Patents by Inventor Soon-Jae Choi
Soon-Jae 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: 11978576Abstract: A method for preparing a sintered magnet is provided according to one embodiment of the present disclosure. The method includes preparing a mixed powder by coating fluorides on a surface of magnetic powder, adding heavy rare earth hydrides to the mixed powder, and heating the mixed powder, wherein the magnetic powder includes rare earth element-iron-boron-based powder, and the fluorides include at least one of an organic fluoride or an inorganic fluoride.Type: GrantFiled: October 21, 2019Date of Patent: May 7, 2024Assignee: LG Chem, Ltd.Inventors: In Gyu Kim, Soon Jae Kwon, Ik Jin Choi, Jung Goo Lee, Hyounsoo Uh
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Patent number: 8332734Abstract: A device and method for rate matching channel-encoded symbols in a data communication system. The rate matching device and method can be applied to a data communication system which uses one or both of a non-systematic code (such as a convolutional code or a linear block code) and a systematic code (such as a turbo code). In one aspect, the rate matching device includes a plurality of rate matching blocks, the number of the rate matching blocks being equal to a reciprocal of a coding rate of a channel encoder. The rate matching device can rate match the symbols encoded with a non-systematic code or the symbols encoded with a systematic code, by changing initial parameters including the number of input symbols, the number of output symbols, and the puncturing or repetition pattern determining parameters.Type: GrantFiled: May 14, 2007Date of Patent: December 11, 2012Assignee: Samsung Electronics Co., LtdInventors: Min-Goo Kim, Beong-Jo Kim, Se-Hyoung Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: 8073016Abstract: A channel coding and multiplexing apparatus and method in a CDMA communication system is disclosed. In the channel coding and multiplexing apparatus, each of a number of radio frame matchers (equal in number or greater than the number of transport channels) has a radio frame segmenter and segments each of transport channel frames that may have different transmission time intervals to radio frames. A multiplexer multiplexes the radio frames to form a serial data frame.Type: GrantFiled: April 22, 2008Date of Patent: December 6, 2011Assignee: Samsung Electronics Co., LtdInventors: Beong-Jo Kim, Se-Hyoung Kim, Min-Goo Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: 7987414Abstract: A device and method for rate matching channel-encoded bits in a data communication system. The rate matching device includes a plurality of rate matching blocks, the number of the rate matching blocks being equal to a reciprocal of a coding rate of a channel encoder. The rate matching device can rate match the bits encoded with a non-systematic code or the bits encoded with a systematic code, by changing initial parameters including the number of input bits, the number of output bits, and the puncturing or repetition pattern determining parameters.Type: GrantFiled: May 14, 2007Date of Patent: July 26, 2011Assignee: Samsung Electronics Co., LtdInventors: Min-Goo Kim, Beong-Jo Kim, Se-Hyoung Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: 7584389Abstract: This invention relates to a turbo decoding apparatus and method for a communication system. A high-rate memory buffer operating at the same frequency as a turbo decoder is arranged between a memory buffer of a receiver and the turbo decoder. The decoding apparatus reads data bits stored in the memory buffer of the receiver via the high-rate memory buffer, delays the read data bits for a time required in the turbo decoder, and then applies the delayed data bits to a Soft-In Soft-Out (SISO) decoder of the turbo decoder. The memory buffer of the receiver outputs data bits at an operating frequency or clock of the turbo decoder.Type: GrantFiled: August 6, 2003Date of Patent: September 1, 2009Assignee: Samsung Electronics Co., LtdInventors: Sung-Jin Park, Min-Goo Kim, Soon-Jae Choi
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Patent number: 7564821Abstract: A transmitting device including an encoder for receiving an information bit stream in a frame and outputting an information symbol, a first parity symbol, and a second parity symbol by encoding each information bit. An interleaver sequentially arranges the information symbols and the first and second parity symbols by rows in an array with an integer number of rows and an integer number of columns. The interleaver further outputs a plurality of radio frames in a stream, by reading the symbols by going down each column, starting at the leftmost column and proceeding right. Each radio frame has a predetermined size. A demultiplexer demultiplexes the radio frames received from the interleaver into streams of information, first parity symbols, and second parity symbols. A rate matcher bypasses the stream of information symbols and punctures the streams of the first and second parity symbols for rate matching.Type: GrantFiled: January 5, 2005Date of Patent: July 21, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Se-Hyoung Kim, Min-Goo Kim, Beong-Jo Kim, Soon-Jae Choi
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Patent number: 7508805Abstract: The present invention relates to an apparatus and method for detecting a data rate in a turbo decoder for a mobile communication system. When a rate selector selects one data rate among a plurality of data rates, a turbo decoder repeatedly decodes an input data frame within a predetermined repetition limit number using the selected data rate and outputs the decoded data. A CRC detector performs CRC check on the decoded data and outputs the CRC check result, and a decoding state measurer measures decoding quality depending on the decoded data and outputs decoding state information. A controller then sets the repetition limit number to a predetermined minimum value, controls the repetition limit number according to the decoding state information, controls the rate selector and determines a data rate of the input data depending on the CRC check result.Type: GrantFiled: October 5, 2001Date of Patent: March 24, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Soon-Jae Choi, Min-Goo Kim, Beong-Jo Kim, Young-Hwan Lee, Nam-Yul Yu, Sang-Hyuck Ha
