中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

113 records (took 0.02 seconds)

    On-field phase calibration
    61.
    发明授权
    On-field phase calibration 有权

    公开(公告)号：US12235347B2

    公开(公告)日：2025-02-25

    申请号：US18502445

    申请日：2023-11-06

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sandeep Rao ,  Karthik Subburaj

    IPC: G01S13/58 ,  G01S7/40

    Abstract: A radar transceiver includes a phase shifter that is controlled to apply an induced phase shift in a first subset of chirp signals of a frame of chirp signals, which also includes a second subset of chirp signals in which no phase shift is applied. Other circuitry generates digital signals based on received reflected signals, which are based on transmitted signals. Processing circuitry performs a Fast Fourier Transform (FFT) on a first subset of digital signals, corresponding to the first subset of chirp signals, to generate a first range-Doppler array, and performs a FFT on the second subset of digital signals, corresponding to the second subset of chirp signals, to generate a second range-Doppler array; identifies peaks in the first and second range-Doppler arrays to detect an object; and compares a phases of peaks at corresponding positions in the first and second range-Doppler arrays to determine a measured phase shift between the two peaks.

    Non-active chirp dithering in FMCW radar
    63.
    发明授权
    Non-active chirp dithering in FMCW radar 有权

    公开(公告)号：US11874392B2

    公开(公告)日：2024-01-16

    申请号：US17498342

    申请日：2021-10-11

    Applicant: Texas Instruments Incorporated

    Inventor： Shankar Ram Narayana Moorthy ,  Karthik Subburaj ,  Shailesh Joshi ,  Piyush Soni

    IPC: G01S7/28 ,  G01S7/35

    CPC classification number: G01S7/2813 ,  G01S7/352

    Abstract: A non-transitory computer-readable storage device stores machine instructions which, when executed by a processor, cause the processor to determine a chirp period Tc for radar chirps in a radar frame. The chirp period Tc comprises a rising period Trise and a falling period Tfall. The processor determines, for each radar chirp in the radar frame, a corresponding randomized frequency characteristic during Tfall, and causes a radar sensor circuit to generate the radar chirps in the radar frame based on Tc, Trise, Tfall, and the corresponding randomized frequency characteristics. In some implementations, the machine instructions to determine the corresponding randomized frequency characteristic comprise machine instructions to determine a frequency step having a frequency f_step and a period Tstep. At least one of the frequency f_step and the period Tstep is dithered across radar chirps in the radar frame.

    METHODS AND APPARATUS TO TEST RADAR INTEGRATED CIRCUITS
    65.
    发明申请
    METHODS AND APPARATUS TO TEST RADAR INTEGRATED CIRCUITS 有权

    公开(公告)号：US20230088361A1

    公开(公告)日：2023-03-23

    申请号：US17989401

    申请日：2022-11-17

    Applicant: Texas Instruments Incorporated

    Inventor： Karthik Subburaj ,  Zahir Ibrahim Parkar ,  Krishnanshu Dandu ,  Vashishth Dudhia

    IPC: G01S7/40 ,  G01S13/34 ,  G01S7/35

    Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to test RADAR integrated circuits. A radar circuit comprising a local oscillator (LO), a transmitter coupled to the LO and configured to be coupled to a transmission network, a receiver configured to be coupled to the transmission network, and a controller coupled to the LO, the transmitter, and the receiver, the controller to cause the LO to generate a frequency modulated continuous waveform (FMCW), cause the transmitter to modulate the FMCW as a modulated FMCW, cause the transmitter to transmit the modulated FMCW via the transmission network and the receiver to obtain a received FMCW from the transmission network, and in response to obtaining the received FMCW from the receiver, generate a performance characteristic of the radar circuit based on the received FMCW.

    Digital compensation for mismatches in a radar system
    68.
    发明授权
    Digital compensation for mismatches in a radar system 有权

    公开(公告)号：US11054499B2

    公开(公告)日：2021-07-06

    申请号：US15004443

    申请日：2016-01-22

    Applicant: Texas Instruments Incorporated

    Inventor： Sriram Murali ,  Karthik Subburaj ,  Karthik Ramasubramanian

    IPC: G01S7/35 ,  G01S7/40 ,  G01S13/931

    Abstract: A radar system is provided that includes a receive channel configured to receive a reflected signal and to generate a first digital intermediate frequency (IF) signal based on the reflected signal, a reference receive channel configured to receive a reflected signal and to generate a second digital IF signal based on the reflected signal, and digital mismatch compensation circuitry coupled to receive the first digital IF signal and the second digital IF signal, the digital mismatch compensation circuitry configured to process the first digital IF signal and the second digital IF signal to compensate for mismatches between the receive channel and the reference receive channel.

    METHODS AND APPARATUS TO TEST RADAR INTEGRATED CIRCUITS
    69.
    发明申请
    METHODS AND APPARATUS TO TEST RADAR INTEGRATED CIRCUITS 审中-公开

    公开(公告)号：US20200379085A1

    公开(公告)日：2020-12-03

    申请号：US16428576

    申请日：2019-05-31

    Applicant: Texas Instruments Incorporated

    Inventor： Karthik Subburaj ,  Zahir Ibrahim Parkar ,  Krishnanshu Dandu ,  Vashishth Dudhia

    IPC: G01S7/40 ,  G01S7/35 ,  G01S13/34

    Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to test RADAR integrated circuits. A radar circuit comprising a local oscillator (LO), a transmitter coupled to the LO and configured to be coupled to a transmission network, a receiver configured to be coupled to the transmission network, and a controller coupled to the LO, the transmitter, and the receiver, the controller to cause the LO to generate a frequency modulated continuous waveform (FMCW), cause the transmitter to modulate the FMCW as a modulated FMCW, cause the transmitter to transmit the modulated FMCW via the transmission network and the receiver to obtain a received FMCW from the transmission network, and in response to obtaining the received FMCW from the receiver, generate a performance characteristic of the radar circuit based on the received FMCW.

Patent Agency Ranking