Patents by Inventor Joo-Hyeong Lee
Joo-Hyeong Lee 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: 10051579Abstract: Provided is a control method for a channel simulator, capable of expanding a processable dynamic range of an uplink signal receiving unit while adopting an A/D converter (ADC) having low resolution by adjusting an attenuation amount of the uplink signal receiving unit in a large-capacity channel simulator having P base stations and Q terminal interfaces.Type: GrantFiled: December 27, 2016Date of Patent: August 14, 2018Assignee: INNOWIRELESS CO., LTD.Inventors: Jin Soup Joung, Joo Hyeong Lee, Yong Hoon Lim, Kyoung Hwan Ju
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Publication number: 20180213419Abstract: Provided is a channel simulator having a function of supporting a carrier aggregation and a carrier aggregation block used for the same to support a carrier aggregation function at a minimum path loss without reducing the number of valid connectable terminals. The channel simulator includes: a terminal interface block connected to each of at least four terminals through at least two transmission/reception ports; a carrier aggregation block including unit modules each including one RF coupler and one RF switch, and interposed between the terminal interface block and the terminal to support the carrier aggregation for one to four component carriers; and a management server. The carrier aggregation block includes a front-end carrier aggregation unit and a rear-end carrier aggregation unit.Type: ApplicationFiled: June 16, 2017Publication date: July 26, 2018Inventors: Jin Soup JOUNG, Joo Hyeong LEE, Yong Hoon LIM, Kyoung Hwan JU
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Patent number: 10027428Abstract: Provided is a method of calibrating a power for a multiple input and multiple output-orthogonal frequency division multiplexing transmitter having a plurality of antennas via a measurement equipment, the method including: receiving a cyclic delay diversity (CDD) signal simultaneously output from the transmitter to obtain a starting point of a frame of a corresponding signal; performing a fast Fourier transform on a sample proceeded from the starting point by an extent of a maximum CDD delay; calculating a channel coefficient; calculating a channel impulse response and a power of the channel impulse response; converting CDD delay values of each antenna into values in units of samples by using a sampling rate in the channel impulse response; mapping a peak point position of the channel impulse response to each antenna using CDD delay sample values; and simultaneously performing a power calibration of each antenna based on each peak point power.Type: GrantFiled: February 22, 2016Date of Patent: July 17, 2018Assignee: INNOWIRELESS CO., LTD.Inventors: Jin Soup Joung, Joo Hyeong Lee, Yong Hoon Lim, Byung Kwan Jang
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Patent number: 10011790Abstract: Embodiments of processes for upgrading a petroleum-based composition while decreasing plugging comprise mixing a supercritical water stream with a pressurized, heated petroleum-based composition in a mixing device to create a combined feed stream, and introducing to a supercritical upgrading reactor system are provided. The processes also comprise cooling the upgraded product in a cooling device, and decreasing the pressure of the cooled upgraded product in a pressure reducer. To reduce plugging, the processes also comprises injecting plug remover solution into one or more of the following injection locations: an injection port on a process line connecting the mixing device with the upgrading reactor system; an injection port on a process line connecting the upgrading reactor system with the cooling device; or an injection port on a process line connecting the cooling device with the pressure reducer.Type: GrantFiled: December 9, 2016Date of Patent: July 3, 2018Assignee: Saudi Arabian Oil CompanyInventors: Ki-Hyouk Choi, Muneef F. Al-Qarzouh, Joo-Hyeong Lee, Bader M. Al-Otaibi, Abdullah T. Alabdulhadi
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Publication number: 20180171240Abstract: A method to remove a metals impurity from a petroleum feedstock for use in a power generating process is provided. The method comprising the steps of mixing a heated feedstock with a heated water stream in a mixing device to produce a mixed stream; introducing the mixed stream to a supercritical water reactor in the absence of externally provided hydrogen and externally provided oxidizing agent to produce a reactor effluent comprising a refined petroleum portion; cooling the reactor effluent to produce a cooled stream; feeding the cooled stream to a rejecter configured to separate a sludge fraction to produce a de-sludged stream; reducing the pressure of the de-sludged stream to produce a depressurized product; separating the depressurized product to produce a gas phase product and a liquid product; separating the liquid product to produce a petroleum product, having a reduced asphaltene content, reduced concentration of metals impurity, and reduced sulfur.Type: ApplicationFiled: February 13, 2018Publication date: June 21, 2018Applicant: Saudi Arabian Oil CompanyInventors: Ki-Hyouk CHOI, Emad N. SHAFEI, Ashok K. PUNETHA, Joo-Hyeong LEE, Mohammad A. ALABDULLAH
