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    Linear, synthesized radar receiver array between and extending from ICS
    101.
    发明授权
    Linear, synthesized radar receiver array between and extending from ICS 有权

    公开(公告)号：US10782389B2

    公开(公告)日：2020-09-22

    申请号：US15676547

    申请日：2017-08-14

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sandeep Rao ,  Karthik Ramasubramanian ,  Brian Ginsburg ,  Jawaharial Tangudu ,  Karthik Subburaj

    IPC: G01S7/03 ,  G01S13/34 ,  G01S13/931 ,  H01Q1/32

    Abstract: A device includes a circuit board having thereon, a controlling component, a first radar chip and a second radar chip. The first radar chip includes a first radar transmission antenna, a second radar transmission antenna and a first radar receiver antenna array. The second radar chip includes a second radar receiver antenna array. The controlling component can control the first radar chip and the second radar chip. The first radar transmission antenna can transmit a first radar transmission signal. The second radar transmission antenna can transmit a second radar transmission signal. The second radar chip is spaced from the first radar chip so as to create a virtual receiver antenna array between the first radar receiver antenna array and the second radar receiver antenna array.

    TECHNIQUES FOR ANGLE RESOLUTION IN RADAR
    102.
    发明申请
    TECHNIQUES FOR ANGLE RESOLUTION IN RADAR 审中-公开

    公开(公告)号：US20200264270A1

    公开(公告)日：2020-08-20

    申请号：US16857242

    申请日：2020-04-24

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Saurabh Khanna

    IPC: G01S7/03 ,  H01Q21/08 ,  H01Q3/24 ,  H01Q1/32 ,  H01Q3/26 ,  G01S13/931 ,  G01S13/42 ,  G01S13/34 ,  G01S7/35

    Abstract: A radar apparatus for estimating position of a plurality of obstacles. The radar apparatus includes a receive antenna unit. The receive antenna unit includes a linear array of antennas and an additional antenna at a predefined offset from at least one antenna in the linear array of antennas. The radar apparatus also includes a signal processing unit. The signal processing unit estimates an azimuth frequency associated with each obstacle of the plurality of obstacles from a signal received from the plurality of obstacles at the linear array of antennas. In addition, the signal processing unit estimates an azimuth angle and an elevation angle associated with each obstacle from the estimated azimuth frequency associated with each obstacle.

    Techniques for angle resolution in radar
    103.
    发明授权
    Techniques for angle resolution in radar 有权

    公开(公告)号：US10677890B2

    公开(公告)日：2020-06-09

    申请号：US15702561

    申请日：2017-09-12

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Saurabh Khanna

    IPC: G01S7/03 ,  G01S7/35 ,  G01S13/34 ,  G01S13/42 ,  G01S13/931 ,  H01Q3/26 ,  H01Q1/32 ,  H01Q3/24 ,  H01Q21/08

    Abstract: A radar apparatus for estimating position of a plurality of obstacles. The radar apparatus includes a receive antenna unit. The receive antenna unit includes a linear array of antennas and an additional antenna at a predefined offset from at least one antenna in the linear array of antennas. The radar apparatus also includes a signal processing unit. The signal processing unit estimates an azimuth frequency associated with each obstacle of the plurality of obstacles from a signal received from the plurality of obstacles at the linear array of antennas. In addition, the signal processing unit estimates an azimuth angle and an elevation angle associated with each obstacle from the estimated azimuth frequency associated with each obstacle.

    LOW POWER MODE OF OPERATION FOR MM-WAVE RADAR
    104.
    发明申请
    LOW POWER MODE OF OPERATION FOR MM-WAVE RADAR 审中-公开

    公开(公告)号：US20190044485A1

    公开(公告)日：2019-02-07

    申请号：US15669229

    申请日：2017-08-04

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Brian Ginsburg

    IPC: H03F3/217 ,  H03B5/12 ,  H01Q1/22 ,  H01Q3/26 ,  H03F3/24 ,  H03F3/45

    Abstract: Disclosed examples include a radar system that operates in a first mode and a second mode. In the first mode, the system detects the presence of an object within a threshold range. In response to detection of the presence of the object, the system transitions to the second mode, and the system generates range data, velocity data, and angle data of the object in the second mode. When the object is no longer detected within the threshold range, the system transitions back to the first mode.

