公开(公告)号：US20250123386A1

公开(公告)日：2025-04-17

申请号：US19002998

申请日：2024-12-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao ,  Karthik Subburaj

IPC: G01S13/58 ,  G01S7/40

Abstract: An example radar system includes transmit, receive and processing circuitry. In operation, the radar system transmits first and second sets of chirp signals in which each chirp signal of the first set of chirp signals has an induced phase shift, receives reflected signals based on the transmitted first and second sets of chirp signals, and generates respective first and second sets of digital signals. Fourier Transform (FT) operations are performed on the first and second sets of digital signals to generate first and second arrays, respectively. The radar system identifies a first peak in the first array and a second peak in the second array representing an object in a field of view. The first and second peaks are at corresponding positions in the first and second arrays, respectively. The radar system then compares the phases of the first and second peaks to determine an actual phase shift for the induced phase shift.

公开(公告)号：US12265149B2

公开(公告)日：2025-04-01

申请号：US17405303

申请日：2021-08-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik Subburaj ,  Sandeep Rao

IPC: G01S13/58 ,  G01S13/42

Abstract: A method for compressing echolocation data is provided. The method includes dividing the echolocation data into a plurality of partitions, and selecting a first partition for processing. The method also includes combining echolocation data from the first partition with echolocation data within a second partition, and combining echolocation data from the first partition with echolocation data within a third partition. The method further includes storing the combined echolocation data for all of the plurality of partitions except for the first partition in a memory.

公开(公告)号：US12196847B2

公开(公告)日：2025-01-14

申请号：US16121689

申请日：2018-09-05

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Rao ,  Karthik Subburaj ,  Brian Ginsburg ,  Karthik Ramasubramanian ,  Jawaharlal Tangudu ,  Sachin Bharadwaj

IPC: G01S13/58 ,  G01S7/35 ,  G01S13/34 ,  G01S13/931

Abstract: The disclosure provides a radar apparatus for estimating a range of an obstacle. The radar apparatus includes a local oscillator that generates a first ramp segment and a second ramp segment. The first ramp segment and the second ramp segment each includes a start frequency, a first frequency and a second frequency. The first frequency of the second ramp segment is equal to or greater than the second frequency of the first ramp segment when a slope of the first ramp segment and a slope of the second ramp segment are equal and positive. The first frequency of the second ramp segment is equal to or less than the second frequency of the first ramp segment when the slope of the first ramp segment and the slope of the second ramp segment are equal and negative.

公开(公告)号：US20240069186A1

公开(公告)日：2024-02-29

申请号：US18502445

申请日：2023-11-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao ,  Karthik Subburaj

IPC: G01S13/58 ,  G01S7/40

CPC classification number: G01S13/584 ,  G01S7/40

Abstract: A radar transceiver includes a phase shifter that is controlled to apply an induced phase shift in a first subset of chirp signals of a frame of chirp signals, which also includes a second subset of chirp signals in which no phase shift is applied. Other circuitry generates digital signals based on received reflected signals, which are based on transmitted signals. Processing circuitry performs a Fast Fourier Transform (FFT) on a first subset of digital signals, corresponding to the first subset of chirp signals, to generate a first range-Doppler array, and performs a FFT on the second subset of digital signals, corresponding to the second subset of chirp signals, to generate a second range-Doppler array; identifies peaks in the first and second range-Doppler arrays to detect an object; and compares a phases of peaks at corresponding positions in the first and second range-Doppler arrays to determine a measured phase shift between the two peaks.

公开(公告)号：US11846700B2

公开(公告)日：2023-12-19

申请号：US17132857

申请日：2020-12-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sandeep Rao ,  Karthik Subburaj

IPC: G01S13/58 ,  G01S7/40

CPC classification number: G01S13/584 ,  G01S7/40

Abstract: A radar system is provided and includes a radar transceiver integrated circuit (IC) and a processor coupled to the radar transceiver IC. The radar transceiver IC includes a chirp generator configured to generate a plurality of chirp signals and a phase shifter configured to induce a signal phase shift. The radar transceiver IC is configured to transmit a frame of chirps based on the plurality of chirp signals and generate a plurality of digital signals, each digital signal corresponding to a respective reflection received based on the plurality of chirp signals. The processor is configured to control the phase shifter to induce the signal phase shift in a first subset of chirp signals of the plurality of chirp signals and determine a phase shift induced in the first subset of chirp signals by the phase shifter based on the digital signal.

