公开(公告)号：US12066566B2

公开(公告)日：2024-08-20

申请号：US17462086

申请日：2021-08-31

Applicant: Texas Instruments Incorporated

Inventor： Brian Paul Ginsburg ,  Karthik Subburaj ,  Karthik Ramasubramanian ,  Sachin Bhardwaj ,  Sriram Murali ,  Sandeep Rao

IPC: G01S7/35 ,  G01S7/02 ,  G01S7/40 ,  G01S13/32 ,  G01S13/931

CPC classification number: G01S7/352 ,  G01S7/023 ,  G01S7/40 ,  G01S13/32 ,  G01S13/931

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.

公开(公告)号：US11879968B2

公开(公告)日：2024-01-23

申请号：US17217584

申请日：2021-03-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Dan Wang ,  Sandeep Rao ,  Adeel Ahmad

IPC: G01S13/931 ,  G01S7/288 ,  G01S13/34 ,  G01S13/44 ,  G01S13/58 ,  H04B7/212

CPC classification number: G01S13/931 ,  G01S7/2883 ,  G01S13/34 ,  G01S13/449 ,  G01S13/583 ,  H04B7/212

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.

公开(公告)号：US20230408120A1

公开(公告)日：2023-12-21

申请号：US17876927

申请日：2022-07-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Dan Wang ,  Slobodan Jovanovic ,  Sandeep Rao

IPC: F24F11/30 ,  G05B15/02 ,  G01S13/89

CPC classification number: F24F11/30 ,  G05B15/02 ,  G01S13/89 ,  G05B2219/2642 ,  F24F2120/14

Abstract: A method is provided. In some examples, the method includes receiving a first user input at processing circuitry. The method also includes determining, by the processing circuitry based on a signal from a radar sensor, movement of a user in a room after receiving the first user input. In addition, the method includes determining, by the processing circuitry, a first estimated location of a first wall in the room based on a first portion of the movement of the user. The method further includes determining, by the processing circuitry, a second estimated location of a second wall in the room based on a second portion of the movement of the user.

公开(公告)号：US11811574B2

公开(公告)日：2023-11-07

申请号：US17722542

申请日：2022-04-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Peter Aberl ,  Sandeep Rao ,  Anil Mani

IPC: H04L27/26 ,  H04B1/40 ,  H04B1/71

CPC classification number: H04L27/265 ,  H04B1/40 ,  H04B1/7102

Abstract: A method is provided. In some examples, the method includes performing, by processing circuitry, a first transform operation on a first time-domain data set to generate a frequency-domain data set. In addition, the method includes determining, by the processing circuitry, that at least one portion of the frequency-domain data set satisfies a first threshold magnitude. The method also includes performing, by the processing circuitry, an inverse transform operation on the at least one portion of the frequency-domain data set to generate a second time-domain data set. The method further includes identifying, by the processing circuitry and based on the second time-domain data set, a region of interference in the first time-domain data set.

公开(公告)号：US20230231753A1

公开(公告)日：2023-07-20

申请号：US17722542

申请日：2022-04-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Peter Aberl ,  Sandeep Rao ,  Anil Mani

IPC: H04L27/26 ,  H04B1/71 ,  H04B1/40

CPC classification number: H04L27/265 ,  H04B1/7102 ,  H04B1/40

Abstract: A method is provided. In some examples, the method includes performing, by processing circuitry, a first transform operation on a first time-domain data set to generate a frequency-domain data set. In addition, the method includes determining, by the processing circuitry, that at least one portion of the frequency-domain data set satisfies a first threshold magnitude. The method also includes performing, by the processing circuitry, an inverse transform operation on the at least one portion of the frequency-domain data set to generate a second time-domain data set. The method further includes identifying, by the processing circuitry and based on the second time-domain data set, a region of interference in the first time-domain data set.

公开(公告)号：US11556421B2

公开(公告)日：2023-01-17

申请号：US17242636

申请日：2021-04-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao ,  Karthik Ramasubramanian ,  Brian Paul Ginsburg

IPC: G06F11/10 ,  G01S13/42 ,  G01S13/34 ,  G01S13/931 ,  G01S13/58 ,  G01S7/35 ,  G06F3/06

Abstract: Data memory protection is provided for a signal processing system such as a radar system in which the data memory is protected with a common set of parity bits rather than requiring a set of parity bits for each memory word as in Error Correction Coded (ECC) memories. The common set of parity bits may be updated as memory words in the data memory are accessed as part of signal processing of one or more digital signals. The memory protection ensures that in the absence of memory errors the common parity bits are zero at the end of processing the digital signals as long as each word in the data memory that is used for storing the signal processing data is written and read an equal number of times.

公开(公告)号：US11366211B2

公开(公告)日：2022-06-21

申请号：US16984246

申请日：2020-08-04

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Rao ,  Karthik Subburaj ,  Sriram Murali ,  Karthik Ramasubramanian

IPC: G01S13/28 ,  G06F17/14 ,  G01S7/41 ,  G01S13/536 ,  G01S13/931 ,  G01S13/34 ,  G01S7/35 ,  G06F17/13 ,  H04N5/232

Abstract: A radar system is provided that includes a radar transceiver integrated circuit (IC) configurable to transmit a first frame of chirps, and another radar transceiver IC configurable to transmit a second frame of chirps at a time delay ΔT, wherein ΔT=Tc/K, K≥2 and Tc is an elapsed time from a start of one chirp in the first frame and the second frame and a start of a next chirp in the first frame and the second frame, wherein the radar system is configured to determine a velocity of an object in a field of view of the radar system based on first digital intermediate frequency signals generated responsive to receiving reflected chirps of the first frame and second digital IF signals generated responsive to receiving reflected chirps of the time delayed second frame, wherein the maximum measurable velocity is increased by a factor of K.

公开(公告)号：US20210389418A1

公开(公告)日：2021-12-16

申请号：US17462086

申请日：2021-08-31

Applicant: Texas Instruments Incorporated

Inventor： Brian Paul Ginsburg ,  Karthik Subburaj ,  Karthik Ramasubramanian ,  Sachin Bhardwaj ,  Sriram Murali ,  Sandeep Rao

IPC: G01S7/35 ,  G01S7/40 ,  G01S13/32 ,  G01S7/02 ,  G01S13/931

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.

公开(公告)号：US20200321928A1

公开(公告)日：2020-10-08

申请号：US16851558

申请日：2020-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao ,  Brian Gingsburg

IPC: H03F3/217 ,  H03B5/12 ,  H01Q1/22 ,  H01Q3/26 ,  H03F3/24 ,  H03F3/45 ,  G01S3/14 ,  G01S13/34 ,  G01S7/35 ,  G01S13/931 ,  G01S13/42

Abstract: Disclosed examples include a radar system that operates in a first mode and a second mode. In the first mode, the system detects the presence of an object within a threshold range. In response to detection of the presence of the object, the system transitions to the second mode, and the system generates range data, velocity data, and angle data of the object in the second mode. When the object is no longer detected within the threshold range, the system transitions back to the first mode.

公开(公告)号：US10725162B2

公开(公告)日：2020-07-28

申请号：US15661891

申请日：2017-07-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao

IPC: G01S13/06 ,  G01S7/35 ,  G01S13/42 ,  G01S13/931 ,  H01Q3/26 ,  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.