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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
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.
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32.发明授权公开(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
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.
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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
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.
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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
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.
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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
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.
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Patent Agency Ranking
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
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.
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公开(公告)号：US11184116B2
公开(公告)日：2021-11-23
申请号：US16758549
申请日：2018-10-02
Applicant: QUALCOMM Incorporated
Inventor： Jian Li , Changlong Xu , Kai Chen , Liangming Wu , Jing Jiang , Hao Xu
Abstract: 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.
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公开(公告)号：US10862625B2
公开(公告)日：2020-12-08
申请号：US16476890
申请日：2018-02-17
Applicant: Qualcomm Incorporated
Inventor： Yang Yang , Jing Jiang , Changlong Xu , Gabi Sarkis , Chao Wei , Hari Sankar , Jian Li , Joseph Binamira Soriaga
Abstract: Techniques are described for wireless communication. One method includes identifying a set of punctured bit locations in a received codeword. The received codeword is encoded using a polar code. The method also includes identifying a set of information bit locations of the polar code, with the set of information bit locations being determined based at least in part on polarization weights per polarized bit-channel of a polar code decoder that are a function of nulled repetition operations per polarization stage of the polar code identified based at least in part on the set of punctured bit locations. The method further includes processing the received codeword using the polar code decoder to obtain an information bit vector at the set of information bit locations.
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公开(公告)号：US20200099393A1
公开(公告)日：2020-03-26
申请号：US16494621
申请日：2018-01-11
Applicant: Changlong XU , Jian LI , Liangming WU , Joseph Binamira SORIAGA , Jilei HOU , Qualcomm Incorporated
Inventor： Changlong Xu , Jian Li , Liangming Wu , Joseph Binamira Soriaga , Jilei Hou
Abstract: Methods, systems, and devices for wireless communication are described. A transmitter may generate a first segmentation based on a first subset of control information and a second segmentation based on jointly encoding the first subset and a second subset of the control information. The transmitter may polar encode the first segmentation to generate a first codeword and the second segmentation to generate a second codeword, and transmit the first and second codewords. A receiver may determine a first bit sequence corresponding to the first subset based on decoding a first codeword and determine an error detection code (EDC) and a second bit sequence corresponding to the second subset based on decoding a second codeword. The receiver may perform error detection on the first and second bit sequences based on the determined EDC, and output the first bit sequence and the second bit sequence or a decoding error.
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公开(公告)号：US20200036477A1
公开(公告)日：2020-01-30
申请号：US16493364
申请日：2018-04-18
Applicant: Changlong XU , Jian LI , Chao WEI , Jing JIANG , Jilei HOU , Qualcomm Incorporated
Inventor： Changlong Xu , Jian Li , Chao Wei , Jing Jiang , Jilei Hou
Abstract: 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.
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