Patents by Inventor Sandeep Rao

Sandeep Rao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250247282
    Abstract: A radar device includes processing circuitry to perform operations to identify corrupted data samples in an initial time-domain data set generated from return signals reflected from a target object and also signals from an interfering object causing the corruption. The processing circuitry also performs operations starting on the initial time-domain data set to generate reconstructed data corresponding to the corrupted data samples. An uncorrupted time-domain data set is then generated based on the initial time-domain data set and the corrupted data samples, and repaired time-domain data set is generated based on the uncorrupted time-domain data set and the reconstructed data. The operations performed include thresholding, transforming, inverse transforming, subtracting, and/or combining. The processing circuitry may be hard coded and/or be configured to execute software instructions stored in a memory to perform the processing.
    Type: Application
    Filed: March 19, 2025
    Publication date: July 31, 2025
    Inventors: Peter Aberl, Sandeep Rao, Anil Mani
  • Publication number: 20250208255
    Abstract: Various examples disclosed herein relate to digital signal processing, and particularly, to processing range data using Fast-Fourier Transform (FFT) operations. In an example, a system includes transceiver circuitry and processing circuitry coupled to the transceiver circuitry. The transceiver circuitry is configured to receive signals reflected off an object and generate radar data based on the signals. The processing circuitry is configured to perform a first FFT operation on the radar data to produce a first set of range data, perform a frequency shift on the radar data, perform a second FFT operation on the frequency shifted radar data to produce a second set of range data, and produce a third set of range data by collating the first set of range data and a portion of the second set of range data or collating a portion of the first set of range data and the second set of range data.
    Type: Application
    Filed: March 26, 2024
    Publication date: June 26, 2025
    Inventors: Sandeep Rao, Karthik Subburaj
  • Publication number: 20250199154
    Abstract: Systems and methods for compressing data are provided. An example method includes generating range data based on digital data of received signals resulting from transmitted radar chirps being reflected, in which the range data is distributed among range bins; partitioning the range bins into multiple sections, each of which includes a respective set of range bins, in which a first section includes range data spanning a closest range and a last section includes range data spanning a farthest range; merging range data in a section with range data in two adjacent sections that are between the first and last sections; storing merged range data in the two other sections in respective regions of a memory; processing the merged range data to generate range-velocity data and/or range-angle data; and analyzing such data to determine whether a target is present in the section.
    Type: Application
    Filed: February 26, 2025
    Publication date: June 19, 2025
    Inventors: Karthik Subburaj, Sandeep Rao
  • Publication number: 20250203048
    Abstract: Various embodiments of the present disclosure relate to video surveillance systems, and in particular, to determining when to wake-up a camera based on gathered radar data. In an example embodiment a system including transceiver circuitry and processing circuitry is provided. The transceiver circuitry is configured to transmit and receive radar signals. The processing circuitry is coupled with the transceiver circuitry and is configured to generate point cloud data associated with a scene and obtain a radar-space region of interest (ROI) based on the point cloud data. Further, the processing circuitry is configured to identify a location of an object moving in the scene based at least on a radar signal received by the transceiver circuitry. The processing circuitry is also configured to determine to wake-up a camera based on the location of the object in the scene and the radar-space ROI.
    Type: Application
    Filed: April 25, 2024
    Publication date: June 19, 2025
    Inventors: Sandeep Rao, Manu Mathew, Nathan Block
  • Publication number: 20250180697
    Abstract: Radar systems, devices, methods, and non-transitory mediums storing instructions for causing execution of radar signal processing operations are provided. Multiple chirps are transmitted, in which each chirp includes a first chirp segment having a first bandwidth spanning a first frequency range and a second chirp segment having a second bandwidth spanning a second, different, frequency range. For each chirp, the second chirp segment is transmitted a specific time after the first chirp segment. The chirps are sampled to generate first and second sets of sampled data corresponding to the first chirp segments and second chirp segments, respectively.
    Type: Application
    Filed: February 4, 2025
    Publication date: June 5, 2025
    Inventors: Karthik Subburaj, Sandeep Rao
  • Publication number: 20250167800
    Abstract: A radar system is provided that includes a compression component configured to compress blocks of range values to generate compressed blocks of range values, and a radar data memory configured to store compressed blocks of range values generated by the compression component. In an example, the compression component parameter determination engine to determine a compression parameter for a type of compression to yield a compressed output of the block of range values that is less than or equal to a specified size. The compression parameter may be a scale factor, or may be a Golomb parameter and a scale factor, depending on the type of compression. The compression component further includes an encoder to compress, using the type of compression, the block of range values to generate a compressed block of range values based on the compression parameter.
    Type: Application
    Filed: January 17, 2025
    Publication date: May 22, 2025
    Inventors: Anil Mani, Sandeep Rao, Karthik Ramasubramanian
  • Publication number: 20250166070
    Abstract: The described technology relates to a real-time processing of network packets. An example system relates to reordering messages received at a server over a communication network from distributed clients, in order to, among other things, eliminate or at least substantially reduce the effects of jitter (delay variance) experienced in the network. The reordering of messages may enable the example data processing application to improve the consistency of processing packets in the time order of when the respective packets entered a geographically distributed network.