公开(公告)号：US11782148B2

公开(公告)日：2023-10-10

申请号：US16363719

申请日：2019-03-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01S13/58 ,  G01S7/35 ,  G01S13/34

CPC classification number: G01S13/584 ,  G01S7/352 ,  G01S7/356 ,  G01S13/343 ,  G01S13/345

Abstract: Aspects of the present disclosure provide for a radar system including a radar IC including a timing engine, a local oscillator, and a modulator. The timing engine is configured to generate one or more chirp control signals. The local oscillator is configured to receive the one or more chirp control signals and generate a frame including a first sequence of chirps according to the one or more chirp control signals. The modulator is configured to modulate the first sequence of chirps to generate a second sequence of chirps so the frame includes the first sequence of chirps and the second sequence of chirps offset by a first frequency value.

公开(公告)号：US11740345B2

公开(公告)日：2023-08-29

申请号：US16294764

申请日：2019-03-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shankar Ram Narayana Moorthy ,  Karthik Subburaj ,  Anil KV Kumar

IPC: G01S13/58 ,  G01S13/34 ,  G01S7/35 ,  G01S7/02

CPC classification number: G01S13/343 ,  G01S7/023 ,  G01S7/0234 ,  G01S7/0235 ,  G01S7/354 ,  G01S13/584 ,  G01S7/356

Abstract: A method for a radar system includes transmitting, by a transmit channel of the radar system, a frame comprising first, second, and third chirps. Each chirp has a chirp start frequency, and the chirp start frequency of the transmitted chirps is dithered. The method also includes receiving, by a receive channel of the radar system, a frame of reflected chirps based on the transmitted frame, and generating a digital intermediate frequency (IF) signal.

公开(公告)号：US11630185B2

公开(公告)日：2023-04-18

申请号：US17097390

申请日：2020-11-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik Subburaj ,  Vashishth Dudhia ,  Shailesh Joshi

IPC: G01S7/40

Abstract: A method for calibrating a cascaded radar system includes transmitting first radar transmission signal from a radar device. First radar reflection signals corresponding to the respective first radar transmission signal reflected from calibration target are received at each of the radar devices. The first radar reflection signals are demodulated to generate first baseband signals at each of the radar devices. A second radar transmission signal is modulated with respect to the first radar transmission signal at the respective one of the radar devices. The second radar transmission signal is transmitted from the respective one of the radar devices and are received as second radar reflection signals at each of the radar devices. The second radar reflection signals are demodulated to generate second baseband signals at each of the radar devices, and each of the radar devices are calibrated based on the first and second baseband signals.

公开(公告)号：US20220236399A1

公开(公告)日：2022-07-28

申请号：US17405303

申请日：2021-08-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik Subburaj ,  Sandeep Rao

IPC: G01S13/58 ,  G01S13/42

Abstract: A method for compressing echolocation data is provided. The method includes dividing the echolocation data into a plurality of partitions, and selecting a first partition for processing. The method also includes combining echolocation data from the first partition with echolocation data within a second partition, and combining echolocation data from the first partition with echolocation data within a third partition. The method further includes storing the combined echolocation data for all of the plurality of partitions except for the first partition in a memory.

公开(公告)号：US11231484B2

公开(公告)日：2022-01-25

申请号：US16816588

申请日：2020-03-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik Subburaj ,  Brian Paul Ginsburg ,  Daniel Colum Breen ,  Sandeep Rao ,  Karthik Ramasubramanian

IPC: G01S7/40 ,  G01S7/03 ,  G01S7/35 ,  G01S13/931 ,  G01S13/02

Abstract: Methods for monitoring of performance parameters of one or more receive channels and/or one or more transmit channels of a radar system-on-a-chip (SOC) are provided. The radar SOC may include a loopback path coupling at least one transmit channel to at least one receive channel to provide a test signal from the at least one transmit channel to the at least one receive channel when the radar SOC is operated in test mode. In some embodiments, the loopback path includes a combiner coupled to each of one or more transmit channels, a splitter coupled to each of one or more receive channels, and a single wire coupling an output of the combiner to an input of the splitter.