Patents by Inventor Gin-Kyu Choi
Gin-Kyu Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8303750Abstract: The present invention relates to a method for manufacturing an air mat that reduces a thickness of a cushion part by means of both slush molding and rotational molding, enhances a bonding efficiency between a lower sheet and the cushion part, and obviates the need of any separate communicating members for forming the communicating passageways for a plurality of air pockets of the cushion part, thereby simplifying manufacturing processes.Type: GrantFiled: September 14, 2007Date of Patent: November 6, 2012Assignee: Ceragem Co., LtdInventors: Dong-Gyu Im, Gin-Kyu Choi
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Patent number: 8052409Abstract: The present invention relates to a method for manufacturing an air mat that reduces the number of manufacturing processes by means of rotational molding, while preventing the generation of defective products, to a device for molding an air mat, and to an air mat manufactured and molded by the method and device. In a method for manufacturing an air mat formed in such a manner as to integrally couple a cushion part having a plurality of air bags arranged therein for containing air at the insides thereof with a plate-shaped lower sheet disposed on the lower surface of the cushion part, the method includes the steps of: preparing a lower mold having a plurality of air bag molding recesses having given depths arranged at given intervals thereon, for molding the cushion part of the air mat.Type: GrantFiled: September 2, 2010Date of Patent: November 8, 2011Assignee: Ceragem Co., LtdInventors: Dong-gyu Im, Gin-kyu Choi
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Publication number: 20100325808Abstract: The present invention relates to a method for manufacturing an air mat that reduces the number of manufacturing processes by means of rotational molding, while preventing the generation of defective products, to a device for molding an air mat, and to an air mat manufactured and molded by the method and device. In a method for manufacturing an air mat formed in such a manner as to integrally couple a cushion part having a plurality of air bags arranged therein for containing air at the insides thereof with a plate-shaped lower sheet disposed on the lower surface of the cushion part, the method includes the steps of: preparing a lower mold having a plurality of air bag molding recesses having given depths arranged at given intervals thereon, for molding the cushion part of the air mat.Type: ApplicationFiled: September 2, 2010Publication date: December 30, 2010Applicant: CERAGEM CO., LTD.Inventors: Dong-gyu IM, Gin-kyu CHOI
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Publication number: 20100330222Abstract: The present invention relates to a method for manufacturing an air mat that reduces the number of manufacturing processes by means of rotational molding, while preventing the generation of defective products, to a device for molding an air mat, and to an air mat manufactured and molded by the method and device. In a method for manufacturing an air mat formed in such a manner as to integrally couple a cushion part having a plurality of air bags arranged therein for containing air at the insides thereof with a plate-shaped lower sheet disposed on the lower surface of the cushion part, the method includes the steps of: preparing a lower mold having a plurality of air bag molding recesses having given depths arranged at given intervals thereon, for molding the cushion part of the air mat.Type: ApplicationFiled: September 2, 2010Publication date: December 30, 2010Applicant: CERAGEM CO., LTD.Inventors: Dong-gyu IM, Gin-kyu CHOI
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Patent number: 7807095Abstract: The present invention relates to a method for manufacturing an air mat that reduces the number of manufacturing processes by means of rotational molding, while preventing the generation of defective products, to a device for molding an air mat, and to an air mat manufactured and molded by the method and device. In a method for manufacturing an air mat formed in such a manner as to integrally couple a cushion part having a plurality of air bags arranged therein for containing air at the insides thereof with a plate-shaped lower sheet disposed on the lower surface of the cushion part, the method includes the steps of: preparing a lower mold having a plurality of air bag molding recesses having given depths arranged at given intervals thereon, for molding the cushion part of the air mat.Type: GrantFiled: March 3, 2006Date of Patent: October 5, 2010Assignee: Ceragem Co., LtdInventors: Dong-gyu Im, Gin-kyu Choi
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Publication number: 20100243143Abstract: The present invention relates to a method for manufacturing an air mat that reduces a thickness of a cushion part by means of both slush molding and rotational molding, enhances a bonding efficiency between a lower sheet and the cushion part, and obviates the need of any separate communicating members for forming the communicating passageways for a plurality of air pockets of the cushion part, thereby simplifying manufacturing processes.Type: ApplicationFiled: September 14, 2007Publication date: September 30, 2010Applicant: CERAGEM CO., LTD.Inventors: Dong-Guy Im, Gin-Kyu Choi
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Patent number: 7590166Abstract: An apparatus and a method for improving the performance of an error correction code in response to the influence of error propagation are disclosed.Type: GrantFiled: December 2, 2004Date of Patent: September 15, 2009Assignee: Samsung Electronics Co. Ltd.Inventors: Hyun-Seok Oh, Hyun-Seok Yu, Hye-Jeong Lee, Gin-Kyu Choi, Yong-Suk Moon, Jung-Hoon Joo, Su-Jin Yoon
