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公开(公告)号：US12196847B2
公开(公告)日：2025-01-14
申请号：US16121689
申请日：2018-09-05
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Subburaj , Brian Ginsburg , Karthik Ramasubramanian , Jawaharlal Tangudu , Sachin Bharadwaj
IPC: G01S13/58 , G01S7/35 , G01S13/34 , G01S13/931
Abstract: The disclosure provides a radar apparatus for estimating a range of an obstacle. The radar apparatus includes a local oscillator that generates a first ramp segment and a second ramp segment. The first ramp segment and the second ramp segment each includes a start frequency, a first frequency and a second frequency. The first frequency of the second ramp segment is equal to or greater than the second frequency of the first ramp segment when a slope of the first ramp segment and a slope of the second ramp segment are equal and positive. The first frequency of the second ramp segment is equal to or less than the second frequency of the first ramp segment when the slope of the first ramp segment and the slope of the second ramp segment are equal and negative.
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公开(公告)号：US10816655B2
公开(公告)日：2020-10-27
申请号：US15638106
申请日：2017-06-29
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Karthik Subburaj , Sriram Murali
IPC: G01S13/44 , G06K9/52 , G01S7/40 , G01S13/90 , G06K9/32 , G01S13/30 , G01S7/35 , G01S13/02 , G01S7/41 , G01S13/00
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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3.发明授权公开(公告)号：US12092721B2
公开(公告)日：2024-09-17
申请号：US17330477
申请日：2021-05-26
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Sriram Murali
IPC: G01S13/42 , G01S13/34 , G01S13/58 , G01S13/931 , G01S7/288
CPC classification number: G01S13/42 , G01S13/343 , G01S13/931 , G01S7/288 , G01S7/2883 , G01S13/583
Abstract: A multi-mode radar system, radar signal processing methods and configuration methods, including using predetermined, range/mode-specific pushing windows to perform windowing on range and velocity object data before performing an FFT on the windowed object data matrix to generate a three-dimensional object matrix including range, velocity and angle data. The individual windows have an angular spectral response that corresponds to a combined angular coverage field of view of the transmit and receive antennas for the corresponding mode to minimize the total weighted energy outside the main lobe and to provide increasing spectral leakage outside the combined angular coverage field of view with angular offset from the main lobe to push out much of the spectral leakage into regions where leakage tolerance is high due to the corresponding combined angular coverage field of view of the transmit and receive antennas.
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公开(公告)号：US20190087009A1
公开(公告)日：2019-03-21
申请号：US15952453
申请日：2018-04-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sandeep Rao , Sachin Bharadwaj , Piyali Goswami
Abstract: A method for gesture recognition includes receiving, by a processor, a first digital intermediate frequency (IF) signal stream from a first receive antenna and receiving, by the processor, a second digital IF signal stream from a second receive antenna. The method also includes computing, by the processor, a weighted Doppler metric stream based on the first digital IF signal stream and the second digital IF signal stream and computing, by the processor, an angle metric stream based on the first digital IF signal stream and the second digital IF signal stream. Additionally, the method includes computing, by the processor, a correlation between the weighted Doppler metric stream and the angle metric stream, to generate a first correlation and recognizing, by the processor, a gesture, based on the first correlation.
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公开(公告)号：US10048354B2
公开(公告)日：2018-08-14
申请号：US14826045
申请日：2015-08-13
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Karthik Subburaj
Abstract: The disclosure provides a radar apparatus. The radar apparatus includes a transmit unit that generates a first signal in response to a reference clock and a feedback clock. The first signal is scattered by one or more obstacles to generate a second signal. A receive unit receives the second signal and generates N samples corresponding to the second signal. N is an integer. A conditioning circuit is coupled to the transmit unit and the receive unit. The conditioning circuit receives the N samples corresponding to the second signal, and generates N new samples using an error between the feedback clock and the reference clock.
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Patent Agency Ranking
公开(公告)号：US20170045607A1
公开(公告)日：2017-02-16
申请号：US14826045
申请日：2015-08-13
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Karthik Subburaj
CPC classification number: G01S7/35 , G01S7/4008 , G01S13/343 , G01S13/583 , G01S13/584 , H03L7/06 , H03L7/0805 , H03L7/12
Abstract: The disclosure provides a radar apparatus. The radar apparatus includes a transmit unit that generates a first signal in response to a reference clock and a feedback clock. The first signal is scattered by one or more obstacles to generate a second signal. A receive unit receives the second signal and generates N samples corresponding to the second signal. N is an integer. A conditioning circuit is coupled to the transmit unit and the receive unit. The conditioning circuit receives the N samples corresponding to the second signal, and generates N new samples using an error between the feedback clock and the reference clock.
