Patents by Inventor Nam-il Kim
Nam-il Kim 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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Publication number: 20120093255Abstract: Provided is a data transmission device and a symbol generation method of the same. A data processing unit of a data transmission device according to an embodiment of the present invention accesses a memory device for reading another data block while symbols for one data block are generated.Type: ApplicationFiled: September 2, 2011Publication date: April 19, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Chan Bok JEONG, Nam Il KIM, Daeho KIM
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Patent number: 8143970Abstract: Disclosed is a variable phase shifter, the variable phase shifter including: a fixed board which is fixedly provided in a housing, and consisting of a dielectric board, and consisting of a dielectric board, having a second transfer stripline having at least one arc-shaped output micro stripline on one surface; a rotating board rotatably provided within the housing while coming in contact with the one surface of the fixed board, and consisting of a dielectric board, having a second transfer stripline coupled to the arc-shaped output micro stripline on a surface where the rotating board comes in contact with the one surface of the fixed board even when the rotating board rotates; wherein both the sides of at least one output micro stripline of the fixed board are connected to an output port, and the other surface of the fixed board includes an input micro stripline, so that the other surface of the fixed board is electrically connected and receives an input signal.Type: GrantFiled: June 20, 2007Date of Patent: March 27, 2012Assignee: KMW Inc.Inventors: Young-Chan Moon, Ryoji Matsubara, Nam-Il Kim
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Patent number: 8125976Abstract: The invention provides a method of generating a downlink signal and searching a cell on the basis of the downlink signal in an OFDM-based cellular system. The downlink signal includes a plurality of synchronization blocks each having a plurality of sub-frames, and a synchronization pattern composed of a combination of a cell group identification code for identifying a cell group and a frame synchronization identification code for indicating a frame start point is generated in each of the synchronization blocks. Different frame synchronization identification codes are allocated to the synchronization blocks.Type: GrantFiled: May 25, 2007Date of Patent: February 28, 2012Assignees: Electronics and Telecommunications Research Institute, SK Telecom., Co., Ltd., KT CorporationInventors: Kap-Seok Chang, Il-Gyu Kim, Nam-Il Kim, Young-Hoon Kim, Seung-Chan Bang
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Patent number: 8102927Abstract: The present invention provides an OFDM symbol generating apparatus. The OFDM symbol generating apparatus generates a plurality of weight-applied symbol groups by applying a plurality of weights to a digital modulation symbol group, and generates a plurality of IFFT symbol groups by performing an IFFT operation on the plurality of weight-applied symbol groups. Subsequently, an IFFT symbol group having the minimum PAPR is selected from among the plurality of IFFT symbol groups such that a characteristic of a PAPR can be improved without reducing data transmission speed.Type: GrantFiled: January 12, 2007Date of Patent: January 24, 2012Assignees: SK Telecom. Co., Ltd., KT Corporation, Electronics & Telecommunications Research InstituteInventors: Nam-Il Kim, Il-Gyu Kim, Hye-Kyung Jwa, Young-Hoon Kim, Seung-Chan Bang
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Patent number: 8027397Abstract: The present invention relates to an orthogonal frequency division multiplexing (OFDM) signal transmitting and receiving device, in which a peak to average power ratio characteristic is improved without reducing a data transmission speed. The OFDM signal transmitting device separates a digital modulated symbol as a real part and an imaginary part, and performs discrete cosine transform (DCT) and discrete sine transform (DST) operations respectively for real and imaginary part symbols, performs an inverse fast Fourier transform operation, and generates an OFDM symbol. The OFDM signal receiving device performs a fast Fourier transform operation for the OFDM symbol, and performs an inverse DCT operation and an inverse DST operation, performs a digital demodulating operation, and generates a final binary data symbol.Type: GrantFiled: October 10, 2006Date of Patent: September 27, 2011Assignees: Electronics and Telecommunications Research Institute, SK Telecom., Co., Ltd., KT CorporationInventors: Nam-Il Kim, Young-Hoon Kim, Seung-Chan Bang
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Publication number: 20110217520Abstract: An abrasive sheet having improved properties which enable precise polishing and finishing is prepared by (1) coating an abrasive material-containing slurry on a concave face of an embossed first substrate and then UV-curing or pre-drying with heat the coating layer to form an abrasive material coating layer on the embossed first substrate; (2) coating an adhesive on one side of a second substrate to form an adhesive layer thereon; (3) combining the first and second substrates such that the abrasive material coating layer is bonded to the adhesive layer to form a laminate; and (4) separating the first substrate from the laminate formed in step (3), to obtain an abrasive sheet having an embossed abrasive material coating layer.Type: ApplicationFiled: August 19, 2009Publication date: September 8, 2011Applicant: SUN ABRASIVES CORPORATIONInventor: Nam Il Kim