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Patent number: 9960945Abstract: Provided is a method of processing a Wideband Code Division Multiple Access (WCDMA) signal timing offset for a signal analyzer. The method includes estimating an integer multiple timing offset of WCDMA baseband sample data corresponding to an amount of at least one frame; generating a frequency domain signal which is time delayed corresponding to a fractional timing offset estimation resolution after generating the frequency domain signal by performing a Fast Fourier Transform (FFT) calculation on an already-known reference signal; converting each time-delayed frequency domain signal into a time domain signal by performing an Inverse Fast Fourier Transform (IFFT) calculation on each time-delayed frequency domain signal and calculating a correlation between an input signal from a position of the integer multiple timing offset and the time domain signal; and estimating a delay time leading to a maximum correlation as a fractional timing offset.Type: GrantFiled: February 22, 2016Date of Patent: May 1, 2018Assignee: INNOWIRELESS CO., LTD.Inventors: Jin Soup Joung, Joo Hyeong Lee, Yong Hoon Lim, Kyoung Hwan Ju
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Patent number: 9926497Abstract: A method to remove a metals impurity from a petroleum feedstock for use in a power generating process is provided. The method comprising the steps of mixing a heated feedstock with a heated water stream in a mixing device to produce a mixed stream; introducing the mixed stream to a supercritical water reactor in the absence of externally provided hydrogen and externally provided oxidizing agent to produce a reactor effluent comprising a refined petroleum portion; cooling the reactor effluent to produce a cooled stream; feeding the cooled stream to a rejecter configured to separate a sludge fraction to produce a de-sludged stream; reducing the pressure of the de-sludged stream to produce a depressurized product; separating the depressurized product to produce a gas phase product and a liquid product; separating the liquid product to produce a petroleum product, having a reduced asphaltene content, reduced concentration of metals impurity, and reduced sulfur.Type: GrantFiled: October 16, 2015Date of Patent: March 27, 2018Assignee: SAUDI ARABIAN OIL COMPANYInventors: Ki-Hyouk Choi, Emad N. Shafei, Ashok K. Punetha, Joo-Hyeong Lee, Mohammad A. Alabdullah
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Patent number: 9914885Abstract: This present invention generally relates to a process for upgrading and desulfurizing crude oil using supercritical water. In general, the invention provides a process for removal of contaminants from a crude oil stream by mixing the crude oil stream with supercritical water and then filtering out the precipitated solid compounds that result from mixing the crude oil stream with supercritical water.Type: GrantFiled: March 5, 2013Date of Patent: March 13, 2018Assignee: SAUDI ARABIAN OIL COMPANYInventors: Ki-Hyouk Choi, Joo-Hyeong Lee, Mohammad S. Garhoush
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Publication number: 20180037828Abstract: A method for upgrading a petroleum feedstock using a supercritical water petroleum upgrading system includes introducing the petroleum feedstock, water and an auxiliary feedstock. The method includes operating the system to combine the petroleum feedstock and the water to form a mixed petroleum feedstock and introducing separately and simultaneously into a lower portion of an upflowing supercritical water reactor. The auxiliary feedstock is introduced such that a portion of a fluid contained within the upflowing reactor located proximate to the bottom does not lack fluid momentum. An embodiment of the method includes operating the supercritical water petroleum upgrading system such that the upflowing reactor product fluid is introduced into an upper portion of a downflowing supercritical water reactor. The supercritical water petroleum upgrading system includes the upflowing supercritical water reactor and optionally a downflowing supercritical water reactor.Type: ApplicationFiled: August 16, 2017Publication date: February 8, 2018Inventors: Ki-Hyouk CHOI, Joo-Hyeong LEE, Mohammad S. GARHOUSH, Ali H. ALSHAREEF
