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    CALIBRATION OF A CASCADED RADAR SYSTEM
    81.
    发明申请
    CALIBRATION OF A CASCADED RADAR SYSTEM 审中-公开

    公开(公告)号：US20180292510A1

    公开(公告)日：2018-10-11

    申请号：US15692010

    申请日：2017-08-31

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Brian Ginsburg

    IPC: G01S7/40 ,  H01Q3/26

    Abstract: A cascaded radar system includes a device that is cascaded to another device to form a virtual antenna array, which may be used by each cascaded device to receive a return-microwave radar signal. A determination of a common dominant signal from the cascaded devices may be used to determine a phase mismatch, which is further utilized as a basis for adjusting a signal phase of the formed virtual antenna of the cascaded radar system.

    RANGE RESOLUTION IN FMCW RADARS
    86.
    发明申请
    RANGE RESOLUTION IN FMCW RADARS 审中-公开
    FMCW雷达中的范围分辨率

    公开(公告)号：US20160061942A1

    公开(公告)日：2016-03-03

    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

    IPC: G01S13/02 ,  G01S13/58 ,  G01S7/35

    CPC classification number: G01S13/583 ,  G01S7/35 ,  G01S13/343 ,  G01S2013/9314

    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.

    Abstract translation: 本公开提供了一种用于估计障碍物的范围的雷达装置。 雷达装置包括产生第一斜坡段和第二斜坡段的本地振荡器。 第一斜坡段和第二斜坡段各自包括起始频率，第一频率和第二频率。 当第一斜坡段的斜率和第二斜坡段的斜率相等且为正时，第二斜坡段的第一频率等于或大于第一斜坡段的第二频率。 当第一斜坡段的斜率和第二斜坡段的斜率相等且为负时，第二斜坡段的第一频率等于或小于第一斜坡段的第二频率。

    METHOD, SYSTEM, AND APPARATUS FOR REDUCING INACCURACY IN GLOBAL NAVIGATION SATELLITE SYSTEM POSITION AND VELOCITY SOLUTION
    87.
    发明申请
    METHOD, SYSTEM, AND APPARATUS FOR REDUCING INACCURACY IN GLOBAL NAVIGATION SATELLITE SYSTEM POSITION AND VELOCITY SOLUTION 有权
    用于减少全球导航卫星系统位置和速度解决方案中的不准确的方法，系统和装置

    公开(公告)号：US20140159950A1

    公开(公告)日：2014-06-12

    申请号：US13710154

    申请日：2012-12-10

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Atul Deshpande ,  Sthanunathan Ramakrishnan ,  Sandeep Rao

    IPC: G01S19/40

    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。

    RECEIVERS, CIRCUITS, AND METHODS TO IMPROVE GNSS TIME-TO-FIX AND OTHER PERFORMANCES
    88.
    发明申请
    RECEIVERS, CIRCUITS, AND METHODS TO IMPROVE GNSS TIME-TO-FIX AND OTHER PERFORMANCES 审中-公开
    接收机，电路和方法，以改进全球定位系统时间到时间和其他性能

    公开(公告)号：US20130227377A1

    公开(公告)日：2013-08-29

    申请号：US13860907

    申请日：2013-04-11

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Rao ,  Jawaharlal Tangudu ,  Karthik Ramasubramanian

    IPC: G06F11/10

    CPC classification number: G06F11/10 ,  G01S19/27

    Abstract: An electronic circuit (2250) for a satellite receiver (100, 2200). The electronic circuit (2250) includes a correlator circuit (2310) operable to supply a data signal including ephemeris data and a subsequent satellite time datum, and a data processor (2370, 2380) operable to infer satellite time TS from as few as one of the ephemeris data prior to the satellite time datum. Other circuits, devices, receivers, systems, processes of operation and processes of manufacture are also disclosed.

    Abstract translation: 一种用于卫星接收机（100,2200）的电子电路（2250）。 电子电路（2250）包括可操作以提供包括星历数据和随后的卫星时间数据的数据信号的相关器电路（2310），以及数据处理器（2370,2808），其可操作以从至少一个 在卫星时间基准之前的星历数据。 还公开了其它电路，设备，接收器，系统，操作过程和制造过程。

    ON-FIELD PHASE CALIBRATION
    89.
    发明申请
    ON-FIELD PHASE CALIBRATION 有权

    公开(公告)号：US20250123386A1

    公开(公告)日：2025-04-17

    申请号：US19002998

    申请日：2024-12-27

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sandeep Rao ,  Karthik Subburaj

    IPC: G01S13/58 ,  G01S7/40

    Abstract: An example radar system includes transmit, receive and processing circuitry. In operation, the radar system transmits first and second sets of chirp signals in which each chirp signal of the first set of chirp signals has an induced phase shift, receives reflected signals based on the transmitted first and second sets of chirp signals, and generates respective first and second sets of digital signals. Fourier Transform (FT) operations are performed on the first and second sets of digital signals to generate first and second arrays, respectively. The radar system identifies a first peak in the first array and a second peak in the second array representing an object in a field of view. The first and second peaks are at corresponding positions in the first and second arrays, respectively. The radar system then compares the phases of the first and second peaks to determine an actual phase shift for the induced phase shift.

    System and method for the compression of echolocation data
    90.
    发明授权
    System and method for the compression of echolocation data 有权

    公开(公告)号：US12265149B2

    公开(公告)日：2025-04-01

    申请号：US17405303

    申请日：2021-08-18

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Karthik Subburaj ,  Sandeep Rao

    IPC: G01S13/58 ,  G01S13/42

    Abstract: A method for compressing echolocation data is provided. The method includes dividing the echolocation data into a plurality of partitions, and selecting a first partition for processing. The method also includes combining echolocation data from the first partition with echolocation data within a second partition, and combining echolocation data from the first partition with echolocation data within a third partition. The method further includes storing the combined echolocation data for all of the plurality of partitions except for the first partition in a memory.

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