Signaling phy preamble formats
    61.
    发明授权

    公开(公告)号:US10038518B1

    公开(公告)日:2018-07-31

    申请号:US15180801

    申请日:2016-06-13

    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.

    Beamforming scheme for phased-array antennas

    公开(公告)号:US09991941B1

    公开(公告)日:2018-06-05

    申请号:US14451248

    申请日:2014-08-04

    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.

    Hybrid automatic repeat request for wireless local area network

    公开(公告)号:US09876614B1

    公开(公告)日:2018-01-23

    申请号:US14600766

    申请日:2015-01-20

    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.

    Auto-detection of repeated signals
    70.
    发明授权

    公开(公告)号:US09674011B1

    公开(公告)日:2017-06-06

    申请号:US15017343

    申请日:2016-02-05

    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.

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