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.

公开(公告)号：US11082066B2

公开(公告)日：2021-08-03

申请号：US16466270

申请日：2017-06-12

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Chao Wei ,  Jilei Hou

IPC: H03M13/00 ,  H03M13/13 ,  H03M13/09

Abstract: Aspects of the disclosure relate to wireless communication systems configured to provide techniques for multiplexing dedicated control information for a plurality of users in a single information block and polar coding the information block to produce a polar code block of dedicated control information for transmission over a wireless air interface. The information block may further include group cyclic redundancy check (CRC) information for the information block and individual CRC information for each dedicated control information.

公开(公告)号：US11063613B2

公开(公告)日：2021-07-13

申请号：US16605911

申请日：2017-05-15

Applicant: Qualcomm Incorporated

Inventor： Gabi Sarkis ,  Hari Sankar ,  Gaojin Wu ,  Changlong Xu ,  Jing Jiang ,  Huang Lou

IPC: H03M13/37 ,  H03M13/13

Abstract: Techniques are described herein to terminate a list decoding operation before its completion based on performing one or more error check processes. A transmitted codeword encoded using a polar code may include one or more error check vectors interspersed with one or more information vectors. Upon receiving the codeword, a decoder may perform a list decoding operation on the received codeword. Upon decoding one of the error check vectors, the decoder may determine whether at least one candidate path used in the successive cancellation list decoding operation passes an error check process based on the error check vector. If no candidate paths satisfy the error check process, the decoder may terminate the list decoding operation. In some examples, the decoder may recheck whether candidate paths satisfy the error check operation at intermediate positions between error check vectors. Such rechecking may occur while decoding information vectors.

公开(公告)号：US11044048B2

公开(公告)日：2021-06-22

申请号：US16470881

申请日：2018-01-12

Applicant: QUALCOMM Incorporated

Inventor： Hari Sankar ,  Gabi Sarkis ,  Changlong Xu ,  Alexei Gorokhov ,  Jing Jiang ,  Joseph Binamira Soriaga ,  Jilei Hou

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

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：US20210167891A1

公开(公告)日：2021-06-03

申请号：US17178012

申请日：2021-02-17

Applicant: Qualcomm Incorporated

Inventor： Jing Jiang ,  Gabi Sarkis ,  Yang Yang ,  Shrinivas Kudekar ,  Joseph 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：US20210135783A1

公开(公告)日：2021-05-06

申请号：US16487050

申请日：2017-12-14

Applicant: Yang YANG ,  Jing JIANG ,  Gabi SARKIS ,  Chao WEI ,  Jian LI ,  Changlong XU ,  Hari SANKAR ,  Joseph Binamira SORIAGA ,  QUALCOMM Incorporated

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

IPC: H04L1/00 ,  H03M13/13 ,  H03M13/01 ,  G06N7/00

Abstract: Methods, systems, and devices for wireless communication are described for mutual information based polar code construction. A wireless device may receive a codeword over a wireless channel, the codeword encoded using a polar code. The wireless device may identify a set of bit locations of the polar code corresponding to information bits of an encoded information bit vector. The set of bit locations may be determined based at least in part on a reliability order of the bit locations of the polar code, and the reliability order may be determined based at least in part on a recursive model that includes at least one mutual information transfer function that is applied at each polarization stage of multiple polarization stages of the polar code. The wireless device may decode the received codeword to obtain the information bit vector at the set of bit locations.

公开(公告)号：US20200007160A1

公开(公告)日：2020-01-02

申请号：US16487242

申请日：2017-03-23

Applicant: QUALCOMM Incorporated

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

IPC: H03M13/13 ,  H04L1/00 ,  H03M13/09 ,  H03M13/29 ,  H03M13/00

Abstract: Methods, systems, and devices for wireless communication are described that support channel selection for parity bits in polar coding techniques. In some cases, an encoder or decoder of a wireless device may assign information bits, frozen bits, and parity check bits to polar channels of an encoder or decoder based on reliability metrics. The information bits may initially be assigned and based on a channel index of the first information bit, the parity check bits may be assigned to channels having higher channel indices than the first information bit. After assignment, the bits may be encoded or decoded.