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    Methods and Apparatus for Velocity Detection in MIMO Radar Including Velocity Ambiguity Resolution
    31.
    发明申请
    Methods and Apparatus for Velocity Detection in MIMO Radar Including Velocity Ambiguity Resolution 审中-公开

    公开(公告)号：US20200209352A1

    公开(公告)日：2020-07-02

    申请号：US16814531

    申请日：2020-03-10

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Karthik Subburaj ,  Dan Wang ,  Adeel Ahmad

    IPC: G01S7/35 ,  G01S13/42 ,  G01S13/92 ,  G01S13/34

    Abstract: In accordance with described examples, a method determines if a velocity of an object detected by a radar is greater than a maximum velocity by receiving on a plurality of receivers at least one frame of chirps transmitted by at least two transmitters and reflected off of the object. A velocity induced phase shift (φd) in a virtual array vector S of signals received by each receiver corresponding to a sequence of chirps (frame) transmitted by each transmitter is estimated. Phases of each element of virtual array vector S are corrected using φd to generate a corrected virtual array vector Sc. A first Fourier transform is performed on the corrected virtual array vector Sc to generate a corrected virtual array spectrum to detect a signature that indicates that the object has an absolute velocity greater than a maximum velocity.

    GNSS RECEIVER CLOCK FREQUENCY DRIFT DETECTION
    32.
    发明申请
    GNSS RECEIVER CLOCK FREQUENCY DRIFT DETECTION 审中-公开

    公开(公告)号：US20190293804A1

    公开(公告)日：2019-09-26

    申请号：US15935071

    申请日：2018-03-26

    Applicant: Texas Instruments Incorporated

    Inventor： Sashidharan Venkatraman ,  Sandeep Rao

    IPC: G01S19/23

    Abstract: The disclosure provides a GNSS receiver. The GNSS receiver a measurement engine that generates a set of doppler measurements and a set of pseudo ranges in response to an input signal. A clock frequency drift estimation (CFDE) block receives the set of doppler measurements, and generates an averaged delta doppler. A position estimation engine estimates a position and velocity of a user based on the set of doppler measurements, the set of pseudo ranges and the averaged delta doppler.

    Radar hardware accelerator
    33.
    发明授权
    Radar hardware accelerator 有权

    公开(公告)号：US10330773B2

    公开(公告)日：2019-06-25

    申请号：US15184715

    申请日：2016-06-16

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Karthik Ramasubramanian ,  Indu Prathapan ,  Raghu Ganesan ,  Pankaj Gupta

    IPC: G01S7/02 ,  G01S13/34 ,  H04B15/02 ,  H04L27/10 ,  G01S7/35

    Abstract: A radar hardware accelerator (HWA) includes a fast Fourier transform (FFT) engine including a pre-processing block for providing interference mitigation and/or multiplying a radar data sample stream received from ADC buffers within a split accelerator local memory that also includes output buffers by a pre-programmed complex scalar or a specified sample from an internal look-up table (LUT) to generate pre-processed samples. A windowing plus FFT block (windowed FFT block) is for multiply the pre-processed samples by a window vector and then processing by an FFT block for performing a FFT to generate Fourier transformed samples. A post-processing block is for computing a magnitude of the Fourier transformed samples and performing a data compression operation for generating post-processed radar data. The pre-processing block, windowed FFT block and post-processing block are connected in one streaming series data path.

    System and method for navigation by applying corrected bias values to gyroscopic data
    35.
    发明授权
    System and method for navigation by applying corrected bias values to gyroscopic data 有权

    公开(公告)号：US10240931B2

    公开(公告)日：2019-03-26

    申请号：US15593476

    申请日：2017-05-12

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Deric Wayne Waters

    IPC: G01C21/18 ,  G01C19/42 ,  G01C17/38 ,  G01C21/06 ,  G01C21/00 ,  G01C21/26 ,  G01C21/16

    Abstract: A disclosed method includes computing, for each of a plurality of values of at least one type of error parameter, a distance traveled for each of a plurality of directions of travel. The method includes selecting, from the plurality of values of the at least one type of error parameter, a value that provides a greatest distance traveled for any of the plurality of directions of travel relative to the unselected ones of the plurality of values. The method further includes applying the selected value of the at least one type of error parameter to gyroscopic sensor data, and then determining navigation information based on the gyroscopic sensor data with the selected value of the at least one type of error parameter applied.

    TECHNIQUES FOR HIGH ARRIVAL ANGLE RESOLUTION USING MULTIPLE NANO-RADARS
    38.
    发明申请
    TECHNIQUES FOR HIGH ARRIVAL ANGLE RESOLUTION USING MULTIPLE NANO-RADARS 有权
    使用多纳米雷达的高角度角度分辨率的技术

    公开(公告)号：US20160146931A1

    公开(公告)日：2016-05-26

    申请号：US14550774

    申请日：2014-11-21

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Karthik Ramasubramanian ,  Brian Ginsburg ,  Jawaharlal Tangudu ,  Karthik Subbaraj

    IPC: G01S13/02 ,  G01S7/02

    CPC classification number: G01S7/032 ,  G01S13/343 ,  G01S13/931 ,  H01Q1/3233

    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.

    Abstract translation: 一种装置包括其上具有控制部件，第一雷达芯片和第二雷达芯片的电路板。 第一雷达芯片包括第一雷达发射天线，第二雷达发射天线和第一雷达接收机天线阵列。 第二雷达芯片包括第二雷达接收机天线阵列。 控制部件可以控制第一雷达芯片和第二雷达芯片。 第一雷达发射天线可以传输第一雷达传输信号。 第二雷达发射天线可以发射第二雷达传输信号。 第二雷达芯片与第一雷达芯片间隔开，以在第一雷达接收机天线阵列和第二雷达接收机天线阵列之间创建虚拟接收机天线阵列。

    On-field phase calibration
    40.
    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.

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