Nam-Shik
Nam-Shik Kim, Yongin-Si KR
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20090041095 | METHOD AND APPARATUS FOR FINE FREQUENCY SYNCHRONIZATION IN WIRELESS BROADBAND (WIBRO) SYSTEM WITHOUT USING GLOBAL POSITIONING SYSTEM (GPS) RECEIVER - Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a frequency offset, in a base station or a wireless repeater without using a GPS receiver. The fine frequency synchronization method includes: (a) performing despreading on received adjacent subcarrier sequences, using a PN sequence transmitted from a transmitting party; (b) obtaining ratios of correlative values obtained by the despreading; and (c) estimating a frequency offset on the basis of the ratio of correlative values. Accordingly, fine frequency offset estimation with relatively low complexity is possible without using a GPS receiver in a WiBro environment where interference signals of other base stations or repeaters exist. | 02-12-2009 |
20090041097 | APPARATUS AND METHOD FOR NETWORK-CODING - Provided are a network-coding apparatus and method which can increase a data communication capacity in a communication environment to which an error-correction code (ECC) is applied. The network-coding apparatus includes a received signal processing unit receiving at least two signals, and decoding the at least two received signals; and a transmission signal processing unit receiving the at least two decoded signals from the received signal processing unit, merging the at least two decoded signals, and generating a merged transmission signal. | 02-12-2009 |
Nam-Shik Kim, Seoul KR
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20140059401 | HARD-DECISION DECODING METHOD AND LOW-DENSITY PARITY-CHECK DECODER USING SAME - A hard-decision decoding method includes performing operations necessary for first updating of a check node while loading data, which is input to a decoder, to an input buffer; first updating the check node by using a result of the performing of the operations after storing data, corresponding to one codeword, to the input buffer; and performing low-density parity check (LDPC) decoding by using a result of the first updating of the check node. | 02-27-2014 |
20140101513 | METHOD OF OPERATING CYCLIC REDUNDANCY CHECK IN MEMORY SYSTEM AND MEMORY CONTROLLER USING THE SAME - A method of performing a cyclic redundancy check (CRC) operation in a memory system, and a memory controller that uses the same. The method includes initializing a linear feed-back shift register (LFSR) circuit in a CRC polynomial, generating CRC parity information with respect to input data to be stored in a memory device by using the LFSR circuit, and generating a CRC code with respect to the input data based on the CRC parity information, such that the initialization of the LFSR circuit is set such that a register initial value of the LFSR circuit is determined to satisfy a condition that, when data input to the LFSR circuit is first state information, the CRC parity information generated from the LFSR circuit is second state information. | 04-10-2014 |
Nam-Shik Park, Daejeon KR
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20120158282 | CAMERA-BASED INDOOR POSITION RECOGNITION APPARATUS AND METHOD - A camera-based indoor position recognition apparatus includes: a floor capturing unit capturing a floor image by controlling a camera installed on a ceiling of an indoor space; a grid map generator constructing a grid map including cell images and position values by dividing the captured floor image into cells of a predetermined size and assigning the position values to the cells; a transceiver performing a data communication with a robot in the indoor space; and a controller providing an identifier-registration and a current position-information to the robot in accordance with an identifier-registration-requesting message and a position-information-requesting message of the robot, wherein the identifier-registration-requesting message and the position-information-requesting message of the robot are delivered from the transceiver. | 06-21-2012 |
20120268580 | PORTABLE COMPUTING DEVICE WITH INTELLIGENT ROBOTIC FUNCTIONS AND METHOD FOR OPERATING THE SAME - Disclosed is a portable computing device with intelligent robotic functions, including: an input projector providing a user interface screen for user input and mounted with a camera for capturing and recognizing a user behavior on the user interface screen; a main board recognizing a user command according to the user behavior and generating service and contents according to the user command; and an output projector outputting the generated contents. | 10-25-2012 |
Nam-Shik Song, Gyeonggi-Do KR
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20120139879 | CAPACITIVE STYLUS PEN - A capacitive stylus pen for a portable terminal includes a body portion formed of a synthetic resin material extending in a longitudinal direction; a sensing member provided in an inner side of the body portion to sense a current of a human's body; a transferring member formed of a conductive material and provided in an end of the body portion to be connected to the sensing member, and a manipulating member provided in an end of the transferring member, wherein the manipulating member is manufactured of conductive rubber and contacts a touch screen according to user's manipulation, and a Near Field Communication (NFC) is embedded in the body portion to perform wireless communication with the portable terminal, thereby configuring a wireless headset with the capacitive stylus pen. | 06-07-2012 |