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Publication number: 20110145669Abstract: A data derate matcher for supporting hybrid automatic repeat request (HARQ), includes a control parameter generation unit for generating control parameters to separate bits of an input bit stream ek; and a bit separation unit for separating the bits of the input bit stream ek into three types of bits streams v(0)k, v(1)k, and v(2)k by modulus operation of each of the bits of the input bit stream and the control parameters. Further, the data derate matcher for supporting the HARQ includes address generators for generating addresses (j) of valid data to be used in deinterleavers with respect to data of each of the bit streams output from the bit separation unit; and subblock deinterleavers for sequentially inputting data corresponding to the addresses generated by the address generators to output decoded data.Type: ApplicationFiled: July 22, 2010Publication date: June 16, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Nam Il KIM, Daeho KIM
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Publication number: 20110122267Abstract: A shake correction module, a camera module including the same, and a method of manufacturing the camera module are provided. The shake correction module includes: a hinge member which supports rotation movement of an optical module based on each of at least two axes at least by using an elastic characteristic of the hinge member, wherein the optical module comprises an image sensor; a base member to which the hinge member is installed; and a driving motor which rotates the hinge member based on the each of the at least two axes with respect to the base member, in order to manufacture a structure for supporting two-axes rotation of the optical module to be simple and reliable with a low manufacturing cost.Type: ApplicationFiled: October 19, 2010Publication date: May 26, 2011Applicants: SAMSUNG TECHWIN CO., LTD., MUTAS INC.Inventors: Jae-wook AHN, Nam-il KIM, Jae-hwan JEONG, Tae-ho KIM, Kyung-sik SHIN
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Publication number: 20110044256Abstract: An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group.Type: ApplicationFiled: May 30, 2007Publication date: February 24, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Kap-Seok Chang, Il-Gyu Kim, Nam-Il Kim, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang
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Publication number: 20100191932Abstract: Provided are an address generation apparatus and method of an interleaver/deinterleaver. By calculating coefficients of an address generator polynomial of an interleaver by determining exponents according to the number of prime factors forming a length of input data of the interleaver and generating an address of the deinterleaver using the calculated coefficients, errors generated when the address of the deinterleaver is generated can be removed, and right interleaver and deinterleaver addresses can be calculated.Type: ApplicationFiled: March 21, 2008Publication date: July 29, 2010Applicants: Eletronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.Inventors: Nam-Il Kim, Young-Jo Ko, Young-Hoon Kim
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Publication number: 20100162077Abstract: A Maximum A Posteriori (MAP) decoder and a MAP decoding method are provided. The MAP decoder includes a first metric operation unit, a first bit-width control unit, a second metric operation unit, a Log Likelihood Ratio (LLR) operation unit, and a second bit-width control unit. The first metric operation unit outputs a first metric data using an input data. The first bit-width control unit controls a bit-width of the first metric data according to a modulation scheme of the input data. The second metric operation unit outputs a second metric data using the first metric data having the controlled bit-width. The LLR operation unit outputs LLR data using the second metric data. The second bit-width control unit outputs decoding data by re-controlling the bit-width of the LLR data.Type: ApplicationFiled: August 20, 2009Publication date: June 24, 2010Applicant: Electronics and Telecommunications Research InstituteInventors: Nam Il Kim, Dae Ho Kim
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Publication number: 20100157918Abstract: Provided are a method and apparatus for allocating DeModulation Reference Signals (DMRSs). The method includes generating DMRSs, and allocating the DMRSs at consecutive subcarrier positions with respect to all the transmit (TX) antennas of each User Equipment (UE) and allocating the DMRSs at different subcarrier positions with respect to each TX antenna of the UE.Type: ApplicationFiled: September 2, 2009Publication date: June 24, 2010Applicant: Electronics and Telecommunications Research InstituteInventors: Nam Il KIM, Dae Ho KIM
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Publication number: 20100104001Abstract: Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.Type: ApplicationFiled: October 10, 2007Publication date: April 29, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., Electronics and Telecommunications Research InstituteInventors: Moon-Sik Lee, Nam-Il Kim, Hyeong-Geun Park, Il-Gyu Kim, Young-Hoon Kim, Seung-Chan Bang
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Patent number: 7652978Abstract: The present invention relates to a transmitter in an OFDM system for improving the PAPR, and a method thereof. According to the exemplary embodiment of the present invention, channel encoding is performed in order to correct a data transmission error of a radio channel, a predetermined bit of the channel encoded data is bit-inverted by using a mask bit or a mask bit sequence, and a PAPR of the signal is reduced. Accordingly, reduction of transmission efficiency which has been generated in block coding and DSI methods is not generated when the signal is transmitted because an additional bit is not required.Type: GrantFiled: July 28, 2005Date of Patent: January 26, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Nam-Il Kim, In-Hwa Jung, Young-Hoon Kim, Sang-Woo Nam