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Patent number: 7574178Abstract: An apparatus and method for improving the performance of an error correction code against the effects of error waves in a Multi-Input Multi-Output (MIMO) communication system are provided. In a receiver of the MIMO communication system, a Minimum Mean Square Error (MMSE) receiver unit estimates transmitted signals from at least two paths using signals received at each of receive antennas, a signal deprocessor selects one of the estimated signals, stores the other estimated signal, assigns weighting values to the selected signal and a previous detected signal, combines the weighted signals, and detects transmitted data from the combined signal, a signal reproducer reproduces a transmitted signal from the detected transmitted data, and a subtractor updates the received signals by subtracting the reproduced transmitted signal from the received signals and provides them to the MMSE receiver unit.Type: GrantFiled: December 1, 2004Date of Patent: August 11, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Hyun-Seok Oh, Hye-Jeong Lee, Hyun-Seok Yu, Gin-Kyu Choi, Yong-Suk Moon, Jeong-Won Lee, Hyun-Bae Lee
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Patent number: 7567625Abstract: An apparatus and a method capable of effectively allocating sub-carriers for a plurality of users and transmitting the sub-carriers to users through multiple antennas in an orthogonal frequency division multiplexing (OFDMA) mobile communication system are provided. A sub-carrier allocation method reduces transmission power by taking a desired bit rate and power budget into consideration. The sub-carriers are optimally allocated to each antenna, so that peak to average power ratio (PARR) is reduced and Quality of Service (QoS) is improved. The apparatus and the method are adaptable for multi-users and obtain space diversity gain through multiple antennas.Type: GrantFiled: November 10, 2004Date of Patent: July 28, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Hyun-Seok Oh, Hyun-Seok Yu, Hye-Jeong Lee, Gin-Kyu Choi, Yong-Suk Moon
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Apparatus and method for assigning sub-carriers in an orthogonal frequency division multiplex system
Patent number: 7545732Abstract: An apparatus and method for assigning sub-carriers in an orthogonal frequency division multiplex (OFDM) system are disclosed. In the apparatus and method, data is transmitted through at least one transmit antenna. At least two sub-carriers in a predetermined frequency band are assigned to a user equipment (UE), for data transmission. A Node B groups sub-carriers available to the OFDM system into sub-carrier groups, each having at least two sub-carriers, transmits data to the UE on sub-carriers in the sub-carrier groups, selects at least one sub-carrier group for the UE based on channel condition information about each of the sub-carrier groups received from the UE, and assigns the selected sub-carrier group to the UE.Type: GrantFiled: August 19, 2004Date of Patent: June 9, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Hyun-Seok Oh, Sung-Jin Kim, Yong-Suk Moon, Young-Seok Lim, Hyun-Seok Yu, Gin-Kyu Choi, Hye-Jeong Lee -
Patent number: 7453948Abstract: An apparatus and method for transmitting/receiving data using a multiple antenna scheme in a mobile communication system are provided. First and second code symbol sequences are generated by encoding a data symbol sequence for transmission in a predetermined encoding method. Transmission of the two code symbol sequences through the first and second transmit antennas is controlled such that if the data symbol sequence is initially transmitted, the first code symbol sequence is transmitted through the first transmit antenna and the second code symbol sequence is transmitted through the second transmit antenna and, if the data symbol sequence is retransmitted, the first code symbol sequence is transmitted through the second transmit antenna and the second code symbol sequence is transmitted through the first transmit antenna.Type: GrantFiled: May 28, 2004Date of Patent: November 18, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Noh-Sun Kim, Hun-Kee Kim, Gin-Kyu Choi
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Publication number: 20080196167Abstract: The present invention relates to a method for manufacturing an air mat that reduces the number of manufacturing processes by means of rotational molding, while preventing the generation of defective products, to a device for molding an air mat, and to an air mat manufactured and molded by the method and device. In a method for manufacturing an air mat formed in such a manner as to integrally couple a cushion part having a plurality of air bags arranged therein for containing air at the insides thereof with a plate-shaped lower sheet disposed on the lower surface of the cushion part, the method includes the steps of: preparing a lower mold having a plurality of air bag molding recesses having given depths arranged at given intervals thereon, for molding the cushion part of the air mat.Type: ApplicationFiled: March 3, 2005Publication date: August 21, 2008Inventors: Dong-gyu Im, Gin-kyu Choi
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Patent number: 7400607Abstract: A bit scrambling method and apparatus for packet transmission/reception in a wireless communication system are provided. A transmitter performs bit scrambling before CRC attachment and a receiver performs bit descrambling after a CRC check. This enables termination of iterative decoding at a turbo decoder according to the CRC check. Hence, power consumption is reduced and throughput is increased at a receiver.Type: GrantFiled: November 12, 2004Date of Patent: July 15, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Noh-Sun Kim, Hun-Kee Kim, Gin-Kyu Choi, Hea-Kyoung Jung
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Patent number: 7391727Abstract: A de-rate matching method and apparatus in a High Speed Downlink Packet Access (HSDPA) system are provided.Type: GrantFiled: February 28, 2005Date of Patent: June 24, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Su-Jin Yoon, Hoon-Geun Song, Dong-Wook Park, Gin-Kyu Choi, Yong-Suk Moon
