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公开(公告)号：US11630185B2
公开(公告)日：2023-04-18
申请号：US17097390
申请日：2020-11-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Karthik Subburaj , Vashishth Dudhia , Shailesh Joshi
IPC: G01S7/40
Abstract: A method for calibrating a cascaded radar system includes transmitting first radar transmission signal from a radar device. First radar reflection signals corresponding to the respective first radar transmission signal reflected from calibration target are received at each of the radar devices. The first radar reflection signals are demodulated to generate first baseband signals at each of the radar devices. A second radar transmission signal is modulated with respect to the first radar transmission signal at the respective one of the radar devices. The second radar transmission signal is transmitted from the respective one of the radar devices and are received as second radar reflection signals at each of the radar devices. The second radar reflection signals are demodulated to generate second baseband signals at each of the radar devices, and each of the radar devices are calibrated based on the first and second baseband signals.
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公开(公告)号：US11513190B2
公开(公告)日：2022-11-29
申请号：US16428576
申请日：2019-05-31
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Zahir Ibrahim Parkar , Krishnanshu Dandu , Vashishth Dudhia
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.
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Patent Agency Ranking
公开(公告)号：US20230305132A1
公开(公告)日：2023-09-28
申请号：US17948227
申请日：2022-09-20
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Kameswaran Vengattaramane , Shankar Ram Narayana Moorthy , Vashishth Dudhia
CPC classification number: G01S13/38 , G01S7/356 , G01S7/4008
Abstract: In described examples, a frequency modulated continuous wave (FMCW) radar system includes an FMCW signal generator, a number N transmitters, N phase shifters, multiple receivers, and a processor. The FMCW signal generator is configured to generate FMCW chirps. Different ones of the phase shifters have different respective base phase shifts selected in response to N. The transmitter is configured to transmit the phase shifted FMCW chirps. The receivers are configured to receive an FMCW chirp reflected by an object in range of the FMCW radar system. The processor is configured to determine a location of the object in range in response to the received FMCW chirp.
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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
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.
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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
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.
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公开(公告)号：US12078749B2
公开(公告)日：2024-09-03
申请号：US18181938
申请日：2023-03-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Karthik Subburaj , Vashishth Dudhia , Shailesh Joshi
CPC classification number: G01S7/40 , G01S7/352 , G01S7/4021 , G01S7/4073 , G01S13/341 , G01S7/4017
Abstract: An example radar device includes an antenna system, a transmitter having an input, and an output coupled to an input of the antenna system, the transmitter having modulation circuitry to provide frequency modulated continuous wave (FMCW) signals for transmission by the antenna system; a receive signal processing chain; and a digital front-end. The receive signal processing chain includes an input coupled to an output of the antenna system, and is configured to receive radar reflection signals, process the radar reflected signals to generate an intermediate frequency (IF) baseband signal, and digitize the IF baseband signal to generate digital samples of the IF baseband signal. The digital front-end has an input to receive the digital samples of the IF baseband signal and to phase-shift the digital samples in response to a calibration signal.
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公开(公告)号：US11899129B2
公开(公告)日：2024-02-13
申请号：US17989401
申请日：2022-11-17
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Zahir Ibrahim Parkar , Krishnanshu Dandu , Vashishth Dudhia
CPC classification number: G01S7/4056 , G01S7/352 , G01S13/34 , G01S7/356
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.
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