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：US20230171032A1

公开(公告)日：2023-06-01

申请号：US17995394

申请日：2020-04-03

Applicant: QUALCOMM Incorporated

Inventor： Kangqi Liu ,  Changlong Xu ,  Jian Li ,  Liangming Wu ,  Yu Zhang ,  Hao Xu

IPC: H04L1/08 ,  H04L5/00

CPC classification number: H04L1/08 ,  H04L5/0053

Abstract: Network coding in automatic receipt request (ARQ) functionality is disclosed. A compatible transmitter configures a new transmission period, in which the set of data for transmission is transmitted, and a retransmission period, after the new transmission period, in which a number of network coded data is retransmitted based on the acknowledgement feedback received from the receivers receiving the transmitted set of data. The acknowledgement feedback identifies one or more data requested for retransmission by one or more of the receivers. The transmitter determines a number of network coded data that could be transmitted to accommodate each of the requesting receivers and the data requested by such receivers for retransmission. These network coded data would then be retransmitted by the transmitter during the retransmission period.

公开(公告)号：US11558149B2

公开(公告)日：2023-01-17

申请号：US16544788

申请日：2019-08-19

Applicant: QUALCOMM Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29

Abstract: Aspects of the disclosure relate to wireless communication devices configured to encode information blocks to produce code blocks and interleave the code blocks utilizing an interleaver including a plurality of rows and a plurality of columns, where the number of columns of the interleaver varies between the rows. In some examples, the interleaver includes a right isosceles triangle-shaped matrix of rows and columns. In other examples, the interleaver includes a trapezoid-shaped matrix of rows and columns.

公开(公告)号：US11451245B2

公开(公告)日：2022-09-20

申请号：US16628209

申请日：2017-08-04

Applicant: QUALCOMM Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Jing Jiang ,  Hao Xu ,  Jilei Hou

IPC: H03M13/00 ,  H03M13/27 ,  H03M13/15 ,  H03M13/29

Abstract: Aspects of the disclosure relate to wireless communication devices configured to encode information blocks to produce code blocks and interleave the code blocks utilizing an interleaver including a plurality of rows and a plurality of columns. In some examples, the interleaver includes a right isosceles triangle-shaped matrix of rows and columns. In other examples, the interleaver includes a rectangle-shaped matrix of rows and columns.

公开(公告)号：US10855405B2

公开(公告)日：2020-12-01

申请号：US16336250

申请日：2017-06-22

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Chao Wei ,  Chong Li ,  Joseph Binamira Soriaga ,  Jilei Hou

IPC: H04J11/00 ,  H04L1/18 ,  H04L1/00 ,  H04B17/336 ,  H03M13/13

Abstract: Various aspects of the disclosure relate to retransmission techniques for communication of information (e.g., for wireless communication). In some aspects, if a device's first transmission including encoded data and parity information (subject to puncture) fails, the device's retransmission (e.g., in response to a NAK) involves transmitting the parity information that was punctured. In some aspects, the coding rate used for encoding the data for the first transmission is selected to meet an error rate (e.g., a block error rate) for the second transmission. The second transmission may also include repetition information that includes the encoded data. The repetition information could also include at least a portion of the encoded parity information.

公开(公告)号：US10291359B2

公开(公告)日：2019-05-14

申请号：US15643003

申请日：2017-07-06

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Chao Wei ,  Jilei Hou

IPC: H04L1/18 ,  H04L1/00 ,  H04L1/08 ,  H04L1/16 ,  H04L1/20 ,  G08C25/02

Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for design of hybrid automatic repeat request (HARQ) feedback bits. The method generally includes obtaining a payload to be transmitted, partitioning the payload into a plurality of blocks, and partitioning each block of the plurality of blocks into a plurality of sections. The method also includes deriving redundancy check information for each section of the plurality of sections, and generating a plurality of codewords, each comprising a block of the plurality of blocks and the redundancy check information for each section of the block, wherein a location of each of the sections in the codewords is determined based on an error rate corresponding to each of the sections.

