Patents by Inventor Chul Roh

Chul Roh 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: 11438882
    Abstract: A method for uplink (UL) wireless backhaul communication at a wireless backhaul remote unit in a radio access network comprising receiving a configuration for radio frames and a transmission schedule through a downlink (DL) physical layer broadcast channel, wherein the transmission schedule comprises a transmission allocation for the remote unit, generating a UL data frame, wherein generating the UL data frame comprises performing forward error correction (FEC) encoding on a data bit stream to generate a plurality of FEC codewords, wherein performing the FEC encoding comprises performing Reed Solomon (RS) encoding on the data bit stream to generate a plurality of RS codewords, performing byte interleaving on the RS codewords, and performing Turbo encoding on the byte interleaved RS codewords to generate one or more Turbo codewords, wherein each Turbo codeword is encoded from more than one RS codeword, and transmitting the UL data frame according to the transmission allocation.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: September 6, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: June Chul Roh, Pierre Bertrand, Srinath Hosur, Vijay Pothukuchi, Mohamed Farouk Mansour
  • Patent number: 11412937
    Abstract: A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return-mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: August 16, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Adeel Ahmad, Dan Wang, June Chul Roh
  • Publication number: 20220149986
    Abstract: A method for performing code block segmentation for wireless transmission using concatenated forward error correction encoding includes receiving a transport block of data for transmission having a transport block size, along with one or more parameters that define a target code rate. A number N of inner code blocks needed to transmit the transport block is determined. A number M—outer code blocks may be calculated based on the number of inner code blocks and on encoding parameters for the outer code blocks. The transport block may then be segmented and encoded according to the calculated encoding parameters.
    Type: Application
    Filed: January 24, 2022
    Publication date: May 12, 2022
    Inventors: June Chul Roh, Pierre Bartand
  • Publication number: 20220041952
    Abstract: Disclosed is a method of preparing krill oil. A method of preparing krill oil may include providing a dried krill powder; obtaining an extract after adding spirits of wine to the dried krill powder; obtaining a passing solution from which salt and cholesterol are removed by passing the extract through a column; obtaining a krill concentrate by decompression-concentrating the passing solution; and obtaining krill oil by stationarily positioning a mixture obtained by adding spirits of wine to the krill concentrate, layer-separating the stationarily positioned mixture, extracting a supernatant of the layer-separated mixture, and concentrating the extracted supernatant.
    Type: Application
    Filed: November 20, 2020
    Publication date: February 10, 2022
    Inventors: Jin Chul ROH, Ju Young SONG, Jun Gu LIM
  • Patent number: 11233602
    Abstract: A method for performing code block segmentation for wireless transmission using concatenated forward error correction encoding includes receiving a transport block of data for transmission having a transport block size, along with one or more parameters that define a target code rate. A number N of inner code blocks needed to transmit the transport block is determined. A number M-outer code blocks may be calculated based on the number of inner code blocks and on encoding parameters for the outer code blocks. The transport block may then be segmented and encoded according to the calculated encoding parameters.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: January 25, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: June Chul Roh, Pierre Bartand
  • Publication number: 20210405150
    Abstract: Systems and methods are provided for a radar processing chain for frequency-modulated continuous wave radar systems. A transmitter transmits a plurality of chirps, each comprising an electromagnetic radiation signal, at a region of interest. A receiver front-end receives reflected electromagnetic radiation for each chirp and generates a time series of beat-signal samples for each chirp at each antenna of a plurality of antennas. A signal processor detects objects within the region of interest by providing a frequency domain representation of each time series of beat-signal samples as sample values for a set of range bins representing respective distances from the receiver, correcting the sample values for each of the set of range bins to provide a set of clutter corrected samples for each range bin, and determining an angular spectrum for each of a subset of the set of range bins from the clutter corrected samples.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Inventor: JUNE CHUL ROH
  • Publication number: 20210307001
    Abstract: A method for communicating over a wireless backhaul channel comprising generating a radio frame comprising a plurality of time slots, wherein each time slot comprises a plurality of symbols in time and a plurality of sub-carriers in a system bandwidth, broadcasting a broadcast channel signal comprising a transmission schedule to a plurality of remote units in a number of consecutive sub-carriers centered about a direct current (DC) sub-carrier in at least one of the time slots in the radio frame regardless of the system bandwidth, and transmitting a downlink (DL) control channel signal and a DL data channel signal to a first of the remote units, wherein the DL data channel signal is transmitted by employing a single carrier block transmission scheme comprising a Discrete Fourier Transform (DFT) spreading for frequency diversity.
