公开(公告)号：US20240094335A1

公开(公告)日：2024-03-21

申请号：US18526250

申请日：2023-12-01

Applicant: Texas Instruments Incorporated

Inventor： Shankar Ram NARAYANA MOORTHY ,  Karthik SUBBURAJ ,  Shailesh JOSHI ,  Piyush SONI

IPC: G01S7/28 ,  G01S7/35

CPC classification number: G01S7/2813 ,  G01S7/352

Abstract: Non-transitory computer-readable mediums and systems are provided in which a portion of each chirp of a series of chirps is held at an offset frequency for a period of time, and in which the offset frequency, the period of time or both is varied or dithered across the chirps of the series of chirps. The portion of a chirp that is held at an offset frequency for a period of time may be a non-active portion of the chirp, during which the chirp is not sampled. In some implementations, the portion of a chirp that is held at an offset frequency for a period of time is during a falling portion of the chirp, which may be at the beginning of the falling portion, or at the end of the falling portion immediately before a rise portion of a succeeding chirp.

公开(公告)号：US20230017031A1

公开(公告)日：2023-01-19

申请号：US17498342

申请日：2021-10-11

Applicant: Texas Instruments Incorporated

Inventor： Shankar Ram NARAYANA MOORTHY ,  Karthik SUBBURAJ ,  Shailesh JOSHI ,  Piyush SONI

IPC: G01S7/28 ,  G01S7/35

Abstract: A non-transitory computer-readable storage device stores machine instructions which, when executed by a processor, cause the processor to determine a chirp period Tc for radar chirps in a radar frame. The chirp period Tc comprises a rising period Trise and a falling period Tfall. The processor determines, for each radar chirp in the radar frame, a corresponding randomized frequency characteristic during Tfall, and causes a radar sensor circuit to generate the radar chirps in the radar frame based on Tc, Trise, Tfall, and the corresponding randomized frequency characteristics. In some implementations, the machine instructions to determine the corresponding randomized frequency characteristic comprise machine instructions to determine a frequency step having a frequency f_step and a period Tstep. At least one of the frequency f_step and the period Tstep is dithered across radar chirps in the radar frame.