公开(公告)号：US11489625B2

公开(公告)日：2022-11-01

申请号：US16604060

申请日：2018-04-06

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Chao Wei ,  Jing Jiang ,  Jilei Hou ,  Yang Yang ,  Gabi Sarkis

IPC: H04L1/00 ,  H04L1/08

Abstract: Aspects of the disclosure relate to rate-matching a stream of bits encoded using polar codes. An exemplary method generally includes determining a mother code size (N) for transmitting an encoded stream of bits based, at least in part, on a minimum supported code rate for transmitting the encoded stream of bits (Rmin), a control information size of the encoded stream of bits (K), a number of coded bits for transmission (E), and a maximum mother code size (Nmax), encoding a stream of bits using a polar code of size (N, K) and storing the encoded stream of bits in a circular buffer, and performing rate-matching on the stored encoded stream of bits based, at least in part, on a comparison among the mother code size (N), the control information size of the encoded stream of bits (K), and the number of coded bits for transmission (E).

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：US20220190958A1

公开(公告)日：2022-06-16

申请号：US17645243

申请日：2021-12-20

Applicant: QUALCOMM Incorporated

Inventor： Jing Jiang ,  Gabi Sarkis ,  Yang Yang ,  Shrinivas Kudekar ,  Joseph Binamira Soriaga ,  Hari Sankar ,  Changlong Xu ,  Chao Wei

IPC: H04L1/00

Abstract: Methods, systems, and devices for encoding and decoding are described. To encode a vector, an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups. The groups may vary in size and allocation of the information bits is based on a base sequence of a given length. During decoding, a decoder assigns different bit types to channels instances by dividing a codeword into a plurality of groups and assigning bit types to channel instances of the plurality of groups using the base sequence.

公开(公告)号：US11362769B2

公开(公告)日：2022-06-14

申请号：US16078341

申请日：2016-11-04

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/18 ,  H03M13/13

Abstract: For communication utilizing polar codes, a hybrid automatic repeat request (HARQ) algorithm is provided that takes advantage of the benefits of chase combining HARQ (HARQ-CC) and incremental redundancy HARQ (HARQ-IR), by selecting one or the other in accordance with a code rate of the first transmission. In some examples, the HARQ algorithm utilizes HARQ-IR when the code rate in the first transmission is greater than a code rate threshold, and utilizes HARQ-CC when the code rate in the first transmission is less than the code rate threshold.

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：US11201691B2

公开(公告)日：2021-12-14

申请号：US16478759

申请日：2018-02-22

Applicant: Qualcomm Incorporated

Inventor： Yang Yang ,  Jing Jiang ,  Gabi Sarkis ,  Chao Wei ,  Jian Li ,  Hari Sankar ,  Changlong Xu ,  Joseph Binamira Soriaga

IPC: H04L1/00 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. To encode a vector of bits using a polar code, an encoder may allocate information bits of the vector to polarized bit-channels associated with a channel (e.g., a set of unpolarized bit-channels) used for a transmission. In some cases, the polarized bit-channels may be partitioned into groups associated with different values of some associated reliability metric (s). The information bits may be allocated to the polarized bit-channels based on the reliability metrics of the different polarized bit-channels and the overall capacity of a transmission. That is, the bit locations of a transmission may depend on the reliability metrics of different polarized bit-channels and the overall capacity of the transmission. To facilitate puncturing, the overall capacity of the transmission may be adjusted and the unpolarized bit-channels may be partitioned into polarized bit-channels based on the adjusted capacity.

公开(公告)号：US20210377917A1

公开(公告)日：2021-12-02

申请号：US16772736

申请日：2017-12-13

Applicant: Changlong XU ,  Uiangming WU ,  Kai CHEN ,  Hao XU ,  Jing JIANG ,  Jing SUN ,  Joseph Binamira SORIAGA ,  Qualcomm Incorporated

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

IPC: H04W72/04 ,  H04L1/08 ,  H04L5/00

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.

公开(公告)号：US20210359706A1

公开(公告)日：2021-11-18

申请号：US17443992

申请日：2021-07-29

Applicant: QUALCOMM INCORPORATED

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

IPC: H03M13/13 ,  H04B17/336 ,  H03M13/35 ,  H04L1/00 ,  H04L1/18

Abstract: Methods and apparatus for constructing polar codes are provided. A transmitter determines at least one set of parameters corresponding to data to be transmitted, and a set of sorting indices corresponding to bits of the data to be transmitted based on the set of parameters, the set of sorting indices indicating a position set of the bits to be transmitted. The transmitter polar encodes the data based at least on the set of parameters and the set of sorting indices to generate a coded block of the data, and transmits the coded block of the data.

公开(公告)号：US11147043B2

公开(公告)日：2021-10-12

申请号：US16467454

申请日：2018-01-24

Applicant: Qualcomm Incorporated

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

IPC: H04W72/00 ,  H04L1/00 ,  H04L1/18 ,  H04W56/00

Abstract: Methods, systems, and devices for wireless communication are described. In order to exchange data over a given wireless communication network, a wireless device may first perform a cell acquisition procedure (e.g., to determine cell-specific information such as timing and frequency offsets, bandwidth, control channel formatting, etc.). In some systems, aspects of the timing information may be conveyed with scrambling codes applied to a master information block (MIB). Physical broadcast channel (PBCH) payloads, including MIB transmissions, may be jointly encoded with synchronization signal indices. Bursts of MIB transmissions may thus be decoded without blind decoding while maintaining error protection and low latency that may be necessary to obtain critical system information within the MIB.

公开(公告)号：US11095402B2

公开(公告)日：2021-08-17

申请号：US16345621

申请日：2017-12-22

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Jing Jiang ,  Changlong Xu ,  Jilei Hou

IPC: H03M13/00 ,  H04L1/18 ,  H03M13/13 ,  H03M13/29

Abstract: The present disclosure describes various examples of a method, an apparatus, and a computer-readable medium for wireless communications (e.g., 5G NR) using hybrid automatic repeat request (HARQ). For example, one of the methods includes generating a first codeword based on a first code block length, transmitting a first signal using the first codeword, generating a second codeword with incremental redundancy information based on a second code block length, generating a third codeword with repetition of at least a portion of the first codeword based on a third code block length, and transmitting a second signal using at least the second codeword or the third codeword.