Samsung Electronics Co., Ltd.

Sungkyunkwan University

Postech Academy-industry Foundation

Postech Foundation

Chonnam National University

Postech Research and Business Development Foundation

Dong-seek Park

Young-kwon Cho

Chan-byoung Chae

Marcos Daniel Katz

Hong-sil Jeong

Hong-Sil Jeong

Se-ho Myung

Kyung-joong Kim

Daniel Ansorregui Lobete

Belkacem Mouhouche

Jae-Yoel Kim

Seho Myung

Hyun-Koo Yang

Se-Ho Myung

Sung-Ryul Yun

Hak-Ju Lee

Kyungjoong Kim

Sung-ryul Yun

Min Jung Jang

Kyeong-Cheol Yang

Seokki Ahn

Yeon-Ju Lim

Hwan-Joon Kwon

Sung-Eun Park

Seung-Hoon Choi

Min Hee Jang

Chan-Byoung Chae

Ismael Gutierrez

Alain Mourad

Chi-Woo Lim

Jong-Hwan Kim

Sang-Hyo Kim

Won-Il Roh

Seok-Ki Ahn

Jin-Hee Jeong

Pan-Yuh Joo

Young-Ho Kim

Seung-Joo Maeng

Young-Kwon Cho

Jae-Ho Jeon

Jonghwan Kim

Young-Ho Jung

Jiwon Park

Hak-ju Lee

Seung-Hoon Nam

Jae-Hak Chung

Jeongho Yeo

Young-soo Park

Jung-pil Yu

Peter Jung

Hyo-Jin Lee

Young-Soo Park

Gyu-Bum Kyung

Jaeyoel Kim

Ansorregui Daniel Lobete

Jeong-Tae Oh

Kyun-Byoung Ko

Dong-Seek Park

Belkacem Mouhouce

Kyung-Joong Kim

Kyeongcheol Yang

Daehyeon Ryu

Jin-hee Jeong

Jae-Yeol Kim

Katz Marcos Daniel

Dae-hyun Ryu

Young-Kyun Kim

Sanghyo Kim

Hyuntack Lim

Daeyeol Yang

Thierry Lestable

Hosung Park

Hyun-Gu Yang

Hyun-jae Lee

Jae-Hyeon Bae

Hayoung Yang

Chang-Ho Suh

Dong-Min Shin

Chan-Soo Hwang

Seok-Hyun Yoon

Joohyun Lee

Joo-sung Park

Yangsoo Kwon

Myung-Kwang Byun

Jung-hyun Park

Myung-Kyu Lee

Daniel Ansorregui

Hyunjae Lee

Seok Hyun Yoon

Hyosang Ju

Jae Yoel Kim

Sung Ryul Yun

Jung-Il Han

Gyu Bum Kyung

Seung-Chan Lim

Yeonjoon Choi

Soon-chan Kwon

Alain Abdel-Majid Mourad

Young-Uk Do

Hyeon-Koo Yang

Hyeon-Gu Yang

A transmitter is provided. The transmitter includes: a Low Density Parity Check (LDPC) encoder configured to encode outer-encoded bits to generate an LDPC codeword including LDPC information bits and parity bits; a puncturer configured to puncture some of the parity bits included in the LDPC codeword; and a mapper configured to map the LDPC codeword except the punctured parity bits to symbols for transmission to a receiver, wherein the puncturer calculates a number of parity bits to be punctured among the parity bits included in the LDPC codeword based on a number of the outer-encoded bits, a number of the LDPC information bits, and a minimum number of parity bits to be punctured among the parity bits included in the LDPC codeword.

Transmitter and puncturing method thereof

A transmitting apparatus is provided. The transmitting apparatus includes: an encoder configured to generate a low-density parity check (LDPC) codeword by LDPC encoding of input bits based on a parity check matrix including information word bits and parity bits, the LDPC codeword including a plurality of bit groups each including a plurality of bits; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol, wherein the interleaver is further configured to interleave the LDPC codeword such that a bit included in a predetermined bit group from among the plurality of bit groups constituting the LDPC codeword onto a predetermined bit of the modulation symbol.

Transmitting apparatus and bit interleaving method thereof

A transmitting apparatus is provided. The transmitting apparatus includes: an encoder configured to generate a low-density parity check (LDPC) codeword by LDPC encoding based on a parity check matrix; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol, wherein the modulator is further configured to map a bit included in a predetermined bit group from among a plurality of bit groups constituting the LDPC codeword onto a predetermined bit of the modulation symbol.

Transmitting apparatus and interleaving method thereof

A transmitting apparatus is disclosed. The transmitting apparatus includes an encoder to perform channel encoding with respect to bits and generate a codeword, an interleaver to interleave the codeword, and a modulator to map the interleaved codeword onto a non-uniform constellation according to a modulation scheme, and the constellation may include constellation points defined based on various tables according to the modulation scheme.

