公开(公告)号：US11588596B2

公开(公告)日：2023-02-21

申请号：US17056209

申请日：2019-06-20

Applicant: Qualcomm Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Hao Xu ,  Wanshi Chen ,  Peter Gaal ,  Tao Luo

IPC: H04L5/00 ,  H04B7/0452

Abstract: Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may receive, from a base station, a configuration associated with a layer to reference signal port mapping. In some cases, the UE may identify, based at least in part on the configuration, that at least one layer of a set of layers for receiving a downlink transmission from the base station is adapted based on at least one interference layer. In some cases, the adapted layer may be mapped to one or more reference signal ports. The UE may receive the downlink transmission and may decode the downlink transmission based on identifying that the at least one layer is adapted and the layer to reference signal port mapping.

公开(公告)号：US11569878B2

公开(公告)日：2023-01-31

申请号：US16606032

申请日：2017-06-08

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Yu Zhang ,  Wanshi Chen

IPC: H04B7/0456 ,  H04B7/06

Abstract: Precoding matrix indicator (PMI) feedback for Type II channel state information (CSI) feedback in new radio (NR) multiple input, multiple output (MIMO) operations is discussed. According to various aspects, a user equipment (UE) determines a plurality of CSI feedback components and identifies a set of discarded ones of these components based on a particular component value of a precoding matrix indicator (PMI) component. The UE may then generate an adjusted CSI report by adjusting how the discarded feedback components are treated. The resulting adjusted CSI report may then be transmitted to a serving base station.

公开(公告)号：US20220360366A1

公开(公告)日：2022-11-10

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 ,  H04L1/18

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：US11438100B2

公开(公告)日：2022-09-06

申请号：US16640982

申请日：2017-08-21

Applicant: Qualcomm Incorporated

Inventor： Liangming Wu ,  Jing Jiang ,  Changlong Xu

IPC: H04L1/00

Abstract: Methods, systems, and devices for wireless communication are described for polar coding with rate matching. A transmitter may construct input channels into a polar encoder to provide an information bit vector that does not include punctured or shortened bits. One or more transmission capacity factors may be used in identifying the information bit vector, which may be mapped to one or more of a codeword length of the polar code or a number of transmitted bits in each codeword. A number of different rate matching schemes may be available for transmissions, and may be selected based on one or more polar coding parameters. In some cases, mapping techniques may be used in two or more different rate matching schemes.

公开(公告)号：US20220271819A1

公开(公告)日：2022-08-25

申请号：US17744373

申请日：2022-05-13

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Liangming Wu ,  Yu Zhang ,  Hao Xu ,  Chao Wei ,  Wanshi Chen

IPC: H04B7/06 ,  H04B7/0456

Abstract: Methods, systems, and devices for wireless communication are described. In wireless systems supporting multiple-input, multiple-output (MIMO) transmissions, devices may implement beam-forming to improve reliability of communications. A user equipment (UE) may select a set of beams, and corresponding beam indices, for communication based on reference signals received from a base station. The UE may determine values corresponding to each of the beam indices using a scalable set of tables. For example, the UE may select a subset of the tables based on the number of selected beams, and may determine the values based on these tables. In this way, the UE may efficiently store sets of tables for multiple different configurations. The UE may sum the corresponding values to obtain a combination index value, and may transmit the combination index value to the base station. The base station may determine the selected beams based on this combination index value.

公开(公告)号：US11411630B2

公开(公告)日：2022-08-09

申请号：US17312327

申请日：2019-12-19

Applicant: QUALCOMM Incorporated

Inventor： Qiaoyu Li ,  Min Huang ,  Liangming Wu ,  Chenxi Hao ,  Chao Wei

IPC: H04B7/02 ,  H04B7/06 ,  H04B17/318

Abstract: Certain aspects of the present disclosure provide techniques for reporting beam-strength related Type-II channel state information (CSI) coefficient feedback.

公开(公告)号：US11343015B2

公开(公告)日：2022-05-24

申请号：US16772128

申请日：2019-01-10

Applicant: QUALCOMM Incorporated

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

IPC: H04L25/00 ,  H04L1/00 ,  H04B7/0413

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for channel-war polar code construction.

公开(公告)号：US11218340B2

公开(公告)日：2022-01-04

申请号：US16636531

申请日：2018-08-10

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Hao Xu ,  Wanshi Chen

IPC: H04L25/02 ,  H04L5/00 ,  H04B7/0456 ,  H04W72/04

Abstract: Techniques and apparatus for configuring transmission rank and/or precoder(s) to support uplink non-codebook based transmission are provided. One technique includes receiving sounding reference signal (SRS) resource(s) from a user equipment (UE), where each SRS resource is associated with one or more precoded ports. At least one of a transmission rank or a set of precoders is determined based on the SRS resource(s). An indication of at least one of the SRS resource(s) is signaled to the UE. The UE uses the indication of the at least one of the SRS resource(s) to send an uplink transmission.

公开(公告)号：US20200220603A1

公开(公告)日：2020-07-09

申请号：US16638197

申请日：2018-08-10

Applicant: Qualcomm Incorporated

Inventor： Chenxi Hao ,  Liangming Wu ,  Yu Zhang ,  Hao Xu ,  Chao Wei ,  Wanshi Chen

IPC: H04B7/06 ,  H04B7/0456

Abstract: Methods, systems, and devices for wireless communication are described. In wireless systems supporting multiple-input, multiple-output (MIMO) transmissions, devices may implement beam-forming to improve reliability of communications. A user equipment (UE) may select a set of beams, and corresponding beam indices, for communication based on reference signals received from a base station. The UE may determine values corresponding to each of the beam indices using a scalable set of tables. For example, the UE may select a subset of the tables based on the number of selected beams, and may determine the values based on these tables. In this way, the UE may efficiently store sets of tables for multiple different configurations. The UE may sum the corresponding values to obtain a combination index value, and may transmit the combination index value to the base station. The base station may determine the selected beams based on this combination index value.

公开(公告)号：US20200178240A1

公开(公告)日：2020-06-04

申请号：US16615534

申请日：2018-06-15

Applicant: Yu ZHANG ,  Chao WEI ,  Liangming WU ,  Wanshi CHEN ,  QUALCOMM Incorporated

Inventor： Yu Zhang ,  Chao Wei ,  Liangming Wu ,  Wanshi Chen

IPC: H04W72/04 ,  H04L5/00

Abstract: Reporting aperiodic channel state information (A-CSI) via a physical uplink control channel (PUCCH) is disclosed. A UE receives a configuration to report aperiodic channel state information (A-CSI) using physical uplink control channel (PUCCH). The UE can report lightweight A-CSI via short/long PUCCH or may report heavy A-CSI via short/long PUCCH. The UE receives a trigger signal for PUCCH-based A-CSI reporting either by a dedicated downlink grant or by a group common DCI. When triggered via a DCI-based trigger, the PUCCH resource can be either a resource used for HARQ-ACK feedback, e.g., short PUCCH; or a semi-static configured PUCCH resource, e.g., either short PUCCH or long PUCCH. When triggered via a group common DCI-based trigger, the PUCCH resource can be either semi-statically configured, or dynamically indicated.