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Publication number: 20080320373Abstract: A device and method for rate matching channel-encoded symbols in a data communication system. The rate matching device and method can be applied to a data communication system which uses one or both of a non-systematic code (such as a convolutional code or a linear block code) and a systematic code (such as a turbo code). In one aspect, the rate matching device includes a plurality of rate matching blocks, the number of the rate matching blocks being equal to a reciprocal of a coding rate of a channel encoder. The rate matching device can rate match the symbols encoded with a non-systematic code or the symbols encoded with a systematic code, by changing initial parameters including the number of input symbols, the number of output symbols, and the puncturing or repetition pattern determining parameters.Type: ApplicationFiled: May 14, 2007Publication date: December 25, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-Goo Kim, Beong-Jo Kim, Se-Hyoung Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: 7468943Abstract: Disclosed is a transmission/reception apparatus and method for providing compatibility between Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing (OFDM) in a forward link. The proposed transmission/reception apparatus and method uses a traffic channel based on OFDM while using a pilot channel and a sync channel used in the CDMA scheme. Thus, a transmitter adds a pilot channel signal and a sync channel signal to OFDM-modulated symbols before transmission, and a receiver acquires a pilot channel signal and a sync channel signal, and removes them from a received signal, thereby outputting only pure OFDM-modulated symbols.Type: GrantFiled: December 6, 2004Date of Patent: December 23, 2008Assignee: Samsung Electronics, Co., Ltd.Inventors: Young-Mo Gu, Min-Goo Kim, Soon-Jae Choi
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Patent number: 7451383Abstract: A device and method for rate matching channel-encoded symbols in a data communication system. The rate matching device and method can be applied to a data communication system which uses one or both of a non-systematic code (such as a convolutional code or a linear block code) and a systematic code (such as a turbo code). In one aspect, the rate matching device includes a plurality of rate matching blocks, the number of the rate matching blocks being equal to a reciprocal of a coding rate of a channel encoder. The rate matching device can rate match the symbols encoded with a non-systematic code or the symbols encoded with a systematic code, by changing initial parameters including the number of input symbols, the number of output symbols, and the puncturing or repetition pattern determining parameters.Type: GrantFiled: June 14, 2004Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., LtdInventors: Min-Goo Kim, Beong-Jo Kim, Se-Hyoung Kim, Soon-Jae Choi, Young-Hwan Lee
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Publication number: 20080198792Abstract: A channel coding and multiplexing apparatus and method in a CDMA communication system is disclosed. In the channel coding and multiplexing apparatus, each of a number of radio frame matchers (equal in number or greater than the number of transport channels) has a radio frame segmenter and segments each of transport channel frames that may have different transmission time intervals to radio frames. A multiplexer multiplexes the radio frames to form a serial data frame.Type: ApplicationFiled: April 22, 2008Publication date: August 21, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Beong-Jo KIM, Se-Hyoung KIM, Min-Goo KIM, Soon-Jae Choi, Young-Hwan LEE
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Publication number: 20080178064Abstract: A device and method for rate matching channel-encoded symbols in a data communication system. The rate matching device and method can be applied to a data communication system which uses one or both of a non-systematic code (such as a convolutional code or a linear block code) and a systematic code (such as a turbo code). In one aspect, the rate matching device includes a plurality of rate matching blocks, the number of the rate matching blocks being equal to a reciprocal of a coding rate of a channel encoder. The rate matching device can rate match the symbols encoded with a non-systematic code or the symbols encoded with a systematic code, by changing initial parameters including the number of input symbols, the number of output symbols, and the puncturing or repetition pattern determining parameters.Type: ApplicationFiled: May 14, 2007Publication date: July 24, 2008Inventors: Min-Goo Kim, Beong-Jo Kim, Se-Hyoung Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: 7386001Abstract: A channel coding and multiplexing apparatus and method in a CDMA communication system is disclosed. In the channel coding and multiplexing apparatus, each of a number of radio frame matchers (equal in number or greater than the number of transport channels) has a radio frame segmenter and segments each of transport channel frames that may have different transmission time intervals to radio frames. A multiplexer multiplexes the radio frames to form a serial data frame.Type: GrantFiled: June 26, 2000Date of Patent: June 10, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beong-Jo Kim, Se-Hyoung Kim, Min-Goo Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: 7373582Abstract: An apparatus and method for turbo decoding using a variable window size. A control logic block receives information about a code rate of received data bits and a data block size, adjusts a window size according to the code rate information, and computes an initial delay. Delta metric blocks compute delta metrics from input data bits of the block size, wherein the delta metrics represent a transition probability for a path from a state to another state, respectively. An alpha metric block receives a delta metric in synchronization with the initial delay, and computes an alpha metric representing a forward state transition probability in each state. One or more beta metric blocks receive delta metrics according to the adjusted window size, and compute beta metrics representing a backward state transition probability in each state, respectively.Type: GrantFiled: May 24, 2005Date of Patent: May 13, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Jin Park, Min-Goo Kim, Soon-Jae Choi
