Patents by Inventor Myung-Don Kim
Myung-Don 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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Patent number: 11569856Abstract: An operation method of a receiving device may comprise: receiving a periodic band-limited signal from a transmitting device; determining whether a carrier frequency of the periodic band-limited signal satisfies a constraint; converting the periodic band-limited signal into a digital high-frequency band signal by sampling the periodic band-limited signal at an extraction rate equal to or less than a Nyquist extraction rate when the carrier frequency satisfies the constraint; down-converting the digital high-frequency band signal into a digital baseband signal; rearranging samples of a plurality of periods of the digital baseband signal into one period; and generating a reconstructed signal by performing low-pass filtering with a bandwidth of the periodic band-limited signal on the digital baseband signal in which the samples are rearranged.Type: GrantFiled: December 6, 2021Date of Patent: January 31, 2023Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Kyungwon Kim, Heon KooK Kwon, Myung-Don Kim
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Publication number: 20220182091Abstract: An operation method of a receiving device may comprise: receiving a periodic band-limited signal from a transmitting device; determining whether a carrier frequency of the periodic band-limited signal satisfies a constraint; converting the periodic band-limited signal into a digital high-frequency band signal by sampling the periodic band-limited signal at an extraction rate equal to or less than a Nyquist extraction rate when the carrier frequency satisfies the constraint; down-converting the digital high-frequency band signal into a digital baseband signal; rearranging samples of a plurality of periods of the digital baseband signal into one period; and generating a reconstructed signal by performing low-pass filtering with a bandwidth of the periodic band-limited signal on the digital baseband signal in which the samples are rearranged.Type: ApplicationFiled: December 6, 2021Publication date: June 9, 2022Applicant: Electronics and Telecommunications Research InstituteInventors: Kyungwon KIM, Heon KooK KWON, Myung-Don KIM
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Patent number: 10804862Abstract: High frequency signal amplifier including balun is disclosed. The amplifier comprises an input terminal (Vin) through which the high frequency signal is input; a balun which is connected to the input terminal and outputs a first differential signal and a second differential signal based on the high frequency signal; a transistor (M) which is connected to the balun and outputs an amplified high frequency signal based on the first differential signal and the second differential signal; an output terminal which is connected to the transistor (M) and through which the amplified high frequency signal is acquired and the amplified high frequency signal is output. Therefore, performance of the amplifier can be enhanced.Type: GrantFiled: November 27, 2018Date of Patent: October 13, 2020Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sun Woo Kong, Myung Don Kim, Cheol Ho Kim, Hui Dong Lee
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Patent number: 10547478Abstract: Disclosed are a method for signal modulation based on pulse density modulation and an apparatus therefore. The method for signal modulation is performed in an apparatus for modulating a signal based on pulse density modulation and includes performing pulse density modulation on an analog signal input to the apparatus through a pulse density modulator of the apparatus, converting a bandwidth of the pulse density modulated signal into a bandwidth required for the apparatus through a correlative encoder of the apparatus, transmitting the bandwidth converted signal to a radio frequency (RF) unit of the apparatus based on an electrical-to-optical (E/O) converter and an optical-to-electrical (O/E) converter of the apparatus, filtering a frequency band of the bandwidth converted signal and outputting the frequency band filtered signal via the RF unit.Type: GrantFiled: December 20, 2018Date of Patent: January 28, 2020Assignee: Electronics and Telecommunications Research InstituteInventors: Seung Hyun Jang, Sun Woo Kong, Kwang Seon Kim, Myung Don Kim, Hui Dong Lee
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Patent number: 10505448Abstract: A buck-boost converter using a delta-sigma modulator (DSM) includes a buck-boost mode driving circuit configured to receive an input voltage and output an output voltage according to an operation mode, a mode controller configured to sense an output of the buck-boost mode driving circuit and determine the operation mode, and a gate driver configured to receive a mode determination signal for determining the operation mode from the mode controller and control switches included in the buck-boost mode driving circuit. Accordingly, output ripple characteristics thereof can be improved.Type: GrantFiled: November 21, 2018Date of Patent: December 10, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young Kyun Cho, Myung Don Kim, Seok Bong Hyun
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Patent number: 10491105Abstract: A power converter and a dead-time controller for a power converter. The power converter includes a first power switching element through which an input voltage is applied, a second power switching element connected to the first power switching element through a switching node, an output circuit coupled to the switching node, a control switching element configured to control the first power switching element and the second power switching element through a first control node connected to the first power switching element and a second control node connected to the second power switching element, and a control assist unit configured to control the control switching element on the basis of voltages of the switching node and the first control node or voltages of the switching node and the second control node.Type: GrantFiled: July 27, 2018Date of Patent: November 26, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young Kyun Cho, Myung Don Kim, Seok Bong Hyun