Transmitting apparatus and mapping method thereof

A method for channel encoding in a communication or broadcasting system is provided. The method includes determining a block size Z, and performing encoding based on the block size and a first matrix corresponding to the block size, wherein the first matrix is determined based on information and a plurality of second matrices, and wherein a part of a column index indicating a position of a non-zero element in each row of the information includes an index according to mathematical expression 22 above.

Apparatus and method for channel encoding/decoding in communication or broadcasting system

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and a method for channel encoding and decoding in a communication or broadcasting system is provided. According to the present disclosure, the method for channel encoding in a communication or broadcasting system includes determining a block size Z, and performing encoding based on the block size and a parity check matrix corresponding to the block size, in which the block size is included in any one of the plurality of block size groups and the parity check matrix is different for each block size group.

The disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). An operating method of a user equipment (UE) in a communication system includes performing radio resource control (RRC) signaling with a base station, determining a code rate based on an RRC configuration according to the RRC signaling, and determining a size of data using the code rate.

Apparatus and method for transmitting control information in communication system

A pre-5th-generation (pre-5G) or 5G communication system for supporting higher data rates beyond a 4th-generation (4G) communication system, such as long term evolution (LTE) is provided. A channel encoding method in a communication or broadcasting system includes identifying an input bit size, determining a block size (Z), determining a low density parity check (LDPC) sequence to perform LDPC encoding, and performing the LDPC encoding based on the LDPC sequence and the block size.

Method and apparatus for channel encoding and decoding in communication or broadcasting system

A transmitter is provided. The transmitter includes: a Low Density Parity Check (LDPC) encoder configured to encode input bits to generate parity bits; a parity permutator configured to group-wise interleave a plurality of bit groups including the parity bits; and a puncturer configured to select some of the parity bits in the group-wise interleaved bit groups and puncture the selected parity bits, wherein the parity permutator group-wise interleaves the bit groups such that some of the bit groups at predetermined positions in the bit groups before the group-wise interleaving are positioned serially after the group-wise interleaving and a remainder of the bit groups before the group-wise interleaving are positioned without an order after the group-wise interleaving so that the puncturer selects parity bits included in the some of the bit groups sequentially and selects parity bits included in the remainder of the bit groups without an order.

Transmitter and parity permutation method thereof

A transmitter is provided. The transmitter includes: an outer encoder configured to encode input bits to generate outer-encoded bits including the input bits and parity bits; a zero padder configured to generate a plurality of bit groups each of which is formed of a same number of bits, determine whether a number of the outer-encoded bits satisfies a predetermined number of bits required according to at least one of a code rate and a code length for Low Density Parity Check (LDPC) encoding, pads zero bits to some of the bits in the bit groups if the number of the outer-encoded bits is less than the predetermined number of bits, and maps the outer-encoded bits to remaining bits in the bit groups, based on a predetermined shortening pattern, thereby to constitute LDPC information bits; and an LDPC encoder configured to encode the LDPC information bits, wherein the some of the bits, in which zero bits are padded, are included in some of the bit groups which are not sequentially disposed in the LDPC information bits.

Transmitter and shortening method thereof

A signal receiving method include: demodulating a signal received from a transmitting apparatus to generate values based on 1024-quadrature amplitude modulation (QAM); splitting the values into a plurality of groups; deinterleaving the plurality of groups based on a preset interleaving order; and decoding values of the deinterleaved plurality of groups based on a low density parity check (LDPC) code, a code rate of the LDPC code being 6/15 and a code length of the LDPC code being 64800, wherein the plurality of groups are deinterleaved based on a predetermined equation.

Method and apparatus for signal receiving and deinterleaving

A method for generating a non-uniform constellation is provided. The method comprises the step of performing a first process, the first process comprising the steps of: obtaining a first constellation defined by one or more parameter values; and generating a second constellation based on the first constellation using a second process. The second process comprises the steps of: obtaining a set of candidate constellations, wherein the set of candidate constellations comprises the first constellation and one or more modified constellations, wherein each modified constellation is obtained by modifying the parameter values defining the first constellation; determining the performance of each candidate constellation according to a predetermined performance measure; selecting the candidate constellation having the best performance as the second constellation.

Non-uniform constellations

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure discloses a method for effective retransmission when HARQ is applied to data encoded with a low density parity check (LDCP) code. A data transmission method of the transmitter may include: initially transmitting data encoded with an LDPC code to a receiver; receiving a negative acknowledgement (NACK) from the receiver; determining retransmission related information for data retransmission; and retransmitting, in response to the NACK, LDPC-encoded data based on the retransmission related information.

Apparatus and method of transmission using HARQ in communication or broadcasting system

Growing community of inventors

Seoul, South Korea

Hong-Sil Jeong