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    DISTRIBUTED TRANSMISSION OF SHORT TRAINING FIELDS
    11.
    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.

    DUPLICATE TRANSMISSIONS WITH CHANNEL PUNCTURING
    12.
    发明申请
    DUPLICATE TRANSMISSIONS WITH CHANNEL PUNCTURING 审中-公开

    公开(公告)号：WO2022260783A1

    公开(公告)日：2022-12-15

    申请号：PCT/US2022/027813

    申请日：2022-05-05

    Applicant: QUALCOMM INCORPORATED

    Inventor： CHEN, Jialing Li ,  WU, Kanke ,  TIAN, Bin ,  KIM, Youhan

    IPC: 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 tone mapping techniques and physical layer convergence protocol (PLCP) protocol data unit (PPDU) designs that support duplicate (or "DUP mode") transmissions with channel puncturing. In some implementations, a wireless communication device may transmit a PPDU carrying user data over a wireless channel excluding one or more punctured subchannels, where the user data is transmitted in a DUP mode. As such, the user data may be mapped to a number (N) of tones spanning a first portion of the wireless channel and a duplicate copy of the user data may be mapped to N tones spanning a second portion of the wireless channel.

    ENHANCED SOUNDING PACKET DESIGNS
    13.
    发明申请
    ENHANCED SOUNDING PACKET DESIGNS 审中-公开

    公开(公告)号：WO2022026808A1

    公开(公告)日：2022-02-03

    申请号：PCT/US2021/043867

    申请日：2021-07-30

    Applicant: QUALCOMM INCORPORATED

    Inventor： VERMANI, Sameer ,  ASTERJADHI, Alfred ,  SUN, Yanjun ,  TIAN, Bin ,  YANG, Lin ,  CHEN, Jialing Li ,  CHERIAN, George ,  KIM, Youhan

    IPC: H04L5/00

    Abstract: This disclosure provides methods, devices and systems for generating enhanced sounding packets. Some implementations more specifically relate to sounding packet designs that support enhancements to wireless communication protocols associated with the Institute of Electrical and Electronics Engineers (IEEE) 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced null data packet announcement (NDPA) frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, the enhanced NDPA frame may be configured in accordance with a legacy or a non-legacy NDPA frame format. In some other implementations, the enhanced NDPA frame may include a subfield carrying information identifying a particular basic service set (BSS) which may be associated with one or more STA information fields. Still further, in some implementations, an Extremely High Throughput (EHT) PPDU may include signaling to indicate whether the EHT PPDU is formatted as a sounding NDP.

    DISTRIBUTED TONE MAPPING FOR POWER SPECTRAL DENSITY (PSD) LIMITS
    15.
    发明申请
    DISTRIBUTED TONE MAPPING FOR POWER SPECTRAL DENSITY (PSD) LIMITS 审中-公开

    公开(公告)号：WO2021183619A

    公开(公告)日：2021-09-16

    申请号：PCT/US2021/021660

    申请日：2021-03-10

    Applicant: QUALCOMM INCORPORATED [US]/[US]

    Inventor： YANG, Lin ,  TIAN, Bin ,  KIM, Youhan ,  JONES IV, Vincent Knowles ,  YUCEK, Tevfik

    IPC: H04L5/00 ,  H04W84/12

    Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication. An example apparatus selects a resource unit (RU) for a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU). The selected RU includes a set of contiguous tones spanning a bandwidth. The apparatus maps the set of contiguous tones to a set of non-contiguous tones distributed across the frequency spectrum, and transmits the PPDU over the set of non-contiguous tones. Another example apparatus selects an RU of a group of RUs that collectively span a frequency spectrum, and formats a PPDU based on a first frequency bandwidth wider than the selected RU's bandwidth. The apparatus parses the contiguous tones of the selected RU to a set of non-contiguous tones spanning a unique segment of a second frequency bandwidth wider than the first frequency bandwidth, and schedules a transmission of the PPDU over the set of non-contiguous tones.