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Patent number: 7392012Abstract: An apparatus and method for receiving a signal in a MIMO communication system are provided. In the signal receiving method, a first received signal received at each of the receive antennas is equalized in a predetermined first method. Each of the equalized transmit antenna signals is despread with a plurality of spreading codes used in a transmitter. The strongest transmit antenna signal is detected among the despread transmit antenna signals, and decoded in a predetermined second method, for error verification. The verified strongest transmit antenna signal is reproduced as an interference signal. A second received signal is generated by subtracting the interference signal from the first received signal and equalized in the first method. The above operation is repeated on the equalized transmit antenna signals except the strongest transmit antenna signal.Type: GrantFiled: February 2, 2005Date of Patent: June 24, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Hyun-Seok Oh, Hyun-Seok Yu, Hye-Jeong Lee, Gin-Kyu Choi, Yong-Suk Moon, Hyun-Bae Lee, Young-Seok Lim
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Patent number: 7382837Abstract: An apparatus and method for estimating a decision boundary in symbol units in a mobile communication system. The method for estimating a decision boundary of reception symbols in a receiver of a mobile communication system includes the step of calculating a preliminary decision boundary for every symbol entered a decision boundary estimator; and reflecting the preliminary decision boundary calculated for every symbol in a previous symbol's decision boundary having been calculated in consideration of a channel environment until reaching the previous symbol, and calculating a new decision boundary for the entered symbol.Type: GrantFiled: May 20, 2004Date of Patent: June 3, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-Hoon Han, Jung-Wook Yoon, Yong-Suk Moon, Gin-Kyu Choi
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Patent number: 7362733Abstract: A transmitting/receiving apparatus and method for packet retransmission in a mobile communication system. Upon request for a retransmission from a receiver, a transmitter generates first coded bits by inverting initially transmitted coded bits, generates second coded bits by separating the initially transmitted coded bits into a first bit group having a relatively high priority and a second bit group having a relatively low priority and exchanging the first bit group with the second bit group, and generates third coded bits by inverting the exchanged coded bits. The transmitter selects one of the first coded bits, the second coded bits according to the sequence number of a retransmission request received from the receiver, and the third coded bits and maps the selected coded bits to modulation symbols. The transmitter then transmits the modulation symbols to the receiver.Type: GrantFiled: October 28, 2002Date of Patent: April 22, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Noh-Sun Kim, Gin-Kyu Choi, Yong-Suk Moon, Hun-Kee Kim, Jae-Seung Yoon
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Patent number: 7346035Abstract: A method and system of retransmitting uplink packet data from a user equipment (UE) in a handover region to Node Bs. The UE transmits packet data to the Node Bs on an enhanced uplink dedicated transport channel (EUDCH). The Node Bs transmit to the UE first response fields indicating whether the Node Bs have received good packet data or bad packet data, and second response fields that the Node Bs received from an RNC indicating whether a radio network controller (RNC) has received good packet data or bad packet data. The UE then detects the first and second response fields and retransmits the uplink packet data according to the values of the response fields in the UE.Type: GrantFiled: October 17, 2003Date of Patent: March 18, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-Sung Lee, Gin-Kyu Choi, Hun-Kee Kim, Kyo-Sook Shin, Noh-Sun Kim
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Patent number: 7283509Abstract: An apparatus for retransmitting data at a retransmission request from a receiver by a transmitter in a CDMA mobile communication system including a turbo encoder with a given coding rate and initially transmitting systematic bits and parity bits obtained by encoding the data by the turbo encoder using one modulation mode among a plurality of modulation modes. A controller determines a modulation mode to be used between the transmitter and the receiver in response to the retransmission request. A distributor distributes coded bits obtained by encoding the data at the coding rate into systematic bits and parity bits. A selector selects coded bits transmittable by the determined modulation mode among the systematic bits and the parity bits at the initial transmission, if the determined modulation mode is different from the modulation mode used at initial transmission. A modulator modulates the transmittable coded bits into modulated symbols according to the determined modulation mode.Type: GrantFiled: July 25, 2002Date of Patent: October 16, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-Suk Moon, Gin-Kyu Choi, Hun-Kee Kim, Jae-Seung Yoon
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Patent number: 7200792Abstract: In an apparatus for data transmission in a communication system, a turbo encoder encodes data bits to generate systematic bits and parity bits, and a rate matcher matches the systematic bits and parity bits. A first interleaver writes the rate-matched systematic bits on a row by row basis, and performs inter-column permutation. A second interleaver writes the rate-matched parity bits on a row-by-row basis, and performs inter-column permutation. A modulator alternatively collects the permutated bits on a column by column basis from the first and second interleavers, and maps collected bits from the first and second interleavers onto one modulation symbol, wherein a size of the first interleaver is equal to a size of the second interleaver.Type: GrantFiled: December 20, 2002Date of Patent: April 3, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Hun-Kee Kim, Gin-Kyu Choi, Jae-Seung Yoon, Noh-Sun Kim, Jun-Sung Lee, Yong-Suk Moon