    Method and Apparatus for FMCW Radar Processing
    105.
    发明申请
    Method and Apparatus for FMCW Radar Processing 审中-公开

    公开(公告)号：US20180372840A1

    公开(公告)日：2018-12-27

    申请号：US16107000

    申请日：2018-08-21

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sandeep Rao ,  Karthik Ramasubramanian

    IPC: G01S7/35 ,  G01S13/89 ,  G01S13/42 ,  G01S13/93 ,  G01S13/58

    Abstract: The disclosure provides a radar apparatus. The radar apparatus includes a transmitter that transmits a first chirp. The first chirp is scattered by one or more obstacles to generate a first plurality of scattered signals. A plurality of receivers receives the first plurality of scattered signals. Each receiver of the plurality of receivers generates a digital signal in response to a scattered signal of the first plurality of scattered signals. A processor is coupled to the plurality of receivers and receives the digital signals from the plurality of receivers. The processor performs range FFT (fast fourier transform) and angle FFT on the digital signals received from the plurality of receivers to generate a first matrix of complex samples.

    ANTENNA CONFIGURATION FOR PARKING ASSIST RADAR
    108.
    发明申请
    ANTENNA CONFIGURATION FOR PARKING ASSIST RADAR 审中-公开

    公开(公告)号：US20170322296A1

    公开(公告)日：2017-11-09

    申请号：US15661891

    申请日：2017-07-27

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sandeep Rao

    IPC: G01S13/06 ,  G01S13/93 ,  H01Q3/26 ,  H01Q25/00 ,  G01S13/42 ,  G01S7/35

    Abstract: A method of estimating position of an obstacle of a plurality of obstacles with a radar apparatus. An azimuth frequency, an elevation frequency and a range of the obstacle are estimated to generate an estimated azimuth frequency, an estimated elevation frequency and an estimated range of the obstacle. A metric is estimated from one or more of the estimated azimuth frequency, the estimated elevation frequency and the estimated range of the obstacle. The metric is compared to a threshold to detect an error in at least one of the estimated azimuth frequency and the estimated elevation frequency. On error detection, a sign of at least one of the estimated azimuth frequency and the estimated elevation frequency is inverted to generate a true estimated azimuth frequency and a true estimated elevation frequency respectively.

    Measurement error covariance in GNSS receiver circuitry, pseudoranges, reference position
    110.
    发明授权
    Measurement error covariance in GNSS receiver circuitry, pseudoranges, reference position 有权
    GNSS接收机电路，伪距，参考位置的测量误差协方差

    公开(公告)号：US09513374B2

    公开(公告)日：2016-12-06

    申请号：US13710154

    申请日：2012-12-10

    Applicant: Texas Instruments Incorporated

    Inventor： Atul Deshpande ,  Sthanunathan Ramakrishnan ,  Sandeep Rao

    IPC: G01S19/40 ,  G01S19/22 ,  G01S19/49 ,  G01S5/02

    CPC classification number: G01S19/40 ,  G01S5/0294 ,  G01S19/22 ,  G01S19/49

    Abstract: A Global Navigation Satellite System (GNSS) receiver determines a measurement error covariance from a reference position and a set of measured pseudoranges from a set of GNSS satellites. The position and velocity solution is determined from the measurement error covariance and the set of measured pseudoranges. The measurement error covariance is determined as function of the difference between a reference pseudorange and measured pseudorange. The reference pseudorange is computed from the reference position to a satellite. The measurement error covariance is determined as function of the difference only if the measured pseudorange is greater than the reference pseudorange. The GNSS receiver also determines measurement error covariance as function of one or more of correlation peak shape, difference, the correlation peak shape, a received signal to noise ratio and a tracking loop error.

    Abstract translation: 全球导航卫星系统（GNSS）接收机从一组GNSS卫星确定来自参考位置和一组测量伪距的测量误差协方差。 位置和速度解是从测量误差协方差和测量伪距的集合确定的。 测量误差协方差被确定为参考伪距和测量伪距之间的差的函数。 从参考位置到卫星计算参考伪距。 仅当所测量的伪距大于参考伪距时，测量误差协方差才被确定为差值的函数。 GNSS接收机还将测量误差协方差确定为相关峰形，差，相关峰形，接收信噪比和跟踪循环误差中的一个或多个的函数。

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