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

IPC: G01S7/02 ,  G01S13/58

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.

公开(公告)号：US20240183939A1

公开(公告)日：2024-06-06

申请号：US18420133

申请日：2024-01-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujaata Ramalingam ,  Karthik Subburaj ,  Pankaj Gupta ,  Anil Varghese Mani ,  Karthik Ramasubramanian ,  Indu Prathapan

IPC: G01S7/292 ,  G01S7/40 ,  G01S13/524

CPC classification number: G01S7/2922 ,  G01S7/4004 ,  G01S13/5246

Abstract: In a system a register stores data samples and includes a cell under test (CUT) in which a test data sample is stored, a first window of multiple cells on one side of the CUT, and a second window of multiple cells on the other side of the CUT. A rank determining circuit receives an incoming data sample entering the register and data sample(s) currently in cell(s) in the first window of multiple cells. A sorted index array stores ranks of data samples that are stored in the register. Comparing and selection circuitry selects a Kth smallest index from the sorted index array and a corresponding data sample from the register. A target comparator receives the test data sample and the data sample corresponding to the Kth smallest index of the sorted index array, and outputs a target detection signal.

公开(公告)号：US11709221B2

公开(公告)日：2023-07-25

申请号：US17013910

申请日：2020-09-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anil Varghese Mani

IPC: G01S7/02 ,  G01S7/35 ,  G01S13/931 ,  H04B1/02 ,  H04B1/06

CPC classification number: G01S7/023 ,  G01S7/354 ,  G01S13/931 ,  G01S2013/9318 ,  G01S2013/9321 ,  H04B1/02 ,  H04B1/06

Abstract: An apparatus comprises a transmitter that transmits a signal, a receiver, a multiplier, and a signal shifter included in one of the transmitter and the receiver. The receiver receives a reflected signal comprising an interferer signal with at least one of an amplitude noise or a phase noise and generates a baseband signal comprising a real portion and an imaginary portion. The multiplier multiplies the imaginary portion by a value β chosen based on a power difference α between the amplitude noise and the phase noise, resulting in a modified baseband signal. The signal shifter shifts the interferer signal and the modified baseband signal. An estimator can process the reflected signal and estimate a frequency and phase of the interferer signal for the signal shifter. The value β can be represented as:




β
=

1

α
2






where α represents the power difference between the amplitude noise and the phase noise.

公开(公告)号：US11927689B2

公开(公告)日：2024-03-12

申请号：US17351750

申请日：2021-06-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujaata Ramalingam ,  Karthik Subburaj ,  Pankaj Gupta ,  Anil Varghese Mani ,  Karthik Ramasubramanian ,  Indu Prathapan

IPC: G01S7/292 ,  G01S7/40 ,  G01S13/524

CPC classification number: G01S7/2922 ,  G01S7/4004 ,  G01S13/5246

Abstract: A system includes a shift register to store data samples, where the shift register includes a cell under test (CUT), a left guard cell, a right guard cell, a left window, and a right window. The system includes two sets of comparators to compare incoming data samples with data samples in the left window and the right window to compute ranks of the incoming data samples. The system includes a sorted index array to store a rank of the data samples in the shift register. The system includes a selector to select a Kth smallest index from the sorted index array and its corresponding data sample from the shift register. The system includes a target comparator, where the first comparator input receives a data sample from the CUT and the second comparator input receives a Kth smallest data sample, and the comparator output indicates a CFAR target detection.