公开(公告)号：US11184134B2

公开(公告)日：2021-11-23

申请号：US16702369

申请日：2019-12-03

Applicant: QUALCOMM Incorporated

Inventor： Wei Yang ,  Yi Huang ,  Alexandros Manolakos ,  Wanshi Chen ,  Peter Gaal ,  Gokul Sridharan ,  Juan Montojo

IPC: H04L5/00 ,  H04B7/0456 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may identify multiple demodulation reference signal (DMRS) symbols corresponding to multiple DMRS ports of a multiple input multiple output configuration. The transmitting device may generate multiple phase-rotated and precoded DMRS symbols by applying an orthogonal cover code, a phase rotation scheme, and a precoding matrix to the identified DMRS symbols. The transmitting device may map the phase-rotated and precoded DMRS symbols to time-frequency resources corresponding to multiple antenna ports, and transmit a DMRS based on the mapped phase-rotated and precoded DMRS symbols. The transmitting device may transmit the DMRS using multiple antennas that correspond to the antenna ports.

公开(公告)号：US20210360572A1

公开(公告)日：2021-11-18

申请号：US17307796

申请日：2021-05-04

Applicant: QUALCOMM Incorporated

Inventor： Alexandros MANOLAKOS ,  Weimin Duan ,  Gokul Sridharan ,  Jay Kumar Sundararajan ,  Hwan Joon Kwon ,  Wanshi Chen ,  Krishna Kiran Mukkavilli

IPC: H04W64/00 ,  H04W28/16 ,  H04W72/04 ,  H04L5/00

Abstract: In a positioning session for a user equipment (UE), one or more base stations may receive and derive positioning measurements from uplink (UL) transmission from the UE that include a physical resource block (PRB) interlaced waveform based on at least one of interlaced physical uplink control channel (PUCCH) resource blocks, interlaced physical uplink shared channel (PUSCH) RBs resource blocks, interlaced sounding reference signal (SRS), interlaced uplink (UL) positioning reference signal (PRS), or a combination thereof. The interlaced waveforms span a greater wavelength than if interlacing were not used, and an enhanced accuracy requirement for the positioning measurements based on the span may be used for the positioning measurements. The UL interlaced PRBs may be used for UL positioning measurements for combined downlink (DL) and UL positioning measurements. The base station may report the positioning measurements along with the channel used and enhanced accuracy requirements to a location server for positioning.

公开(公告)号：US20210359731A1

公开(公告)日：2021-11-18

申请号：US17246374

申请日：2021-04-30

Applicant: QUALCOMM Incorporated

Inventor： Saeid Sahraei ,  Gokul Sridharan ,  Shimman Arvind Patel ,  Krishna Kiran Mukkavilli ,  June Namgoong ,  Taesang Yoo ,  Renqiu Wang

IPC: H04B7/0456 ,  H04B7/06 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communications are described in which a base station may identify a null space matrix that lies within a null space of an effective channel matrix for communications between the base station and a user equipment (UE). An indication of the null space matrix may be provided to the UE, and the null space matrix used to determine modifications to a precoding matrix. The base station and UE may determine a redistribution matrix that provides a reduced variance of transmission powers for a number of transmission channels, where a product of the null space matrix and the redistribution matrix may be computed and added to the precoding matrix to generate a modified precoding matrix. The modified precoding matrix may be used to generate the communications from the base station and UE with reduced power variance across channels.

公开(公告)号：US20210059005A1

公开(公告)日：2021-02-25

申请号：US16996868

申请日：2020-08-18

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Peter Pui Lok Ang ,  Gabi Sarkis ,  Gokul Sridharan ,  Tingfang Ji ,  Wooseok Nam ,  Hong Cheng ,  Junyi Li ,  Zhibin Wu

IPC: H04W76/28 ,  H04W76/11 ,  H04W80/02 ,  H04W24/08 ,  H04W52/02 ,  H04W4/40

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine one or more sidelink discontinuous reception (DRX) parameters for a configured sidelink DRX cycle. The sidelink DRX parameters may be selected by the UE or may be indicated by a base station. In some cases, the UE may transmit an indication of the sidelink DRX parameters to another UE (e.g., via a sidelink communication link). A UE may discontinuously monitor for transmissions over the sidelink communication link in accordance with the sidelink DRX parameters.

公开(公告)号：US20200044705A1

公开(公告)日：2020-02-06

申请号：US16525343

申请日：2019-07-29

Applicant: QUALCOMM Incorporated

Inventor： Gokul Sridharan ,  Jay Kumar Sundararajan ,  Yi Huang ,  Wei Yang ,  Joseph Binamira Soriaga

IPC: H04B7/0456 ,  H04L5/00 ,  H04B7/02 ,  H04B7/06 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may use multiple antenna ports to communicate with multiple transmission/reception points (TRPs), and each antenna port may correspond to a spatial dimension along which wireless communications may be transmitted. The UE may transmit a first sounding reference signal (SRS) to a serving TRP to aid the serving TRP in determining a subset of spatial dimensions available to the UE along which to transmit downlink transmissions. Upon receiving a downlink transmission from the serving TRP along the subset of spatial dimensions as determined by the serving TRP, the UE may transmit a second SRS to a neighboring TRP to indicate the subset of spatial dimensions. The neighboring TRP avoid transmitting downlink transmissions to the UE or to other UEs along the subset of spatial dimensions, thereby mitigating interference along the subset of spatial dimensions.

