公开(公告)号：US10038518B1

公开(公告)日：2018-07-31

申请号：US15180801

申请日：2016-06-13

Applicant: Marvell International Ltd.

Inventor： Yakun Sun ,  Hongyuan Zhang

IPC: H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04W88/06

CPC classification number: H04L1/0007 ,  H04L1/0025 ,  H04L27/2602 ,  H04W88/06

Abstract: A communication device determines a format according to which a physical layer (PHY) data unit is to be generated. The communication device selects i) length information to be included in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble, wherein the length information and the phase of modulation are selected to indicate the format from a set of multiple PHY formats defined by a communication protocol. The communication device generates the PHY data unit to include the selected length information in the field in the legacy portion of the PHY preamble and to modulate the OFDM symbol in the non-legacy portion of the PHY preamble with the selected phase, and transmits the PHY data unit.

公开(公告)号：US09991941B1

公开(公告)日：2018-06-05

申请号：US14451248

申请日：2014-08-04

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04B7/06 ,  H04B7/0417 ,  H01Q3/40 ,  H01Q3/26

CPC classification number: H04B7/0617 ,  H01Q3/2605 ,  H01Q3/40 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/088

Abstract: A plurality of received signals are received at a first communication device, the plurality of received signals corresponding to at least one training signal having been transmitted by a second communication device a plurality of times via a plurality of antennas by the second communication device applying a respective antenna weight vector from a plurality of different antenna weight vectors each time the at least one training signal is transmitted. The first communication device generates a transmitter antenna weight vector based on a mathematical combination of at least i) the plurality of received signals, ii) the antenna weight vectors applied by the second communication device when transmitting the at least one training signal the plurality of times, and iii) the at least one training signal. The first communication device transmits the transmitter antenna weight vector to the second communication device.

公开(公告)号：US09974040B1

公开(公告)日：2018-05-15

申请号：US15419499

申请日：2017-01-30

Applicant: Marvell International Ltd.

Inventor： Liwen Chu ,  Sagar Tamhane ,  Sarang Shrikrishna Wagholikar ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04B7/00 ,  H04W56/00 ,  H04W8/00 ,  H04W84/20

CPC classification number: H04W56/007 ,  H04W8/005 ,  H04W56/0015 ,  H04W84/20

Abstract: While a peer-to-peer (P2P) wireless network that includes both i) a first communication device and ii) a second communication device is not formed, and prior to the first communication device and the second communication device performing a group owner (GO) negotiation in connection with forming the P2P wireless network, the first communication device performs a ranging exchange with the second communication device. After performing the ranging exchange with the second communication device, the first communication device performs a GO negotiation with the second communication device.

公开(公告)号：US09929882B1

公开(公告)日：2018-03-27

申请号：US14501655

申请日：2014-09-30

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Sudhir Srinivasa

IPC: H04B7/06 ,  H04B7/08 ,  H04B1/18 ,  H04W56/00 ,  H04L25/02 ,  H04L12/26

CPC classification number: H04L25/0202 ,  H04L25/022 ,  H04L25/0222 ,  H04L43/08 ,  H04W56/00

Abstract: A receiver for a wireless device. A channel estimation module is configured to calculate a first channel estimate on a first tone of a data packet and calculate a second channel estimate on a second tone of the data packet. A phase roll estimation module is configured to calculate a conjugate of the second channel estimate and calculate, using the first channel estimate and the conjugate of the second channel estimate, an estimate of a phase roll caused by an error in symbol timing of the data packet. The phase roll corresponds to a difference between phases across adjacent tones of the data packet. The phase roll estimation module is further configured to calculate, based on the estimate of the phase roll, a timing advance to be applied to the symbol timing of the data packet. The timing advance corresponds to a number of samples of the data packet.

公开(公告)号：US09876614B1

公开(公告)日：2018-01-23

申请号：US14600766

申请日：2015-01-20

Applicant: Marvell International Ltd.

Inventor： Yakun Sun ,  Liwen Chu ,  Hongyuan Zhang ,  Sudhir Srinivasa ,  Hui-Ling Lou

IPC: H04L1/18 ,  H04L1/16 ,  H04L27/26 ,  H04L5/00 ,  H04W84/12 ,  H04W84/02

CPC classification number: H04L1/1812 ,  H04L1/1664 ,  H04L1/1867 ,  H04L5/0055 ,  H04L27/2602 ,  H04L27/2607 ,  H04W84/025 ,  H04W84/12

Abstract: A method for transmission of media access control (MAC) protocol data units (MPDUs) over a wireless local area network (WLAN) communication channel is described. A first physical layer (PHY) data unit is generated at a first communication device. The first PHY data unit has i) a data field that includes a first MPDU to be transmitted to a second communication device, and ii) a PHY signal field that includes a transmission version field set to indicate an initial transmission of the first MPDU. The first PHY data unit is transmitted over the WLAN communication channel to the second communication device. It is determined, at the first communication device, whether a first acknowledgment to the first MPDU has been received from the second communication device. In response to determining that the first acknowledgment has not been received, a second PHY data unit is generated at the first communication device. The second PHY data unit has i) a data field that includes the first MPDU, and ii) a PHY signal field that includes a transmission version field set to indicate a retransmission of the first MPDU. The second PHY data unit is transmitted over the WLAN communication channel to the second communication device.

