Patents by Inventor Gil Young Choi
Gil Young 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: 8054161Abstract: A method and apparatus for suppressing a transmit leakage signal of a radio frequency identification (RFID) reader is provided. The apparatus includes: a first power distributor distributing a transmission signal to output a first transmission signal and a second transmission signal; a second power distributor distributing the second transmission signal to output a third transmission signal and a fourth transmission signal; a first amplitude/phase converter converting an amplitude and a phase of the first transmission signal to generate a first converted signal; a second amplitude/phase converter converting an amplitude and a phase of the third transmission signal to generate a second converted signal; a first power combiner combining the first converted signal with a first leakage signal generated in association with the fourth transmission signal; and a second power combiner combining the second converted signal with a second leakage signal generated in association with the fourth transmission signal.Type: GrantFiled: December 4, 2008Date of Patent: November 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Donghan Lee, Ji-Hoon Bae, Cheng-Hao Quan, Kwang-Soo Cho, Gil Young Choi, Jong-Suk Chae, Sang-Gi Kang
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Patent number: 8009118Abstract: An open-ended two-strip meander line antenna, an RFID tag using the same and an antenna impedance matching method thereof are provided. The antenna includes: a radiating strip line for deciding a resonant frequency of the antenna; and a feeding strip line for providing a radio frequency (RF) signal to an element connected to the antenna, wherein ends of the radiating strip line and the feeding strip line are open.Type: GrantFiled: July 27, 2006Date of Patent: August 30, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Hae-Won Son, Won-Kyu Choi, Gil-Young Choi, Cheol-Sig Pyo
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Patent number: 7986229Abstract: An apparatus for storing sensing data in a tag and a method thereof are provided. According to the present invention, data measured by the sensor is stored in volatile memory and important data from among the data stored in the volatile memory is stored in non-volatile memory according to a pre-set data loss prevention mechanism so that a battery and the tag including the battery have a longer life and stability of data can be secured.Type: GrantFiled: October 31, 2007Date of Patent: July 26, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Junho Yeo, Josef Preishuber-Pfluegl, Alex Janek, Andreas Schuhai, Hae-Won Son, Jae-Young Jung, Hee-Sook Mo, Ji-Hoon Bae, Gil-Young Choi, Cheol-Sig Pyo, Jong-Suk Chae
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Patent number: 7982584Abstract: Provided are a mobile RFID reader and a control method thereof. The mobile RFID reader includes: a reader controller for beginning a reader operation to communicate with a tag in response to a command of a terminal controller of the wireless communication terminal; an anti-collision state machine for controlling collision among a plurality of tags, and transferring the result of communication with the tag to the reader controller; a reader transmitter for generating a reader command message decided at the anti-collision state machine, and coding and modulating the generated reader command message; a reader receiver for demodulating and decoding a tag signal received through an antenna, and reporting a tag response state to the anti-collision state machine; and a channel controller for selecting a channel to use to communicate with a tag in response to a command of the reader controller.Type: GrantFiled: September 25, 2006Date of Patent: July 19, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Ji-Hoon Bae, Hee-Sook Mo, Dong-Han Lee, Chan-Won Park, Gil-Young Choi, Cheol-Sig Pyo, Jong-Suk Chae
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Publication number: 20110148599Abstract: The RFID reader of an RFID system includes a processor for processing a command for the RFID tag and a response from the RFID tag, a modem for modulating the command from the processor or demodulating the response from the RFID, and an RF unit for transmitting the modulated command transferred from the modem to the RFID tag or receiving the response from the RFID tag and transferring the response to the modem. The RFID tag of the RFID system includes a power supply unit for generating energy using a radio wave received from the RFID reader, a receiver for demodulating a signal received from the RFID reader, a data processor for performing operation according to the signal demodulated by the receiver, and a transmitter for backscattering a signal from the data processor.Type: ApplicationFiled: October 27, 2010Publication date: June 23, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Chan Won Park, Man Sik Park, Ji Hoon Bae, Dong Han Lee, Kwang Soo Cho, Won Kyu Choi, Cheng Hao Quan, Jeong Seok Kim, Gil Young Choi, Jong Suk Chae
