Samsung Electronics Co., Ltd.

Postech Foundation

Gyu Bum Kyung

Ho Rim Yang

Jae Wook Shim

Hong-Sil Jeong

Jae-Yoel Kim

Dong-seek Park

Chi-Woo Lim

Seung-Hoon Choi

Sung-Eun Park

Se-Ho Myung

Kyeong-Cheol Yang

Young-Kyun Kim

Kyeong Yeon Kim

Ki Taek Bae

A low density parity check (LDPC) decoder, including a memory configured to store a log-likelihood ratio (LLR) value of bits output from a demapper, and an LLR message exchanged between a variable node and an inspection node. The LDPC decoder further includes a node processor configured to select a decoding algorithm from a first algorithm and a second algorithm based on a code rate of an LDPC code, and decode the LLR message based on the selected decoding algorithm.

Low density party check (LDPC) decoder and method of decoding performed by LDPC decoder in digital video broadcasting (DVB) system

An apparatus and method for transmitting and receiving data based on a location is disclosed, the apparatus for receiving the data, for example, a data receiver includes a location predictor configured to predict a location of the receiver based on location information of the receiver, a data rate calculator configured to calculate a predicted data rate during an interval based on communication environment information corresponding to the location of the receiver and the predicted location, and a buffer configured to backlog data received in advance based on the predicted data rate.

Method and apparatus to transmit and receive data based on location

A method and apparatus to perform a soft demapping in a rotated quadrature amplitude modulation (QAM) based communication system is described. The method and the apparatus include pre-processing a symbol based on a priori information and performing a one-dimensional (1D) soft demapping on the pre-processed symbol, continuously.

Method and apparatus for soft demapping in rotated quadrature amplitude modulation (QAM) based communication system

An apparatus and a method are provided including a parameter estimator, a controller, an initial channel estimator, and a channel estimator. The parameter estimator configured to estimate parameters related to a channel. The controller configured to select one of channel environments based on the parameters, and generate a control signal corresponding to the selected channel environment. The initial channel estimator configured to estimate an initial channel based on the control signal. The channel estimator configured to estimate a channel of remaining resource blocks, excluding resource blocks corresponding to a pilot signal, from among resource blocks, based on the initial channel and the control signal.

Apparatus and method for adaptively estimating channel in orthogonal frequency division multiplexing (OFDM) system

Disclosed is an apparatus and a method for transmitting/receiving a signal in a communication system, which generates an Affine Permutation Matrix-Low Density Parity Check (APM-LDPC) codeword by encoding an information vector in an APM-LDPC encoding scheme which is a preset structured LDPC encoding scheme, and detects the information vector by decoding the signal in a decoding scheme corresponding to the APM-LDPC encoding scheme, thereby making it possible to generate a Low Density Parity Check (LDPC) code in the form of maximizing a girth while minimizing complexity.

Apparatus and method for transmitting/receiving signal in communication system

Growing community of inventors

Seoul, South Korea

Gyu Bum Kyung