Patents by Inventor Pil Jae Park

Pil Jae Park 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).

  • Patent number: 10641883
    Abstract: Provided is a pulse radar device including: a TX unit configured to emit a TX pulse according to a single TX clock signal; a multiple-RX units configured to receive echo pulses received through a plurality of RX antennas according to multiple RX clock signals; a pulse radar driving unit configured to generate the single TX clock signal and the multiple RX clock signals using a reference clock signal. The pulse radar driving unit provides the single TX clock signal and the multiple RX clock signals for the TX unit and the multiple-RX unit. The pulse radar driving unit adjusts an RX clock-to-clock delay that is the delay between the multiple RX clock signals so as to adjust a directivity of the multiple-RX unit, and a TX-to-RX delay between the single TX clock signal and the multiple RX clocks signals so as to adjust a detection range.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: May 5, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Seong-Do Kim
  • Patent number: 10627501
    Abstract: Disclosed are a pulse radar apparatus and an operating method of the pulse radar apparatus, the pulse radar apparatus including a transmitter configured to receive a reference signal as a transmission clock signal, and transmit a transmission pulse to an object based on the transmission clock signal, a negative feedback loop configured to delay the reference signal and output the delayed reference signal as a reception clock signal, and a receiver configured to restore, based on the reception clock signal, a reflection pulse received in response to the transmission pulse being reflected from the object, wherein the negative feedback loop is configured to generate a delay control signal using the reference signal and a predetermined waveform signal generated by a waveform generator, delay the reference signal based on the delay control signal, and adjust the delay control signal by controlling the waveform generator to change the predetermined waveform signal.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: April 21, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Seong Do Kim, Ki Su Kim, Mun Yang Park
  • Publication number: 20190377079
    Abstract: Provided is a radar apparatus. The radar apparatus includes a controller configured to generate a variable delay control signal whose value varies with time, a clock generator configured to generate a transmission clock and a reception clock delayed by a delay time varying according to the variable delay control signal than the transmission clock, a transmitter configured to emit a transmission pulse through a transmission antenna based on the transmission clock, a first receiver configured to receive a first echo pulse that the transmission pulse is reflected from a target through a first reception antenna and configured to generate a first recovery signal corresponding to the first echo pulse based on the reception clock, and a second receiver configured to receive a second echo pulse that is the transmission pulse reflected from the target through a second reception antenna and configured to generate a second recovery signal corresponding to the second echo pulse based on the reception clock.
    Type: Application
    Filed: June 7, 2019
    Publication date: December 12, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae PARK, Seongdo KIM
  • Publication number: 20190178984
    Abstract: Provided is a radar device including a clock generator, a transmitter, and a receiver. The clock generator may output a transmission clock, and output a reception clock after a delay from a time at which the transmission clock is output. The transmitter may include a transmission trigger signal generator to generate a transmission trigger signal based on the transmission clock and an oscillator configured to generate a first signal on the basis of the transmission trigger signal. The first signal and the transmission trigger signal may include a pulse, and a width and a magnitude of the pulse included in the first signal correspond to a width and a magnitude of the pulse included in the transmission trigger signal, respectively. The receiver may be configured to receive an echo signal corresponding to the first signal to generate a second signal based on the reception clock.
    Type: Application
    Filed: November 19, 2018
    Publication date: June 13, 2019
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT UTE
    Inventors: Pil Jae PARK, Seongdo KIM
  • Publication number: 20190025417
    Abstract: A radar device according to an embodiment of the inventive concept includes a clock generator, a transmitter, a receiver, and a signal processor. The clock generator outputs the transmission clock, outputs the reception clock at the second time after the delay from the first time when the transmission clock is outputted, and generates the notification signal when the delay has the minimum value. The transmitter emits a transmission signal based on the transmission clock. The receiver receives an echo signal corresponding to the transmission signal, and generates a first signal corresponding to the echo signal based on the reception clock. The signal processor obtains a third time point at which a delay has the minimum value based on the notification signal.
    Type: Application
    Filed: July 17, 2018
    Publication date: January 24, 2019
    Inventors: Pil Jae PARK, Seongdo KIM, Bon Tae KOO
  • Publication number: 20180059232
    Abstract: Provided is a pulse radar device including: a TX unit configured to emit a TX pulse according to a single TX clock signal; a multiple-RX units configured to receive echo pulses received through a plurality of RX antennas according to multiple RX clock signals; a pulse radar driving unit configured to generate the single TX clock signal and the multiple RX clock signals using a reference clock signal. The pulse radar driving unit provides the single TX clock signal and the multiple RX clock signals for the TX unit and the multiple-RX unit. The pulse radar driving unit adjusts an RX clock-to-clock delay that is the delay between the multiple RX clock signals so as to adjust a directivity of the multiple-RX unit, and a TX-to-RX delay between the single TX clock signal and the multiple RX clocks signals so as to adjust a detection range.
