公开(公告)号：US20210328718A1

公开(公告)日：2021-10-21

申请号：US17271746

申请日：2019-10-03

Applicant: Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jian LI ,  Hao XU ,  Qualcomm Incorporated

Inventor： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jian LI ,  Hao XU

IPC: H04L1/00 ,  H03M13/00 ,  H03M13/13 ,  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：US20210152290A1

公开(公告)日：2021-05-20

申请号：US17045371

申请日：2019-04-04

Applicant: Jian LI ,  Changlong XU ,  Jing JIANG ,  Kai CHEN ,  Liangming WU ,  Hao XU ,  Qualcomm Incorporated

Inventor： Jian LI ,  Changlong XU ,  Jing JIANG ,  Kai CHEN ,  Liangming WU ,  Hao XU

IPC: H04L1/18 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, devices (e.g., base stations, user equipment (UEs), etc.) may utilize polar coding along with hybrid automatic repeat request (HARQ) techniques. In these systems, a device may encode bits for transmission by mapping information and parity check bits to a first set of polarized bit channels of a polar code. If this transmission is not successfully received at a decoding device, the encoding device may generate a HARQ retransmission. The device may copy information bits to a second set of polarized bit channels of a second polar code containing the first polar code and may assign parity check bits to the second set of bit channels for the copied information bits. These additional parity check bits for the repeated information bits may increase transmission reliability and may support improved early termination at the decoding device.

公开(公告)号：US20210099213A1

公开(公告)日：2021-04-01

申请号：US17041052

申请日：2019-04-02

Applicant: Kai CHEN ,  Changlong XU ,  Liangming WU ,  Hao XU ,  Qualcomm incorporated

Inventor： Kai Chen ,  Changlong XU ,  Liangming WU ,  Hao XU

IPC: H04B7/06 ,  H03M13/13 ,  H04B17/336

Abstract: A device may generate a first set of encoded bits by mapping an information bit vector to a first set of polarized bit channels of a first polar code according to a first bit index set, the first bit index set being based on respective bit channel reliabilities of the first set of polarized bit channels. The device may transmit the first set of encoded bits to another device over a wireless channel The device may receive an indication that a decoding of the first set of encoded bits was unsuccessful. The device may generate a second set of encoded bits by mapping a repetition of at least one bit to at least one bit channel of a second set of polarized bit channels of a second polar code according to a second bit index set. The device may transmit the second set of encoded bits to the other device.

公开(公告)号：US20210083795A1

公开(公告)日：2021-03-18

申请号：US16772128

申请日：2019-01-10

Applicant: Kai CHEN ,  Liangming WU ,  Hao XU ,  Changlong XU ,  QUALCOMM Incorporated

Inventor： Kai CHEN ,  Liangming WU ,  Changlong XU ,  Hao XU

IPC: 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：US20200235854A1

公开(公告)日：2020-07-23

申请号：US16831263

申请日：2020-03-26

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Joseph Binamira SORIAGA ,  Jilei HOU

IPC: H04L1/00 ,  H04L12/26 ,  H04L29/08

Abstract: Aspects of the disclosure relate to wireless communication systems configured to provide techniques for polar coding control information together with combined cyclic redundancy check (CRC) information. The combined CRC information may include a number of CRC bits selected to jointly decode and verify the control information to reduce the CRC overhead.

公开(公告)号：US20200092041A1

公开(公告)日：2020-03-19

申请号：US16470881

申请日：2018-01-12

Applicant: Hari SANKAR ,  Gabi SARKIS ,  Changlong XU ,  Alexei GOROKHOV ,  Jing JIANG ,  Joseph Binamira SORIAGA ,  Jilei HOU ,  QUALCOMM Incorporated

Inventor： Hari SANKAR ,  Gabi SARKIS ,  Changlong XU ,  Alexei GOROKHOV ,  Jing JIANG ,  Joseph Binamira SORIAGA ,  Jilei HOU

IPC: H04L1/00 ,  H04L5/00 ,  H03M13/00 ,  H03M13/13

Abstract: The disclosure relates in some aspects to information encoding. Information encoding may involve puncturing bits of a codeword or repeating bits of a codeword. The disclosure relates in some aspects to selecting a puncturing or repetition pattern. In some aspects, a puncture pattern for data encoding is selected based on a criterion that the output and the repetition input of an XOR are not erased. In some aspects, a repetition pattern for data encoding is selected based on a criterion that repetition not be applied for the output and the repetition input of an XOR.

公开(公告)号：US20200083987A1

公开(公告)日：2020-03-12

申请号：US16468622

申请日：2018-01-08

Applicant: Changlong XU ,  Chao WEI ,  Jing JIANG ,  Gaojin WU ,  Hari SANKAR ,  Jilei HOU ,  QUALCOMM Incorporated

Inventor： Changlong XU ,  Chao WEI ,  Jing JIANG ,  Gaojin WU ,  Hari SANKAR ,  Jilei HOU

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

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for rate-matching control channels using polar codes. An exemplary method generally includes encoding a stream of bits using a polar code, determining a size of a circular buffer for storing the encoded stream of bits based, at least in part, on a minimum supported code rate and a control information size, and performing rate-matching on stored encoded stream of bits based, at least in part, on a mother code size, N, and a number of coded bits for transmission, E.

公开(公告)号：US20190215105A1

公开(公告)日：2019-07-11

申请号：US16336250

申请日：2017-06-22

Applicant: Changlong XU ,  Jian LI ,  Chao WEI ,  Chong LI ,  Joseph Binamina SORIAGA ,  Jelei HOU ,  QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian Li ,  Chao WEI ,  Chong LI ,  Joseph Binamira SORIAGA ,  Jilei HOU

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

CPC classification number: H04L1/1819 ,  H03M13/13 ,  H04B17/336 ,  H04L1/00 ,  H04L1/0063 ,  H04L1/0068

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：US20190052418A1

公开(公告)日：2019-02-14

申请号：US16078480

申请日：2016-11-04

Applicant: QUALCOMM Incorporated

Inventor： Jian LI ,  Changlong XU ,  Jilei HOU ,  Neng WANG ,  Chao WEI

IPC: H04L1/18 ,  H04L1/00 ,  H04L1/20 ,  H03M13/29

Abstract: For communication utilizing polar codes, a hybrid automatic repeat request algorithm utilizing incremental redundancy (HARQ-IR) may provide increased throughput by including new data, not based on an original transmission, in a HARQ retransmission. The number of retransmitted bits and new information bits in each HARQ retransmission may be controlled in order to manage a tradeoff between increased throughput and a decreased block error rate (BLER).

公开(公告)号：US20250106857A1

公开(公告)日：2025-03-27

申请号：US18730885

申请日：2022-03-25

Applicant: QUALCOMM Incorporated

Inventor： Jian LI ,  Liangming WU ,  Changlong XU ,  Jing JIANG ,  Kangqi LIU ,  Wei YANG ,  Hobin KIM ,  Hari SANKAR ,  Hao XU

IPC: H04W72/23 ,  H04L27/26

Abstract: Wireless communications systems and methods related to communicating control information are provided. A method of wireless communication performed by a user equipment (UE) may include monitoring a first set of physical downlink control channel (PDCCH) candidate resources for a PDCCH communication from a network unit, receiving, from the network unit, a plurality of demodulation reference signals (DMRSs), and decoding, based on a metric associated with the plurality of demodulation reference signals (DMRSs) satisfying a threshold, the PDCCH communication.