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公开(公告)号：US20170074974A1
公开(公告)日：2017-03-16
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.
Abstract translation: 本公开提供了一种雷达装置。 雷达装置包括发射第一啁啾的发射机。 第一啁啾被一个或多个障碍物分散以产生第一多个散射信号。 多个接收器接收第一多个散射信号。 多个接收机中的每个接收机响应于第一多个散射信号的散射信号产生数字信号。 处理器耦合到多个接收器并从多个接收器接收数字信号。 处理器对从多个接收机接收的数字信号执行范围FFT（快速傅立叶变换）和角度FFT，以产生第一复杂样本矩阵。
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公开(公告)号：US20250060451A1
公开(公告)日：2025-02-20
申请号：US18937386
申请日：2024-11-05
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anil Varghese MANI , Sandeep RAO , Dan WANG
Abstract: Radar systems, radar-implementation methods, and non-transitory processor-readable mediums storing processor-executable instructions for implementing radar chirp generation and processing are provided. An example set of processor-executable instructions includes instructions for configuring each of a plurality of transmitters to transmit each chirp of a set of chirps with a specific spin frequency that is different for each transmitter, in which the specific spin frequency is a function of an index value identifying the corresponding transmitter, and a number of the plurality of transmitters; and determining, in a frequency domain, a Doppler representation based on reflected signals that are reflected from one or more objects contacted by one or more chirps of the transmitted sets of chirps, in which the Doppler representation includes multiple spectrum bands including one or more empty spectrum bands determined by the specific spin frequency function, wherein none of the object(s) appear(s) in any of the empty spectrum band(s).
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13.发明申请公开(公告)号：US20250035744A1
公开(公告)日：2025-01-30
申请号：US18476965
申请日：2023-09-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Karthik SUBBURAJ , Sandeep RAO , Karthik RAMASUBRAMANIAN
IPC: G01S7/40 , G01S7/35 , G01S13/931
Abstract: In some examples, a method includes receiving, at a first device, a radar signal transmitted by a second device at a transmission frequency offset from a local oscillator (LO) frequency of the first device by a target offset and reflected off a target. The method also includes determining an intermediate frequency (IF) of the radar signal based on the transmission frequency and the LO frequency. The method also includes determining a parts per million (ppm) offset between the first device and the second device based on the intermediate frequency and the target offset.
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14.发明申请公开(公告)号：US20220317285A1
公开(公告)日：2022-10-06
申请号：US17217584
申请日：2021-03-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Dan WANG , Sandeep RAO , Adeel AHMAD
Abstract: A radar system comprises a set of transmitters and a processor coupled to the set of transmitters. The processor is configured to modulate a first portion of a chirp in a chirp frame according to a first phase. The processor is further configured to modulate a second portion of the chirp in the chirp frame according to a second phase and configured to combine the first and second portions of the chirp to produce a phase-modified chirp. The processor is further configured to instruct the set of transmitters to transmit the phase-modified chirp by applying time division multiple access (TDMA) and by directing radio frequency energy according to a target angle and a target gain.
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Patent Agency Ranking
公开(公告)号：US20220178720A1
公开(公告)日：2022-06-09
申请号：US17674993
申请日：2022-02-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jayawardan JANARDHANAN , Sandeep RAO , Goutam DUTTA
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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公开(公告)号：US20150247728A1
公开(公告)日：2015-09-03
申请号：US14711820
申请日：2015-05-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sandeep RAO , Deric Wayne WATERS
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.
Abstract translation: 汽车具有使用车速传感器从车轮和陀螺仪传感器读取旋转数据的导航系统。 对于多个误差参数值中的每一个，对于多个行进方向中的每一个行进的距离。 所述系统还包括选择误差参数值，所述误差参数值使在行进方向中的一个或多个方向上行进的距离最大化，将所选择的误差参数值应用于来自陀螺传感器的数据，以及使用基于来自车速传感器的数据的航位推算 和来自陀螺仪传感器的数据与应用的误差参数值。
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17.发明公开公开(公告)号：US20240035851A1
公开(公告)日：2024-02-01
申请号：US18480003
申请日：2023-10-03
Applicant: Texas Instruments Incorporated
Inventor： Jayawardan JANARDHANAN , Sandeep RAO , Goutam DUTTA
CPC classification number: G01C22/006 , G01C21/18 , G06F1/163 , G01C21/206 , G01P15/00 , G01C21/165 , G01C21/185 , G01C21/188 , G01F15/00
Abstract: A system for pedestrian use includes an accelerometer having multiple electronic sensors; an electronic circuit operable to generate a signal stream representing magnitude of overall acceleration sensed by the accelerometer, and to electronically correlate a sliding window 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 to compare different step periods for similarity, and if sufficiently similar then to update a portion of the circuit substantially representing a walking-step count; and an electronic display responsive to the electronic circuit to display information at least in part based on the step count. Other systems, electronic circuits and processes are disclosed.
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公开(公告)号：US20210364624A1
公开(公告)日：2021-11-25
申请号：US17183406
申请日：2021-02-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sachin BHARADWAJ, JR. , Sandeep RAO
Abstract: A radar data processing device includes at least one analog-to-digital converter (ADC) configured to digitize a plurality of input signals, wherein each input signal includes radar chirp and radar chirp reflection information received at one of a plurality of receiver antennas. The radar data processing device also includes Fast Fourier Transform (FFT) logic configured to generate FFT output samples based on each digitized input signal, wherein at least some of the generated FFT output samples are across antenna FFT output samples associated with at least two of the plurality of receiver antennas. The radar data processing device also includes a processor configured to determine a plurality of object parameters based on at least some of the generated FFT output samples, wherein the processor uses a neural network classifier trained to provide a confidence metric for at least one of the plurality of object parameters.
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公开(公告)号：US20130116921A1
公开(公告)日：2013-05-09
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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