Abstract: A method and apparatus of configuring a multi-cell precoding matrix for a multiple input multiple output (MIMO) operation in a wireless communication system in which a plurality of base stations participate in cooperative communication is provided. A multi-cell precoding matrix is configured using one or more single-cell precoding matrices, and wherein coefficients to be multiplied by the single-cell precoding matrices satisfy a condition in which the product between the multi-cell precoding matrix and a Hermitian matrix of the multi-cell precoding matrix is a unitary matrix. According to the embodiment of the present invention, it is not necessary for all base stations to perfectly know channel information. In addition, a feedback overhead is not high, and complexity is low.

Abstract: In a communication system, a signal transceiver generates an upper pre-encoding symbol stream and a lower pre-encoding symbol stream by pre-encoding an upper transmission vector and a lower transmission vector according to a pre-encoding scheme when the upper and lower transmission vectors to be transmitted are input. The signal transceiver generates a space-time mapping matrix by space-time mapping the upper and lower pre-encoding symbol streams according to a space-time mapping scheme based on the number of transmit antennas to be used in the signal transceiver. The signal transceiver generates and transmits a codeword according to whether a null transmission is present in the space-time mapping matrix.

Abstract: Provided is a composition for in vivo transplantation for the treatment of human cervical cancer, comprising mononuclear cells derived from umbilical cord blood and a pharmaceutically acceptable carrier. When the umbilical cord blood-derived mononuclear cells are transplanted in vivo, cervical cancer can be effectively treated. In particular, the mononuclear cells derived from the umbilical cord blood retain high differentiation and proliferation abilities and exhibit very low graft-versus-host (GVH) reactions which are side effects caused by transplantation, and thus, can be transplanted to many patients.

Abstract: The present invention relates, in general, to air cleaning apparatuses and, more particularly, to a ceiling-mounted air cleaning apparatus which can be conveniently installed and used as room ventilation equipment, which discharges contaminated indoor air to the outside a room and supplies fresh outdoor air to the interior of a room so as to maintain clean air in the interior of the room. The ceiling-mounted air cleaning apparatus of the present invention includes an upper casing (10), which is removably mounted to a ceiling, a lower casing (20), which is separably coupled to the upper casing, a filter unit (30), which is provided between the upper and lower casings, and a locking unit (40), which separably couples the upper and lower casings to each other.

Abstract: A method for transmitting channel information in a multi-antenna system, the method includes calculating channel quality information (CQI) with respect to each mode, comparing the CQI with respect to each mode to a threshold value with respect to each mode, and transmitting CQI with respect to a mode having higher CQI than the threshold value as channel information. Good performance can be achieved regardless of the number of users or an SNR of users.

Abstract: A method for transmitting data in a multi-antenna system includes determining a candidate mode in which a maximum upperbound approximation of an average total data rate is maximized as a transmission mode, selecting a user equipment to receive data by using the transmission mode, and transmitting data to the selected user equipment.

Abstract: In a communication system, a signal transceiver generates an upper pre-encoding symbol stream and a lower pre-encoding symbol stream by pre-encoding an upper transmission vector and a lower transmission vector according to a pre-encoding scheme when the upper and lower transmission vectors to be transmitted are input. The signal transceiver generates a space-time mapping matrix by space-time mapping the upper and lower pre-encoding symbol streams according to a space-time mapping scheme based on the number of transmit antennas to be used in the signal transceiver. The signal transceiver generates and transmits a codeword according to whether a null transmission is present in the space-time mapping matrix.

Abstract: The present invention provides a method of cloning a protein coding for a membrane protein without the need of using anyantibody or ligand. The method of cloning a membrane protein comprises selecting a protein having a signal sequence, using a DNA coding for the signal sequence and N-terminal sequence of the protein as the reporter gene, and screening for a gene for a protein having a transmembrane domain(s). The present invention is concerned also with the CDNA obtained by using such method, a vector containing the DNA, a transformant as transformed with the vector, and the transcription product of the DNA as produced by the transformant.