公开(公告)号：US09817109B2

公开(公告)日：2017-11-14

申请号：US14633684

申请日：2015-02-27

Applicant: Texas Instruments Incorporated

Inventor： Krishnakant Vijay Saboo ,  Sandeep Rao

IPC: G01S13/02 ,  G01S13/58 ,  G01S7/41 ,  G06F3/01 ,  G01S7/35

CPC classification number: G01S13/02 ,  G01S7/415 ,  G01S13/58 ,  G01S13/584 ,  G01S2007/356 ,  G06F3/011 ,  G06F3/017

Abstract: A method for operating a frequency modulated continuous wave (FMCW) radar system is provided that includes generating digital intermediate frequency (IF) signals from radio frequency signals received by a small receive antenna array in the FMCW radar system and processing the digital IF signals to determine whether or not a gesture was performed.

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.

公开(公告)号：US09719786B2

公开(公告)日：2017-08-01

申请号：US14711820

申请日：2015-05-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao ,  Deric Wayne Waters

IPC: G01C21/16 ,  G01C17/38 ,  G01C21/00 ,  G01C21/06 ,  G01C21/26

CPC classification number: G01C21/18 ,  G01C17/38 ,  G01C19/42 ,  G01C21/005 ,  G01C21/06 ,  G01C21/16 ,  G01C21/26

Abstract: An automobile has a system for navigating using a vehicle speed sensor reading rotation data from a wheel and a gyroscopic sensor. For each of a plurality of error parameter values, a distance traveled for each of a plurality of directions of travel. The system also includes selecting the error parameter value that maximizes the distance traveled in one or more of the directions of travel, applying the selected error parameter value to data from the gyroscopic sensor, and navigating using dead reckoning based on data from the vehicle speed sensor and data from the gyroscopic sensor with the applied error parameter value.

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。

公开(公告)号：US20150285904A1

公开(公告)日：2015-10-08

申请号：US14319293

申请日：2014-06-30

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Rao

IPC: G01S13/06

CPC classification number: G01S13/06 ,  G01S7/354 ,  G01S13/42 ,  G01S13/931 ,  G01S2007/356 ,  G01S2013/9314 ,  G01S2013/9375 ,  G01S2013/9378 ,  G01S2013/9389 ,  H01Q3/2629 ,  H01Q25/00

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.

Abstract translation: 一种使用雷达装置估计多个障碍物的障碍物的位置的方法。 估计障碍物的方位频率，仰角频率和范围，以产生估计的方位角频率，估计的仰角频率和障碍物的估计范围。 从估计的方位角频率，估计的仰角频率和估计的障碍范围中的一个或多个估计度量。 将度量与阈值进行比较以检测估计的方位角频率和估计的仰角频率中的至少一个中的误差。 在误差检测中，将估计的方位角频率和估计的仰角频率中的至少一个的符号反转，以分别产生真实的估计方位频率和真实的估计仰角频率。

公开(公告)号：US20150219768A1

公开(公告)日：2015-08-06

申请号：US14686310

申请日：2015-04-14

Applicant: Texas Instruments Incorporated

Inventor： Goutam Dutta ,  Tarkesh Pande ,  Sandeep Rao ,  Deric W. Waters

IPC: G01S19/47 ,  G01S19/52 ,  G01S19/20 ,  G01S19/49

CPC classification number: G01S19/47 ,  G01C21/165 ,  G01S19/20 ,  G01S19/49 ,  G01S19/52

Abstract: Embodiments of the disclosure provide a cross coupled position engine architecture for sensor integration in a Global Navigation Satellite System. In one embodiment, a data processing engine for processing inertial sensor data within a positioning system receiver is disclosed. The data processing engine includes a first input for receiving the sensor data, and a second input for receiving a positioning data. The data processing system also includes a memory and a processor. The processor of the data processing system is coupled to the memory and to the first and second input. The processor of the data processing system is configured to calculate a net acceleration profile data from the inertial sensor data and from the positioning data. The net acceleration profile data calculated by the processor of the data processing system is used for the Global Positioning System (GPS) receiver to subsequently calculate a position and a velocity data.

Abstract translation: 本公开的实施例提供了用于全球导航卫星系统中的传感器集成的交叉耦合位置引擎结构。 在一个实施例中，公开了一种用于在定位系统接收器内处理惯性传感器数据的数据处理引擎。 数据处理引擎包括用于接收传感器数据的第一输入端和用于接收定位数据的第二输入端。 数据处理系统还包括存储器和处理器。 数据处理系统的处理器耦合到存储器和第一和第二输入端。 数据处理系统的处理器被配置为从惯性传感器数据和定位数据计算净加速度曲线数据。 由数据处理系统的处理器计算的净加速度曲线数据用于全球定位系统（GPS）接收机，以随后计算位置和速度数据。