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公开(公告)号：US12218884B2
公开(公告)日：2025-02-04
申请号：US17503215
申请日：2021-10-15
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Youhan Kim , Qifan Chen
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.
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公开(公告)号：US12101148B2
公开(公告)日：2024-09-24
申请号：US17738892
申请日：2022-05-06
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Alfred Asterjadhi , Youhan Kim
CPC classification number: H04B7/0617 , H04B7/0619 , H04W84/12
Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to BSS discovery and association techniques that support wireless communications on carrier frequencies above 7 GHz. In some aspects, an access point (AP) may communicate using beamforming on a wireless communication link operating at a carrier frequency above 7 GHz (the “directional link”) while offloading the BSS discovery and association procedures needed to support such communications onto a wireless communication link operating at a carrier frequency below 7 GHz (the “anchor link”). In some implementations, the AP may perform a beamforming training operation with a STA over the directional link upon associating with the STA over the anchor link. In such implementations, the AP may communicate with the STA over the directional link using a beam derived from the beamforming training operation.
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公开(公告)号：US12052192B2
公开(公告)日：2024-07-30
申请号：US17402475
申请日：2021-08-13
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Youhan Kim , Qifan Chen
CPC classification number: H04L5/0048 , H04W52/18
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.
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公开(公告)号：US11996920B2
公开(公告)日：2024-05-28
申请号：US17942006
申请日：2022-09-09
Applicant: QUALCOMM Incorporated
Inventor： Abhishek Pramod Patil , George Cherian , Yanjun Sun , Lin Yang , Gaurang Naik , Abdel Karim Ajami , Alfred Asterjadhi , Sai Yiu Duncan Ho
CPC classification number: H04B7/0617 , H04B7/0695 , H04W24/02 , H04W28/0278
Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device (e.g., station (STA), access point (AP)) may transmit to a second wireless device during a service period, an initiating frame using a transmit beam that is based on a first beam training procedure performed between the devices prior to the service period. The first wireless device may perform a second beam training procedure during the service period based on an absence of a response frame from the second wireless device, based on an indication within the response frame received from the second wireless device, or based on identification of a change in a wireless channel relative to a previous beam training interval or previous service period. The first wireless device may then communicate one or more messages with the second wireless device using one or more beams that are based on the second beam training procedure.
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公开(公告)号：US11956743B2
公开(公告)日：2024-04-09
申请号：US18062839
申请日：2022-12-07
Applicant: QUALCOMM Incorporated
Inventor： Sameer Vermani , Bin Tian , Lin Yang , Jialing Li Chen
CPC classification number: H04W56/0015 , H04W92/20
Abstract: This disclosure provides systems, methods, apparatus, and computer programs encoded on computer storage media, for relative timing drift correction for distributed multi-user transmissions. In one aspect, a first access point (AP) may receive a first signal from a second AP. The first signal may be associated with a channel sounding procedure to be performed substantially simultaneously by the second AP and the first AP. The first AP may then receive a second signal from the second AP, and prior to a substantially simultaneous transmission by the second AP and the first AP. The second signal may include timing information relative to the first signal. The first AP may determine a start time of the substantially simultaneous transmission at the first AP based on the timing information, and may initiate the substantially simultaneous transmission according to the determined start time.
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Patent Agency Ranking
公开(公告)号：US11902191B2
公开(公告)日：2024-02-13
申请号：US17089303
申请日：2020-11-04
Applicant: QUALCOMM Incorporated
IPC: H04L5/00 , H04W72/0453 , H04W72/1263
CPC classification number: H04L5/0048 , H04W72/0453 , H04W72/1263
Abstract: This disclosure provides methods, devices and systems for configuring tones for a distributed resource unit (RU) across a channel bandwidth to improve frequency diversity and available transmit power. A distributed RU may include a set of tones that may be allocated across a bandwidth that is greater than a bandwidth of the aggregate quantity of tones. The set of tones may include a set of data tones grouped into contiguous groups of one or more data tones and a set of non-contiguous pilot tones. The data tones may be mapped to useful tones over a center portion of a half-bandwidth of the channel. The pilot tones may be mapped near edge tones at edges of the channel bandwidth or near direct current tones at a center of the channel bandwidth. A system bandwidth may include one or more channel bandwidths associated with distributed RUs.
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公开(公告)号：US11818698B2
公开(公告)日：2023-11-14
申请号：US17322097
申请日：2021-05-17
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Youhan Kim
IPC: H04W72/0453 , H04L5/00 , H04W52/34
CPC classification number: H04W72/0453 , H04L5/0044 , H04W52/346
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 physical layer (PHY) convergence protocol (PLCP) protocol data unit (PPDU) designs that support distributed transmission. In some implementations, a PPDU may be generated based on one or more legacy tone plans. In such implementations, a portion of the PPDU may be modulated on a number (M) of tones representing a logical RU, and the M tones may be further mapped to M noncontiguous subcarrier indices in accordance with a distributed tone plan. In some other implementations, a PPDU may be generated based on a distributed tone plan. In such implementations, a portion of the PPDU may be modulated on a number (M) of tones coinciding with M noncontiguous subcarrier indices in accordance with the distributed tone plan.
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公开(公告)号：US11805431B2
公开(公告)日：2023-10-31
申请号：US17092702
申请日：2020-11-09
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Stephen Jay Shellhammer , Dung Ngoc Doan , Sameer Vermani , Jialing Li Chen
CPC classification number: H04W24/08 , H04L27/2627 , H04W84/12
Abstract: This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.
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9.发明授权公开(公告)号：US11800467B2
公开(公告)日：2023-10-24
申请号：US17943677
申请日：2022-09-13
Applicant: QUALCOMM Incorporated
Inventor： Lochan Verma , Bin Tian , Sameer Vermani , Lin Yang
CPC classification number: H04W56/001 , H04J3/067 , H04L5/0044 , H04L27/2602 , H04L27/2605 , H04L27/2613 , H04L69/28 , H04L27/26035 , H04W88/08
Abstract: This disclosure provides systems, methods, apparatus, including computer programs encoded on computer storage media for orthogonal multiplexing of high efficiency (HE) and extremely high throughput (EHT) wireless traffic. Devices in a wireless local area network (WLAN) may operate under HE or EHT conditions. An access point (AP) may support both HE and EHT communications with WLAN devices. To enable substantially simultaneous downlink HE and EHT transmissions and substantially simultaneous uplink HE and EHT transmissions, the AP may support orthogonal frequency-division multiple access (OFDMA) of HE and EHT transmissions. For example, pre-HE and pre-EHT modulated fields, HE and EHT modulated fields, and payloads may be aligned in time for the HE and EHT transmissions. The AP may ensure orthogonality for multiplexing the HE and EHT transmissions based on the alignment. In some implementations, a trigger frame may be utilized to indicate uplink transmission alignments.
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公开(公告)号：US11637723B2
公开(公告)日：2023-04-25
申请号：US17097812
申请日：2020-11-13
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 , H04W72/04 , H04L5/00 , H04W72/044
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.
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