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：US12174311B2

公开(公告)日：2024-12-24

申请号：US17466867

申请日：2021-09-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anil Varghese Mani ,  Sandeep Rao ,  Dan Wang

IPC: G01S7/02 ,  G01S13/58

Abstract: In an example, a method is implemented in a radar system. The method may include transmitting, via transmission channels, a frame of chirps, the chirps transmitted having a programmed frequency offset that is a function of a transmission channel of the transmission channels that is transmitting the frame of chirps, receiving, via a receive channel, a frame of reflected chirps, the reflected chirps comprising the chirps reflected by an object within a field of view of the radar system, and determining a Doppler domain representation of the frame of reflected chirps having a Doppler domain spectrum that includes multiple spectrum bands, the object represented in at least a portion of the spectrum bands based on the reflected chirps, wherein the programmed frequency is configured to cause the Doppler domain spectrum to include a number of spectrum bands greater than the number of transmission channels.

公开(公告)号：US20240333304A1

公开(公告)日：2024-10-03

申请号：US18738203

申请日：2024-06-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Arthur John Redfern ,  Dan Wang

IPC: H03M7/30 ,  G06F13/28 ,  G06F17/16 ,  G06N3/045 ,  G06N3/063

CPC classification number: H03M7/30 ,  G06F13/28 ,  G06F17/16 ,  G06N3/063 ,  H03M7/3082 ,  H03M7/6029 ,  H03M7/6064 ,  G06N3/045

Abstract: A matrix compression/decompression accelerator (MCA) system/method that coordinates lossless data compression (LDC) and lossless data decompression (LDD) transfers between an external data memory (EDM) and a local data memory (LDM) is disclosed. The system implements LDC using a 2D-to-1D transformation of 2D uncompressed data blocks (2DU) within LDM to generate 1D uncompressed data blocks (1DU). The 1DU is then compressed to generate a 1D compressed superblock (CSB) in LDM. This LDM CSB may then be written to EDM with a reduced number of EDM bus cycles. The system implements LDD using decompression of CSB data retrieved from EDM to generate a 1D decompressed data block (1DD) in LDM. A 1D-to-2D transformation is then applied to the LDM 1DD to generate a 2D decompressed data block (2DD) in LDM. This 2DD may then be operated on by a matrix compute engine (MCE) using a variety of function operators.

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：US20200304141A1

公开(公告)日：2020-09-24

申请号：US16899632

申请日：2020-06-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Arthur John Redfern ,  Dan Wang

IPC: H03M7/30 ,  G06F13/28 ,  G06F17/16 ,  G06N3/063

Abstract: A matrix compression/decompression accelerator (MCA) system/method that coordinates lossless data compression (LDC) and lossless data decompression (LDD) transfers between an external data memory (EDM) and a local data memory (LDM) is disclosed. The system implements LDC using a 2D-to-1D transformation of 2D uncompressed data blocks (2DU) within LDM to generate 1D uncompressed data blocks (1DU). The 1DU is then compressed to generate a 1D compressed superblock (CSB) in LDM. This LDM CSB may then be written to EDM with a reduced number of EDM bus cycles. The system implements LDD using decompression of CSB data retrieved from EDM to generate a 1D decompressed data block (1DD) in LDM. A 1D-to-2D transformation is then applied to the LDM 1DD to generate a 2D decompressed data block (2DD) in LDM. This 2DD may then be operated on by a matrix compute engine (MCE) using a variety of function operators.

公开(公告)号：US20200292687A1

公开(公告)日：2020-09-17

申请号：US16832073

申请日：2020-03-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Murtaza Ali ,  Dan Wang ,  Muhammad Zubair Ikram

IPC: G01S13/34 ,  G01S7/35

Abstract: In the proposed low complexity technique a hierarchical approach is created. An initial FFT based detection and range estimation gives a coarse range estimate of a group of objects within the Rayleigh limit or with varying sizes resulting from widely varying reflection strengths. For each group of detected peaks, demodulate the input to near DC, filter out other peaks (or other object groups) and decimate the signal to reduce the data size. Then perform super-resolution methods on this limited data size. The resulting distance estimations provide distance relative to the coarse estimation from the FFT processing.

公开(公告)号：US20180224536A1

公开(公告)日：2018-08-09

申请号：US15699186

申请日：2017-09-08

Applicant: Texas Instruments Incorporated

Inventor： Dan Wang ,  Meysam Moallem ,  Brian Ginsburg

IPC: G01S13/44 ,  G01S13/50 ,  G01S13/87 ,  G01S7/02

Abstract: A millimeter or mm-wave system includes transmission of a millimeter wave (mm-wave) radar signal by a transmitter to an object. The transmitted mm-wave radar signal may include at least two signal orientations, and in response to each signal orientation, the object reflects corresponding signal reflections. The signal reflections are detected and a determination is made as to location of the object.