公开(公告)号：US20200036477A1

公开(公告)日：2020-01-30

申请号：US16493364

申请日：2018-04-18

申请人： Changlong XU ,  Jian LI ,  Chao WEI ,  Jing JIANG ,  Jilei HOU ,  Qualcomm Incorporated

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

IPC分类号： H04L1/00 ,  H04B7/26 ,  H03M13/09 ,  H03M13/13 ,  G06F9/30 ,  H04W40/02

摘要： 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：US11171672B2

公开(公告)日：2021-11-09

申请号：US16471388

申请日：2018-01-16

申请人： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou ,  Jing Jiang ,  QUALCOMM Incorporated

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

IPC分类号： H03M13/35 ,  H03M7/30 ,  H03M13/09 ,  H03M13/13 ,  H03M13/29 ,  H04L1/00

摘要： Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for dynamic frozen polar codes, for example, for control channels. An exemplary method may be performed at the encoder. The method generally includes encoding a stream of bits using a polar code. The encoding includes selecting a first set of channel indices for encoding information bits. The encoding includes selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits. The encoding includes selecting remaining channel indices for dynamic frozen (PCF) bits having values based on one or more of the information bits. The method includes transmitting the encoded stream of bits.

公开(公告)号：US20210135783A1

公开(公告)日：2021-05-06

申请号：US16487050

申请日：2017-12-14

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

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

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

摘要： 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：US11057151B2

公开(公告)日：2021-07-06

申请号：US16487050

申请日：2017-12-14

申请人： QUALCOMM Incorporated ,  Yang Yang ,  Jing Jiang ,  Gabi Sarkis ,  Chao Wei ,  Jian Li ,  Changlong Xu ,  Hari Sankar ,  Joseph Binamira Soriaga

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

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

摘要： 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：US20200099469A1

公开(公告)日：2020-03-26

申请号：US16467463

申请日：2017-12-07

申请人： Jing JIANG ,  Gabi SARKIS ,  Yang YANG ,  Shrinivas KUDEK ,  Josph Binamira SORIAGA ,  Hari SANKAR ,  Changlong XU ,  Chao WEI ,  Shrinivas KUDEKAR ,  Qualcomm Incorporated

发明人： Jing Jiang ,  Gabi Sarkis ,  Yang Yang ,  Shrinivas Kudekar ,  Joseph Binamira Soriaga ,  Hari Sankar ,  Changgiong Xu ,  Chao Wei

IPC分类号： H04L1/00

摘要： 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：US11171739B2

公开(公告)日：2021-11-09

申请号：US16763304

申请日：2018-10-26

申请人： Qualcomm Incorporated ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

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

IPC分类号： H04L1/00 ,  H04L1/18

摘要： 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 In 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：US20210050865A1

公开(公告)日：2021-02-18

申请号：US16968920

申请日：2019-02-14

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

发明人： Jian Li ,  Changlong Xu ,  Liangming Wu ,  Kai Chen ,  Hao Xu ,  Jing Jiang ,  Joseph Binamira Soriaga

IPC分类号： H03M13/13 ,  H04L1/08 ,  H04L1/00

摘要： Methods, systems, and devices for wireless communications are described. A transmitting device, such as a base station or a user equipment (UE), may generate a first set of encoded bits using a polar code. The transmitting device may transmit the first set of encoded bits to a receiving device, but the receiving device may unsuccessfully receive the transmission. The transmitting device may prepare a retransmission by generating a second set of encoded bits. In some cases, the transmitting device may copy information bits from the first transmission to polarized channels when generating the polar code for the retransmission. The transmitting device may copy information bits based on how the information bits were assigned for the first transmission as well as the block length. The transmitting device may copy information bits such that the retransmission is self-decodable.

公开(公告)号：US11646828B2

公开(公告)日：2023-05-09

申请号：US17045371

申请日：2019-04-04

申请人： Qualcomm Incorporated ,  Jian Li ,  Changlong Xu ,  Jing Jiang ,  Kai Chen ,  Liangming Wu ,  Hao Xu

发明人： Jian Li ,  Changlong Xu ,  Jing Jiang ,  Kai Chen ,  Liangming Wu ,  Hao Xu

IPC分类号： H04L1/18 ,  H04L1/00 ,  H04L1/1812

CPC分类号： H04L1/1812 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0063 ,  H04L1/0067

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：US11228394B2

公开(公告)日：2022-01-18

申请号：US16765066

申请日：2018-09-24

申请人： Kai Chen ,  Changlong Xu ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu ,  Qualcomm Incorporated

发明人： Kai Chen ,  Changlong Xu ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

IPC分类号： H04L1/00 ,  H03M13/45

摘要： Methods, systems, and devices for wireless communications are described. In some systems, wireless devices may encode and decode transmissions using polar codes. A transmitting device may encode a payload based on a selected payload size. For example, the transmitting device may construct a bit vector including payload bits, parity bits, frozen bits, or some combination of these, and may modify the bits or the order of the bits based on the selected payload size. The device may generate a polar-encoded codeword based on this bit vector, and may transmit the polar-encoded codeword to a receiving device. The receiving device may blind decode the polar-encoded codeword, and may determine the correct payload size based on the decoded bit vector. For example, the device may perform decoding or may check decoded bits based on a payload size hypothesis, where the decoding may fail for any incorrect payload size hypothesis.

公开(公告)号：US11146296B2

公开(公告)日：2021-10-12

申请号：US15733711

申请日：2019-04-02

申请人： QUALCOMM Incorporated ,  Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jing Jiang ,  Hao Xu

发明人： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jing Jiang ,  Hao Xu

IPC分类号： H03M13/45 ,  H03M13/00 ,  H03M13/13 ,  H03M13/43 ,  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.