟。 时钟被配置为提供被处理的时钟信号以产生用于发送和接收单载波信号和多载波信号的时钟采样频率。
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7.发明授权公开(公告)号：US09979449B2
公开(公告)日：2018-05-22
申请号：US15267957
申请日：2016-09-16
Applicant: Marvell World Trade Ltd.
Inventor： B Hari Ram , Lokesh Sundaramurthy Satrasala , Sri Varsha Rottela , Sudhir Srinivasa , Hongyuan Zhang , Chusong Xiao , Mao Yu , Yanni Chen , Yong Ma
IPC: H04Q1/20 , H04B7/0456 , H04L5/00 , H04W72/08 , H04L1/00
CPC classification number: H04B7/0456 , H04B7/0413 , H04L1/0054 , H04L5/0023 , H04W72/085
Abstract: Systems and methods for detecting data in a received multiple-input-multiple-output signal are provided. N signals are received from N respective antennas, where the received signals are associated with (i) M sets of data values, (ii) a set of symbols, and (iii) a set of carrier frequencies. The N signals are formed into a received signal vector y, and one or more transformations are performed on the received signal vector y to obtain a transformed vector. A plurality of samples are formed from the transformed vector. For samples of the plurality of samples, a data detection technique of a plurality of data detection techniques is selected. The selecting is based on at least one of a spatial stream, a symbol, and a carrier frequency associated with the given sample. The selected data detection, technique is used to detect data of the given sample.
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8.发明申请公开(公告)号：US20170117944A1
公开(公告)日：2017-04-27
申请号：US15267957
申请日：2016-09-16
Applicant: Marvell World Trade Ltd.
Inventor： B Hari Ram , Lokesh Sundaramurthy Satrasala , Sri Varsha Rottela , Sudhir Srinivasa , Hongyuan Zhang , Chusong Xiao , Mao Yu , Yanni Chen , Yong Ma
CPC classification number: H04B7/0456 , H04B7/0413 , H04L1/0054 , H04L5/0023 , H04W72/085
Abstract: Systems and methods for detecting data in a received multiple-input-multiple-output signal are provided. N signals are received from N respective antennas, where the received signals are associated with (i) M sets of data values, (ii) a set of symbols, and (iii) a set of carrier frequencies. The N signals are formed into a received signal vector y, and one or more transformations are performed on the received signal vector y to obtain a transformed vector. A plurality of samples are formed from the transformed vector. For samples of the plurality of samples, a data detection technique of a plurality of data detection techniques is selected. The selecting is based on at least one of a spatial stream, a symbol, and a carrier frequency associated with the given sample. The selected data detection, technique is used to detect data of the given sample.
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公开(公告)号：US20140241458A1
公开(公告)日：2014-08-28
申请号：US14269976
申请日：2014-05-05
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Raja Banerjea , Yong Liu , Mao Yu
CPC classification number: H04B7/0452 , H04B7/0413 , H04B7/0669 , H04L5/0023 , H04L5/0048 , H04L5/005 , H04L5/0053 , H04L25/0226 , H04W84/12
Abstract: In a method for generating a preamble of a data unit for transmission via a multiple input, multiple output (MIMO) communication channel, a first field of the preamble is generated. The first field provides a plurality of indicators to a plurality of receivers. Each one of the plurality of indicators indicates a set of a plurality of training sequences that corresponds to transmission of the data unit to a corresponding one of the plurality of receivers. The plurality of training sequences is included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted.
Abstract translation: 在通过多输入多输出（MIMO）通信信道生成用于传输的数据单元的前同步码的方法中，生成前导码的第一字段。 第一场向多个接收机提供多个指示符。 多个指示符中的每个指示符指示对应于数据单元向多个接收器中的相应一个的传输的多个训练序列的集合。 多个训练序列被包括在前导码的第二个字段中。 格式化前置码使得前导码的第一字段将在正在发送的前导码的第二字段之前被发送。
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10.发明申请METHOD AND APPARATUS FOR COMMUNICATING TIME INFORMATION BETWEEN TIME AWARE DEVICES 有权用于在时间设备之间传播时间信息的方法和装置公开(公告)号：US20130173950A1
公开(公告)日：2013-07-04
申请号：US13734753
申请日：2013-01-04
Applicant: Marvell World Trade Ltd.
Inventor： Raja Banerjea , Donald Pannell , Ken Kinwah Ho , Ken Yeung , Mao Yu
IPC: G06F1/04
CPC classification number: G06F1/12 , G06F1/04 , H04J3/0664 , H04J3/0667
Abstract: According to one embodiment, an apparatus includes a first processing unit operating according to a first clock, a second processing unit operating according to a second clock running separately from the first clock, and a synchronization controller coupled to the first communication unit and the second communication unit. The synchronization controller is configured to (i) cause the first communication unit to generate a first indication of time at which the first processing unit transmits a signal to the second processing unit, according to the first clock, (ii) cause the second processing unit to generate a second indication of time at which the second processing unit receives the signal, according to the second clock, and (iii) determine an offset between the first clock and the second clock based on the first indication of time and the second indication of time.
Abstract translation: 根据一个实施例，一种装置包括根据第一时钟操作的第一处理单元，根据与第一时钟分开运行的第二时钟操作的第二处理单元，以及耦合到第一通信单元和第二通信的同步控制器 单元。 同步控制器被配置为（i）使第一通信单元根据第一时钟产生第一处理单元向第二处理单元发送信号的时间的第一指示，（ii）使第二处理单元 根据第二时钟产生第二处理单元接收信号的时间的第二指示，以及（iii）基于时间的第一指示和第二时间的第二指示来确定第一时钟和第二时钟之间的偏移量 时间。
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