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公开(公告)号：US10439695B1
公开(公告)日：2019-10-08
申请号：US16014366
申请日：2018-06-21
Applicant: Marvell International Ltd.
Inventor： Hongyuan Zhang , Sudhir Srinivasa , Christian R. Berger , Xiayu Zheng
IPC: H04L5/00 , H04B7/06 , H04B7/0417 , H04B7/0456 , H04B7/0452 , H04L1/16 , H04B17/309
Abstract: Embodiments described herein provide a method for performing beamforming in a multiple-user-multiple-input-multiple-output (MUMIMO) system. At a MUMIMO access point, MUMIMO data may be received from a station of a plurality of stations. Uplink channel state information may be obtained, from the MUMIMO data, representing an uplink channel between the station and the MUMIMO access point. The uplink channel includes signals transmitted from the station using the second number of antennas. Downlink channel state information may be computed, based on the uplink channel state information, representing a downlink channel between the MUMIMO access point and the station.
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公开(公告)号：US10264544B1
公开(公告)日：2019-04-16
申请号：US15979100
申请日：2018-05-14
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Hongyuan Zhang , Hui-Ling Lou , Christian R. Berger , Niranjan Grandhe
Abstract: A first communication determines, for a null data packet (NDP) ranging measurement procedure, i) a start time, ii) a time duration of each time slot of a plurality of time slots, and iii) a time interval between adjacent time slots. The first communication device generates one or more packets that include: i) an indication of the start time, ii) an indication of the time duration, and iii) an indication of the time interval, and transmits the one or more packets to multiple second communication devices prior to the NDP ranging measurement procedure. During the NDP ranging measurement procedure, the first communication device transmits a downlink NDP transmission to a group of second communication devices, and receives an uplink multi-user NDP transmission from the group of second communication devices.
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公开(公告)号：US10158443B1
公开(公告)日：2018-12-18
申请号：US15690198
申请日：2017-08-29
Applicant: Marvell International Ltd.
Inventor： Christian R. Berger , Niranjan Grandhe , Sudhir Srinivasa
Abstract: The present disclosure describes methods and apparatuses for fine timing measurement with frequency domain processing. In some aspects, a first device receives a frame that is transmitted by a second device via a wireless medium. A degree to which the frame is affected by multipath propagation in the wireless medium is determined based on frequency power and linear phase of the frame, which can be calculated using frequency domain processing. Based on the degree to which the frame is affected, a time of arrival calculation for the frame can be compensated for effects related to the multipath propagation. By so doing, the effects of multipath propagation can be addressed without time domain processing, which is typically complex and more expensive to implement.
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4.发明授权Channel processing with dedicated pilots utilizing information from broadcast pilots 有权使用来自广播飞行员的信息的专用飞行员进行信道处理公开(公告)号：US09325395B1
公开(公告)日：2016-04-26
申请号：US14042788
申请日：2013-10-01
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Mingguang Xu , Yakun Sun , Christian R. Berger
CPC classification number: H04L25/067 , H04B7/0413 , H04L1/0618 , H04L1/20 , H04L25/0222 , H04L25/0234 , H04L25/0256 , H04L25/03038
Abstract: Systems, methods, and other embodiments associated with channel processing with dedicated pilots utilizing information from broadcast pilots are described. According to one embodiment, an method includes receiving, through a channel, i) a signal resource block that includes data and a dedicated pilot that is precoded and ii) at least one broadcast pilot that is not precoded. A channel property is deduced from the broadcast pilot; and the channel is processed by applying the channel property to the dedicated pilot. In one embodiment, the method includes estimating an effective channel by applying the channel property to the dedicated pilot.
