公开(公告)号：US20240176014A1

公开(公告)日：2024-05-30

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

CPC classification number: G01S13/931 ,  G01S7/2883 ,  G01S13/34 ,  G01S13/449 ,  G01S13/583 ,  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：US20230072441A1

公开(公告)日：2023-03-09

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：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

IPC: G01S7/02 ,  G01S13/58

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).

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

IPC: G01S13/931 ,  G01S7/288 ,  G01S13/58 ,  G01S13/44 ,  G01S13/34 ,  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：US20190178987A1

公开(公告)日：2019-06-13

申请号：US16201726

申请日：2018-11-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Muhammad Zubair IKRAM ,  Adeel AHMAD ,  Dan WANG ,  Murtaza ALI

IPC: G01S7/35 ,  G01S13/34

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：US20220206109A1

公开(公告)日：2022-06-30

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: G01S7/35 ,  G01S13/34 ,  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.