    NULL-SPACE-PROJECTION-BASED CHANNEL DECOMPOSTION FOR BEAMFORMING
    17.
    发明申请
    NULL-SPACE-PROJECTION-BASED CHANNEL DECOMPOSTION FOR BEAMFORMING 审中-公开

    公开(公告)号：WO2020176413A1

    公开(公告)日：2020-09-03

    申请号：PCT/US2020/019501

    申请日：2020-02-24

    Applicant: QUALCOMM INCORPORATED

    Inventor： MANDULA, Yashwanth ,  VEMULA, Gopala Krishna Murthy ,  CHANDRASEKARAN, Suresh ,  GORE, Ashutosh Deepak ,  VENKATESH, Swaroop ,  JALLOUL, Louay ,  MOHAMMED, Ahmad Abdulrahman ,  LEE, Yen-Feng ,  PAYSARVI HOSEINI, Pedram ,  SU, Chi-Lin ,  KIM, Youhan

    IPC: H04B7/0456

    Abstract: This disclosure provides methods, devices and systems for obtaining and providing channel feedback. In some implementations, a beamformee provides channel feedback to a beamformer that enables the beamformer to construct and independently precode two or more different sets of spatial streams for transmission to the beamformee. The independent precoding of the different sets of spatial streams ensures that the decodings of the different sets of spatial streams may be decoupled from one another at the beamformee. To provide the channel feedback, the beamformee partitions a channel estimate into two or more sub-estimates prior to performing a channel decomposition. In some implementations, the beamformee determines null-space-based projections of the sub-estimates before performing the channel decomposition. The determination of the null-space-based projections enables the beamformee to perform independent decompositions of the multiple channel sub-estimates to determine multiple respective feedback matrices, which are then assembled to provide the channel feedback to the beamformer. The channel feedback is then reconstructed and disassembled by the beamformer to perform the independent precoding of the different sets of spatial streams.

    APPARATUS AND METHOD FOR SUB-CHANNEL SELECTION BASED ON A NUMBER OF ELECTRONIC DEVICES OF A WIRELESS NETWORK
    18.
    发明申请
    APPARATUS AND METHOD FOR SUB-CHANNEL SELECTION BASED ON A NUMBER OF ELECTRONIC DEVICES OF A WIRELESS NETWORK 审中-公开

    公开(公告)号：WO2019006385A1

    公开(公告)日：2019-01-03

    申请号：PCT/US2018/040423

    申请日：2018-06-29

    Applicant: QUALCOMM INCORPORATED

    Inventor： SHI, Kai ,  TIAN, Bin ,  KIM, Youhan ,  NANDA, Rashmi ,  VERMA, Lochan ,  ZHANG, Ning

    IPC: H04W72/04 ,  H04L5/00 ,  H04W84/12

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for sub-channel selection in a wireless network. In one aspect, a first message is generated at a first electronic device of a wireless network in response to a number of electronic devices of a wireless network being less than a threshold number. The first message indicates particular sub-channels of a transmission band that are to be used for a transmission in a single user (SU) mode of operation to a second electronic device of the wireless network. The method further includes sending the first message to the second electronic device. The first message indicates that a second message is to be sent to the second electronic device using the particular sub-channels. The method further includes sending the second message to the second electronic device via the transmission using the particular sub-channels.

    MULTIPLE SOUNDING CHANNEL ESTIMATION
    19.
    发明申请
    MULTIPLE SOUNDING CHANNEL ESTIMATION 审中-公开

    公开(公告)号：WO2018222409A1

    公开(公告)日：2018-12-06

    申请号：PCT/US2018/033267

    申请日：2018-05-17

    Applicant: QUALCOMM INCORPORATED

    Inventor： SU, Chi-Lin ,  KIM, Youhan ,  ZHANG, Ning

    IPC: H04B7/06

    CPC classification number: H04B7/0626 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0695

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for combining channel feedback obtained for multiple soundings and transmitting beamformed communications based on the combined channel feedback. In one aspect, a method includes transmitting, by a first wireless device, a first channel sounding using a first subset of antennas, receiving first channel feedback from a second wireless device based on the first channel sounding, transmitting a second channel sounding using a second subset of the antennas that partially overlaps with the first subset, receiving second channel feedback based on the second channel sounding, and transmitting a beamformed communication to the second wireless device based on the first and the second channel feedback.

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