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公开(公告)号：US11460543B2
公开(公告)日：2022-10-04
申请号：US16836836
申请日：2020-03-31
Applicant: Texas Instruments Incorporated
Inventor： Karthik Ramasubramanian , Karthik Subburaj , Jasbir Singh Nayyar
IPC: G01S7/35 , G01S7/40 , G01S13/931 , G01S13/34
Abstract: A radar system is provided that includes a receive channel including a complex baseband and a processor coupled to the receive channel to receive a first plurality of digital intermediate frequency (IF) samples from an in-band (I) channel of the complex baseband and a corresponding second plurality of digital IF samples from a quadrature (Q) channel of the complex baseband, wherein the processor is configured to execute instructions to compute at least one failure metric based on the first plurality of digital IF samples and the second plurality of digital IF samples.
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公开(公告)号：US20220196824A1
公开(公告)日：2022-06-23
申请号：US17132857
申请日：2020-12-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sandeep Rao , Karthik Subburaj
Abstract: A radar system is provided and includes a radar transceiver integrated circuit (IC) and a processor coupled to the radar transceiver IC. The radar transceiver IC includes a chirp generator configured to generate a plurality of chirp signals and a phase shifter configured to induce a signal phase shift. The radar transceiver IC is configured to transmit a frame of chirps based on the plurality of chirp signals and generate a plurality of digital signals, each digital signal corresponding to a respective reflection received based on the plurality of chirp signals. The processor is configured to control the phase shifter to induce the signal phase shift in a first subset of chirp signals of the plurality of chirp signals and determine a phase shift induced in the first subset of chirp signals by the phase shifter based on the digital signal.
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公开(公告)号：US11137476B2
公开(公告)日：2021-10-05
申请号：US16120129
申请日：2018-08-31
Applicant: Texas Instruments Incorporated
Inventor： Brian Paul Ginsburg , Karthik Subburaj , Karthik Ramasubramanian , Sachin Bhardwaj , Sriram Murali , Sandeep Rao
IPC: G01S7/35 , G01S7/02 , G01S7/40 , G01S13/32 , G01S13/931
Abstract: A frequency modulated continuous wave (FMCW) radar system is provided that includes a receiver configured to generate a digital intermediate frequency (IF) signal, and an interference monitoring component coupled to the receiver to receive the digital IF signal, in which the interference monitoring component is configured to monitor at least one sub-band in the digital IF signal for interference, in which the at least one sub-band does not include a radar signal.
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公开(公告)号：US20210026005A1
公开(公告)日：2021-01-28
申请号：US17068976
申请日：2020-10-13
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Karthik Subburaj , Sriram Murali
Abstract: A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.
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公开(公告)号：US10809353B2
公开(公告)日：2020-10-20
申请号：US16114490
申请日：2018-08-28
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Karthik Ramasubramanian , Sriram Murali , Sreekiran Samala , Krishnanshu Dandu
IPC: G01S13/00 , G01S7/292 , G01S13/88 , G01S7/35 , G01S13/34 , G01S7/03 , G01S7/02 , G01S7/41 , G01S13/04
Abstract: A noise-mitigated continuous-wave frequency-modulated radar includes, for example, a transmitter for generating a radar signal, a receiver for receiving a reflected radar signal and comprising a mixer for generating a baseband signal in response to the received radar signal and in response to a local oscillator (LO) signal, and a signal shifter coupled to at least one of the transmitter, LO input of the mixer in the receiver and the baseband signal generated by the mixer. The impact of amplitude noise or phase noise associated with interferers, namely, for example, strong reflections from nearby objects, and electromagnetic coupling from transmit antenna to receive antenna, on the detection of other surrounding objects is reduced by configuring the signal shifter in response to an interferer frequency and phase offset.
