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公开(公告)号：US10993243B1
公开(公告)日：2021-04-27
申请号：US16570360
申请日：2019-09-13
Applicant: Marvell International Ltd.
Inventor： Yan Zhang , Xiayu Zheng , Bo Yu , Jinjing Jiang
Abstract: A method for communicating in a wireless local area network is disclosed herein. The AP sets an uplink target received signal strength information (RSSI) for all participating stations (STAs) and transmits the information to the STAs in a trigger frame. Specifically, the AP sets the uplink target RSSIs for each STA to be within a predetermined range of each other so that when the STAs transmit respective uplink frames, those frames are received at the AP at the set uplink target RSSI.
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公开(公告)号：US10404336B1
公开(公告)日：2019-09-03
申请号：US16031693
申请日：2018-07-10
Applicant: Marvell International Ltd.
Inventor： Xiayu Zheng , Bo Yu , Hongyuan Zhang
IPC: H04B7/06 , H04B7/08 , H04L25/00 , H04B7/0456 , H04L25/02
Abstract: Embodiments described herein methods and systems for channel correlation based user detection in an uplink multiuser transmission of a multiple-input multiple-output (MIMIO) network. In some embodiments, the channel correlation based user detection may be used in 802.11 UL MUMIMO systems. For example, an access point may detect whether a client station responds to a trigger frame and then adjust a channel matrix accordingly to reflect whether the client station is responsive. The access point may then decode received data signals based on the adjusted channel matrix that reflects whether a client station has transmitted.
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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
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.
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4.发明授权公开(公告)号：US10420034B1
公开(公告)日：2019-09-17
申请号：US16005104
申请日：2018-06-11
Applicant: Marvell International Ltd.
Inventor： Xiayu Zheng , Hongyuan Zhang
Abstract: Embodiments described herein provide methods and systems for adaptively controlling uplink communications parameters of a receiving station by an access point. In some embodiments, the uplink power and/or uplink rate of a receiving station is controlled by the access point based on uplink RSSI and/or SNR measurements of uplink packets sent by the receiving station to the access point. For example, the access point may adjust a target RSSI value based on the uplink RSSI and/or SNR measurements of uplink packets in the allocated resource unit. The adjusted target RSSI value is sent to the receiving station in a trigger frame from the access point and the receiving station may then set the uplink transmission power based on the target RSSI value.
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5.发明授权Method and apparatus for performing channel estimation and equalization based on a signal field of a received packet 有权基于接收到的分组的信号字段来执行信道估计和均衡的方法和装置公开(公告)号：US09252999B1
公开(公告)日：2016-02-02
申请号：US14499953
申请日：2014-09-29
Applicant: Marvell International LTD.
Inventor： Hongyuan Zhang , Xiayu Zheng
CPC classification number: H04L25/0204 , H04L25/0228 , H04L25/03159 , H04L25/03891
Abstract: A network device including a receiver module, a first channel estimate module, and a frequency equalizer. The receiver module is configured to receive a packet wirelessly transmitted over a channel to the network device, where the packet comprises a signal field, and where the signal field (i) comprises bits, or (ii) has corresponding sub-carriers. The first channel estimate module is configured to, (i) based on the signal field, perform multiple determinations, where each of the determinations indicates whether a respective one of the bits or a respective one of the sub-carriers has been modulated with a first predetermined value or a second predetermined value, and (ii) based on the determinations, output a first estimate of the channel. The frequency equalizer is configured to (i) receive a first signal including the packet, and (ii) equalize the first signal based on the first channel estimate.
Abstract translation: 一种包括接收机模块，第一信道估计模块和频率均衡器的网络设备。 接收器模块被配置为接收通过信道无线地传输到网络设备的分组，其中分组包括信号字段，并且其中信号字段（i）包括比特，或者（ii）具有对应的子载波。 第一信道估计模块被配置为：（i）基于信号字段执行多个确定，其中每个确定指示相应的一个比特或相应的一个子载波是否已被第一个 预定值或第二预定值，以及（ii）基于所述确定，输出所述信道的第一估计。 频率均衡器被配置为（i）接收包括分组的第一信号，以及（ii）基于第一信道估计来均衡第一信号。
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Patent Agency Ranking
公开(公告)号：US11044726B1
公开(公告)日：2021-06-22
申请号：US15867501
申请日：2018-01-10
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Xiayu Zheng , Hongyuan Zhang , Hui-Ling Lou
Abstract: In a wireless communication network that operates according to a communication protocol that permits transmissions via multiple channels corresponding to multiple different frequency bandwidths, a communication device receives a packet via a first communication channel that spans a first frequency bandwidth. The communication device determines a second communication channel for transmitting an acknowledgment packet, the second communication channel spanning a second frequency bandwidth that is less than the first frequency bandwidth, the acknowledgment packet responsive to receiving the packet. The communication device transmits the acknowledgment packet via the second communication channel.
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公开(公告)号：US10136435B1
公开(公告)日：2018-11-20
申请号：US15236188
申请日：2016-08-12
Applicant: Marvell International Ltd.
Inventor： Xiayu Zheng , Bo Yu , Hongyuan Zhang
Abstract: A method for decoding an orthogonal frequency division multiplex (OFDM) data unit transmitted via an OFDM communication channel is described. A first OFDM symbol of the OFDM data unit is received at a communication device via a first sub-channel of the OFDM communication channel. A candidate OFDM symbol is detected by the communication device on a second sub-channel of the OFDM communication channel. A bandwidth of the OFDM communication channel is detected by the communication device based on the detected candidate OFDM symbol. At least one OFDM symbol of the OFDM data unit is decoded by the communication device based on the detected bandwidth.
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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
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。
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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：US10397933B1
公开(公告)日：2019-08-27
申请号：US15849213
申请日：2017-12-20
Applicant: Marvell International Ltd.
Inventor： Hua Mu , Xiayu Zheng , Hongyuan Zhang
Abstract: The present disclosure describes apparatuses and methods of interference cancellation for receivers with multiple antennas. In some aspects, an interference packet transmitted by an interfering device of a wireless environment is received via multiple antennas of a device. Based on the interference packet, an interference channel that describes interference in the wireless environment is estimated. The device then receives an intended packet through the wireless environment in which the interfering device is operating. At least a portion of interference received with the intended packet, such as interference caused by other interfering packets, is cancelled using the interference channel. By so doing, a receiver may reduce effects of interfering packets or signals of the wireless environment to improve receive performance (e.g., bit-error rate) for packets that are intended for reception by the device.
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