公开(公告)号：US20230198668A1

公开(公告)日：2023-06-22

申请号：US17996072

申请日：2020-04-24

Applicant: QUALCOMM Incorporated

Inventor： Kangqi Liu ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Hao Xu

IPC: H04L1/00

CPC classification number: H04L1/0064 ,  H04L1/0046 ,  H04L1/0041

Abstract: In one aspect of the disclosure, a method of wireless communication performed by a receiving device includes receiving, from a transmitting device, a plurality of encoded packets each including at least one respective physical (PHY) layer symbol. The method includes decoding the plurality of encoded packets based on a raptor code to generate received data. The method also includes determining a signal-to-interference-plus-noise ratio (SINR) associated with receiving the plurality of encoded packets, receiving an indication from the transmitting device, or determining a channel quality indicator (CQI) or a modulation and coding scheme (MCS) associated with receiving the plurality of encoded packets. The method further includes adaptively determining a PHY packet error rate associated with the plurality of encoded packets based on the SINR, the indication, the CQI, or the MCS. Other aspects and features are also claimed and described.

公开(公告)号：US11646823B2

公开(公告)日：2023-05-09

申请号：US16960494

申请日：2019-02-06

Applicant: QUALCOMM Incorporated

Inventor： Kai Chen ,  Liangming Wu ,  Changlong Xu ,  Jian Li ,  Hao Xu

IPC: H04L1/00 ,  H03M13/00

CPC classification number: H04L1/0073 ,  H04L1/0057 ,  H04L1/0061

Abstract: A method, apparatus, and computer-readable medium for transmitting coded messages to a receiving device including constructing a data vector including a plurality of data bits, transforming the data vector into a u-domain vector, applying a mask to the u-domain vector, encoding the masked u-domain vector with polar encoding to generate a transmission vector, and transmitting, to the receiving device, the transmission vector.

公开(公告)号：US11601217B2

公开(公告)日：2023-03-07

申请号：US16468210

申请日：2017-06-14

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Joseph Binamira Soriaga ,  Jilei Hou

IPC: H04L1/00 ,  H04L43/0823 ,  H04L69/324

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：US11387939B2

公开(公告)日：2022-07-12

申请号：US15733499

申请日：2019-01-17

Applicant: QUALCOMM Incorporated

Inventor： Kai Chen ,  Liangming Wu ,  Changlong Xu ,  Jian Li ,  Hao Xu

IPC: H04L1/00 ,  H04L1/18

Abstract: 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：US11309997B2

公开(公告)日：2022-04-19

申请号：US16874264

申请日：2020-05-14

Applicant: QUALCOMM Incorporated

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

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

Abstract: Polar codes may be generated with a variable block length utilizing puncturing. Some puncturing schemes consider punctured bits as unknown bits, and set the log likelihood ratio (LLR) for those bits to zero; while other puncturing schemes consider punctured bits as known bits, and set the LLR for those bits to infinity. Each of these puncturing schemes has been observed to provide benefits over the other under different circumstances, especially corresponding to different coding rates or different signal to noise ratio (SNR). According to aspects of the present disclosure, both puncturing schemes are compared, and the puncturing scheme resulting in the better performance is utilized for transmission.

公开(公告)号：US20220094471A1

公开(公告)日：2022-03-24

申请号：US17500347

申请日：2021-10-13

Applicant: Qualcomm Incorporated

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

IPC: H04L1/00 ,  H04L1/18

Abstract: 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 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：US11271631B2

公开(公告)日：2022-03-08

申请号：US17041052

申请日：2019-04-02

Applicant: Qualcomm Incorporated

Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Hao Xu

IPC: H04B7/06 ,  H04B17/336 ,  H03M13/13 ,  H04L1/00 ,  H04L1/18

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：US11265105B2

公开(公告)日：2022-03-01

申请号：US16464576

申请日：2017-06-02

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Jilei Hou

IPC: H04L1/00 ,  H04L1/18

Abstract: Methods and apparatuses for wireless communications are described. In an aspect, a method and apparatus may include determining that a second transmission is decoded incorrectly in response to a first received indication on a communication channel. The method and apparatus may further include transmitting, on the communication channel, a third transmission and a fourth transmission based on a determination that the second transmission is decoded incorrectly, wherein the third transmission corresponds to a coded bit set of the third transmission including a first group of information bits of a coded bit set of a first transmission and a second group of information bits of a coded bit set of the second transmission and the fourth transmission corresponds to a coded bit set of the fourth transmission including a combination of the coded bit sets of the first transmission, the second transmission, and the third transmission.

公开(公告)号：US11239947B2

公开(公告)日：2022-02-01

申请号：US17178012

申请日：2021-02-17

Applicant: Qualcomm Incorporated

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

IPC: H04L27/06 ,  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：US11218177B2

公开(公告)日：2022-01-04

申请号：US16317395

申请日：2017-06-12

Applicant: QUALCOMM Incorporated

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

IPC: H03M13/00 ,  H03M13/13 ,  H03M11/26

Abstract: Various aspects of the disclosure relate to rate matching techniques for block encoding. In some aspects, a decision regarding whether to use repetition-based rate matching or puncture-based rate matching is made based on a block size of information being encoded. In some aspects, repetition-based rate matching uses a bit-reversal permutation technique.