公开(公告)号：US12255841B2

公开(公告)日：2025-03-18

申请号：US17767378

申请日：2019-11-01

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Qiaoyu Li ,  Chao Wei ,  Hao Xu ,  Peter Gaal ,  Wanshi Chen

IPC: H04L5/00

Abstract: Certain aspects of the present disclosure provide techniques for using subband precoding for uplink transmissions. In some cases, a UE may transmit sounding reference signals (SRS) to a network entity, receive information indicating at least one of a set of one or more frequency domain (FD) bases and linear combination coefficients, determined based on the SRS transmission, determine subband precoding based at least in part on linear combinations of the FD bases based on the linear combination coefficients, and transmit a physical uplink shared channel (PUSCH) with the subband precoding.

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：US12088385B2

公开(公告)日：2024-09-10

申请号：US17311773

申请日：2019-12-19

Applicant: QUALCOMM Incorporated

Inventor： Qiaoyu Li ,  Liangming Wu ,  Chenxi Hao ,  Joseph Binamira Soriaga ,  Hao Xu

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0658 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0695

Abstract: Configurations and feedback schemes for compressed channel state information (CSI) feedback are provided. A User Equipment (UE) determines a constraint on a total number of transfer domain coefficients to be reported for compressed Channel State Information (CSI) feedback by the UE for a plurality of beams identified for the feedback, wherein each transfer domain coefficient is associated with amplitude information and phase information. The UE selects from a transfer domain coefficient compression matrix, based on the constraint, a set of one or more transfer domain coefficients to report for each of the beams. The UE reports information indicating a number of selected transfer domain coefficients in the set of transfer domain coefficients for each beam and a location of each transfer domain coefficient within the transfer domain coefficient compression matrix and reports at least the amplitude and phase information for the selected coefficients.

公开(公告)号：US12074706B2

公开(公告)日：2024-08-27

申请号：US17310189

申请日：2019-01-23

Applicant: QUALCOMM Incorporated

Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Jing Jiang ,  Hao Xu

IPC: H04L1/08

CPC classification number: H04L1/08

Abstract: Wireless communications systems and methods related to hybrid repeat request (HARQ) with rate splitting are provided. A first wireless communication device communicates, with a second wireless communication device, a first communication signal including a plurality of information bits. The first wireless communication device determines a number of bits in the plurality of information bits to be repeated in a second communication signal based on channel capacity information. The first wireless communication device communicates, with the second wireless communication device, the second communication signal including the plurality of information bits and a repetition of a subset of the plurality of information bits, where the subset of the plurality of information bits includes the determined number of bits.

公开(公告)号：US11962528B2

公开(公告)日：2024-04-16

申请号：US17274407

申请日：2019-08-23

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Qiaoyu Li ,  Wanshi Chen ,  Peter Gaal

IPC: H04B7/06 ,  H04L5/00

CPC classification number: H04L5/0048 ,  H04B7/0626 ,  H04B7/0634 ,  H04L5/0057

Abstract: Certain aspects of the present disclosure provide techniques for channel state information (CSI) for multiple transmission reception point (multi-TRP) transmission such as non-coherent joint transmission (NCJT), including determining subband sizes for CSI and rules for Part II CSI omission. A method that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration associated with one or more CSI reference signal (RS) resources, each CSI resource including a set of ports or port groups. The UE selects one or more CSI-RS resources for which to report CSI and determines a subband size for sending a CSI report based, at least in part, on payload of the CSI report. In an example method, the UE can determine whether the UE has sufficient resources for the CSI report and omit at least a portion of the CSI based on the determination.

公开(公告)号：US11791936B2

公开(公告)日：2023-10-17

申请号：US17866168

申请日：2022-07-15

Applicant: QUALCOMM Incorporated

Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Hao Xu

IPC: H04L1/00 ,  H03M13/13 ,  H03M13/00 ,  H04L1/1812 ,  H04L1/1829

CPC classification number: H04L1/0068 ,  H03M13/13 ,  H03M13/6306 ,  H03M13/6362 ,  H04L1/1819 ,  H04L1/1854

Abstract: Wireless devices may use polar codes for encoding transmissions and may support combining transmissions to improve decoding reliability (e.g., by achieving chase combining and incremental redundancy (IR) gains). For example, an encoding device may puncture a set of mother code bits using different puncturing patterns to obtain different redundancy versions for a first transmission and a re-transmission. Each puncturing pattern may correspond to an equivalent decoding performance. In some cases, to obtain equivalent puncture sets, the encoding device may perform punctured index manipulation procedures on an initial puncturing pattern. A punctured index manipulation procedure may involve switching a binary state for a binary bit at a same binary bit index for each puncture index in a puncturing pattern. A device may receive the transmissions generated using the equivalent puncture sets and may combine the information for improved decoding reliability.

公开(公告)号：US11777645B2

公开(公告)日：2023-10-03

申请号：US16967106

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Liangming Wu ,  Kai Chen ,  Jian Li ,  Hao Xu ,  Tingfang Ji ,  Joseph Binamira Soriaga ,  Jing Jiang

IPC: H04L1/00 ,  H04L1/08 ,  H04L1/1812

CPC classification number: H04L1/0057 ,  H04L1/0026 ,  H04L1/0041 ,  H04L1/0072 ,  H04L1/08 ,  H04L1/1812

Abstract: Techniques are provided for retransmission of Physical Uplink Shared Channel (PUCCH) for Ultra Reliable Low Latency Communications (URLLC). A User Equipment (UE) transmits at least one code block of a control channel, the at least one code block including Channel State Information (CSI), wherein each code block is polar encoded by assigning bit indices of the code block to bit channels in a particular order of reliabilities of the bit channels. The UE detects a trigger, and in response, retransmits at least a portion of each code block including retransmitted CSI, wherein the portion is polar encoded by assigning bit indices of the retransmitted CSI to the bit channels in the reverse order of reliabilities of the bit channels as compared to the polar encoding of the CSI.

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.

公开(公告)号：US11729783B2

公开(公告)日：2023-08-15

申请号：US16772736

申请日：2017-12-13

Applicant: Qualcomm Incorporated

Inventor： Changlong Xu ,  Liangming Wu ,  Kai Chen ,  Hao Xu ,  Jing Jiang ,  Jing Sun ,  Joseph Binamira Soriaga

IPC: H04L1/00 ,  H04L5/00 ,  H04W72/23 ,  H04L1/08

CPC classification number: H04W72/23 ,  H04L1/08 ,  H04L5/0053

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device such as a user equipment (UE) may monitor a search space of a control channel for at least one downlink transmission. The UE may perform a plurality of decoding operations on a plurality of decoding candidates associated with the downlink control information format transmitted in a plurality of transmission time intervals (TTIs). In some cases, the plurality of decoding operations may comprise performing a first decoding on a first decoding candidate received in a current TTI, the first decoding operation applying a first descrambling code to the first decoding candidate, and performing a second decoding operation on a combined decoding candidate that comprises soft combined information from the first and second decoding candidate, the second decoding candidate received in a prior TTI.