公开(公告)号：US20200037328A1

公开(公告)日：2020-01-30

申请号：US16523103

申请日：2019-07-26

Applicant: QUALCOMM Incorporated

Inventor： Gokul Sridharan ,  Jay Kumar Sundararajan ,  Yi Huang ,  Wei Yang ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04W72/04 ,  H04B7/0456 ,  H04B7/06

Abstract: Techniques are described herein for allocating transmit power between precoding resource groups (PRGs) and/or transmit chains of a user equipment (UE) to reduce the amount of total transmit power that is unused. The UE may determine a set of precoding scaling factors for each PRG to efficiently allocate a total transmit power between the PRGs using a two-stage approach. During a first stage, the UE may determine PRG-specific precoding scaling factors for each PRG associated with an uplink transmission. During a second stage, the UE may determine a residual precoding scaling factor to apply to all the PRGs associated with the uplink transmission and determine overall precoding scaling factors for each PRG. The second stage may be configured to refine the scaling factors determined in the first stage such that at least some of the unused transmit power is allocated to at least one of the PRGs or transmit chains.

公开(公告)号：US20200015250A1

公开(公告)日：2020-01-09

申请号：US16460064

申请日：2019-07-02

Applicant: QUALCOMM Incorporated

Inventor： Wei Yang ,  Yi Huang ,  Joseph Binamira Soriaga ,  Gokul Sridharan ,  Jay Kumar Sundararajan

IPC: H04W72/12 ,  H04W72/14 ,  H04W24/08 ,  H04W72/04 ,  H04W76/11 ,  H04W52/06 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device, such as a user equipment (UE), may receive, via a first control resource set (CORESET) of a plurality of CORESETs monitored by the UE, a first downlink grant that schedules a downlink data transmission to the UE. The UE may receive the downlink data transmission from a first transmission reception point (TRP) of a plurality of TRPs and transmit feedback information for the downlink data transmission to the first TRP based at least in part on the first TRP being associated with the first CORESET or the first downlink grant being received via the first CORESET.

公开(公告)号：US20190393931A1

公开(公告)日：2019-12-26

申请号：US16449246

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Gokul Sridharan ,  Wei Yang ,  Taesang Yoo ,  Peter Gaal

IPC: H04B7/0456 ,  H04W52/08 ,  H04B7/0491 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) having partially coherent antennas may be configured for simultaneous transmissions on groups of antennas (e.g., multiple pairs of antennas). To achieve the benefits of simultaneous transmissions using groups of antenna that are partially coherent, without having the transmissions affect each other (e.g., interference), the UE may apply a hybrid closed-loop multiple-input multiple-output (MIMO) scheme among each antenna in the antenna groups where phase coherence can be maintained. Following the hybrid closed-loop MIMO scheme, the UE may apply a transparent diversity scheme across each antenna of the groups. Alternatively, the UE may first apply the transparent diversity scheme and next apply the hybrid closed-loop MIMO scheme. By applying a hybrid closed-loop MIMO scheme, as well as a transparent diversity scheme, the UE may fully realize its resources and contribute to an improved spatial diversity for a MIMO system.

公开(公告)号：US12294406B2

公开(公告)日：2025-05-06

申请号：US17411312

申请日：2021-08-25

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Alexandros Manolakos ,  Weimin Duan ,  Gokul Sridharan ,  Jay Kumar Sundararajan ,  Muhammad Sayed Khairy Abdelghaffar ,  Naga Bhushan ,  Wanshi Chen ,  Taesang Yoo ,  Hwan Joon Kwon ,  Krishna Kiran Mukkavilli ,  Tingfang Ji

IPC: H04B1/525 ,  H04L1/00 ,  H04L5/14 ,  H04W4/02 ,  H04W4/40

Abstract: A communications transceiver system that employs self-interference mitigation techniques can detect static objects by using techniques that introduce angular or Doppler diversity. This can include moving Tx and Rx antennas and/or performing beam sweeping. When processing RF sensing data from reflected RF signals, self-interference mitigation techniques can be used and compensation can be made for the movement and/or beam sweeping to allow for both self-interference mitigation and detection of static objects.

公开(公告)号：US12256344B2

公开(公告)日：2025-03-18

申请号：US17450453

申请日：2021-10-08

Applicant: QUALCOMM Incorporated

Inventor： Hung Dinh Ly ,  Gokul Sridharan ,  Krishna Kiran Mukkavilli

IPC: H04W52/42 ,  H04L5/00 ,  H04W52/14 ,  H04W52/24 ,  H04W52/36

Abstract: A base station performs joint channel estimation for a set of physical uplink control channels (PUCCHs), where one or more PUCCHs of the set of PUCCHs comprises a corresponding DMRS from a user equipment (UE). The UE receives an indication to transmit the set of PUCCHs, one or more PUCCHs of the set of PUCCHs comprising a DMRS from the base station. The base station transmits, and the UE receives, spatial filter or power control information elements for each PUCCH of the set of PUCCHs. The UE transmits the PUCCHs comprising corresponding DMRS based on a same spatial filter with a same power control parameters, spatial filter or power control information element for a first PUCCH of the set of PUCCHs indicating the same spatial filter or same power control parameter, the set of PUCCHs having phase continuity.