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Publication number: 20090262344Abstract: The present invention relates to equipment for measuring water quality using a fish or a water flea, an more particularly, to equipment for measuring water quality in which small organisms such as killifish (or medaka) or water flea are put into test chamber having a plurality of divided sections and behavior of the fishes or the water fleas accommodated in the test chamber is observed while continuously flowing water of a river or a water zone to be examined through the test chamber, thereby finding out and measuring existence of toxic element or harmful substance included in the water to be examined.Type: ApplicationFiled: July 4, 2008Publication date: October 22, 2009Inventors: Sung Jin Yoon, nam-il Kim, Han-Oh Park
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Publication number: 20090252109Abstract: The present invention relates to a method for demodulating a BCH by using an SCH in an OFDM system with transmit diversity, and a transmitting apparatus and a receiving apparatus using the same. For this purpose, the present invention provides a transmit diversity transmission method for a transmitting apparatus of a base station that generates an SCH symbol and a BCH symbol, maps the SCH symbol and the BCH symbol to an OFDM signal, converts the OFDM signal into a time domain signal, and transmits the OFDM signal trough a selected antenna among a plurality of antennas. In addition, the present invention provides a method for demodulating a BCH by using an SCH to a mobile station that receives an OFDM signal from the base station, filters an SCH and a BCH from the OFDM signal, converts the OFDM signal to a frequency domain signal, calculates a channel estimation value by using the SCH and the BCH, and coherently demodulates the BCH.Type: ApplicationFiled: December 22, 2006Publication date: October 8, 2009Applicant: Electronics and Telecommunications Research InstituteInventors: Il-Gyu Kim, Hyeong-Geun Park, Nam-Il Kim, Kap-Seok Chang, Moon-Sik Lee, Young-Hoon Kim, Seung-Chan Bang
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Publication number: 20090240024Abstract: A biaxially oriented polyester film of the present invention which comprises a polyester resin prepared by polymerizing a glycol component mainly comprising 1,3-propanediol and an acid component mainly comprising terephthalic acid or dimethyl terephthalate, said polyester film having an unit impact absorption energy of 1.0 or more, can be advantageously used for packaging.Type: ApplicationFiled: March 22, 2005Publication date: September 24, 2009Applicant: SKC CO., LTD.Inventors: Nam-Il Kim, Sang-ll Kim, Kyung-Yon Kim, Taebyoung Oh, Youngwon Kim
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Publication number: 20090219882Abstract: Provided are a cell search method, a forward link frame transmission method, an apparatus using the methods, and a forward link frame structure. The cell search apparatus includes a sync acquirer acquiring synchronization of sync channel symbols using a sync channel of a forward link, and a group detector detecting at least one hopping codeword element belonging to a hopping codeword of a target cell from a forward link signal containing sync channel symbols sequence-hopped using a hopping codeword corresponding to a code group to which a scrambling code of each cell belongs based on the acquired synchronization, and detecting a code group of the target cell based on the detected hopping codeword element, wherein the hopping codewords are orthogonal to a cyclic shift operation. Accordingly, a cell search time and the complexity of the cell search can be reduced.Type: ApplicationFiled: November 10, 2006Publication date: September 3, 2009Applicant: Electronics and Telecommunications Research InstituteInventors: Il-Gyu Kim, Hyeong-Geun Park, Nam-Il Kim, Kap-Seok Chang, Young-Hoon Kim, Seung-Chan Bang
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Publication number: 20090195329Abstract: Disclosed is a variable phase shifter The variable phase shifter includes a housing; a fixed board unit fixedly installed inside the housing, equipped with an input microstrip line with a via hole for receiving an input signal on one face thereof, and equipped with at least one circular arc-shaped output microstrip line outside the input microstrip line; and a rotating board unit rotatably installed inside the housing while being in contact with the one face of the fixed board unit, equipped with a transmission microstrip line on a face coming in contact with the one face of the fixed board unit, and for providing at least one output signal by making coupling even during rotation thereof.Type: ApplicationFiled: June 19, 2007Publication date: August 6, 2009Applicant: KMW INC.Inventors: Duk-Yong Kim, Young-Chan Moon, Ryoji Matsubara, Eui-Song Choi, Nam-Il Kim
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Publication number: 20090184780Abstract: Disclosed is a variable phase shifter, the variable phase shifter including: a fixed board which is fixedly provided in a housing, and consisting of a dielectric board, and consisting of a dielectric board, having a second transfer stripline having at least one arc-shaped output micro stripline on one surface; a rotating board rotatably provided within the housing while coming in contact with the one surface of the fixed board, and consisting of a dielectric board, having a second transfer stripline coupled to the arc-shaped output micro stripline on a surface where the rotating board comes in contact with the one surface of the fixed board even when the rotating board rotates; wherein both the sides of at least one output micro stripline of the fixed board are connected to an output port, and the other surface of the fixed board includes an input micro stripline, so that the other surface of the fixed board is electrically connected and receives an input signal.Type: ApplicationFiled: June 20, 2007Publication date: July 23, 2009Applicant: KMW INC.Inventors: Young-Chan Moon, Ryoji Matsubara, Nam-Il Kim