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.

公开(公告)号：US20240305321A1

公开(公告)日：2024-09-12

申请号：US18668397

申请日：2024-05-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik SUBBURAJ ,  Pranav SINHA ,  Mayank Kumar SINGH ,  Rittu SACHDEV ,  Karan Singh BHATIA ,  Shailesh JOSHI ,  Indu PRATHAPAN

IPC: H04B1/00 ,  H04B1/04 ,  H04B1/10 ,  H04B1/69

CPC classification number: H04B1/0075 ,  H04B1/04 ,  H04B1/1036 ,  H04B1/69 ,  H04B2001/0408 ,  H04B2001/1045 ,  H04B2001/1063 ,  H04B2001/6912

Abstract: In a radar system, an intermediate frequency amplifier (IFA) is configured with two high-pass filter stages, each having an amplifier and a configurable impedance component. A control signal is activated as the radar system begins to transmit a chirp signal to lower the impedance of the configurable impedance components during an initial portion of the chirp transmission to achieve faster settling of the IFA output signal. After the initial portion, the control signal deactivates while transmission of the chirp continues to increase the impedance of the configurable impedance components to a level sufficient to effectively perform filtering of unwanted signals received by the radar system.

公开(公告)号：US20240288563A1

公开(公告)日：2024-08-29

申请号：US18654683

申请日：2024-05-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik SUBBURAJ ,  Karthik RAMASUBRAMANIAN ,  Shailesh JOSHI ,  Kameswaran VENGATTARAMANE ,  Indu PRATHAPAN

IPC: G01S13/04 ,  G01S7/35 ,  G06F16/22 ,  G06F16/901 ,  G06F17/14

CPC classification number: G01S13/04 ,  G01S7/35 ,  G06F16/2264 ,  G06F16/9017 ,  G06F17/142

Abstract: Systems and instruction carrying non-transitory processor-readable mediums are provided to facilitate access of radar data that may be scattered or non-uniformly located within a region of memory for further processing of such radar data. An example system includes counters that increment on different dimensions of the memory region, a lookup table, multipliers, an adder, and a wraparound mechanism to access different sets of non-contiguously stored radar data from a region of memory. The wraparound mechanism performs a wraparound operation when a combined address, generated by the adder based on addresses obtained by the multipliers, is greater than a last valid address in the region. The wraparound operation generates a new combined address that is used to fetch data from the memory. A transform operation is then performed on the fetched data.

公开(公告)号：US20220155368A1

公开(公告)日：2022-05-19

申请号：US17351750

申请日：2021-06-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujaata RAMALINGAM ,  Karthik SUBBURAJ ,  Pankaj GUPTA ,  Anil Varghese MANI ,  Karthik RAMASUBRAMANIAN ,  Indu PRATHAPAN

IPC: G01R31/317 ,  G01R29/26 ,  G11C19/28 ,  G01S7/40

Abstract: A system includes a shift register to store data samples, where the shift register includes a cell under test (CUT), a left guard cell, a right guard cell, a left window, and a right window. The system includes two sets of comparators to compare incoming data samples with data samples in the left window and the right window to compute ranks of the incoming data samples. The system includes a sorted index array to store a rank of the data samples in the shift register. The system includes a selector to select a Kth smallest index from the sorted index array and its corresponding data sample from the shift register. The system includes a target comparator, where the first comparator input receives a data sample from the CUT and the second comparator input receives a Kth smallest data sample, and the comparator output indicates a CFAR target detection.

公开(公告)号：US20140354475A1

公开(公告)日：2014-12-04

申请号：US13906104

申请日：2013-05-30

Applicant: Texas Instruments Incorporated

Inventor： Karthik SUBBURAJ ,  Jawaharlal TANGUDU ,  Sumeer BHATARA

IPC: G01S19/21

CPC classification number: G01S19/21

Abstract: A method of processing received satellite signals is provided. The method includes detecting frequency, power level, code phase and doppler frequency of a plurality of satellite signals and frequency and power level of a plurality of spurious signals. The plurality of spurious signals is ranked based on one or more ranking parameters. A first subset of the plurality of spurious signals which are ranked equal or above a threshold rank are processed through a plurality of notch filters and a second subset of the plurality of spurious signals which are ranked below the threshold rank are processed through a weeding filter.

Abstract translation: 提供一种处理接收到的卫星信号的方法。 该方法包括检测多个卫星信号的频率，功率电平，码相位和多普勒频率以及多个寄生信号的频率和功率电平。 基于一个或多个排序参数对多个假信号进行排名。 排列等于或高于阈值秩的多个寄生信号的第一子集通过多个陷波滤波器进行处理，并且通过除草滤波器处理排列在阈值级别之下的多个杂散信号的第二子集。