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Publication number: 20110148585Abstract: Disclosed are a passive RFID (Radio Frequency Identification) system and method capable of recognizing a great deal of tags at a high speed. A reader of a passive RFID system, including: a processor dividing slots and subchannels to configure a round, recognizing subchannels that are not involved in a collision and interference by the slots, and changing the subchannels that are not involved in a collision and interference, into a sleep state; a transmission unit encoding a command generated through the processor, performing an amplitude jitter modulation on the encoded command, and transmitting the modulated command; and a reception unit acquiring and demodulating tag signals received through a plurality of subchannels by the slots, and providing the demodulated tag signals to the processor.Type: ApplicationFiled: September 21, 2010Publication date: June 23, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Ji Hoon Bae, Cheng Hao Quan, Dong Han Lee, Chan Won Park, Won Kyu Choi, Kwang Soo Cho, Man Sik Park, Gil Young Choi, Jong Suk Chae
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Publication number: 20110140853Abstract: The present invention relates to an RFID reader and a signal receiving method thereof. The RFID reader according to one embodiment of the present invention down-converts transmission leakage signals introduced into a reader receiver and then suppresses them through a band stop filter in a low frequency band and up-converts them, thereby making it possible to effectively suppress the transmission leakage signals.Type: ApplicationFiled: June 21, 2010Publication date: June 16, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jae Young JUNG, Dong Beom Shin, Sang Yeoun Lee, Gil Young Choi, Heyung Sub Lee, Jong Suk Chae
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Publication number: 20110136445Abstract: Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.Type: ApplicationFiled: May 25, 2010Publication date: June 9, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Donghan LEE, Sang Gee KANG, Kwang-Soo CHO, Man Sik PARK, Chan-Won PARK, Cheng-Hao QUAN, Ji-Hoon BAE, Gil Young CHOI, Jong-Suk CHAE
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Patent number: 7940183Abstract: The present invention relates to an antenna for an RFID tag chip. The antenna includes a dielectric material, a radiating patch that scatters a signal from the RFID tag chip for transmitting the scattered signal, and microstrip lines having a terminal for the RFID tag chip. Accordingly, a small antenna that can be attached to metal can be realized.Type: GrantFiled: May 23, 2008Date of Patent: May 10, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Jeong Seok Kim, Won Kyu Choi, Gil Young Choi, Cheol Sig Pyo, Jong-suk Chae
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Publication number: 20110102151Abstract: Provided are an RFID reader and a method for controlling a gain thereof. The RFID reader includes an amplifier and an AGC circuit. The amplifier controls the gain of an RX signal, received from an RFID tag, in response to an AGC signal. The AGC circuit measures a signal level in an ante-preamble period of the RX signal and generates an AGC signal to control the gain of the RX signal, on the basis of the measured signal level.Type: ApplicationFiled: July 9, 2010Publication date: May 5, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Dong-Beom Shin, Jae-young Jung, Sang Yeoun Lee, Gil Young Choi, Heyung Sub Lee, Jong-Suk Chae
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Publication number: 20110096883Abstract: Provided is a symbol synchronization apparatus and method of a passive REID reader. The symbol synchronization apparatus includes: an edge clock detector generating edge clocks by detecting phase inversion positions of a received signal; a preamble detector detecting a preamble section by analyzing the generation times of the edge clocks; a symbol decision time extractor extracting a symbol decision time by averaging distances between the edge clocks consecutively generated in the preamble section, when the preamble section is detected; and a symbol decider deciding a symbol by analyzing the magnitude of the received signal, when the time reaches the symbol decision time.Type: ApplicationFiled: July 8, 2010Publication date: April 28, 2011Inventors: Ji Hoon Bae, Dong Han Lee, Kwang Soo Cho, Won Kyu Choi, Man Sik Park, Chan Won Park, Cheng Hao Quan, Gil Young Choi, Jong Suk Chae