公开(公告)号：US12237919B2

公开(公告)日：2025-02-25

申请号：US18004648

申请日：2021-07-23

Applicant: QUALCOMM Incorporated

Inventor： Ruiming Zheng ,  Changlong Xu ,  Jian Li ,  Kangqi Liu ,  Liangming Wu ,  Peng Cheng ,  Hao Xu ,  Xipeng Zhu

IPC: H04L1/00 ,  H04L1/1607 ,  H04L1/1829 ,  H04L1/1867 ,  H04L69/22

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may receive one or more service data units (SDUs) at a layer two (L2) layer of the transmitting device. The transmitting device may encode, at the L2 layer, the one or more SDUs according to one or more network coding parameters to obtain at least one encoded protocol data unit (PDU), the one or more network coding parameters comprising a rateless code. The transmitting device may generate, for the at least one encoded PDU, at least one corresponding PDU header. The transmitting device may output the at least one encoded PDU and the at least one corresponding PDU header from the L2 layer to a lower layer of the transmitting device for transmission to one or more receiving devices.

公开(公告)号：US20230224077A1

公开(公告)日：2023-07-13

申请号：US18187255

申请日：2023-03-21

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian Li ,  Chao WEI ,  Jing JIANG ,  Jilei HOU

IPC: H04L1/00

CPC classification number: H04L1/0061 ,  H04L1/0052

Abstract: Methods, systems, and devices for wireless communication are described for dynamic frozen bits of polar codes for early termination and performance improvement. A wireless device may receive a signal comprising a codeword encoded using a polar code. The wireless device may perform decoding of the codeword including at least: parity check of a first subset of decoding paths for making a decision on early termination of decoding of the codeword based on dynamic frozen bits, and generating path metrics for a second subset of the decoding paths that each pass the parity check based on the dynamic frozen bits, and performing error detection on a bit sequence corresponding to one of the second subset of the decoding paths based at part on error detection bits and the generated path metrics. The wireless device may process the information bits based on a result of the decoding.

公开(公告)号：US11695505B2

公开(公告)日：2023-07-04

申请号：US17500347

申请日：2021-10-13

Applicant: Qualcomm Incorporated

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

IPC: H04L1/00 ,  H04L1/1812

CPC classification number: H04L1/0052 ,  H04L1/0041 ,  H04L1/0061 ,  H04L1/1812

Abstract: Methods, systems, and devices for wireless communications are described. An encoder of a wireless device may receive a transport block (TB) for transmission and segment the transport block into a set of multiple, smaller data segments that respectively correspond to a plurality of code blocks of the TB. The encoder may generate a code block level (CB-level) error detection code (EDC) for a subset of the data segments. The encoder may generate a transport block-level (TB-level) EDC for the TB using the data segments. Each of the code blocks (CBs) may be of the same size and may include one of the data segments. A subset of the CBs may include a data segment from the subset of the data segments and one of the CB-level EDCs. The remaining CBs that are not part of the subset may include a remaining data segments and the TB-level EDC.

公开(公告)号：US20230198668A1

公开(公告)日：2023-06-22

申请号：US17996072

申请日：2020-04-24

Applicant: QUALCOMM Incorporated

Inventor： Kangqi Liu ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Hao Xu

IPC: H04L1/00

CPC classification number: H04L1/0064 ,  H04L1/0046 ,  H04L1/0041

Abstract: In one aspect of the disclosure, a method of wireless communication performed by a receiving device includes receiving, from a transmitting device, a plurality of encoded packets each including at least one respective physical (PHY) layer symbol. The method includes decoding the plurality of encoded packets based on a raptor code to generate received data. The method also includes determining a signal-to-interference-plus-noise ratio (SINR) associated with receiving the plurality of encoded packets, receiving an indication from the transmitting device, or determining a channel quality indicator (CQI) or a modulation and coding scheme (MCS) associated with receiving the plurality of encoded packets. The method further includes adaptively determining a PHY packet error rate associated with the plurality of encoded packets based on the SINR, the indication, the CQI, or the MCS. Other aspects and features are also claimed and described.