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    Peak-to-average power management in wireless local area network signaling
    121.
    发明授权
    Peak-to-average power management in wireless local area network signaling 有权

    公开(公告)号：US10292101B2

    公开(公告)日：2019-05-14

    申请号：US15588360

    申请日：2017-05-05

    Applicant: QUALCOMM Incorporated

    Inventor： Lin Yang ,  Bin Tian

    IPC: H04W52/02 ,  H04L5/00 ,  H04L27/26 ,  H04L27/34 ,  H04W84/12

    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device, such as a device in a wireless local area network, may use a radio frame structure that includes a high efficiency (HE) signal field and an HE data field for communications, for example, over shared radio frequency spectrum. One or more bits or symbols within the HE signal field may be adjusted to avoid a high peak-to-average power ratio (PAPR). In some cases, the adjustment may be to a signal A (SIG-A) or signal B (SIG-B) field. In some examples, a random bit sequence may be used for padding in a signal field. In other examples, bits may be reversed or scrambled. In yet other examples, bits may be modulated and a phase rotation may be applied to the corresponding signal.

    TRANSMITTER SCHEMES TO FACILITATE SIDE CHANNEL INFORMATION ESTIMATION
    122.
    发明申请
    TRANSMITTER SCHEMES TO FACILITATE SIDE CHANNEL INFORMATION ESTIMATION 审中-公开

    公开(公告)号：US20190116068A1

    公开(公告)日：2019-04-18

    申请号：US16136572

    申请日：2018-09-20

    Applicant: QUALCOMM Incorporated

    Inventor： Lin Yang ,  Bin Tian ,  Jialing Li Chen ,  Louay Jalloul ,  Vincent Knowles Jones, IV ,  Ning Zhang ,  Chi-Lin Su ,  Ahmad Abdulrahman Mohammed

    IPC: H04L25/02 ,  H04L27/26 ,  H04L5/00 ,  H04W72/04

    Abstract: Methods, systems, and devices for wireless communication are described. In some systems (e.g., Wi-Fi systems), a transmitting device such as an access point (AP) or mobile station (STA), may identify a number of spatial streams for a data transmission that is less than a number of transmit antennas, and may transmit a packet over a channel. In a first implementation, the packet may be formatted in a multi-user frame format, with a number of long training field (LTF) symbols equal to the number of transmit antennas. In a second implementation, the packet may be a null data packet (NDP), and the device may transmit a separate data packet. In a third implementation, the packet may be formatted in single-user frame format with a modified LTF. A receiving device may receive the packet, and may perform channel estimation and power amplifier (PA) distortion cancellation based on the received packet.

    Phase and amplitude tracking in the presence of a walking pilot signal
    130.
    发明授权
    Phase and amplitude tracking in the presence of a walking pilot signal 有权
    存在步行导频信号时的相位和幅度跟踪

    公开(公告)号：US09351176B2

    公开(公告)日：2016-05-24

    申请号：US13735937

    申请日：2013-01-07

    Applicant: Qualcomm Incorporated

    Inventor： Tao Tian ,  Sameer Vermani ,  Lin Yang ,  Albert van Zelst

    IPC: H04W24/02 ,  H04W52/02 ,  H04W72/04 ,  H04L25/02 ,  H04L25/03

    CPC classification number: H04W24/02 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03159 ,  H04W52/0209 ,  H04W72/042

    Abstract: A method and apparatus for tracking amplitude and phase of a received low frequency signal comprising a walking pilot signal is disclosed, wherein the pilot signal changes in frequency a number of times according to a sequence that repeats. The design includes initializing a FIFO buffer and summing estimated channel power over the sequence to determine an initial total power. The design also includes, for a new received symbol, determining an updated power estimate for the new received symbol, placing the updated power estimate in the FIFO buffer, and removing a least current value from the FIFO buffer, and estimating amplitude of the signal using a sum of all updated power estimates in the FIFO buffer divided by the initial total power. The design may further include determining a delta phase value using maximum ratio combining scaled with a scaling factor.

    Abstract translation: 公开了一种用于跟踪包括步行导频信号的接收低频信号的幅度和相位的方法和装置，其中导频信号根据重复的顺序频率改变多次。 该设计包括初始化FIFO缓冲器并对序列上的估计信道功率求和以确定初始总功率。 该设计还包括对于新的接收符号，确定新的接收符号的更新的功率估计，将更新的功率估计放置在FIFO缓冲器中，以及从FIFO缓冲器中去除最小电流值，以及使用 FIFO缓冲器中所有更新的功率估计值除以初始总功率的总和。 该设计可以进一步包括使用用比例因子缩放的最大比率组合来确定增量相位值。

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