Abstract translation: 描述了利用来自广播导频的信息的专用导频与信道处理相关联的系统，方法和其它实施例。 根据一个实施例，一种方法包括：通过信道接收i）包括预编码的数据和专用导频的信号资源块，以及ii）未被预编码的至少一个广播导频。 从广播飞行员推断频道属性; 并且通过将信道属性应用于专用导频来处理信道。 在一个实施例中，该方法包括通过将信道属性应用于专用导频来估计有效信道。
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5.发明授权System and method for estimating noise in a wireless signal using order statistics in the time domain 有权使用时域中的顺序统计来估计无线信号中的噪声的系统和方法公开(公告)号：US09277421B1
公开(公告)日：2016-03-01
申请号：US14558770
申请日：2014-12-03
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Vladan Petrovic , Christian R. Berger , Zhipei Chi
CPC classification number: H04W24/00 , H04B1/1036 , H04B15/00 , H04B17/354 , H04W52/225
Abstract: Systems, methods, and other embodiments associated with estimating noise in a receiver device based on related properties of order statistics are described. According to one embodiment, a method includes generating an initial set of magnitude squared values from a time domain impulse response of a receiver device. The method also includes generating an initial noise power estimate based on a modified set of magnitude squared values and generating a threshold value based on the initial noise power estimate. The method generates a final noise power estimate by averaging values of the initial set of magnitude squared values that are less than the threshold value and removing a thresholding bias from the resulting average.
Abstract translation: 描述了基于订单统计的相关属性来估计接收机设备中的噪声的系统，方法和其它实施例。 根据一个实施例，一种方法包括从接收机设备的时域脉冲响应生成初始的幅度平方值集合。 该方法还包括基于经修改的幅度平方值的值生成初始噪声功率估计，并且基于初始噪声功率估计生成阈值。 该方法通过平均小于阈值的初始的幅度平方值的值来产生最终噪声功率估计，并从所得到的平均值中去除阈值偏差。
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Patent Agency Ranking
公开(公告)号：US10890644B1
公开(公告)日：2021-01-12
申请号：US16046108
申请日：2018-07-26
Applicant: Marvell International Ltd.
Inventor： Christian R. Berger , Niranjan Grandhe , Sudhir Srinivasa
Abstract: At a receiver in a short-range wireless system having a plurality of channels and a plurality of receiving antennas, an angle-of-arrival of a signal is determined by receiving, at at least two antennas, the signal on one of the channels, determining a phase difference between the signal as received at those antennas, removing a local oscillator phase from the phase difference to provide an adjusted phase difference, and determining, from the adjusted phase difference, the angle-of-arrival. Removing the local oscillator phase includes estimating a local oscillator phase for each channel to be used for all antennas, or determining an angle using multi-channel combining, and for each channel, using that angle to determine a channel local oscillator phase, or, for a given channel, identifying, as the local oscillator phase, a phase that minimizes the sum, over all antennas, of squares of phase differences between the given channel and a neighboring channel.
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公开(公告)号：US10476539B1
公开(公告)日：2019-11-12
申请号：US16046114
申请日：2018-07-26
Applicant: Marvell International Ltd.
Inventor： Christian R. Berger , Niranjan Grandhe , Sudhir Srinivasa
Abstract: Adjusting automatic gain control of a receiver, in a short-range wireless system having a plurality of channels and a plurality of receiving antennas, includes setting initial gain to be set by receiver AGC based on signals received at a receiver reference antenna, receiving, at each of the receiving antennas, a signal on a current channel, and adjusting gain to be set by AGC for the signal to prevent saturation. Angle-of-arrival estimation may be performed following adjusting of the AGC. Adjusting AGC may include backing off the AGC, changing the reference antenna prior to deriving gain to be set by AGC, or determining gain to be set by AGC at additional receiving antennas, and for each antenna that is not the reference antenna and is not one of the additional antennas, selecting gain to be set by AGC from a closest one of the reference antenna and the additional antennas.
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公开(公告)号：US09094080B1
公开(公告)日：2015-07-28
申请号：US14133282
申请日：2013-12-18
Applicant: Marvell International Ltd.