Abstract translation: 本公开提供了一种雷达装置。 雷达装置包括响应于参考时钟和反馈时钟产生第一信号的发射单元。 第一信号被一个或多个障碍物分散以产生第二信号。 接收单元接收第二信号并产生对应于第二信号的N个采样。 N是整数。 调理电路耦合到发送单元和接收单元。 调理电路接收对应于第二信号的N个采样，并且使用反馈时钟和参考时钟之间的误差来生成N个新采样。
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公开(公告)号：US12153161B2
公开(公告)日：2024-11-26
申请号：US17307044
申请日：2021-05-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Piyali Goswami , Sandeep Rao , Sachin Bharadwaj
IPC: G01S7/40 , G01S7/35 , G01S7/41 , G01S13/536 , G01S13/56
Abstract: A method of operating a frequency modulated continuous wave (FMCW) radar system includes receiving, by at least one processor, digital intermediate frequency (IF) signals from a mixer coupled to a receive antenna. The method also includes computing, by the at least one processor, a motion metric based on the digital IF signals; operating, by the at least one processor, the FMCW radar system in a classification mode, in response to determining that the motion metric is above a threshold; and operating, by the at least one processor, the FMCW radar system in a detection mode, in response to determining that the motion metric is below the threshold for at least a first amount of time. An amount of power consumed by the FMCW radar system in the detection mode is less than an amount of power consumed by the FMCW radar system in the classification mode.
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公开(公告)号：US11662455B2
公开(公告)日：2023-05-30
申请号：US17183406
申请日：2021-02-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sachin Bharadwaj , Sandeep Rao
CPC classification number: G01S13/583 , G01S7/021 , G01S7/4056 , G01S13/343
Abstract: A radar data processing device includes at least one analog-to-digital converter (ADC) configured to digitize a plurality of input signals, wherein each input signal includes radar chirp and radar chirp reflection information received at one of a plurality of receiver antennas. The radar data processing device also includes Fast Fourier Transform (FFT) logic configured to generate FFT output samples based on each digitized input signal, wherein at least some of the generated FFT output samples are across antenna FFT output samples associated with at least two of the plurality of receiver antennas. The radar data processing device also includes a processor configured to determine a plurality of object parameters based on at least some of the generated FFT output samples, wherein the processor uses a neural network classifier trained to provide a confidence metric for at least one of the plurality of object parameters.
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9.发明申请公开(公告)号：US20180321368A1
公开(公告)日：2018-11-08
申请号：US15587564
申请日：2017-05-05
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Sriram Murali
CPC classification number: G01S13/42 , G01S7/288 , G01S13/583 , G01S2007/2883
Abstract: A multi-mode radar system, radar signal processing methods and configuration methods, including using predetermined, range/mode-specific pushing windows to perform windowing on range and velocity object data before performing an FFT on the windowed object data matrix to generate a three-dimensional object matrix including range, velocity and angle data. The individual windows have an angular spectral response that corresponds to a combined angular coverage field of view of the transmit and receive antennas for the corresponding mode to minimize the total weighted energy outside the main lobe and to provide increasing spectral leakage outside the combined angular coverage field of view with angular offset from the main lobe to push out much of the spectral leakage into regions where leakage tolerance is high due to the corresponding combined angular coverage field of view of the transmit and receive antennas.
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公开(公告)号：US10094920B2
公开(公告)日：2018-10-09
申请号：US14470414
申请日：2014-08-27
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Subburaj , Brian Ginsburg , Karthik Ramasubramanian , Jawaharlal Tangudu , Sachin Bharadwaj
Abstract: The disclosure provides a radar apparatus for estimating a range of an obstacle. The radar apparatus includes a local oscillator that generates a first ramp segment and a second ramp segment. The first ramp segment and the second ramp segment each includes a start frequency, a first frequency and a second frequency. The first frequency of the second ramp segment is equal to or greater than the second frequency of the first ramp segment when a slope of the first ramp segment and a slope of the second ramp segment are equal and positive. The first frequency of the second ramp segment is equal to or less than the second frequency of the first ramp segment when the slope of the first ramp segment and the slope of the second ramp segment are equal and negative.
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