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    ENHANCED PUNCTURING AND LOW-DENSITY PARITY-CHECK (LDPC) CODE STRUCTURE
    21.
    发明申请
    ENHANCED PUNCTURING AND LOW-DENSITY PARITY-CHECK (LDPC) CODE STRUCTURE 审中-公开

    公开(公告)号：US20170331497A1

    公开(公告)日：2017-11-16

    申请号：US15593035

    申请日：2017-05-11

    Applicant: QUALCOMM Incorporated

    Inventor： Thomas Joseph RICHARDSON ,  Shrinivas KUDEKAR

    IPC: H03M13/11 ,  H03M13/00

    CPC classification number: H03M13/1174 ,  H03M13/036 ,  H03M13/1168 ,  H03M13/616 ,  H03M13/6362

    Abstract: Certain aspects of the present disclosure generally relate to techniques for enhanced puncturing and low-density parity-check (LDPC) code structure. A method for wireless communications by a transmitting device is provided. The method generally includes encoding a set of information bits based on a LDPC code to produce a code word, the LDPC code defined by a base matrix having a first number of variable nodes and a second number of check nodes; puncturing the code word according to a puncturing pattern designed to puncture bits corresponding to at least two of the variable nodes to produce a punctured code word; adding at least one additional parity bit for the at least two punctured variable nodes; and transmitting the punctured code word.

    FAST CONVERGING LOW-DENSITY PARITY-CHECK TECHNIQUES
    24.
    发明申请
    FAST CONVERGING LOW-DENSITY PARITY-CHECK TECHNIQUES 有权

    公开(公告)号：US20250062857A1

    公开(公告)日：2025-02-20

    申请号：US18450280

    申请日：2023-08-15

    Applicant: QUALCOMM Incorporated

    Inventor： Pinar SEN ,  Wei YANG ,  Jing JIANG ,  Gabi SARKIS ,  Thomas Joseph RICHARDSON

    IPC: H04L1/00 ,  H03M13/11

    Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may perform a lifting procedure on a base graph including multiple variable nodes and multiple check nodes to obtain a lifted graph. The lifting procedure may include replacing each edge between multiple variable nodes and multiple check nodes of the base graph with a respective identity matrices with respective circular shift values. The base graph may include a punctured variable node which corresponds to each of one or more check nodes of the plurality of check nodes via multiple edges. The transmitting device may encode multiple information nodes and multiple parity nodes according to the lifted graph. The transmitting device may transmit a signal including multiple information bits and multiple parity bits based on encoding the multiple information nodes and the multiple parity nodes.

    PARALLEL QDM ENCODING
    25.
    发明公开
    PARALLEL QDM ENCODING 审中-公开

    公开(公告)号：US20240223305A1

    公开(公告)日：2024-07-04

    申请号：US18563547

    申请日：2021-07-30

    Applicant: QUALCOMM Incorporated

    Inventor： Liangming WU ,  Ori SHENTAL ,  Thomas Joseph RICHARDSON ,  Kexin XIAO ,  Wei LIU ,  Changlong XU ,  Hao XU

    IPC: H04L1/00

    CPC classification number: H04L1/0041 ,  H04L1/0047

    Abstract: Certain aspects of the present disclosure provide a technique for parallel distribution matching (DM) encoding. A user equipment (UE) implements the technique to perform a first round of parallel DM encoding using k information bits as input by: 1) segmenting the k information bits into N blocks of information bits, and 2) encoding the N blocks of information bits in parallel with N DM blocks. Each of the N blocks outputs one or more encoded information bits in each of the NDM blocks, and a total number of information bits output by the N DM blocks is less than k. The UE then performs a second round of parallel DM encoding using k′ information bits that were not encoded in the first round of DM encoding. The second round of parallel DM encoding includes a same encoding process as implemented in the first round of parallel DC encoding.

    CODED SPREADING AND INTERLEAVING FOR MULTI-LEVEL CODING SYSTEMS
    27.
    发明公开
    CODED SPREADING AND INTERLEAVING FOR MULTI-LEVEL CODING SYSTEMS 审中-公开

    公开(公告)号：US20240072934A1

    公开(公告)日：2024-02-29

    申请号：US17822631

    申请日：2022-08-26

    Applicant: QUALCOMM Incorporated

    Inventor： Wei YANG ,  Jing JIANG ,  Thomas Joseph RICHARDSON ,  Gabi SARKIS

    IPC: H04L1/00

    CPC classification number: H04L1/0071 ,  H04L1/0003 ,  H04L1/0042

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may identify a first set of bits associated with a first set of modulation layers. The wireless communication device may interleave a second set of bits associated with a second set of modulation layers to obtain an interleaved second set of bits. The wireless communication device may generate a combined set of bits based at least in part on combining the second set of bits and at least a portion of the first set of bits. The wireless communication device may perform a transmission based at least in part on the combined set of bits and the second set of bits. Numerous other aspects are described.

    RATE 7/8 LOW-DENSITY PARITY-CHECK (LDPC) CODE
    30.
    发明申请
    RATE 7/8 LOW-DENSITY PARITY-CHECK (LDPC) CODE 有权

    公开(公告)号：US20210211143A1

    公开(公告)日：2021-07-08

    申请号：US17130162

    申请日：2020-12-22

    Applicant: QUALCOMM Incorporated

    Inventor： Thomas Joseph RICHARDSON ,  Dung Ngoc DOAN ,  Didier Johannes Richard VAN NEE ,  Lin YANG ,  Bin TIAN

    IPC: H03M13/25 ,  H03M13/00 ,  H03M13/37 ,  H03M13/11

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for encoding data for wireless transmissions. In one aspect, a wireless device may encode a number (M) of systematic bits for transmission to a receiving device. The systematic bits may be encoded using a low-density parity-check (LDPC) code to produce an LDPC codeword. The LDPC codeword may include a number (N) of codeword bits, including the M systematic bits and one or more parity bits. The wireless device may further puncture a number (K) of the codeword bits to produce a punctured codeword having a code rate M/(N−K)>5/6. The wireless device may transmit the N−K remaining codeword bits, over a wireless channel, to a receiving device.

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