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    LONG TRAINING FIELD (LTF) IN DISTRIBUTED TRANSMISSION
    1.
    发明申请
    LONG TRAINING FIELD (LTF) IN DISTRIBUTED TRANSMISSION 审中-公开

    公开(公告)号：WO2023059403A1

    公开(公告)日：2023-04-13

    申请号：PCT/US2022/041076

    申请日：2022-08-22

    Applicant: QUALCOMM INCORPORATED

    Inventor： YANG, Lin ,  TIAN, Bin ,  CHEN, Qifan ,  KIM, Youhan

    IPC: H04L27/26 ,  H04L5/00 ,  H04L27/2613 ,  H04L27/262 ,  H04L27/2621 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0069 ,  H04W52/286

    Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.

    DISTRIBUTED TRANSMISSION OF SHORT TRAINING FIELDS
    2.
    发明申请
    DISTRIBUTED TRANSMISSION OF SHORT TRAINING FIELDS 审中-公开

    公开(公告)号：WO2023019059A1

    公开(公告)日：2023-02-16

    申请号：PCT/US2022/074080

    申请日：2022-07-22

    Applicant: QUALCOMM INCORPORATED

    Inventor： YANG, Lin ,  TIAN, Bin ,  KIM, Youhan ,  CHEN, Qifan

    IPC: H04L27/26

    Abstract: This disclosure provides methods, devices and systems for distributed transmission of short training fields in a power spectral density limited frequency band. In one aspect, a device receives a distributed resource unit (dRU) assignment for transmission of a dRU portion of a physical layer protocol data unit (PPDU); determines a spatial stream global cyclic shift delay (CSD) index for an short training field (STF) of the dRU portion of the PPDU; and transmits, based on the spatial stream global CSD index, the EHT of the dRU portion of the PPDU across a dRU spreading bandwidth associated with the dRU assignment using a tone plan and sequence corresponding to a regular resource unit (rRU) transmission mode.

    METHOD AND APPARATUS FOR DETERMINING DISTANCE IN A WI-FI NETWORK
    3.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING DISTANCE IN A WI-FI NETWORK 审中-公开
    用于确定WI-FI网络中的距离的方法和设备

    公开(公告)号：WO2013074424A1

    公开(公告)日：2013-05-23

    申请号：PCT/US2012/064524

    申请日：2012-11-09

    Applicant: QUALCOMM INCORPORATED

    Inventor： CHEN, Qifan ,  SHI, Kai ,  ZHANG, Ning

    IPC: H04W64/00 ,  G01S5/02 ,  H04J3/06

    CPC classification number: H04W24/08 ,  G01S7/40 ,  G01S13/765 ,  H04J3/0667

    Abstract: A method and apparatus for improving the accuracy of a round trip time (RTT) estimate between a first device and a second device are disclosed. The method involves calculating an acknowledgement correction factor and a unicast correction factor. These correction factors are used to compensate for symbol boundary time errors resulting from multipath effects.

    Abstract translation: 公开了一种用于提高第一设备和第二设备之间的往返时间（RTT）估计的准确性的方法和设备。 该方法涉及计算确认校正因子和单播校正因子。 这些校正因子用于补偿多径效应导致的符号边界时间误差。

    GLOBAL CYCLIC SHIFT DELAYS FOR DISTRIBUTED TRANSMISSIONS
    7.
    发明申请
    GLOBAL CYCLIC SHIFT DELAYS FOR DISTRIBUTED TRANSMISSIONS 审中-公开

    公开(公告)号：WO2023064039A1

    公开(公告)日：2023-04-20

    申请号：PCT/US2022/041109

    申请日：2022-08-22

    Applicant: QUALCOMM INCORPORATED

    Inventor： YANG, Lin ,  TIAN, Bin ,  KIM, Youhan ,  CHEN, Qifan

    IPC: H04L5/00 ,  H04L27/26

    Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.

    PILOT TONES IN DISTRIBUTED RESOURCE UNIT (DRU) TRANSMISSION
    8.
    发明申请
    PILOT TONES IN DISTRIBUTED RESOURCE UNIT (DRU) TRANSMISSION 审中-公开

    公开(公告)号：WO2023009285A1

    公开(公告)日：2023-02-02

    申请号：PCT/US2022/036264

    申请日：2022-07-06

    Applicant: QUALCOMM INCORPORATED

    Inventor： YANG, Lin ,  TIAN, Bin ,  KIM, Youhan ,  CHEN, Qifan

    IPC: H04L5/00 ,  H04L27/26

    Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to pilot tone designs that support distributed transmission. A transmitting device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical RU associated with the legacy tone plan and may further map the M tones to M noncontiguous subcarrier indices associated with a wireless channel. The transmitting device may transmit the PPDU, over the wireless channel, with a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices. In some implementations, the relative locations of the N pilot tones may be different than relative locations of a number (K) of pilot tones associated with the logical RU.

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