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Publication number: 20170342332Abstract: A method for upgrading a petroleum feedstock using a supercritical water petroleum upgrading system includes introducing the petroleum feedstock, water and an auxiliary feedstock. The method includes operating the system to combine the petroleum feedstock and the water to form a mixed petroleum feedstock and introducing separately and simultaneously into a lower portion of an upflowing supercritical water reactor. The auxiliary feedstock is introduced such that a portion of a fluid contained within the upflowing reactor located proximate to the bottom does not lack fluid momentum. An embodiment of the method includes operating the supercritical water petroleum upgrading system such that the upflowing reactor product fluid is introduced into an upper portion of a downflowing supercritical water reactor. The supercritical water petroleum upgrading system includes the upflowing supercritical water reactor and optionally a downflowing supercritical water reactor.Type: ApplicationFiled: August 16, 2017Publication date: November 30, 2017Inventors: Ki-Hyouk CHOI, Joo-Hyeong LEE, Mohammad S. GARHOUSH, Ali H. ALSHAREEF
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Patent number: 9771527Abstract: A method for upgrading a petroleum feedstock using a supercritical water petroleum upgrading system includes introducing the petroleum feedstock, water and an auxiliary feedstock. The method includes operating the system to combine the petroleum feedstock and the water to form a mixed petroleum feedstock and introducing separately and simultaneously into a lower portion of an upflowing supercritical water reactor. The auxiliary feedstock is introduced such that a portion of a fluid contained within the upflowing reactor located proximate to the bottom does not lack fluid momentum. An embodiment of the method includes operating the supercritical water petroleum upgrading system such that the upflowing reactor product fluid is introduced into an upper portion of a downflowing supercritical water reactor. The supercritical water petroleum upgrading system includes the upflowing supercritical water reactor and optionally a downflowing supercritical water reactor.Type: GrantFiled: December 18, 2013Date of Patent: September 26, 2017Assignee: SAUDI ARABIAN OIL COMPANYInventors: Ki-Hyouk Choi, Joo-Hyeong Lee, Mohammad S. Garhoush, Ali H. Alshareef
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Patent number: 9749155Abstract: Provided is a method of blindly estimating WCDMA OVSF of a signal analyzer, which includes: (a) setting SF to 512 and an index thereof to 0; (b) calculating a power average value of a symbol obtained by despreading descrambled data with an OVSF code set by increasing the index from ‘0’ by ‘1’; (c) determining an OVSF code by which the power average value is equal to or greater than a power reference value as a used OVSF code candidate and determining an OVSF code by which the power average value is less than the power reference value as an unused OVSF code; (d) comparing a zero crossing rate of a symbol with a reference value to determine whether the OVSF code candidate is the used OVSF code; and (e) repeating (b) to (d) while reducing the SF half by half until the SF is equal to 4.Type: GrantFiled: January 26, 2017Date of Patent: August 29, 2017Assignee: INNOWIRELESS CO., LTD.Inventors: Jin Soup Joung, Joo Hyeong Lee, Yong Hoon Lim, Kyoung Hwan Ju
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Publication number: 20170237597Abstract: Provided is a method of processing a WCDMA signal timing offset for a signal analyzer. The method includes estimating an integer multiple timing offset of WCDMA baseband sample data corresponding to an amount of at least one frame; generating a frequency domain signal which is time delayed corresponding to a fractional timing offset estimation resolution after generating the frequency domain signal by performing an FFT calculation on an already-known reference signal; converting each time-delayed frequency domain signal into a time domain signal by performing an IFFT calculation on each time-delayed frequency domain signal and calculating a correlation between an input signal from a position of the integer multiple timing offset and the time domain signal; and estimating a delay time leading to a maximum correlation as a fractional timing offset.Type: ApplicationFiled: February 22, 2016Publication date: August 17, 2017Inventors: Jin Soup JOUNG, Joo Hyeong LEE, Yong Hoon LIM, Kyoung Hwan JU
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Publication number: 20170237585Abstract: Provided is a method of blindly estimating WCDMA OVSF of a signal analyzer, which includes: (a) setting SF to 512 and an index thereof to 0; (b) calculating a power average value of a symbol obtained by despreading descrambled data with an OVSF code set by increasing the index from ‘0’ by ‘1’; (c) determining an OVSF code by which the power average value is equal to or greater than a power reference value as a used OVSF code candidate and determining an OVSF code by which the power average value is less than the power reference value as an unused OVSF code; (d) comparing a zero crossing rate of a symbol with a reference value to determine whether the OVSF code candidate is the used OVSF code; and (e) repeating (b) to (d) while reducing the SF half by half until the SF is equal to 4.Type: ApplicationFiled: January 26, 2017Publication date: August 17, 2017Inventors: Jin Soup JOUNG, Joo Hyeong LEE, Yong Hoon LIM, Kyoung Hwan JU