Inventor： Mingguang Xu , Yakun Sun , Christian R. Berger , Hui-Ling Lou
IPC: H04L25/02 , H04B1/10 , H04B17/364 , H04B17/318
CPC classification number: H04B17/318 , H04B17/364 , H04L25/0212 , H04L25/0216 , H04L25/0228
Abstract: Systems and methods are provided for processing a signal using simplified channel statistics. In an example implementation, a channel profile for a multipath channel is estimated by detecting, within a given range, a number of channel taps associated with a channel impulse response, and assigning each of those channel taps a uniform amplitude value corresponding to a constant signal strength. A signal may be received through the multipath channel and filtered based on the estimated channel profile.
Abstract translation: 提供了使用简化的信道统计来处理信号的系统和方法。 在示例实现中，通过在给定范围内检测与信道脉冲响应相关联的信道抽头的数量来估计用于多径信道的信道简档，并且将这些信道抽头中的每一个分配给对应于恒定信号的均匀幅度值 强度。 可以通过多路径信道接收信号并且基于估计的信道简档进行滤波。
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9.发明授权公开(公告)号：US09048917B1
公开(公告)日：2015-06-02
申请号：US13959498
申请日：2013-08-05
Applicant: Marvell International Ltd.
Inventor： Krishna Srikanth Gomadam , Yakun Sun , Raphael Cendrillon , Christian R. Berger , Hui-Ling Lou
IPC: H04B1/10 , H04L25/02 , H04L5/00 , H04L25/03 , H04L1/02 , H04L1/06 , H04B7/02 , H04B7/04 , H04W52/24
CPC classification number: H04B17/345 , H04B1/1027 , H04B7/024 , H04B7/04 , H04B7/0413 , H04L1/02 , H04L1/0631 , H04L5/0023 , H04L25/0204 , H04L25/0206 , H04L25/021 , H04L25/024 , H04L25/0242 , H04L25/0248 , H04L25/0328 , H04L25/03292 , H04L25/03891 , H04L25/03993 , H04W52/24
Abstract: The present disclosure includes systems and techniques relating to processing received spatially diverse transmissions. In some implementations, an apparatus includes: circuitry configured to receive signals from separate communication inputs; circuitry configured to filter the signals to reduce noise, interference, or both; circuitry configured to estimate covariance of the separate communication inputs, including estimating a correlation between the separate communication inputs; and circuitry configured to apply the covariance estimation to the filtering circuitry to effect noise whitening and to force an underestimation of the correlation between the separate communication inputs as applied.
Abstract translation: 本公开包括与处理接收到的空间不同的传输有关的系统和技术。 在一些实施方式中，一种装置包括：被配置为从单独的通信输入接收信号的电路; 被配置为过滤信号以减少噪声，干扰或两者的电路; 被配置为估计所述单独通信输入的协方差的电路，包括估计所述单独的通信输入之间的相关性; 以及电路，被配置为将所述协方差估计应用于所述滤波电路以实现噪声白化，并且强制低估所应用的分离的通信输入之间的相关性。
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10.发明授权公开(公告)号：US08964911B1
公开(公告)日：2015-02-24
申请号：US13684005
申请日：2012-11-21
Applicant: Marvell International Ltd.
Inventor： Yakun Sun , Raphael Cendrillon , Mingguang Xu , Hui-Ling Lou , Christian R. Berger , Yan Zhang
CPC classification number: H04J11/0036
Abstract: Systems, methods, apparatus, and techniques are provided for receiving signals over a communications channel, generating a plurality of successive estimates of instantaneous interference present in the communications channel at a respective plurality of samples based on the received signals, producing an average interference estimate of the interference channel based on the plurality of successive estimates, and producing a decoded codeword based on i) the average interference estimate and ii) the received signals.
Abstract translation: 提供系统，方法，装置和技术用于通过通信信道接收信号，基于接收到的信号，在相应的多个样本上产生存在于通信信道中的瞬时干扰的多个连续估计，产生平均干扰估计 所述干扰信道基于所述多个连续估计，并且基于i）所述平均干扰估计并且ii）所接收的信号来产生解码码字。
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