Samsung Electronics Co., Ltd.

Korea University Industrial Academic Collaboration Foundation

Seoul National University

Osong Medical Innovation Foundation, Korea University Research and Business Foundation

Dongkook Pharmaceutical Co., Ltd.

In-Kyu Lee

Soon-Young Yoon

Sung-Ho Lee

Keun-Chul Hwang

Heun-Chul Lee

Seok-Hwan Park

Young-Soo Kim

Kyung-Hun Jang

Dong-jun Lee

Chae-Man Lim

Hyo-Sun Hwang

Sung-Woo Kim

Jung-Hoon Suh

Jin-Seong Kim

Kyoung-Jae Lee

Kyung-Hoi Cha

Woo-Yeun Kim

Hyung-Bum Kim

Min-Hee Sung

Young-Min Song

Deok-Joong Youn

Ho-Myeung Ryu

Kang-Hee Lee

Dae-Sung Lim

Hyun-Ki Paeng

Kang-Hee 1102 Juyoun Apt Gwanghyewon-Ri Lee

Deok-Joong 709 104Dong Daewon Apt Youn

Kyung-Hoi 401 106Dong Cha

Sung-Woo 1512 101Dong Seongsu 2 Woobang Apt Kim

Dae-Sung 207 103Dong Deokil Apt Lim

An apparatus and a method for improving nonlinearity of a power amplifier in a wireless communication system are provided. A transmission apparatus in a wireless communication system comprises: at least one processor; a transceiver; and an amplifier for amplifying a signal provided from the transceiver, wherein if a power of a signal inputted into the transceiver is smaller than a reference value, the transceiver attenuates the power of the signal based on a gain compensation value corresponding to the power of the signal.

Apparatus and method for improving nonlinearity of power amplifier in wireless communication system

Provided is an apparatus and method for transmitting a channel sounding signal from a user terminal in a multiple antenna system. In the method, a channel for each of a plurality of antennas is estimated. The receiving signal power of each of the antennas is calculated using the channel information obtained through the channel estimation. The antenna with the highest RX signal power is selected. Therefore, it is possible to enhance the signal reception performance of the user terminal.

Apparatus and method for transmitting channel sounding signal in wireless communication system

An apparatus and a method for determining an optimum integer perturbation vector of a low complexity in a multiple antenna system include a transmitter that transmits data using an optimum integer perturbation vector of a low complexity in a multiple antenna system includes a module pre-processor, a shift pre-processor, and a precoder. The modulo pre-processor adds an integer perturbation vector to a transmission signal vector. The shift pre-processor phase-shifts a pseudo inverse matrix of a channel matrix using a phase angle. The precoder precodes a transmission signal vector perturbed by the integer perturbation vector using the phase-shifted pseudo inverse matrix of the channel matrix.

Apparatus and method for determining optimum integer perturbation vector of low complexity in multiple antenna system

An apparatus for decomposing a channel in a closed-loop Multiple Input Multiple Output (MIMO) communication system is provided. The channel decomposition apparatus includes a transmitter for preceding input symbols using a first matrix which is a product of a unitary matrix V, a diagonal matrix &#x3a6; and a blockwise Uniform Channel Decomposition (UCD) matrix P, before outputting the input symbols.

Method and apparatus for decomposing channel in closed-loop multiple input multiple output communication system

An apparatus and method for detecting a signal in a Multiple-Input Multiple-Output (MIMO) system are provided. The method includes filtering each stream of a received signal, acquiring a new search space by acquiring a set of candidates having reliability greater than a threshold with respect to each filtered stream, and detecting a signal for each stream of the new search space.

Apparatus and method for detecting signal in MIMO system

A method for selecting an antenna in an orthogonalized spatial multiplexing system. Upon receipt of at least one symbol from a transmitter via multiple receive antennas, a receiver decodes each of the received symbols; determines a rotation angle between the received symbols, and selects an optimal subset of transmit antennas using a distance between vectors of the decoded symbols; generates feedback information including the determined rotation angle and the selected optimal subset, and transmits the generated feedback information to the transmitter. Upon receipt of the feedback information, the transmitter beam-forms an antenna corresponding to the optimal subset depending on the received feedback information, and transmits a data symbol to the receiver. The receiver detects each of data symbols received from the transmitter.

Apparatus and method for selecting antenna in an orthogonalized spatial multiplexing system

An apparatus for coding a pseudo orthogonal space-time block code in a transmitter using 4 transmission antennas of first to fourth transmission antennas. Upon receiving information symbol streams xxxxto be transmitted, a serial-to-parallel converter parallel-converts the received information symbol streams xxxxinto x,x,x,x. A pseudo orthogonal space-time block coding (PO-STBC) encoder codes the parallel-converted information symbol streams x,x,x,xusing a pseudo orthogonal space-time block coding scheme such that the information symbol streams x,x,x,xare transmitted via corresponding transmission antennas for first to fourth time periods.

Apparatus and method for coding/decoding pseudo orthogonal space-time block code in a mobile communication system using multiple input multiple output scheme

Disclosed is a method of producing teicoplanin. The method includes purifying teicoplanin from a culture broth, obtained by culturing microorganisms capable of producing teicoplanin by a porous adsorption resin under selective elution conditions and recovering highly pure teicoplanin using activated carbon and/or ultrafiltration. In this regard, the method can further include ultrafiltration as pre-treatment before the culture broth is adsorbed into the porous adsorption resin so as to increase the purity of teicoplanin.

Method of producing teicoplanin

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Seoul, South Korea

In-Kyu Lee