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Publication number: 20170214477Abstract: Provided is a method of calibrating power for a MIMO-OFDM transmitter.Type: ApplicationFiled: February 22, 2016Publication date: July 27, 2017Inventors: Jin Soup JOUNG, Joo Hyeong LEE, Yong Hoon LIM, Byung Kwan JANG
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Publication number: 20170188313Abstract: Provided is a control method for a channel simulator, capable of expanding a processable dynamic range of an uplink signal receiving unit while adopting an A/D converter (ADC) having low resolution by adjusting an attenuation amount of the uplink signal receiving unit in a large-capacity channel simulator having P base stations and Q terminal interfaces.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Inventors: Jin Soup JOUNG, Joo Hyeong LEE, Yong Hoon LIM, Kyoung Hwan JU
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Publication number: 20170166824Abstract: Embodiments of processes for upgrading a petroleum-based composition while decreasing plugging comprise mixing a supercritical water stream with a pressurized, heated petroleum-based composition in a mixing device to create a combined feed stream, and introducing to a supercritical upgrading reactor system are provided. The processes also comprise cooling the upgraded product in a cooling device, and decreasing the pressure of the cooled upgraded product in a pressure reducer. To reduce plugging, the processes also comprises injecting plug remover solution into one or more of the following injection locations: an injection port on a process line connecting the mixing device with the upgrading reactor system; an injection port on a process line connecting the upgrading reactor system with the cooling device; or an injection port on a process line connecting the cooling device with the pressure reducer.Type: ApplicationFiled: December 9, 2016Publication date: June 15, 2017Applicant: Saudi Arabian Oil CompanyInventors: Ki-Hyouk Choi, Muneef F. Al-Qarzouh, Joo-Hyeong Lee, Bader M. Al-Otaibi, Abdullah T. Alabdulhadi
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Patent number: 9680586Abstract: Provided is a method for controlling a time division duplexing (TDD) Tx/Rx switching timing in a cloud radio access network (CRAN) that can finely control a switching timing between transmission and reception of TDD signals with an additional component added to a digital unit (DU) and a radio unit (RU) in the CRAN.Type: GrantFiled: May 22, 2014Date of Patent: June 13, 2017Assignee: INNOWIRELESS CO., LTD.Inventors: Jin-Soup Joung, Joo-Hyeong Lee, Tae-Beom Kim
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Patent number: 9670419Abstract: A process for reducing coke formation during hydrocarbon upgrading reactions using a double-wall reactor comprising the steps of feeding a heated feed water to a shell-side volume of the double-wall reactor to produce a heat transfer stream, the double-wall reactor comprising an exterior wall and an interior wall, a reaction section volume, a heating element configured to heat the heat transfer stream, wherein heat is transferred from the heat transfer stream to the reaction section volume, feeding the hot water return exiting the shell-side volume through a filter; mixing the filtered water stream with a heated hydrocarbon feedstock; feeding the mixed stream to the reaction section volume in a configuration counter-current to the heat transfer stream; reacting the reaction flow stream at a reaction temperature, wherein the heat transferred to the reaction section volume is operable to maintain the reaction temperature above the critical temperature of water.Type: GrantFiled: January 3, 2017Date of Patent: June 6, 2017Assignee: SAUDI ARABIAN OIL COMPANYInventors: Ki-Hyouk Choi, Joo-Hyeong Lee, Abdullah T. Alabdulhadi
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Publication number: 20170114286Abstract: A process for reducing coke formation during hydrocarbon upgrading reactions using a double-wall reactor comprising the steps of feeding a heated feed water to a shell-side volume of the double-wall reactor to produce a heat transfer stream, the double-wall reactor comprising an exterior wall and an interior wall, a reaction section volume, a heating element configured to heat the heat transfer stream, wherein heat is transferred from the heat transfer stream to the reaction section volume, feeding the hot water return exiting the shell-side volume through a filter; mixing the filtered water stream with a heated hydrocarbon feedstock; feeding the mixed stream to the reaction section volume in a configuration counter-current to the heat transfer stream; reacting the reaction flow stream at a reaction temperature, wherein the heat transferred to the reaction section volume is operable to maintain the reaction temperature above the critical temperature of water.Type: ApplicationFiled: January 3, 2017Publication date: April 27, 2017Inventors: Ki-Hyouk CHOI, Joo-Hyeong LEE, Abdullah T. ALABDULHADI