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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.
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公开(公告)号：US20250004100A1
公开(公告)日：2025-01-02
申请号：US18391109
申请日：2023-12-20
Applicant: Texas Instruments Incorporated
Inventor： Jasbir Singh , Premkumar Seetharaman , Sandeep Rao , Rashmi Sachan
Abstract: An example device includes a memory that includes a first portion and a second portion, memory control circuitry structured to receive a first set of data associated with a first radar chirp, receive a second set of data associated with a second radar chirp, store a first subset of the first set of data in the first portion of the memory, store a first subset of the second set of data in the first portion of the memory adjacent to the first subset of the first set of data, and store a second subset of the first set of data and a second subset of the second set of data in the second portion of the memory.
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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
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.
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公开(公告)号：US20240272275A1
公开(公告)日：2024-08-15
申请号：US18222047
申请日：2023-07-14
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Anil Mani , Karthik Ramasubramanian
IPC: G01S7/35
CPC classification number: G01S7/352
Abstract: A radar system may include a radar sensor circuit, a compression estimation circuit, a compression circuit, and a data storage circuit. The radar sensor circuit may receive a set of sensor data associated with a radar chirp signal. The radar sensor circuit may generate a set of range data associated with the set of sensor data, which may include first range data for a first range bin and second range data for a second range bin. The compression estimation circuit may determine a first compression ratio for the first range data and a second compression ratio for the second range data. The compression circuit may compress the first and second range data based on the first and second compression ratios respectively. The compressed first and second range data may be stored at the data storage circuit.
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95.发明公开公开(公告)号：US20240134025A1
公开(公告)日：2024-04-25
申请号：US18491367
申请日：2023-10-19
Applicant: Arizona Board of Regents on Behalf of Arizona State University , Texas Instruments Incorporated
Inventor： Sule Ozev , Ferhat C. Ataman , Chethan Kumar Y.B. , Sandeep Rao
Abstract: A radar system applies various angle correction processes with varying levels of computational overhead to reduce errors in angle estimation when processing received return signals. The various angle correction processes aim to overcome systematic errors affected by range migration through correction based on simulation or hardware measurements, through non-iterative refinement, iterative refinement, and/or a combination of correction and iterative refinement.
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Patent Agency Ranking
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.
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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.
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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.
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公开(公告)号：US20220308196A1
公开(公告)日：2022-09-29
申请号：US17388954
申请日：2021-07-29
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Aleksandar Purkovic
Abstract: Methods and apparatus are disclosed low power motion detection by a radar apparatus. One example radar apparatus includes a transmitter to transmit a pattern of chirps. The transmitted pattern includes a first series of chirps transmitted during a first time period and a second series of chirps transmitted during a second time period that begins after passage of a sleep time period from an end of the first time period. The example radar apparatus also includes a receiver to detect returning chirps including reflected portions of the transmitted pattern. The example radar apparatus also includes analog to digital converter (ADC) coupled to the receiver. The ADC is to sample analog signals from the receiver to generate ADC samples for the returning chirps detected by the receiver.
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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.
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