公开(公告)号：US20240340049A1

公开(公告)日：2024-10-10

申请号：US18264870

申请日：2021-04-09

Applicant: QUALCOMM Incorporated

Inventor： Rui Hu ,  Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Min Huang ,  Qiaoyu Li ,  Wei Xi ,  Kangqi Liu ,  Chao Wei ,  Hao Xu

IPC: H04B7/06

CPC classification number: H04B7/061

Abstract: Aspects of the disclosure relate to the generation of channel state reports and precoding a wireless transmission based on frequency division duplex (FDD) reciprocity. A base station (B S) uses at least two precoders to transmit signals to A user equipment (UE). The UE generates a set of channel state reports, in which the UE transmits a first set of channel coefficients using a first timing, a set of port attributes using a second timing, and a second set of channel coefficients using a third timing. The first set of channel coefficients correspond to a first precoded portion of the wireless transmission, and the set of port attributes and the second set of channel coefficients correspond to a second portion of the wireless transmission. The BS modifies at least one of the precoders based on the channel state reports. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20230328568A1

公开(公告)日：2023-10-12

申请号：US18043345

申请日：2020-09-11

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Chenxi Hao ,  Yu Zhang ,  Min Huang ,  Qiaoyu Li ,  Rui Hu ,  Kangqi Liu ,  Wei Xi ,  Hao Xu ,  Wanshi Chen

IPC: H04W24/10 ,  H04W24/08

CPC classification number: H04W24/10 ,  H04W24/08

Abstract: Aspects of the disclosure relate to the generation of channel state reports. A base station transmits a reference signal over a plurality of ports. A user equipment (UE) receives the reference signal and measure amplitudes of the reference signal over a plurality of ports. A first subgroup of the plurality of ports and a second subgroup of the plurality of ports are determined. In embodiments, the port groupings may be determined by the base station, which transmits an identification of the groupings to the user equipment. Alternatively, the UE may determine the port groupings. After determining the port groupings, the UE separately quantizes and normalizes the measured amplitude values in each port grouping. The UE may also separately quantize and normalize the phase measurements in each port groups. The UE generates a channel state report based on the normalized and quantized amplitude and phase values.

公开(公告)号：US20230275703A1

公开(公告)日：2023-08-31

申请号：US18003381

申请日：2021-08-26

Applicant: QUALCOMM INCORPORATED

Inventor： Kangqi Liu ,  Liangming Wu ,  Yu Zhang ,  Chao Wei ,  Changlong Xu ,  Chenxi Hao ,  Min Huang ,  Qiaoyu Li ,  Hao Xu ,  Wei Xi ,  Rui Hu

IPC: H04L1/1822 ,  H04L1/00 ,  H04W72/232 ,  H04W72/11

CPC classification number: H04L1/1822 ,  H04L1/0075 ,  H04W72/232 ,  H04W72/11

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a downlink control information (DCI) comprising a grant scheduling a data transmission for the UE, the data transmission associated with a rateless coding scheme. The UE may determine to disable feedback information for the data transmission based at least in part on the rateless coding scheme and one or more of: the DCI, a resource associated with the DCI, or a semi-persistent scheduling configuration associated with the data transmission. The UE may perform or monitor for the data transmission according to the DCI and the rateless coding scheme. The UE may perform or monitor for the feedback information for the data transmission according to the determining.

公开(公告)号：US20230170963A1

公开(公告)日：2023-06-01

申请号：US18005939

申请日：2020-09-09

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Chenxi Hao ,  Yu Zhang ,  Kangqi Liu ,  Min Huang ,  Rui Hu ,  Qiaoyu Li ,  Chao Wei ,  Hao Xu ,  Wanshi Chen

IPC: H04B7/06 ,  H04W72/23

CPC classification number: H04B7/0626 ,  H04W72/23

Abstract: Port selection codebook enhancements are disclosed for spatial and frequency domain density (FDD) reciprocity. A base station may generate and signal a channel state information (CSI) report configuration including configuration of multiple CSI-reference signal (CSI-RS) port groups, wherein each group includes one or more CSI-RS ports, and each group is associated with one or more codebook subset restrictions (CBSRs). Using the configured restrictions of the CBSRs, served user equipments (UEs) may determine linear combination coefficient feedback based on channel measurements of selected port groups and signals the feedback to the base station. Once the base station receives the feedback it may then determine a hybrid CSI-RS codebook using both the configured CSI-RS port groups and the linear combination coefficients. The base station may then transmit downlink data encoded with a precoding matrix selected from the codebook. Other aspects and features are also claimed and described.

