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公开(公告)号：US20190011533A1
公开(公告)日：2019-01-10
申请号：US16120129
申请日：2018-08-31
Applicant: Texas Instruments Incorporated
Inventor： Brian Paul Ginsburg , Karthik Subburaj , Karthik Ramasubramanian , Sachin Bhardwaj , Sriram Murali , Sandeep Rao
Abstract: A frequency modulated continuous wave (FMCW) radar system is provided that includes a receiver configured to generate a digital intermediate frequency (IF) signal, and an interference monitoring component coupled to the receiver to receive the digital IF signal, in which the interference monitoring component is configured to monitor at least one sub-band in the digital IF signal for interference, in which the at least one sub-band does not include a radar signal.
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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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公开(公告)号：US10078131B2
公开(公告)日：2018-09-18
申请号：US14855057
申请日：2015-09-15
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Ramasubramanian
CPC classification number: G01S7/352 , G01S13/42 , G01S13/584 , G01S13/588 , G01S13/89 , G01S13/931 , G01S2007/356 , G01S2013/9332
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.
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公开(公告)号：US09733340B2
公开(公告)日：2017-08-15
申请号：US14550774
申请日：2014-11-21
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Ramasubramanian , Brian Ginsburg , Jawaharlal Tangudu , Karthik Subburaj
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.
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公开(公告)号：US20150185316A1
公开(公告)日：2015-07-02
申请号：US14329446
申请日：2014-07-11
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Saurabh Khanna
IPC: G01S13/06
CPC classification number: G01S7/032 , G01S7/354 , G01S13/34 , G01S13/42 , G01S13/931 , H01Q1/3233 , H01Q3/247 , H01Q3/2629 , 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.
Abstract translation: 一种用于估计多个障碍物的位置的雷达装置。 雷达装置包括接收天线单元。 接收天线单元包括天线的线性阵列和在线性天线阵列中与至少一个天线预定偏移的附加天线。 雷达装置还包括信号处理单元。 信号处理单元从天线的线阵列从多个障碍物接收的信号估计与多个障碍物的每个障碍物相关的方位角频率。 此外，信号处理单元从与每个障碍物相关联的估计的方位角频率估计与每个障碍物相关联的方位角和仰角。
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Patent Agency Ranking
16.发明申请公开(公告)号：US20150017939A1
公开(公告)日：2015-01-15
申请号：US14506001
申请日：2014-10-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Deric Wayne Waters , Sandeep Rao , Karthik Ramasubramanian
IPC: H04B17/00
Abstract: Embodiments of the invention provide a method for detecting false peaks in a Global Navigation Satellite System (GNSS) having a power control circuit, a measurement engine, and position engine. An estimated pseudorange is filtered over time. A false peak is declared if the filtered pseudorange error is greater than a threshold.
Abstract translation: 本发明的实施例提供了一种用于在具有功率控制电路，测量引擎和位置引擎的全球导航卫星系统（GNSS）中检测假峰值的方法。 估计伪距随时间过滤。 如果滤波的伪距误差大于阈值，则声明假峰。
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公开(公告)号：US08825397B2
公开(公告)日：2014-09-02
申请号：US13668381
申请日：2012-11-05
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Kasargod , Sandeep Rao , Karthik Ramasubramanian , Tarkesh Pande , Sriram Murali
CPC classification number: G01C21/12 , G01C21/165 , G01S19/42 , G01S19/45
Abstract: A vehicle navigation system includes a GNSS position engine (GPE) that uses GNSS satellite measurements to compute a first position and velocity of a vehicle and a first quality metric associated with the position and velocity. The system also includes a dead reckoning engine (DRE) that operates parallel with the GPE that computes a second position and velocity and a second quality metric associated with the dead reckoning. The GPE is configured to use the second position and velocity to detect a set of outliers in an incoming GNSS measurement; use the second position and velocity as an initial estimate of its position and velocity for a particular time instant, which is then refined by GNSS measurements received at that particular time instant; and to replace the first position and velocity with the second position and velocity.
Abstract translation: 车辆导航系统包括使用GNSS卫星测量来计算车辆的第一位置和速度以及与位置和速度相关联的第一质量度量的GNSS位置引擎（GPE）。 该系统还包括与计算第二位置和速度的GPE并行运行的航位推算引擎（DRE），以及与推算相关联的第二质量度量。 GPE被配置为使用第二位置和速度来检测进入GNSS测量中的一组异常值; 使用第二位置和速度作为其在特定时间瞬间的位置和速度的初始估计，然后通过在该特定时刻接收的GNSS测量来改进; 并用第二位置和速度来替换第一位置和速度。
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18.发明授权公开(公告)号：US12169239B2
公开(公告)日：2024-12-17
申请号：US18540151
申请日：2023-12-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Dan Wang , Sandeep Rao , Adeel Ahmad
Abstract: A radar system includes a set of transmitters and a processor coupled to the set of transmitters, which includes first, second, third and fourth transmitters. In operation, the processor generates a first chirp of a set of chirps, in which outputs of the first and second transmitters are modulated by a first phase and outputs of the third and fourth transmitters are modulated by a second phase; and generate a second chirp of the set of chirps, in which outputs of the first and fourth transmitters are modulated by the first phase and outputs of the second and third transmitters are modulated by the second phase.
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公开(公告)号：US20240031214A1
公开(公告)日：2024-01-25
申请号：US18479738
申请日：2023-10-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Peter Aberl , Sandeep Rao , Anil Mani
CPC classification number: H04L27/265 , H04B1/40 , H04B1/7102
Abstract: A non-transitory device-readable medium, which may be embodied in a device, such as a radar receiver, stores instructions that, when executed by processing circuitry, are configured to perform operations to identify a region of interference. An analog signal is generated based on received signals reflected from a target object and an interfering object. The analog signal is converted to an initial time-domain data set. Processing circuitry is configured or instructed to perform a transform operation on the initial time-domain data set to generate a frequency-domain data set, based on which a region of interference may be identified. Subsequent operations may be performed to facilitate identification of the region of interest including thresholding, inverse transforming, subtracting, and/or combining. The processing circuitry may be further configured or instructed to generate repaired time-domain data from which corrupted time-domain samples to remove data associated with the interfering object.
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公开(公告)号：US11808605B2
公开(公告)日：2023-11-07
申请号：US17674993
申请日：2022-02-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jayawardan Janardhanan , Sandeep Rao , Goutam Dutta
CPC classification number: G01C22/006 , G01C21/165 , G01C21/18 , G01C21/185 , G01C21/188 , G01C21/206 , G01P15/00 , G06F1/163 , G01C21/1654 , G01C21/1656 , G01F15/00
Abstract: A system (10) for pedestrian use includes an accelerometer (110) having multiple electronic sensors; an electronic circuit (100) operable to generate a signal stream representing magnitude of overall acceleration sensed by the accelerometer (110), and to electronically correlate a sliding window (520) of the signal stream with itself to produce peaks at least some of which represent walking steps, and further operable to electronically execute a periodicity check (540) to compare different step periods for similarity, and if sufficiently similar then to update (560) a portion of the circuit substantially representing a walking-step count; and an electronic display (190) responsive to the electronic circuit (100) to display information at least in part based on the step count. Other systems, electronic circuits and processes are disclosed.
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