公开(公告)号：US09860823B2

公开(公告)日：2018-01-02

申请号：US14755222

申请日：2015-06-30

Applicant: Marvell International LTD.

Inventor： Raja Banerjea ,  Hongyuan Zhang

IPC: H04W48/06 ,  H04W72/04 ,  H04W48/08 ,  H04L27/26 ,  H04W84/12 ,  H04W72/12

CPC classification number: H04W48/06 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2692 ,  H04W48/08 ,  H04W72/0446 ,  H04W72/1257 ,  H04W72/1278 ,  H04W84/12

Abstract: An access point including a transceiver having first and second physical layers to communicate at first and second data rates, respectively. The transceiver receives a request from a first client station to reserve first or second sub-channel of a channel for transmitting data at the first or second data rate. In response to receiving the request from the first client station, the transceiver transmits a response to allow the first client station to transmit data and prevent a second client station from transmitting data while the first client station transmits data to the access point. In response to the first client station receiving the response, the first physical layer receives data from the first client station without interference from the second client station.

公开(公告)号：US09780857B1

公开(公告)日：2017-10-03

申请号：US15180235

申请日：2016-06-13

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Ying-Cheng Lee ,  Timothy J. Donovan ,  Dharmesh B. Bhagatwala ,  Ken Kinwah Ho ,  Hongyuan Zhang ,  Rohit U. Nabar ,  Tsunglun Yu

IPC: H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0617 ,  H04B7/046 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0689 ,  H04B7/0871

Abstract: Systems, methods, and other embodiments associated with a hybrid beamforming architecture are described. According to one embodiment, an apparatus comprises a beamforming architecture including a baseband unit and a processor. The beamforming architecture is configured to determine a steering matrix based on at least the baseband unit and the processor; and wherein the beamforming architecture is configured to simultaneously support a plurality of beamformee client devices, each beamformee client device beamformed by a beamformer with at least one of a beamformer hardware mode and a beamformer software mode and with at least one of a beamformer explicit mode and a beamformer implicit mode.

公开(公告)号：US09706599B1

公开(公告)日：2017-07-11

申请号：US13689183

申请日：2012-11-29

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Raja Banerjea ,  Yong Liu

IPC: H04L12/28 ,  H04W84/12 ,  H04J11/00

CPC classification number: H04W84/12 ,  H04J11/0026 ,  H04L27/2602 ,  H04L27/2613

Abstract: A preamble, a first portion of a data payload, a midamble, and a second portion of the data payload of a single data unit are generated. The midamble is to be transmitted subsequent to transmission of the first portion of the data payload and prior to transmission of the second portion of the data payload. The midamble includes an indication of at least one characteristic of the data payload such as an indication of a size of the second portion of the data payload, or whether or not the data payload includes one or more other portions in addition to the first and second portions. A network interface of a communication device is configured to generate the preamble, the first and second portions of the data payload, and the midamble.

公开(公告)号：US09693261B1

公开(公告)日：2017-06-27

申请号：US14563176

申请日：2014-12-08

Applicant: Marvell International LTD.

Inventor： Liwen Chu ,  Hongyuan Zhang

IPC: H04L27/26 ,  H04J11/00 ,  H04L5/00 ,  H04W40/00 ,  H04W28/06 ,  H04W84/12

CPC classification number: H04W28/065 ,  H04L1/0028 ,  H04L5/0007 ,  H04L5/0025 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0091 ,  H04L27/00 ,  H04W84/12

Abstract: A first network device including a physical layer (PHY) module and a medium access control (MAC) module. The MAC module, in a sub-1 GHz band, transmits the capabilities element to a second network device. The capabilities element includes: a multi-bit field indicating whether transmission of a packet with a traveling pilot is supported by the first network device; or a field indicating whether transmission of a spatial stream over a 1 MHz channel to the second network device is supported by the first network device. The MAC module, subsequent transmitting the capabilities element, forwards data to the PHY module. The PHY module: generates the packet to include the data, where the packet includes the traveling pilot if the capabilities element indicates transmission of the packet with the traveling pilot is supported; and according to the capabilities element, transmits the packet to the second network device via the spatial stream.

公开(公告)号：US09674011B1

公开(公告)日：2017-06-06

申请号：US15017343

申请日：2016-02-05

Applicant: Marvell International Ltd.

Inventor： Yakun Sun ,  Mingguang Xu ,  Hongyuan Zhang

IPC: H04L25/03 ,  H04W84/12

CPC classification number: H04L25/03171 ,  H04L25/03012 ,  H04L25/061

Abstract: Systems and techniques relating to repeated signal detection are described. A described technique includes receiving a signal including a first portion and a second portion, the first portion including a first received symbol and a second received symbol; detecting whether the first received symbol is repeated as the second received symbol using a maximum a posterior decision metric including a first component and a second component, the first component contributing to the decision metric in accordance with the first received symbol being repeated as the second received symbol, and the second component contributing to the decision metric in accordance with the first received symbol not being repeated as the second received symbol; determining a format based on whether or not the first received symbol was repeated; and processing the second portion of the signal in accordance with the format, as determined.