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Publication number: 20190348909Abstract: A power converter and a dead-time controller for a power converter. The power converter includes a first power switching element through which an input voltage is applied, a second power switching element connected to the first power switching element through a switching node, an output circuit coupled to the switching node, a control switching element configured to control the first power switching element and the second power switching element through a first control node connected to the first power switching element and a second control node connected to the second power switching element, and a control assist unit configured to control the control switching element on the basis of voltages of the switching node and the first control node or voltages of the switching node and the second control node.Type: ApplicationFiled: July 27, 2018Publication date: November 14, 2019Inventors: Young Kyun CHO, Myung Don KIM, Seok Bong HYUN
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Publication number: 20190326814Abstract: A buck-boost converter using a delta-sigma modulator (DSM) includes a buck-boost mode driving circuit configured to receive an input voltage and output an output voltage according to an operation mode, a mode controller configured to sense an output of the buck-boost mode driving circuit and determine the operation mode, and a gate driver configured to receive a mode determination signal for determining the operation mode from the mode controller and control switches included in the buck-boost mode driving circuit. Accordingly, output ripple characteristics thereof can be improved.Type: ApplicationFiled: November 21, 2018Publication date: October 24, 2019Inventors: Young Kyun CHO, Myung Don KIM, Seok Bong HYUN
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Switch mode power supply using a reconfigurable delta-sigma modulator and method of driving the same
Patent number: 10418898Abstract: The present disclosure a switched-mode power supply using a reconfigurable delta-signal modulator (DSM). The switched-mode power supply comprises, a current sensing unit configured to determine an operation mode on the basis of a result of sensing a current of an output terminal; a compensator configured to output a compensation signal by amplifying a difference value between an output voltage and a reference voltage; a reconfigurable DSM configured to output a digital signal by noise-shaping the compensation signal; a power switch unit switched by the digital signal to output an output voltage; and an attenuator configured to supply a feedback voltage of the output voltage attenuated by a voltage divider to the compensator.Type: GrantFiled: July 10, 2018Date of Patent: September 17, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young Kyun Cho, Myung Don Kim, Seok Bong Hyun, Bong Hyuk Park, Cheol Ho Kim -
Publication number: 20190207790Abstract: Disclosed are a method for signal modulation based on pulse density modulation and an apparatus therefore. The method for signal modulation is performed in an apparatus for modulating a signal based on pulse density modulation and includes performing pulse density modulation on an analog signal input to the apparatus through a pulse density modulator of the apparatus, converting a bandwidth of the pulse density modulated signal into a bandwidth required for the apparatus through a correlative encoder of the apparatus, transmitting the bandwidth converted signal to a radio frequency (RF) unit of the apparatus based on an electrical-to-optical (E/O) converter and an optical-to-electrical (O/E) converter of the apparatus, filtering a frequency band of the bandwidth converted signal and outputting the frequency band filtered signal via the RF unit.Type: ApplicationFiled: December 20, 2018Publication date: July 4, 2019Applicant: Electronics and Telecommunications Research InstituteInventors: Seung Hyun JANG, Sun Woo KONG, Kwang Seon KIM, Myung Don KIM, Hui Dong LEE
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Publication number: 20190207567Abstract: High frequency signal amplifier including balun is disclosed. The amplifier comprises an input terminal (Vin) through which the high frequency signal is input; a balun which is connected to the input terminal and outputs a first differential signal and a second differential signal based on the high frequency signal; a transistor (M) which is connected to the balun and outputs an amplified high frequency signal based on the first differential signal and the second differential signal; an output terminal which is connected to the transistor (M) and through which the amplified high frequency signal is acquired and the amplified high frequency signal is output. Therefore, performance of the amplifier can be enhanced.Type: ApplicationFiled: November 27, 2018Publication date: July 4, 2019Inventors: Sun Woo KONG, Myung Don KIM, Cheol Ho KIM, Hui Dong LEE
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Patent number: 10320466Abstract: Disclosed are an apparatus and a method for estimating a parameter of a multi path signal. The apparatus for estimating a parameter of a multi path signal includes: a plurality of pre-processing units configured to pre-process respective reception signals received through a plurality of antennas; a plurality of parameter converting units configured to approximate a parameter set of the respective pre-processed reception signals to have a sparse characteristic in a Doppler frequency and angle of arrival domain; and a parameter estimating unit configured to estimate an angle of arrival for a plurality of reception signals in each frequency region of the Doppler frequency and angle of arrival domain.Type: GrantFiled: August 23, 2016Date of Patent: June 11, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Juyul Lee, Myung Don Kim, Jinup Kim, Hyun Kyu Chung, Minuk Kim, Jubum Kim, Eun Ae Lee, Joon Ho Cho