    Type: Application
    Filed: December 28, 2020
    Publication date: September 30, 2021
    Inventors: June Chul Roh, Pierre Bertrand, Srinath Hosur, Vijay Pothukuchi, Mohamed Farouk Mansour
  • Patent number: 11119186
    Abstract: Systems and methods are provided for a radar processing chain for frequency-modulated continuous wave radar systems. A transmitter transmits a plurality of chirps, each comprising an electromagnetic radiation signal, at a region of interest. A receiver front-end receives reflected electromagnetic radiation for each chirp and generates a time series of beat-signal samples for each chirp at each antenna of a plurality of antennas. A signal processor detects objects within the region of interest by providing a frequency domain representation of each time series of beat-signal samples as sample values for a set of range bins representing respective distances from the receiver, correcting the sample values for each of the set of range bins to provide a set of clutter corrected samples for each range bin, and determining an angular spectrum for each of a subset of the set of range bins from the clutter corrected samples.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: September 14, 2021
    Assignee: Texas Instruments Incorporated
    Inventor: June Chul Roh
  • Publication number: 20210126656
    Abstract: A system and method for providing error control coding for backhaul applications are disclosed. Data is first encoded using Reed-Solomon (RS) coding. The output RS blocks are then turbo coded. The size of the output RS blocks is selected to match the input of the turbo encoder. The bits from the RS blocks may be interleaved to create the input turbo blocks. Cyclic Redundancy Check (CRC) parity bits may be added to the data prior to RS coding.
    Type: Application
    Filed: January 4, 2021
    Publication date: April 29, 2021
    Inventors: Mohamed Farouk Mansour, June Chul Roh, Srinath Hosur
  • Publication number: 20210052230
    Abstract: Disclosed herein is a frailty diagnosis apparatus. The frailty diagnosis apparatus includes a physical performance meter and a processor for determining a frailty index of a target person based on physical performance of the target person obtained by the physical performance meter. The physical performance meter includes at least one among a gait speed meter for measuring a gait speed of the target person, a body balance meter for measuring a body balance maintenance time of the target person, and a muscle strength meter for measuring a muscle exercise time.
    Type: Application
    Filed: March 29, 2019
    Publication date: February 25, 2021
    Inventor: Hyun Chul Roh
  • Patent number: 10911062
    Abstract: A method includes receiving multiple bits to be transmitted. The method also includes applying a first binary alphabet polar code to a first subset of the multiple bits to generate first encoded bits. The first encoded bits are associated with a first bit level of a multilevel coding scheme. The method further includes generating one or more symbols using the first encoded bits and bits associated with a second bit level of the multilevel coding scheme. The first binary alphabet polar code is associated with a first coding rate. In addition, the method could include applying a second binary alphabet polar code to a second subset of the multiple bits to generate second encoded bits. The second encoded bits are associated with the second bit level. The second binary alphabet polar code is associated with a second coding rate such that the bit levels have substantially equal error rates.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: February 2, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Corina Ioana Ionita, Jun Chul Roh, Mohamed F. Mansour, Srinath Hosur
  • Patent number: 10886949
    Abstract: Disclosed embodiments include a device having a transmitter circuit that includes an input to receive data blocks that are part of a set of incoming data, a parity bit generator to append a number of parity bits to each of the received data blocks, a first encoder to apply a first type of encoding to create first coded blocks based on the received data blocks and the parity bits, an interleaver to interleave symbols in the first coded blocks to create additional blocks having a block size, wherein the number of parity bits appended to each of the received blocks is based on the block size, and a second encoder to apply a second type of encoding to create an output based on the additional blocks, wherein the second type of encoding is different from the first type of encoding.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: January 5, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Mohamed Farouk Mansour, June Chul Roh, Srinath Hosur
  • Patent number: 10856124
    Abstract: In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: December 1, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anuj Batra, Timothy M. Schmidl, Srinath Hosur, June Chul Roh
  • Publication number: 20200344749
    Abstract: A method for uplink (UL) wireless backhaul communication at a wireless backhaul remote unit in a radio access network comprising receiving a configuration for radio frames and a transmission schedule through a downlink (DL) physical layer broadcast channel, wherein the transmission schedule comprises a transmission allocation for the remote unit, generating a UL data frame, wherein generating the UL data frame comprises performing forward error correction (FEC) encoding on a data bit stream to generate a plurality of FEC codewords, wherein performing the FEC encoding comprises performing Reed Solomon (RS) encoding on the data bit stream to generate a plurality of RS codewords, performing byte interleaving on the RS codewords, and performing Turbo encoding on the byte interleaved RS codewords to generate one or more Turbo codewords, wherein each Turbo codeword is encoded from more than one RS codeword, and transmitting the UL data frame according to the transmission allocation.
