Industry-university Cooperation Foundation Hanyang University

Samsung Electronics Co., Ltd.

Snur & Db Foundation

Lg Electronics Inc.

Seoul National University

Soongsil University

Dongguk University Industry-academic Cooperation Foundation

Dong-Joon Shin

Jong-Seon No

Sung-Rae Kim

Xianglan Jin

Kwangseok Noh

Jae-Yong Lee

Jun-Jin Kong

Ji Ho Kim

Dong-Kyu Kim

Bong-Gee Song

Hong-Rak Son

Yun-Sang Park

Jiho Kim

Ki-Jun Lee

Hae-Dong Yeon

Hyung-June Kim

Hosung Park

Dae Woon Lim

Jin Soo Lim

Sung-Han Jung

Beomkyu Shin

Seokbeom Hong

Yong-Chun Piao

Hyeong-Gun Joo

Jae-Dong Yang

Disclosed is an encoding method of a spatially coupled-low density parity Check (SC-LDPC) code of a terminal. The encoding method of the SC-LDPC code of the present disclosure can comprise: a step of generating a plurality of decomposition matrices by decomposing a base matrix of a preset LDPC block code. a step of generating a base matrix of the SC-LDPC code by spatially coupling the plurality of decomposition matrices in accordance with the termination length. a step of generating a circulant shift value matrix from the base matrix of the SC-LDPC code. a step of generating a plurality of lifting values for the base matrix of the SC-LDPC code. and a step for encoding an input signal by using a generator matrix defined by using of the base matrix of the SC-LDPC code, the circulant shift value matrix, and the plurality of lifting values.

SC-LDPC code encoding method and device therefor

Disclosed is a method and apparatus for encoding an erasure code for storing data. The disclosed method for encoding an erasure code comprises the steps of: (a) generating a first local parity group including two or more local parity nodes for data nodes; (b) generating at least one global parity node for the data nodes; (c) generating at least one second local parity group including two or more local parity nodes for the data nodes; and (d) storing the data nodes, the first local parity group, the second local parity group, and the global parity node. According to the disclosed method, it is possible to store and recover data safely and efficiently.

Method and apparatus for encoding erasure code for storing data

Disclosed are an LDPC encoding/decoding method and a device using same. The method includes the steps of: (a) generating an information bit sequence by determining information bits to be encoded from among a group of information bits; (b) generating a modified information bit sequence by inserting a preset error floor prevention bit into at least one preset position in the information bit sequence; (c) generating a parity check bit on the basis of the modified information bit sequence; and (d) performing encoding by using the modified information bit sequence and the parity check bit. According to the disclosed method, performance degradation of LDPC encoding and decoding due to an error floor phenomenon can be prevented.

LDPC encoding/decoding method and device using same

Disclosed is a method for selecting a source transmit antenna in a cooperative multiple-input and multiple-output (MIMO) communication system including a source node, a relay node and a destination node. The method includes determining a source transmit antenna selection metric such that a source-destination channel, a source-relay channel and a relay-destination channel are related to one another, and selecting a positive integer number of antennas such that the source transmit antenna selection metric is maximized.

Method for selecting source transmit antenna in cooperative MIMO communication system

The present invention relates to a source antenna switching scheme for a non-orthogonal protocol; and more particularly, to a source antenna switching scheme for a non-orthogonal protocol, which transmits a signal of a source node to a destination node through a relay node. The present invention provides a source antenna switching scheme for a non-orthogonal decode-and-forward protocol that can acquire a greater diversity than the conventional NDF protocol. In other words, the present invention provides a source antenna switching scheme for a non-orthogonal decode-and-forward protocol that can increase a diversity order by adding a reasonable priced antenna instead of expensive hardware such as an RF chain when there are a plurality of antenna in the RF chain.

Source antenna switching scheme for non-orthogonal protocol

An encoding device includes an encoder and a puncturing unit. The encoder generates parity bits based on information bits. The puncturing unit punctures the parity bits based on a puncturing pattern complying with a first criterion determining a period of the puncturing pattern and a second criterion determining positions of remaining parity bits.

Encoding device, controller and system including the same

A method for a decoding device to decode a codeword matrix of a product code includes: generating a first extended parity check matrix for a vertical code; decoding a horizontal codeword of a plurality of rows in the codeword matrix to thus perform a first decoding process; generating a second extended parity check matrix by removing a column corresponding to a row of the first decoding-succeeded horizontal codeword from the first extended parity check matrix; and decoding the first decoding-failed horizontal codeword by using the second extended parity check matrix to thus perform a second decoding process. Therefore, the simple and reliable product code decoding method is provided.

Product code decoding method and device

A Low Density Parity Check (LDPC) code encoding apparatus for a communication system is provided. The encoding apparatus receives information bits, and generates an LDPC code by encoding the information bits using an interleaving scheme. The interleaving scheme is generated such that when the LDPC code is punctured, there is no short-length cycle in a Tanner graph of the punctured LDPC code.

Apparatus and method for encoding low density parity check codes in a communication system

A Peak-to-Average Power Ratio (PAPR) reduction apparatus and method in an OFDM communication system are provided. In the PAPR reduction method, magnitude and phase components are extracted from transmission sample data. Peaks having magnitude components exceeding a threshold are detected by comparing the extracted magnitude components with the threshold. The highest of the peaks is detected and compared with the threshold. If the highest peak is greater than the threshold, the highest peak is updated.

Apparatus and method for reducing peak-to-average power ratio in an OFDM communication system

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Seoul, South Korea

Dong-Joon Shin