公开(公告)号：US20230305132A1

公开(公告)日：2023-09-28

申请号：US17948227

申请日：2022-09-20

Applicant: Texas Instruments Incorporated

Inventor： Karthik Subburaj ,  Kameswaran Vengattaramane ,  Shankar Ram Narayana Moorthy ,  Vashishth Dudhia

IPC: G01S13/38 ,  G01S7/35 ,  G01S7/40

CPC classification number: G01S13/38 ,  G01S7/356 ,  G01S7/4008

Abstract: In described examples, a frequency modulated continuous wave (FMCW) radar system includes an FMCW signal generator, a number N transmitters, N phase shifters, multiple receivers, and a processor. The FMCW signal generator is configured to generate FMCW chirps. Different ones of the phase shifters have different respective base phase shifts selected in response to N. The transmitter is configured to transmit the phase shifted FMCW chirps. The receivers are configured to receive an FMCW chirp reflected by an object in range of the FMCW radar system. The processor is configured to determine a location of the object in range in response to the received FMCW chirp.

公开(公告)号：US20250111007A1

公开(公告)日：2025-04-03

申请号：US18901256

申请日：2024-09-30

Applicant: Texas Instruments Incorporated

Inventor： Kanish B ,  Karthik Subburaj ,  Karthik Ramasubramanian ,  Anushree Pendharkar ,  Kameswaran Vengattaramane ,  Atman Kar

IPC: G06F17/14 ,  G06F7/50 ,  G06F7/523

Abstract: In described examples, an integrated circuit (IC) includes a fast Fourier transform (FFT) engine, a first memory, a second memory, a conjugate symmetric combiner (CSC), and a control circuit coupled to control them. The first and second memories are coupled to the FFT engine, and the CSC is coupled to the first and second memories and the FFT engine. The FFT engine receives and processes a first stream of samples to generate a second stream of samples. In a first phase, the FFT engine provides a first portion of the second stream of samples to the first memory. In a second phase, the FFT engine provides a second portion of the second stream of samples to the second memory, the first memory provides the first portion of the second stream of samples to the CSC, and the CSC responsively generates a third stream of samples.

公开(公告)号：US12007462B2

公开(公告)日：2024-06-11

申请号：US17351654

申请日：2021-06-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik Subburaj ,  Karthik Ramasubramanian ,  Shailesh Joshi ,  Kameswaran Vengattaramane ,  Indu Prathapan

IPC: G01S13/04 ,  G01S7/35 ,  G06F16/22 ,  G06F16/901 ,  G06F17/14

CPC classification number: G01S13/04 ,  G01S7/35 ,  G06F16/2264 ,  G06F16/9017 ,  G06F17/142

Abstract: A system includes a memory configured to store a two-dimensional data structure that includes radar data arranged such that radar data of a first transmitter is separated from radar data of a second transmitter by a Doppler offset in the two-dimensional data structure. The system also includes a data fetch mechanism that includes a lookup table (LUT) applied on either of two dimensions. The lookup table is configured to store a data fetch location in the two-dimensional data structure, where the data fetch location indicates a location from which to fetch a subset of the radar data from the two-dimensional data structure and the data fetch mechanism is configured to fetch the subset of the radar data from the two-dimensional data structure based on the LUT. The system includes a processor configured to perform a fast Fourier transform (FFT) on the fetched subset of the radar data.