Samsung Electronics Co., Ltd.

Yonsei University

Electronics and Telecommunications Research Institute

Hong-Yeop Song

Soon-Young Yoon

Hee-Won Kang

Young-Ky Kim

Jae-min Ahn

Jong-Seon No

Je-Woo Kim

Jae-Min Ahn

Ha-Bong Chung

Dong Seung Kwon

Jung-Hyun Kim

Byung-Jae Kwak

Wooram Shin

Jong-Hyeuk Lee

Young Seog Song

Seung-Hee Han

Choongil Yeh

Ji Hung Kim

Dae-son Kim

Min Sik Seo

Joon-Sung Kim

Seul-Ki Bae

Mi-Young Nam

Disclosed is a decoding method and device for low density parity check codes using dynamic scheduling. The low density parity check codes are sequentially decoded, and the messages are scheduled in the descending order of the difference between values before and after updating the message transmitted from the variable node to the check node.

Method for decoding using dynamic scheduling scheme for low density parity check codes and apparatus thereof

A method and apparatus for parallel structured Latin square interleaving in a communication system are provided. The method includes dividing input information bits into sub-blocks according to a parallel processing order, generating a first Latin square matrix or a second Latin square matrix by comparing the parallel processing order with a predetermined threshold, and interleaving by reading out the information bits divided into the sub-blocks according to the generated Latin square matrix.

Method and apparatus for parallel structured Latin square interleaving in communication system

There are provided spread spectrum signal generating devices and methods in a transmitter of a mobile communications system using a plurality of logical channels. In the spread spectrum signal generating devices, a multiplexer time multiplexes a pilot channel signal and a control channel signal which are output at substantially constant power levels. A first orthogonal encoder orthogonally spreads the output of the multiplexer with an orthogonal code. A second orthogonal encoder orthogonally spreads voice channel data of a variable bit rate with an orthogonal code. A third orthogonal encoder orthogonally spreads packet channel data of a variable bit rate with an orthogonal code. An IQ signal mapper adds the outputs of the first and third orthogonal encoders, outputs the added signal as a first channel signal, and outputs the output of the second orthogonal encoder as a second channel signal. A PN spreader spreads the first and second channel signals with PN codes and outputs a final spectrum spread signal, which exhibits a substantially minimized peak-to-average power ratio.

Spread spectrum signal generating device and method in transmitter of mobile communications system

A device and method for generating a pseudo-orthogonal code for use in orthogonally spreading channel data in a CDMA mobile communications system. M orthogonal codes are selected from N orthogonal codes, for forming a pseudo-orthogonal codes, and the elements of the selected M orthogonal codes are sequentially interlaced to generate the pseudo-orthogonal code as a sequence of M&times;N elements.

Device and method for generating spread spectrum signal using pseudo-orthogonal code in CDMA mobile communications system

Growing community of inventors

Seoul, South Korea

Hong-Yeop Song