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Patent number: 7933577Abstract: Provided are a method and apparatus for sharing a portable terminal in a Code Division Multiple Access (CDMA) and a mobile Radio Frequency Identification (RFID) system. The portable terminal includes: a CDMA mobile station system for performing CDMA communication; a mobile RFID system for performing a passive RFID reader function; a switching unit for switching an antenna to any one between the CDMA mobile station system and the mobile RFID system; and a control unit for controlling the switching unit to connect the antenna to the CDMA mobile station system when the portable terminal transmits/receives a signal to/from the base station, or connect the antenna to the mobile RFID system when the portable terminal transmits/receives a signal to/from an RFID tag.Type: GrantFiled: November 16, 2006Date of Patent: April 26, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Chan-Soo Shin, Hae-Won Son, Won-Kyu Choi, Gil-Young Choi, Cheol-Sig Pyo, Jong-Suk Chae
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Publication number: 20110090130Abstract: An RFID reader antenna including: a printed circuit board (PCB) formed as a dielectric substance; a plurality of slot groups, each having a plurality of slots, disposed on a first face of the PCB; a ground face disposed on areas, excluding the plurality of slot groups, of the first face of the PCB; and a feeder formed as a microstrip line with an open end on a second face of the PCB to feed the plurality of slot groups. Because the slots periodically formed on the ground face are fed in series by using the single microstrip line, the RFID reader antenna can reliably recognize a larger area with a simple structure. In particular, the RFID reader antenna can be useful for the bookstands for book management or smart shelves for displaying articles or goods including clothing goods in superstores or hypermarkets through the use of the ILT RFID application.Type: ApplicationFiled: September 30, 2010Publication date: April 21, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Won Kyu CHOI, Jeong Seok KIM, Ji Hoon BAE, Gil Young CHOI, Jong Suk CHAE
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Publication number: 20110074555Abstract: Provided are a mobile Radio Frequency Identification (RFID) device and a data communication method thereof. In the method, a mobile communication terminal unit provides a command to an mRFID reader unit and receives a response to the command from the mRFID reader unit. It is checked whether there is an error in a protocol message of the command or the response, and the command to the mRFID reader unit according to a check result is re-transmitted.Type: ApplicationFiled: August 20, 2010Publication date: March 31, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chan-Won Park, Man Sik Park, Ji-Hoon Bae, Donghan Lee, Kwang-Soo Cho, Won Kyu Choi, Cheng-Hao Quan, Jeong seok Kim, Gil Young Choi, Jong-Suk Chae
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Publication number: 20110064165Abstract: A demodulation apparatus for a Radio Frequency Identification (RFID) reader includes: a direct current (DC) offset cancellation unit for cancelling DC-offset noise contained in a PSK-modulated or ASK-modulated subcarrier tag signal from the tag signal when the tag signal is received; and a subcarrier digital demodulator for eliminating a subcarrier from the tag signal from which DC-offset noise has been cancelled to demodulate the DC-offset noise-cancelled tag signal.Type: ApplicationFiled: November 25, 2009Publication date: March 17, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Ji-Hoon BAE, Donghan LEE, Kwang-Soo CHO, Man Sik PARK, Chan-Won PARK, Cheng-Hao QUAN, Won Kyu CHOI, Gil Young CHOI, Jong-Suk CHAE
