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    METHOD AND DEVICE FOR PERFORMING RETRANSMISSION IN WIRELESS COMMUNICATION SYSTEM
    2.
    发明公开
    METHOD AND DEVICE FOR PERFORMING RETRANSMISSION IN WIRELESS COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：US20230396362A1

    公开(公告)日：2023-12-07

    申请号：US18034211

    申请日：2021-04-12

    Applicant: LG ELECTRONICS INC.

    Inventor： Jongwoong SHIN ,  Bonghoe KIM ,  Sung Ryong HONG

    IPC: H04L1/00 ,  H04L1/08 ,  H04L1/1812

    CPC classification number: H04L1/0063 ,  H04L1/1812 ,  H04L1/08

    Abstract: The present disclosure is for performing retransmission in a wireless communication system, and a method by which a first device operates in a wireless communication system comprises the steps of: receiving, from a second device, a first signal comprising outer- and inner-coded data; detecting information-bit-based first-type inner code blocks and parity-bit-based second-type inner code blocks by inner decoding the data in correspondence to the inner coding; confirming the location and the number of at least one bit with a possibility of error, among outer block codes, on the basis of the location of inner code blocks for which decoding has failed; deciding to request retransmission on the basis of the location and the number of the at least one bit; and requesting, to the second device, on the basis of the location and the number of the at least one bit, retransmission of at least one of an information portion or a parity portion of outer code blocks.

    METHOD FOR SELECTING LDPC BASE CODE IN MULTIPLE LDPC CODES AND APPARATUS THEREFOR
    4.
    发明申请
    METHOD FOR SELECTING LDPC BASE CODE IN MULTIPLE LDPC CODES AND APPARATUS THEREFOR 有权

    公开(公告)号：US20210167800A1

    公开(公告)日：2021-06-03

    申请号：US16065548

    申请日：2018-01-05

    Applicant: LG Electronics Inc.

    Inventor： Jongwoong SHIN ,  Bonghoe KIM ,  Jinwoo KIM ,  Kwangseok NOH ,  Ilmu BYUN

    IPC: H03M13/11 ,  H03M13/00

    Abstract: A method of encoding a quasi-cyclic low-density parity-check (QC LDPC) code supporting multiple base codes includes selecting a base code for generating a parity check matrix from among a first base code and a second base code, selecting a lifting value for generating the parity check matrix from among a plurality of lifting values, and generating the parity check matrix using the selected base code and the selected lifting value, wherein the base code is determined based on a code block size and a code rate, and the lifting value is determined based on a parameter of the base code and the code block size.

    APPARATUS AND METHOD FOR SENDING AND RECEIVING BROADCAST SIGNALS
    5.
    发明申请
    APPARATUS AND METHOD FOR SENDING AND RECEIVING BROADCAST SIGNALS 审中-公开

    公开(公告)号：US20200186287A1

    公开(公告)日：2020-06-11

    申请号：US16789745

    申请日：2020-02-13

    Applicant: LG ELECTRONICS INC.

    Inventor： Jongwoong SHIN ,  Woosuk KO ,  Jaehyung KIM ,  Jongseob BAEK ,  Sungryong HONG

    IPC: H04L1/00 ,  H04L27/26 ,  H04L1/04 ,  H04J11/00 ,  H04L12/18 ,  H04B1/10

    Abstract: A broadcast signal transmitter includes a first bit interleaver to bit interleave core layer data of at least one core layer Physical Layer Pipe (PLP) for a core layer; a second bit interleaver to bit interleave enhanced layer data of at least one enhanced layer PLP for an enhanced layer; an injection level controller to control power ratio between the bit-interleaved core layer data and the bit-interleaved enhanced layer data; a combiner to combine the core layer data and the enhanced layer data which the power ratio is controlled and to output Layered Division Multiplexing (LDM) data; a power normalizer to normalize power of the LDM data; a time interleaver to perform time-interleaving on the LDM data which the power is normalized; a framer to generate a signal frame comprising a preamble and the time-interleaved LDM data; and a modulator to perform Orthogonal Frequency Division Multiplexing modulation on the signal frame.

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