    Type: Application
    Filed: August 21, 2017
    Publication date: March 1, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: PIL JAE PARK, Seong-Do KIM
  • Publication number: 20170285138
    Abstract: Disclosed are a pulse radar apparatus and an operating method of the pulse radar apparatus, the pulse radar apparatus including a transmitter configured to receive a reference signal as a transmission clock signal, and transmit a transmission pulse to an object based on the transmission clock signal, a negative feedback loop configured to delay the reference signal and output the delayed reference signal as a reception clock signal, and a receiver configured to restore, based on the reception clock signal, a reflection pulse received in response to the transmission pulse being reflected from the object, wherein the negative feedback loop is configured to generate a delay control signal using the reference signal and a predetermined waveform signal generated by a waveform generator, delay the reference signal based on the delay control signal, and adjust the delay control signal by controlling the waveform generator to change the predetermined waveform signal.
    Type: Application
    Filed: January 9, 2017
    Publication date: October 5, 2017
    Inventors: Pil Jae PARK, Seong Do KIM, Ki Su KIM, Mun Yang PARK
  • Patent number: 9581688
    Abstract: A pulse radar apparatus is disclosed. The pulse radar apparatus includes a pulse generation unit, a receiver unit, a synchronization unit, and a switch unit. The pulse generation unit generates a pulse based on a transmission trigger signal having a transmission pulse repetition period, and sends the pulse to a target via a transmission antenna. The synchronization unit generates the transmission trigger signal using an external reference clock, provides the transmission trigger signal to the pulse generation unit, and generates a plurality of clock signals having a time delay with respect to the transmission pulse trigger signal using the external reference clock. The switch unit selects any one clock signal from the plurality of clock signals in response to an external selection signal, and provides the selected clock signal to a receiver unit which utilizes a sampler with provided sampling clocks.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: February 28, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Pil-Jae Park, Cheon-Soo Kim, Seong-Do Kim, Sung-Chul Woo
  • Patent number: 9013347
    Abstract: An embodiment of the present invention relates to a radar apparatus, wherein a distance to a target and a velocity of the target are measured by transmitting a digitally modulated transmitting signal using a digital code and receiving and demodulating an echo signal returned due to reflection of the transmitting signal from the target.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: April 21, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Cheon Soo Kim, Hyun Kyu Yu, Min Park, Ik Soo Eo
  • Publication number: 20140354469
    Abstract: A pulse radar apparatus is disclosed. The pulse radar apparatus includes a pulse generation unit, a receiver unit, a synchronization unit, and a switch unit. The pulse generation unit generates a pulse based on a transmission trigger signal having a transmission pulse repetition period, and sends the pulse to a target via a transmission antenna. The synchronization unit generates the transmission trigger signal using an external reference clock, provides the transmission trigger signal to the pulse generation unit, and generates a plurality of clock signals having a time delay with respect to the transmission pulse trigger signal using the external reference clock. The switch unit selects any one clock signal from the plurality of clock signals in response to an external selection signal, and provides the selected clock signal to a receiver unit which utilizes a sampler with provided sampling clocks.
    Type: Application
    Filed: May 2, 2014
    Publication date: December 4, 2014
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Pil-Jae PARK, Cheon-Soo KIM, Seong-Do KIM, Sung-Chul WOO
  • Patent number: 8902103
    Abstract: Disclosed is a radar apparatus supporting short range and long range radar operations, wherein a plurality of short range transmitting chirp signals and a plurality of long range transmitting chirp signals are generated by a predetermined modulation scheme and is transmitted to an object through at least one transmitting array antenna and signals reflected from the object is received through at least one receiving array antenna, and the plurality of long range transmitting chirp signals have transmission power larger than that for the plurality of short range transmitting chirp signals.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: December 2, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Cheon Soo Kim, Pil Jae Park, Min Park, Kyung Hwan Park, Dong-Young Kim, Jeong-Geun Kim, Bon Tae Koo, Hyun Kyu Yu
  • Patent number: 8880376
    Abstract: An apparatus and method for identifying a human being and an animal are disclosed to properly identifying whether or not a target is a human being or an animal. The apparatus for distinguishing between a human being and an animal includes: a target stimulation unit generating a stimulation signals for selectively stimulating the senses of a human being and an animal and providing the generated stimulation signal to a target; and a target identifying unit detecting the reaction of a target to the simulation signal to identify whether or not the target is a human being or an animal.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: November 4, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Hyun Kyu Yu, Seong Do Kim, Sung Chul Woo
  • Patent number: 8754806
    Abstract: A pulse radar receiver includes a power splitter configured to split a transmit (TX) trigger signal for generating a TX pulse, a phase-locked loop (PLL) configured to receive a division ratio and the TX trigger signal split by the power splitter, and generate a sampling frequency, and a sampler configured to sample a reflected wave received through an RX antenna, according to the sampling frequency generated by the PLL. Accordingly, it is possible to provide a high distance resolution by generating a sampling frequency with a difference from a TX pulse to sample a reflected wave received through an RX antenna. Thus, it is possible to overcome a limitation in the distance resolution due to the pulse width and to measure a minute movement at a short distance. Therefore, the pulse radar receiver is applicable to high range resolution radar applications such as a living body measuring radar.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: June 17, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Seong Do Kim, Sung Chul Woo, Hyun Kyu Yu
  • Patent number: 8737554
    Abstract: Disclosed is a pulse-signal recovering device with a time-interleaving scheme. Exemplary embodiments of the present invention can improve receive performance of a radar so as to shorten pre-scanning time for roughly determining presence and absence of objects and time consumed to recover received pulse signals in the radar receiver with the sub-sampling scheme by simultaneously sensing signal levels of the received pulse signals at several positions and improve a signal to noise ratio by increasing an averaging rate with respect to the number of same received pulses.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: May 27, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seong-Do Kim, Pil Jae Park, Sung Chul Woo, Hyun Kyu Yu
  • Publication number: 20130321198
    Abstract: A MIMO radar system includes one or more receivers and transmitters. Any one of the one or more transmitters provides a reference signal for injection-locking. The MIMO radar system generates multiple signals having phase and frequency which are injection-locked to those of the reference signal.
