公开(公告)号：US20210328718A1

公开(公告)日：2021-10-21

申请号：US17271746

申请日：2019-10-03

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

发明人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jian LI ,  Hao XU

IPC分类号： H04L1/00 ,  H03M13/00 ,  H03M13/13 ,  H04L1/18

摘要： 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

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

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

IPC分类号： H04L1/18 ,  H04L1/00

摘要： 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：US20210234639A1

公开(公告)日：2021-07-29

申请号：US17054917

申请日：2019-05-28

申请人： Kai CHEN ,  Jian LI ,  Changlong XU ,  Liangming WU ,  Hao XU ,  Qualcomm incorporated

发明人： Kai CHEN ,  Jian LI ,  Changlong XU ,  Liangming WU ,  Hao XU

IPC分类号： H04L1/18 ,  H04L1/00 ,  H04L5/00

摘要： A device may identify that an incremental redundancy hybrid automatic repeat request (IR-HARQ) scheme is used in association with sequential transmissions of an information bit vector to or from another wireless device, where each transmission in the scheme is associated with a resource size. The device may identify a mother code length for a polar code based at least in part on an aggregate resource size associated with the sequential transmissions. The device may identify an adjusted bit index set for the polar code based at least in part on the IR-HARQ scheme. The device may transmit (or receive), for each transmission of the information bit vector, a respective subset of encoded bits generated by mapping the information bit vector to a set of polarized bit channels of the polar code in accordance with the bit index set.

公开(公告)号：US20200351029A1

公开(公告)日：2020-11-05

申请号：US16758549

申请日：2018-10-02

申请人： Jian LI ,  Changlong XU ,  Kai CHEN ,  Liangming WU ,  Jing JIANG ,  Hao XU ,  QUALCOMM Incorporated

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

IPC分类号： H04L1/18 ,  H04L1/00

摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may perform a first transmission of a communication that is encoded using a polar coding technique; and perform at least one retransmission of the communication, wherein more resources are allocated for the at least one retransmission than for the first transmission, and wherein the at least one retransmission includes an incremental redundancy version of the communication and a version of the communication for Chase combination. Numerous other aspects are provided.

公开(公告)号：US20220140946A1

公开(公告)日：2022-05-05

申请号：US17310189

申请日：2019-01-23

申请人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jian LI ,  Jing JIANG ,  Hao XU ,  QUALCOMM Incorporated

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

IPC分类号： H04L1/08

摘要： 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：US20230344547A1

公开(公告)日：2023-10-26

申请号：US17796393

申请日：2020-03-24

申请人： Kangqi LIU ,  Jian LI ,  Changlong XU ,  Liangming WU ,  Hao XU ,  QUALCOMM Incorporated

发明人： Kangqi LIU ,  Jian LI ,  Changlong XU ,  Liangming WU ,  Hao XU

IPC分类号： H04L1/00

CPC分类号： H04L1/0002 ,  H04L1/0034

摘要： Aspects described herein relate to encoding wireless communications using feedback from receiving devices to achieve an adaptive coding rate, which can include generating, for a set of source symbols representing data to be transmitted in a broadcast channel, a set of encoded symbols for transmitting in the broadcast channel, transmitting a first number of the set of encoded symbols over the broadcast channel, requesting, based on transmitting the first number of the set of encoded symbols, feedback from a set of user equipment (UEs), and determining, based at least in part on the feedback, whether to continue transmitting a second number of the set of encoded symbols or begin transmitting a new set of encoded symbols representing new data to be transmitted in the broadcast channel.

公开(公告)号：US20210099213A1

公开(公告)日：2021-04-01

申请号：US17041052

申请日：2019-04-02

申请人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Hao XU ,  Qualcomm incorporated

发明人： Kai Chen ,  Changlong XU ,  Liangming WU ,  Hao XU

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

摘要： 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

申请人： Kai CHEN ,  Liangming WU ,  Hao XU ,  Changlong XU ,  QUALCOMM Incorporated

发明人： Kai CHEN ,  Liangming WU ,  Changlong XU ,  Hao XU

IPC分类号： H04L1/00 ,  H04B7/0413

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

公开(公告)号：US20210105089A1

公开(公告)日：2021-04-08

申请号：US15733499

申请日：2019-01-17

申请人： Kai CHEN ,  Liangming WU ,  Changlong XU ,  Jian UI ,  Hao XU ,  QUALCOMM Incorporated

发明人： Kai CHEN ,  Liangming WU ,  Changlong XU ,  Jian LI ,  Hao XU

IPC分类号： H04L1/00 ,  H04L1/18

摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may perform a first polar code encoding process on a first transmission of a hybrid automatic repeat request (HARQ) process; generate a second transmission of the HARQ process by relocating a portion of bits in less reliable positions of the first transmission to more reliable positions of the second transmission of the HARQ process, wherein the less reliable positions and the more reliable positions are evaluated based at least in part on a channel transform, wherein the channel transform is based at least in part on the first transmission, the second transmission, the first polar encoding process and a second polar encoding process associated with the second transmission; and transmit the second transmission of the HARQ process. Numerous other aspects are provided.

公开(公告)号：US20210036718A1

公开(公告)日：2021-02-04

申请号：US15733711

申请日：2019-04-02

申请人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jing JIANG ,  Hao XU ,  QUALCOMM INCORPORATED

发明人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jing JIANG ,  Hao XU

IPC分类号： H03M13/13 ,  H03M13/00 ,  H03M13/43 ,  H03M13/45 ,  H04L1/18

摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an encoding device may determine a least reliable subset of information bits included in a set of information bits that includes a predefined active set of information bits to be encoded; may determine a codeword bit to be added to a codeword based at least in part on the least reliable subset of information bits, wherein adding the codeword bit to the codeword improves reliability of the least reliable subset of information bits; may add the codeword bit to the codeword; and may transmit the codeword. Numerous other aspects are provided.