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Patent number: 7893834Abstract: Provided is a power control method for a mobile Radio Frequency Identification (RFID) reader and an RFID reader using the same. The RFID reader includes: an RFID reader transmission/reception control unit for creating a message to be transmitted to an RFID tag and transmitting RFID tag information to a terminal control unit; a reader transmitting unit for encoding and modulating the created message; a power amplifier for amplifying an output signal; a reader receiving unit for demodulating and decoding the signal and transmitting the signal to the RFID reader transmission/reception control unit; and an RFID reader power control unit for controlling power, wherein when the RFID reader transmission/reception control unit receives a command for acquiring the RFID tag information, the RFID reader power control unit applies power to the power amplifier.Type: GrantFiled: November 29, 2006Date of Patent: February 22, 2011Assignees: Electronics and Telecommunications Research Institute, SK Telecom Co., Ltd.Inventors: Chan-Won Park, Dong-Han Lee, Hoe-Sung Yang, Gil-Young Choi, Cheol-Sig Pyo, Jong-Suk Chae, Joo-Moon Lee, Gene-Hee Yoon, Taejeen Shin
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Patent number: 7884723Abstract: Provided are a radio frequency identification (RFID) tag and a wake-up method thereof. The RFID tag includes: a power source that supplies a driving voltage; a continuous wave detector that receives the driving voltage from the power supply so as to detect a continuous wave in a signal received from an RFID tag reader; a command detector that selectively receives the driving voltage and detects a command in the signal; and a controller that executes the command detected by the command detector by supplying the driving voltage to the command detector if the continuous wave is detected, and stops the driving voltage from being supplied to the command detector if no command is received from the command detector for a predetermined time period.Type: GrantFiled: October 30, 2007Date of Patent: February 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Jae-Young Jung, Hae Won Son, Jong Hyun Seo, Junho Yeo, Gil Young Choi, Nae Soo Kim, Cheol Sig Pyo, Jong Suk Chae
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Patent number: 7876269Abstract: An antenna attached to an object and transmitting electromagnetic waves that are modulated by an RFID tag chip includes a polygonal dielectric material layer that is adjacent to the object, a microstrip patch that determines a resonance frequency of the antenna, a microstrip line that is electromagnetically coupled with the microstrip match, and a shorting pin that disconnects the object and the microstrip line. Accordingly, a small-sized antenna that can be attached to metal can be realized.Type: GrantFiled: June 9, 2008Date of Patent: January 25, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Won Kyu Choi, Jeong Seok Kim, Gil Young Choi, Cheol Sig Pyo
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Publication number: 20100314453Abstract: Disclosed is a Radio Frequency Identification (RFID) tag antenna. The tag antenna includes a lower dielectric substrate and an upper dielectric substrate. The lower dielectric substrate is provided at a lower surface thereof with a ground plane and at an upper surface thereof with two microstrip lines. The microstrip lines each have an open-end, the open ends spaced apart from each other from a middle of the lower dielectric substrate while facing each other to form a radiating slot from which radiation of electromagnetic waves occurs. The upper dielectric substrate is provided at an upper surface thereof with at least one electric capacitive device and is stacked on the lower dielectric substrate. The RFID tag antenna enhances radiation efficiency while achieving miniaturization.Type: ApplicationFiled: January 15, 2010Publication date: December 16, 2010Inventors: Jeong-seok Kim, Hae-won Son, Won-kyu Choi, Gil-young Choi, Jong-suk Chae
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Publication number: 20100314452Abstract: An apparatus and method of generating a wake-up signal from a passive tag with a battery is provided. According to the present invention, since a wake-up signal is generated by a signal received from a Radio Frequency Identification (RFID) reader, battery life can be extended. That is, a wake-up signal can be generated for the battery to be operated according to a signal from the RFID reader so that the battery included in the tag can be controlled from the RFID reader, thereby controlling the amount of battery power consumed. Therefore, the battery life and the life of the tag including the battery can be increased.Type: ApplicationFiled: December 7, 2007Publication date: December 16, 2010Applicant: Electronics and Telecommunications Research InstituteInventors: Junho Yeo, Josef Preishub, Alex Janek, Andreas Schuhai, Hae-Won Son, Jae-Young Jung, Hee-Sook Mo, Ji-Hoon Bae, Gil-Young Choi, Cheol-Sig Pyo, Jong-Suk Chae