    Type: Application
    Filed: February 5, 2013
    Publication date: December 5, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae PARK, Cheon Soo Kim, Hyun Kyu Yu
  • Patent number: 8542773
    Abstract: A digital RF converter, a digital RF modulator, and a transmitter are provided. The digital RF converter includes a delta-sigma modulated bits (DSMB) sub-block that generates a current magnitude corresponding to least-significant n bits among input signals at a first sampling speed, a least-significant bit (LSB) sub-block that generates a current magnitude corresponding to intermediate k bits among the input signals at a second sampling speed lower than the first sampling speed, and a most-significant bit (MSB) sub block that generates a current magnitude corresponding to most-significant m bits among the inputs signals at the second sampling speed.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 24, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyun Kyu Yu, Jang Hong Choi, Hyun Ho Boo, Pil Jae Park, Mun Yang Park, Seong Do Kim, Sun Bo Shim, Song Cheol Hong
  • Publication number: 20130183912
    Abstract: There is provided a baseband structure of a transceiver. In an embodiment, a baseband structure of a transceiver includes a Variable Gain Amplifier (VGA) configured to amplify an input signal by controlling a gain, one or more Fixed Gain Amplifiers (FGAs) connected in series to the VGA and configured to amplify an output signal of the VGA, and one or more selection switches configured to selectively operate the FGAs. In accordance with the present invention, since a plurality of FGAs is selectively driven according to a necessary gain and an LPFG includes an FGA, power consumption and the size of a chip can be reduced and the overall performance of a transceiver can be improved.
    Type: Application
    Filed: July 18, 2012
    Publication date: July 18, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Duong Quoc Hoang, Cheon Soo KIM, Pil Jae PARK, Min PARK, Hyun Kyu YU
  • Publication number: 20120262330
    Abstract: An embodiment of the present invention relates to a radar apparatus, wherein a distance to a target and a velocity of the target are measured by transmitting a digitally modulated transmitting signal using a digital code and receiving and demodulating an echo signal returned due to reflection of the transmitting signal from the target.
    Type: Application
    Filed: April 12, 2012
    Publication date: October 18, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae PARK, Cheon Soo Kim, Hyun Kyu Yu, Min Park, Ik Soo EO
  • Publication number: 20120235857
    Abstract: Disclosed is a radar apparatus supporting short range and long range radar operations, wherein a plurality of short range transmitting chirp signals and a plurality of long range transmitting chirp signals are generated by a predetermined modulation scheme and is transmitted to an object through at least one transmitting array antenna and signals reflected from the object is received through at least one receiving array antenna, and the plurality of long range transmitting chirp signals have transmission power larger than that for the plurality of short range transmitting chirp signals.
    Type: Application
    Filed: March 15, 2012
    Publication date: September 20, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Cheon Soo KIM, Pil Jae Park, Min Park, Kyung Hwan Park, Dong-Young Kim, Jeong-Geun Kim, Bon Tae Koo, Hyun Kyu Yu
  • Publication number: 20120146852
    Abstract: A pulse radar receiver includes a power splitter configured to split a transmit (TX) trigger signal for generating a TX pulse, a phase-locked loop (PLL) configured to receive a division ratio and the TX trigger signal split by the power splitter, and generate a sampling frequency, and a sampler configured to sample a reflected wave received through an RX antenna, according to the sampling frequency generated by the PLL. Accordingly, it is possible to provide a high distance resolution by generating a sampling frequency with a difference from a TX pulse to sample a reflected wave received through an RX antenna. Thus, it is possible to overcome a limitation in the distance resolution due to the pulse width and to measure a minute movement at a short distance. Therefore, the pulse radar receiver is applicable to high range resolution radar applications such as a living body measuring radar.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 14, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Seong Do Kim, Sung Chul Woo, Hyun Kyu Yu