Electronics and Telecommunications Research Institute

Kwhang-Hyun Ryu

Sok-Kyu Lee

Yun-Joo Kim

Seung-Chan Bang

Il-Gu Lee

Yu-Ro Lee

Eun-Young Choi

Hee-Jung Yu

Chanho Yoon

Minho Cheong

Deuk-Su Lyu

Seung-Ku Hwang

Jung-Bo Son

Chan-Ho Yoon

Yoo-Seung Song

Jee-Yon Choi

Hyun-Gu Park

Tae-hyun Jeon

Seung-Wook Min

Je-Hun Lee

Kyoung-Ju Noh

Byung-Chan Kim

Cheol-Jung Kim

Tae-Hyun Jeon

Kyoung-Hee Song

Provided are a MAC method and a method for transmitting data using the same in a WLAN. The MAC method includes: transmitting a bandwidth scheduling report frame for informing information on downlinks and uplinks allocated to a terminal by including the bandwidth scheduling report frame in one of the downlinks where the bandwidth scheduling report frame includes a plurality of downlinks, a plurality of uplinks, and a plurality of short uplinks and the number of the plurality of downlinks is equal to the number of the plurality of uplinks; receiving a bandwidth request frame for requesting bandwidth allocation through one of the uplinks; and allocating a bandwidth to each of the terminals by an unit of the downlink and the uplink.

Medium access control method and data transmission method using the same in wireless local area network

Provided are a QR decomposition apparatus and method for a MIMO system. The QR decomposition apparatus includes: a norm calculator for calculating a vector size norm for a channel input; a Q column calculator for calculating a column value of a unitary matrix Q by multiplying a delayed channel input with &#x221a;{square root over (norm)}; an R row calculator for receiving the delayed channel input, the output of the Q column calculator, and 1/&#x221a;{square root over (norm)}, and calculating a row value of an upper triangular matrix R; a Q update calculator for receiving the delayed channel input, the output of the R row calculator, and a delayed output of the Q column calculator, and calculating a Q update matrix value; and a norm update calculator for receiving a delayed output of the norm calculator and an output of the R row calculator, and outputting a norm update matrix value.

QR decomposition apparatus and method for MIMO system

A digital system design method uses a higher programming language. In order to realize a digital system, an algorithm is verified based on a program written by the higher programming language and a program is programmed considering the higher programming language-hardware characteristics before the program is written in the lower programming language, and thus conversion into the lower programming language may be easily performed.

Method for digital system modeling by using higher software simulator

Growing community of inventors

Daejon, South Korea

Kwhang-Hyun Ryu