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Patent Agency Ranking
公开(公告)号：US10775489B2
公开(公告)日：2020-09-15
申请号：US15665663
申请日：2017-08-01
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Subburaj , Sriram Murali , Karthik Ramasubramanian
IPC: G01S13/28 , G06F17/14 , G01S7/41 , G01S13/536 , G01S13/931 , G01S13/34 , G01S7/35 , G06F17/13 , H04N5/232
Abstract: A radar system is provided that includes a radar transceiver integrated circuit (IC) configurable to transmit a first frame of chirps, and another radar transceiver IC configurable to transmit a second frame of chirps at a time delay ΔT, wherein ΔT=Tc/K, K≥2 and Tc is an elapsed time from a start of one chirp in the first frame and the second frame and a start of a next chirp in the first frame and the second frame, wherein the radar system is configured to determine a velocity of an object in a field of view of the radar system based on first digital intermediate frequency signals generated responsive to receiving reflected chirps of the first frame and second digital IF signals generated responsive to receiving reflected chirps of the time delayed second frame, wherein the maximum measurable velocity is increased by a factor of K.
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公开(公告)号：US20200225318A1
公开(公告)日：2020-07-16
申请号：US16836836
申请日：2020-03-31
Applicant: Texas Instruments Incorporated
Inventor： Karthik Ramasubramanian , Karthik Subburaj , Jasbir Singh Nayyar
IPC: G01S7/40 , G01S13/931 , G01S7/35
Abstract: A radar system is provided that includes a receive channel including a complex baseband and a processor coupled to the receive channel to receive a first plurality of digital intermediate frequency (IF) samples from an in-band (I) channel of the complex baseband and a corresponding second plurality of digital IF samples from a quadrature (Q) channel of the complex baseband, wherein the processor is configured to execute instructions to compute at least one failure metric based on the first plurality of digital IF samples and the second plurality of digital IF samples.
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公开(公告)号：US10659078B2
公开(公告)日：2020-05-19
申请号：US16200061
申请日：2018-11-26
Applicant: Texas Instruments Incorporated
Inventor： Jasbir Singh Nayyar , Brian Ginsburg , Karthik Subburaj
Abstract: A integrated circuit (IC) chip can include a root timer that generates a frame pulse based on a start trigger signal. The IC chip can also include a hardware clock control that provides a clock signal based on a selected one of the frame pulse and the synchronization signal provided from one of the root timer and another IC chip. The IC chip can further include a plurality of analog to digital converters (ADCs). Each of the plurality of ADCs being configured to sample an output of a respective one of a plurality of radio frequency (RF) receivers based on the clock signal.
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公开(公告)号：US10649069B2
公开(公告)日：2020-05-12
申请号：US15635659
申请日：2017-06-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Karthik Ramasubramanian , Karthik Subburaj , Sachin Bhardwaj
Abstract: The disclosure provides a radar apparatus for estimating a position and a velocity of the plurality of obstacles. The radar apparatus includes a local oscillator that generates a first signal. A first transmit unit receives the first signal from the local oscillator and generates a first transmit signal. A frequency shifter receives the first signal from the local oscillator and generates a second signal. A second transmit unit receives the second signal and generates a second transmit signal. The frequency shifter provides a frequency offset to the first signal based on a routing delay mismatch to generate the second signal such that the first transmit signal is phase coherent with the second transmit signal.
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公开(公告)号：US10598767B2
公开(公告)日：2020-03-24
申请号：US16253790
申请日：2019-01-22
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Brian Paul Ginsburg , Daniel Colum Breen , Sandeep Rao , Karthik Ramasubramanian
Abstract: Methods for monitoring of performance parameters of one or more receive channels and/or one or more transmit channels of a radar system-on-a-chip (SOC) are provided. The radar SOC may include a loopback path coupling at least one transmit channel to at least one receive channel to provide a test signal from the at least one transmit channel to the at least one receive channel when the radar SOC is operated in test mode. In some embodiments, the loopback path includes a combiner coupled to each of one or more transmit channels, a splitter coupled to each of one or more receive channels, and a single wire coupling an output of the combiner to an input of the splitter.
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