Su Nam
Su Nam Kim, Seoul KR
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20100309998 | METHOD FOR TRANSMITTING PRECODED SIGNAL IN COLLABORATIVE MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATION SYSTEM - A method for transmitting a precoded signal in a collaborative multiple-input multiple-output (MIMO) communication system is described. A method for receiving a precoded signal in a MIMO communication system includes estimating, by a mobile station, channels for one or more base stations through signals received from the one or more base stations including a serving base station, transmitting precoding matrix indexes of the one or more base stations determined based on the estimated channels to the serving base station, and receiving signals precoded by the one or more base stations based on the precoding matrix index. | 12-09-2010 |
20110038436 | METHOD FOR TRANSMITTING AND RECEIVING DATA IN A COOPERATIVE MULTIPLE-INPUT MULTIPLE-OUTPUT MOBILE COMMUNICATION SYSTEM - A method for transmitting and receiving data in a cooperative Multiple-Input Multiple-Output (MIMO) mobile communication system is disclosed. The method includes selecting a transmission path for transmitting precoding-related feedback control information to one or more cooperative base stations operating in the cooperative MIMO mode, and transmitting the precoding-related feedback control information to the one or more cooperative base stations through the selected transmission path. | 02-17-2011 |
20110105164 | METHOD FOR AVOIDING INTER-CELL INTERFERENCE IN MULTI-CELL ENVIRONMENT USING MULTIPLE CODEBOOKS - A method is disclosed for avoiding inter-cell interference in a closed-loop multiple-input multiple-output (MIMO) system using a plurality of codebooks. A base station of a serving cell transmits information about codebooks used in an interfering cell among the plurality of codebooks to a mobile station. The transmission of the information may be made at the request of the mobile station. Alternatively, the mobile station may directly measure information about codebooks used in the interfering cell among the plurality of codebooks. The mobile station measures restricted precoding matrix indexes (PMIs) or requested PMIs based on the codebook information. The measured PMIs are transmitted to the interfering cell and are used to restrict the use of a PMI in the interfering cell. | 05-05-2011 |
20110142166 | METHOD OF FEEDBACK INFORMATION TRANSMISSION, METHOD AND APPARATUS OF DATA TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM HAVING MULTIPLE ANTENNAS - A method of data transmission in a wireless communication system having multiple antennas is disclosed. A method of data transmission from a transmitter of a wireless communication system which uses multiple antennas comprises receiving identification information of a precoding matrix from a receiver, the precoding matrix being selected from a codebook generated using a plurality of first matrixes generated by multiplying a discrete fourier transform (DFT) matrix by each of a plurality of phase shift matrixes; precoding data to be transmitted, by using a precoding matrix indicated by the identification information; and transmitting the precoded data to the receiver by using the multiple antennas. | 06-16-2011 |
Su Nam Kim, Gangneung-Si KR
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20090176810 | COMPOSITION FOR SKIN EXTERNAL APPLICATION CONTAINING GALLOCATECHIN GALLATE FOR MOISTURIZING EFFECT ON THE SKIN - The present invention relates to a composition for external skin application having a skin-moisturizing effect, which comprises gallocatechin gallate as an active ingredient. More particularly, the composition for external skin application comprises gallocatechin gallate as an active ingredient to activate peroxisome proliferator activated receptor isoform alpha (PPAR-α), to stimulate expression of filaggrin and involucrin that are skin-moisturizing factors, and thus to provide excellent anti-drying and skin-moisturizing effects. More particularly, the composition for external skin application may further comprise theobromine and quercetin in addition to gallocatechin gallate to maximize such effects. | 07-09-2009 |
20120010226 | Composition for skin external application containing gallocatechin gallate for moisturizing effect on the skin - The present invention relates to a composition for external skin application having a skin-moisturizing effect, which comprises gallocatechin gallate as an active ingredient. More particularly, the composition for external skin application comprises gallocatechin gallate as an active ingredient to activate peroxisome proliferator activated receptor isoform alpha (PPAR-α), to stimulate expression of filaggrin and involucrin that are skin-moisturizing factors, and thus to provide excellent anti-drying and skin-moisturizing effects. More particularly, the composition for external skin application may further comprise theobromine and quercetin in addition to gallocatechin gallate to maximize such effects. | 01-12-2012 |
Su Nam Kim, Anyang-Si Gyeongki-Do KR
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20120250560 | METHOD AND APPARATUS FOR TRANSMITTING FEEDBACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM CONTAINING A RELAY STATION - Provided are a method and apparatus for transmitting feedback information in a wireless communication system containing a relay station. A subband is divided by a plurality of partitions, and the relay station measures feedback information for each of the partitions, and transmits feedback information measured for each of the partitions cyclically at a predetermined interval. Each partition can be a physical resource unit (PRU), and one PRU contains 18 subcarriers. Feedback information for each partition can be cyclically transmitted in the order fixed in the subband. | 10-04-2012 |
Su Nam Kim, Anyang-Si Gyeonggi-Do KR
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20120282966 | CHANNEL QUALITY INFORMATION TRANSMISSION METHOD IN WIRELESS COMMUNICATION SYSTEM ADOPTING COORDINATED MULTI-POINT SCHEME AND AN APPARATUS THEREFOR - The present invention relates to a channel quality information transmission method in a communication system adopting a coordinated multi-point scheme. A terminal receives signals, through the same band, from a serving base station and at least one neighbor base station, respectively, which are included in a CoMP set operating in a joint processing mode. Next, the terminal generates combined channel quality information on a single signal obtained by combining the signals received through the same band, and then transmits the information to the serving base station. The combined channel quality information is generated using information on a combined channel obtained by combining channels between the terminal and the serving base station and between the terminal and each one of the at least one neighbor base station, which are included in the CoMP set. | 11-08-2012 |