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Patent number: 7050410Abstract: A transmitting device including an encoder for receiving an information bit stream in a frame and outputting an information symbol, a first parity symbol, and a second parity symbol by encoding each information bit. An interleaver sequentially arranges the information symbols and the first and second parity symbols by rows in an array with an integer number of rows and an integer number of columns. The interleaver further outputs a plurality of radio frames in a stream, by reading the symbols by going down each column, starting at the leftmost column and proceeding right. Each radio frame has a predetermined size. A demultiplexer demultiplexes the radio frames received from the interleaver into streams of information, first parity symbols, and second parity symbols. A rate matcher bypasses the stream of information symbols and punctures the streams of the first and second parity symbols for rate matching.Type: GrantFiled: July 10, 2000Date of Patent: May 23, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Se-Hyoung Kim, Min-Goo Kim, Beong-Jo Kim, Soon-Jae Choi
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Publication number: 20050273687Abstract: An apparatus and method for turbo decoding using a variable window size. A control logic block receives information about a code rate of received data bits and a data block size, adjusts a window size according to the code rate information, and computes an initial delay. Delta metric blocks compute delta metrics from input data bits of the block size, wherein the delta metrics represent a transition probability for a path from a state to another state, respectively. An alpha metric block receives a delta metric in synchronization with the initial delay, and computes an alpha metric representing a forward state transition probability in each state. One or more beta metric blocks receive delta metrics according to the adjusted window size, and compute beta metrics representing a backward state transition probability in each state, respectively.Type: ApplicationFiled: May 24, 2005Publication date: December 8, 2005Inventors: Sung-Jin Park, Min-Goo Kim, Soon-Jae Choi
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Publication number: 20050128934Abstract: Disclosed is a transmission/reception apparatus and method for providing compatibility between Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing (OFDM) in a forward link. The proposed transmission/reception apparatus and method uses a traffic channel based on OFDM while using a pilot channel and a sync channel used in the CDMA scheme. Thus, a transmitter adds a pilot channel signal and a sync channel signal to OFDM-modulated symbols before transmission, and a receiver acquires a pilot channel signal and a sync channel signal, and removes them from a received signal, thereby outputting only pure OFDM-modulated symbols.Type: ApplicationFiled: December 6, 2004Publication date: June 16, 2005Inventors: Young-Mo Gu, Min-Goo Kim, Soon-Jae Choi
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Publication number: 20050123427Abstract: A transmitting device including an encoder for receiving an information bit stream in a frame and outputting an information symbol, a first parity symbol, and a second parity symbol by encoding each information bit. An interleaver sequentially arranges the information symbols and the first and second parity symbols by rows in an array with an integer number of rows and an integer number of columns. The interleaver further outputs a plurality of radio frames in a stream, by reading the symbols by going down each column, starting at the leftmost column and proceeding right. Each radio frame has a predetermined size. A demultiplexer demultiplexes the radio frames received from the interleaver into streams of information, first parity symbols, and second parity symbols. A rate matcher bypasses the stream of information symbols and punctures the streams of the first and second parity symbols for rate matching.Type: ApplicationFiled: January 5, 2005Publication date: June 9, 2005Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Se-Hyoung Kim, Min-Goo Kim, Beong-Jo Kim, Soon-Jae Choi
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Patent number: RE42963Abstract: A 2-dimensional interleaving method is disclosed. The method comprises dividing a frame of input information bits into a plurality of groups and sequentially storing the divided groups in a memory; permuting the information bits of the groups according to a given rule and shifting an information bit existing at the last position of the last group to a position preceding the last position; and selecting the groups according to a predetermined order, and selecting one of the information bits in the selected group.Type: GrantFiled: October 25, 2004Date of Patent: November 22, 2011Assignee: Samsung Electronics Co., LtdInventors: Min-Goo Kim, Beong-Jo Kim, Soon-Jae Choi, Young-Hwan Lee
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Patent number: RE43212Abstract: A 2-dimensional interleaving method is disclosed. The method comprises dividing a frame of input information bits into a plurality of groups and sequentially storing the divided groups in a memory; permuting the information bits of the groups according to a given rule and shifting an information bit existing at the last position of the last group to a position preceding the last position; and selecting the groups according to a predetermined order, and selecting one of the information bits in the selected group.Type: GrantFiled: October 25, 2004Date of Patent: February 21, 2012Assignee: Samsung Electronics Co., LtdInventors: Min-Goo Kim, Beong-Jo Kim, Soon-Jae Choi, Young-Hwan Lee