公开(公告)号：US20230421223A1

公开(公告)日：2023-12-28

申请号：US18253427

申请日：2021-01-29

Applicant: QUALCOMM INCORPORATED

Inventor： Qiaoyu Li ,  Yu Zhang ,  Liangming Wu ,  Hao Xu ,  Rui Hu ,  Chenxi Hao ,  Taesang Yoo

IPC: H04B7/06 ,  H04B7/0456 ,  H04B17/391

CPC classification number: H04B7/0626 ,  H04B17/3913 ,  H04B7/0456

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first indication of a first number of antenna ports for which the UE may report channel state information (CSI), and a second indication of a second number of antenna ports on which the UE may measure CSI reference signals (CSI-RSs). The second number may be less than the first number. The UE may receive a third indication of one or more neural networks to be used by the UE for determination of the CSI associated with the first number. The UE may determine the CSI using the one or more neural networks and using measurements made by the UE on the second number as inputs to the one or more neural networks. The UE may transmit a report including the CSI associated with the first number determined via the one or more neural networks.

公开(公告)号：US20250007586A1

公开(公告)日：2025-01-02

申请号：US18709470

申请日：2022-01-27

Applicant: QUALCOMM INCORPORATED

Inventor： Wei Xi ,  Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Min Huang ,  Jing Dai ,  Chao Wei ,  Rui Hu ,  Hao Xu

IPC: H04B7/06 ,  H04B7/01

Abstract: Methods, systems, and devices for wireless communication are described to support reducing a time domain selectivity of a downlink channel with multiple signal paths. A base station may spatially precode multiple channel state information reference signals (CSI-RSs) and transmit the spatially precoded CSI-RSs to a user equipment (UE), where at least one spatially precoded CSI-RS may correspond to each signal path. Based on the spatially precoded CSI-RSs, the UE may determine a mean or average Doppler shift for each signal path. The UE may transmit, to the base station, signaling indicative of the respective average Doppler shifts for each signal path. Based on the indication of the Doppler shifts, the base station may spatially and temporally precode one or more downlink transmissions to the UE, which may reduce the time domain selectivity of the downlink channel.

公开(公告)号：US12136973B2

公开(公告)日：2024-11-05

申请号：US18246025

申请日：2020-11-25

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Kangqi Liu ,  Min Huang ,  Rui Hu ,  Hao Xu ,  Wei Xi

IPC: H04B7/0456 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a channel state information (CSI) configuration indicating a first feedback reporting periodicity for a dominant, or strong, spatial layer and a second feedback reporting periodicity for a non-dominant, or weak, spatial layer. The UE may transmit a first CSI report for at least the dominant spatial layer according to the first feedback reporting periodicity. The UE may transmit a second CSI report for the non-dominant spatial layer according to the second feedback reporting periodicity. In some cases, for aperiodic reporting, the UE may be triggered by downlink control information to report CSI for the dominant spatial layer. In some cases, the CSI configuration may indicate different codebooks for the dominant and non-dominant spatial layers.

公开(公告)号：US20230261722A1

公开(公告)日：2023-08-17

申请号：US18003099

申请日：2020-08-19

Applicant: QUALCOMM INCORPORATED

Inventor： Wei Xi ,  Yu Zhang ,  Hao Xu ,  Min Huang ,  Chao Wei ,  Changlong Xu ,  Liangming Wu ,  Chenxi Hao ,  Qiaoyu Li ,  Kangqi Liu ,  Jing Dai ,  Rui Hu ,  Jian Li

IPC: H04B7/06 ,  H04B7/08 ,  H01Q3/26

CPC classification number: H04B7/06956 ,  H04B7/086 ,  H01Q3/26

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a device may select antenna elements from a planar array to transmit or receive an orbital angular momentum (OAM) beam. The device may determine a first area (e.g., a first ring area) based on an angular direction over which the device can communicate an OAM beam with a second device and may determine a second area (e.g., a second ring area) on the planar array based on projecting the first area on the planar array. The device may select a set of antenna elements from the planar array that are located within the second area. The device may determine a complex-valued weight for each antenna element of the selected set of antenna elements and may transmit or receive an OAM beam to or from the second device via the set of antenna elements according to the angular direction.