    Type: Application
    Filed: May 11, 2020
    Publication date: October 29, 2020
    Inventors: June Chul Roh, Pierre Bertrand, Srinath Hosur, Vijay Pothukuchi, Mohamed Farouk Mansour
  • Publication number: 20200275863
    Abstract: Provided is a frailty diagnosis method including: setting, by a processor, a setting value for measuring a walking speed according to positions of at least two measuring devices; detecting, by the at least two measuring devices, a movement of a frailty diagnosis-target person; measuring, by the processor, a walking speed of the frailty diagnosis-target person based on the movement of the frailty diagnosis-target person according to the setting value; and determining, by the processor, a frailty index of the frailty diagnosis-target person based on the measured walking speed.
    Type: Application
    Filed: September 6, 2018
    Publication date: September 3, 2020
    Inventors: Hee Won Jung, Hyun Chul Roh
  • Publication number: 20200259623
    Abstract: A method of operating a wireless communication system is disclosed. The method includes receiving respective downlink transmissions at N second transceivers from a first transceiver, where N is a positive integer greater than 1. The reception acknowledgment signals by the N second transceivers are combined into a single reception acknowledgment signal and transmitted to the first transceiver.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 13, 2020
    Inventors: Pierre Bertrand, June Chul Roh, Jun Yao
  • Patent number: 10652867
    Abstract: A method for uplink (UL) wireless backhaul communication at a wireless backhaul remote unit in a radio access network comprising receiving a configuration for radio frames and a transmission schedule through a downlink (DL) physical layer broadcast channel, wherein the transmission schedule comprises a transmission allocation for the remote unit, generating a UL data frame, wherein generating the UL data frame comprises performing forward error correction (FEC) encoding on a data bit stream to generate a plurality of FEC codewords, wherein performing the FEC encoding comprises performing Reed Solomon (RS) encoding on the data bit stream to generate a plurality of RS codewords, performing byte interleaving on the RS codewords, and performing Turbo encoding on the byte interleaved RS codewords to generate one or more Turbo codewords, wherein each Turbo codeword is encoded from more than one RS codeword, and transmitting the UL data frame according to the transmission allocation.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: May 12, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: June Chul Roh, Pierre Bertrand, Srinath Hosur, Vijay Pothukuchi, Mohamed Farouk Mansour
  • Patent number: 10652003
    Abstract: A method of operating a wireless communication system is disclosed. The method includes receiving respective downlink transmissions at N second transceivers from a first transceiver, where N is a positive integer greater than 1. The reception acknowledgement signals by the N second transceivers are combined into a single reception acknowledgement signal and transmitted to the first transceiver.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: May 12, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Pierre Bertrand, June Chul Roh, Jun Yao
  • Publication number: 20200021307
    Abstract: A method includes receiving multiple bits to be transmitted. The method also includes applying a first binary alphabet polar code to a first subset of the multiple bits to generate first encoded bits. The first encoded bits are associated with a first bit level of a multilevel coding scheme. The method further includes generating one or more symbols using the first encoded bits and bits associated with a second bit level of the multilevel coding scheme. The first binary alphabet polar code is associated with a first coding rate. In addition, the method could include applying a second binary alphabet polar code to a second subset of the multiple bits to generate second encoded bits. The second encoded bits are associated with the second bit level. The second binary alphabet polar code is associated with a second coding rate such that the bit levels have substantially equal error rates.
    Type: Application
    Filed: September 26, 2019
    Publication date: January 16, 2020
    Inventors: Corina Ioana Ionita, Jun Chul Roh, Mohamed F. Mansour, Srinath Hosur
  • Publication number: 20200007376
    Abstract: A method of operating a wireless communication system is disclosed. The method includes receiving first and second parallel data streams. The first data stream is converted to a first frequency-domain data stream by a discrete Fourier transform (DFT) having NDFT0 size, where NDFT0 is a positive integer. The second data stream is converted to a second frequency-domain data stream by a DFT having NDFT1 size, where NDFT1 is a positive integer. The first and second frequency-domain data streams are mapped to respective subcarriers.
    Type: Application
    Filed: September 4, 2019
    Publication date: January 2, 2020
    Inventors: JUNE CHUL ROH, PIERRE BERTRAND, JUN YAO