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Patent number: 10193220Abstract: Disclosed is an antenna array, including: a first antenna; a second antenna; and a dielectric substance, of which a height is determined based on a distance between the first and second antennas and forms of beam patterns of the first and second antennas. According to the antenna array according to the exemplary embodiments of the present invention, it is possible to decrease coupling between the antennas.Type: GrantFiled: March 9, 2016Date of Patent: January 29, 2019Assignee: Electronics and Telecommunications Research InstituteInventors: Juyul Lee, Jinup Kim, Myung-Don Kim
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SWITCH MODE POWER SUPPLY USING A RECONFIGURABLE DELTA-SIGMA MODULATOR AND METHOD OF DRIVING THE SAME
Publication number: 20190028027Abstract: The present disclosure a switched-mode power supply using a reconfigurable delta-signal modulator (DSM). The switched-mode power supply comprises, a current sensing unit configured to determine an operation mode on the basis of a result of sensing a current of an output terminal; a compensator configured to output a compensation signal by amplifying a difference value between an output voltage and a reference voltage; a reconfigurable DSM configured to output a digital signal by noise-shaping the compensation signal; a power switch unit switched by the digital signal to output an output voltage; and an attenuator configured to supply a feedback voltage of the output voltage attenuated by a voltage divider to the compensator.Type: ApplicationFiled: July 10, 2018Publication date: January 24, 2019Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Young Kyun CHO, Myung Don KIM, Seok Bong HYUN, Bong Hyuk PARK, Cheol Ho KIM -
Patent number: 9998192Abstract: A method and terminal for performing beamforming. The beamforming method of a terminal includes acquiring a beamforming signal, calculating a beamforming coefficient to correspond to locations of a transmitter and a receiver, based on the beamforming signal, acquiring sensor information of the terminal, estimating a channel parameter based on the sensor information, and determining a final beamforming coefficient based on the beamforming coefficient and the channel parameter.Type: GrantFiled: February 6, 2017Date of Patent: June 12, 2018Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Juyul Lee, Myung Don Kim, Bong Hyuk Park, Jae Joon Park
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Publication number: 20170244458Abstract: A method and terminal for performing beamforming. The beamforming method of a terminal includes acquiring a beamforming signal, calculating a beamforming coefficient to correspond to locations of a transmitter and a receiver, based on the beamforming signal, acquiring sensor information of the terminal, estimating a channel parameter based on the sensor information, and determining a final beamforming coefficient based on the beamforming coefficient and the channel parameter.Type: ApplicationFiled: February 6, 2017Publication date: August 24, 2017Inventors: Juyul Lee, Myung Don Kim, Bong Hyuk Park, Jae Joon Park
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Publication number: 20170142606Abstract: Disclosed are an apparatus and a method for estimating a parameter of a multi path signal. The apparatus for estimating a parameter of a multi path signal includes: a plurality of pre-processing units configured to pre-process respective reception signals received through a plurality of antennas; a plurality of parameter converting units configured to approximate a parameter set of the respective pre-processed reception signals to have a sparse characteristic in a Doppler frequency and angle of arrival domain; and a parameter estimating unit configured to estimate an angle of arrival for a plurality of reception signals in each frequency region of the Doppler frequency and angle of arrival domain.Type: ApplicationFiled: August 23, 2016Publication date: May 18, 2017Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Juyul LEE, Myung Don KIM, Jinup KIM, Hyun Kyu CHUNG, Minuk KIM, Jubum KIM, Eun Ae LEE, Joon Ho CHO
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Publication number: 20160308283Abstract: Disclosed is an antenna array, including: a first antenna; a second antenna; and a dielectric substance, of which a height is determined based on a distance between the first and second antennas and forms of beam patterns of the first and second antennas. According to the antenna array according to the exemplary embodiments of the present invention, it is possible to decrease coupling between the antennas.Type: ApplicationFiled: March 9, 2016Publication date: October 20, 2016Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Juyul LEE, Jinup KIM, Myung-Don KIM
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Patent number: 9397870Abstract: A signal receiving device for measuring a characteristic of a wireless communication channel is provided. The signal receiving device includes an analog signal processor, an analog-digital converter, and a digital signal processor. The analog signal processor generates a band-limited signal by decreasing an intensity of a signal having an image frequency in a correlation operation result signal being a result of correlation operation, and generates an intermediate frequency signal by transforming the band-limited signal. The analog-digital converter converts the intermediate frequency signal into a digital signal.Type: GrantFiled: March 3, 2015Date of Patent: July 19, 2016Assignee: Electronics and Telecommunications Research InstituteInventors: Heon Kook Kwon, Myung Don Kim, Kwangchun Lee, Young Jun Chong
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Publication number: 20160112112Abstract: An apparatus for beamforming of a terminal acquires sensing information from an internal sensor, confirms whether the terminal is positioned in a street canyon of a road, and if it is confirmed that the terminal is positioned in the street canyon of a road, uses the sensing information to form beams of each antenna.Type: ApplicationFiled: April 8, 2015Publication date: April 21, 2016Applicant: Electronics and Telecommunications Research InstituteInventors: Juyul LEE, Myung-Don KIM, Jinup KIM