-
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
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
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
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
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.
-
Patent Agency Ranking
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
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.
-
公开(公告)号：US11194017B2
公开(公告)日：2021-12-07
申请号：US16984262
申请日：2020-08-04
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Indu Prathapan , Karthik Ramasubramanian , Brian P. Ginsburg
Abstract: A FMCW radar system with a built-in self-test (BIST) system for monitoring includes a receiver, a transmitter, and a frequency synthesizer. A FMCW chirp timing engine controls timing of operations at least one radar component. The BIST system includes at least one switchable coupling for coupling a first plurality of different analog signals including from a first plurality of selected nodes in the receiver or transmitter that are all coupled to a second number of monitor analog-to-digital converters (ADCs). The second number is less than (
-
公开(公告)号：US10816655B2
公开(公告)日：2020-10-27
申请号：US15638106
申请日：2017-06-29
Applicant: Texas Instruments Incorporated
Inventor： Sachin Bharadwaj , Karthik Subburaj , Sriram Murali
IPC: G01S13/44 , G06K9/52 , G01S7/40 , G01S13/90 , G06K9/32 , G01S13/30 , G01S7/35 , G01S13/02 , G01S7/41 , G01S13/00
Abstract: A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.
-
-
-
-
-
-
-
-
-
Search Results
109
records
(took 0.026 seconds)
