公开(公告)号：US11850027B2

公开(公告)日：2023-12-26

申请号：US17883028

申请日：2022-08-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Dan Wang ,  June Chul Roh ,  Adeel Ahmad

IPC: A61B5/00 ,  A61B5/0507 ,  G01S13/89 ,  G01S7/35 ,  G01S7/41 ,  A61B5/0205 ,  A61B5/08 ,  A61B5/024

CPC classification number: A61B5/0205 ,  A61B5/725 ,  A61B5/7214 ,  A61B5/7257 ,  A61B5/7278 ,  G01S7/354 ,  G01S7/356 ,  G01S7/412 ,  G01S13/89 ,  A61B5/02444 ,  A61B5/0507 ,  A61B5/0816

Abstract: A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return—mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.

公开(公告)号：US20220342036A1

公开(公告)日：2022-10-27

申请号：US17856109

申请日：2022-07-01

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Rao ,  Karthik Subburaj ,  Dan Wang ,  Adeel Ahmad

IPC: G01S7/35 ,  G01S13/42 ,  G01S13/92 ,  G01S13/34

Abstract: In accordance with described examples, a method determines if a velocity of an object detected by a radar is greater than a maximum velocity by receiving on a plurality of receivers at least one frame of chirps transmitted by at least two transmitters and reflected off of the object. A velocity induced phase shift (φd) in a virtual array vector S of signals received by each receiver corresponding to a sequence of chirps (frame) transmitted by each transmitter is estimated. Phases of each element of virtual array vector S are corrected using φd to generate a corrected virtual array vector Sc. A first Fourier transform is performed on the corrected virtual array vector Sc to generate a corrected virtual array spectrum to detect a signature that indicates that the object has an absolute velocity greater than a maximum velocity.

公开(公告)号：US20180279884A1

公开(公告)日：2018-10-04

申请号：US15717756

申请日：2017-09-27

Applicant: Texas Instruments Incorporated

Inventor： Adeel Ahmad ,  Dan Wang ,  June Chul Roh

IPC: A61B5/0205 ,  A61B5/00

Abstract: A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return-mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.

公开(公告)号：US11921229B2

公开(公告)日：2024-03-05

申请号：US17479002

申请日：2021-09-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Muhammad Zubair Ikram ,  Adeel Ahmad ,  Dan Wang ,  Murtaza Ali

IPC: G01S13/44 ,  G01S7/35 ,  G01S13/34 ,  G01S13/931

CPC classification number: G01S7/352 ,  G01S13/34 ,  G01S13/343 ,  G01S13/931

Abstract: An apparatus, including processing unit (PU) cores and computer readable storage devices storing machine instructions for determining a distance between a target object and a radar sensor circuit. The PU cores receive a beat signal generated by the radar sensor circuit and compensate for a phase difference between the received beat signal and a reconstruction of the received beat signal to obtain a phase compensated beat signal. The phase compensated beat signal is then filtered to remove spurious reflections by demodulating the phase compensated beat signal using an estimated frequency of the phase compensated beat signal. The PU cores then apply a low pass filter to the demodulated phase compensated beat signal, resulting in a modified beat signal. The PU cores then determine the distance between the target object and the radar sensor circuit using the modified beat signal.

公开(公告)号：US11988769B2

公开(公告)日：2024-05-21

申请号：US17856109

申请日：2022-07-01

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Rao ,  Karthik Subburaj ,  Dan Wang ,  Adeel Ahmad

IPC: G01S13/34 ,  G01S7/35 ,  G01S13/42 ,  G01S13/92

CPC classification number: G01S7/354 ,  G01S13/343 ,  G01S13/42 ,  G01S13/92 ,  G01S7/356

Abstract: In accordance with described examples, a method determines if a velocity of an object detected by a radar is greater than a maximum velocity by receiving on a plurality of receivers at least one frame of chirps transmitted by at least two transmitters and reflected off of the object. A velocity induced phase shift (φd) in a virtual array vector S of signals received by each receiver corresponding to a sequence of chirps (frame) transmitted by each transmitter is estimated. Phases of each element of virtual array vector S are corrected using φd to generate a corrected virtual array vector Sc. A first Fourier transform is performed on the corrected virtual array vector Sc to generate a corrected virtual array spectrum to detect a signature that indicates that the object has an absolute velocity greater than a maximum velocity.

公开(公告)号：US20220378313A1

公开(公告)日：2022-12-01

申请号：US17883028

申请日：2022-08-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Dan Wang ,  June Chul Roh ,  Adeel Ahmad

IPC: A61B5/0507 ,  A61B5/00 ,  G01S7/41 ,  G01S7/35 ,  G01S13/89

Abstract: A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return—mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.

公开(公告)号：US11412937B2

公开(公告)日：2022-08-16

申请号：US15717756

申请日：2017-09-27

Applicant: Texas Instruments Incorporated

Inventor： Adeel Ahmad ,  Dan Wang ,  June Chul Roh

IPC: A61B5/00 ,  A61B5/0205 ,  A61B5/08 ,  A61B5/024 ,  A61B5/0507

Abstract: A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return-mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.

公开(公告)号：US10302741B2

公开(公告)日：2019-05-28

申请号：US15089956

申请日：2016-04-04

Applicant: Texas Instruments Incorporated

Inventor： Adeel Ahmad ,  Dan Wang ,  Muhammad Zubair Ikram ,  Murtaza Ali

IPC: G01S7/35 ,  G01S7/41 ,  G01S13/93

Abstract: An FMCW radar is used to detect live objects by processing the matched, filtered radar return on a frame by frame basis. An FFT cross correlation coefficient is computed, followed by computing a modified geometric mean of the absolute value of the cross correlation coefficients. The modified geometric mean is then compared to a preset threshold to determine whether the object is moving or is stationary.

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

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

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.

公开(公告)号：US11454698B2

公开(公告)日：2022-09-27

申请号：US16679404

申请日：2019-11-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Muhammad Zubair Ikram ,  Adeel Ahmad

IPC: G01S7/40 ,  G01S7/41 ,  G01S13/93 ,  G01S13/931 ,  G01S13/06

Abstract: A device includes one or more processors configured to receive radar data, and generate a plurality of occupancy grid maps based on the radar data. Each of the occupancy grid maps corresponds to a respective one of a plurality of candidate angles. The one or more processors is also configured to select one of the candidate angles as a sensor mount angle based on the occupancy grid maps, and trigger an action based on the sensor mount angle and the radar data.