    Type: Application
    Filed: January 17, 2025
    Publication date: May 22, 2025
    Inventors: Sandeep RAO, Thomas FAY, Dominick PANISCOTTI, Yuriy BUGLO
  • Patent number: 12284068
    Abstract: A non-transitory device-readable medium, which may be embodied in a device, such as a radar receiver, stores instructions that, when executed by processing circuitry, are configured to perform operations to identify a region of interference. An analog signal is generated based on received signals reflected from a target object and an interfering object. The analog signal is converted to an initial time-domain data set. Processing circuitry is configured or instructed to perform a transform operation on the initial time-domain data set to generate a frequency-domain data set, based on which a region of interference may be identified. Subsequent operations may be performed to facilitate identification of the region of interest including thresholding, inverse transforming, subtracting, and/or combining. The processing circuitry may be further configured or instructed to generate repaired time-domain data from which corrupted time-domain samples to remove data associated with the interfering object.
    Type: Grant
    Filed: October 2, 2023
    Date of Patent: April 22, 2025
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Peter Aberl, Sandeep Rao, Anil Mani
  • Publication number: 20250123386
    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.
    Type: Application
    Filed: December 27, 2024
    Publication date: April 17, 2025
    Inventors: Sandeep Rao, Karthik Subburaj
  • Patent number: 12265149
    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.
    Type: Grant
    Filed: August 18, 2021
    Date of Patent: April 1, 2025
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Karthik Subburaj, Sandeep Rao
  • Patent number: 12248091
    Abstract: An apparatus comprises processor cores and computer-readable mediums storing machine instructions for the processor cores. When executing the machine instructions, the processor cores obtain received signals for transmitted chirps from a radar sensor circuit. Each transmitted chirp comprises an A chirp segment, a time gap, and a B chirp segment, respectively. The processor cores sample the received signals to obtain sampled data matrices M1(A) for the A chirp segments and M1(B) for the B chirp segments. The processor cores perform a first Fourier transform (FT) on each column of M1(A) and M1(B) to obtain velocity matrices M2(A) and M2(B), respectively. The processor cores apply a phase compensation factor to M2(B) to obtain a phase corrected velocity matrix M2(B?), and concatenate M2(A) and M2(B?) to obtain an aggregate velocity matrix M2(A&B?). The processor cores perform a second FT on each row of M2(A&B?) to obtain a range and velocity matrix M3(A&B?).
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: March 11, 2025
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Karthik Subburaj, Sandeep Rao
  • Patent number: 12250007
    Abstract: A radar system is provided that includes a compression component configured to compress blocks of range values to generate compressed blocks of range values, and a radar data memory configured to store compressed blocks of range values generated by the compression component.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: March 11, 2025
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anil Mani, Sandeep Rao, Karthik Ramasubramanian
  • Patent number: 12235347
    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.
    Type: Grant
    Filed: November 6, 2023
    Date of Patent: February 25, 2025
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sandeep Rao, Karthik Subburaj
  • Publication number: 20250060451
    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.
    Type: Application
    Filed: November 5, 2024
    Publication date: February 20, 2025
    Inventors: Anil Varghese MANI, Sandeep RAO, Dan WANG
  • Patent number: 12217308
    Abstract: The described technology relates to a real-time processing of network packets. An example system relates to reordering messages received at a server over a communication network from distributed clients, in order to, among other things, eliminate or at least substantially reduce the effects of jitter (delay variance) experienced in the network. The reordering of messages may enable the example data processing application to improve the consistency of processing packets in the time order of when the respective packets entered a geographically distributed network.
    Type: Grant
    Filed: August 8, 2022
    Date of Patent: February 4, 2025
    Assignee: NASDAQ, INC.
    Inventors: Sandeep Rao, Thomas Fay, Dominick Paniscotti, Yuriy Buglo
  • Publication number: 20250035744
    Abstract: In some examples, a method includes receiving, at a first device, a radar signal transmitted by a second device at a transmission frequency offset from a local oscillator (LO) frequency of the first device by a target offset and reflected off a target. The method also includes determining an intermediate frequency (IF) of the radar signal based on the transmission frequency and the LO frequency. The method also includes determining a parts per million (ppm) offset between the first device and the second device based on the intermediate frequency and the target offset.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 30, 2025
    Inventors: Karthik SUBBURAJ, Sandeep RAO, Karthik RAMASUBRAMANIAN
  • Patent number: 12196847
    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.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: January 14, 2025
    Assignee: Texas Instruments Incorporated
    Inventors: Sandeep Rao, Karthik Subburaj, Brian Ginsburg, Karthik Ramasubramanian, Jawaharlal Tangudu, Sachin Bharadwaj
  • Publication number: 20250004100
    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.
    Type: Application
    Filed: December 20, 2023
    Publication date: January 2, 2025
    Inventors: Jasbir Singh, Premkumar Seetharaman, Sandeep Rao, Rashmi Sachan
  • Patent number: 12174311
    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.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: December 24, 2024
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anil Varghese Mani, Sandeep Rao, Dan Wang
  • Patent number: 12169239
    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.
    Type: Grant
    Filed: December 14, 2023
    Date of Patent: December 17, 2024
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Dan Wang, Sandeep Rao, Adeel Ahmad