公开(公告)号：US20210026005A1

公开(公告)日：2021-01-28

申请号：US17068976

申请日：2020-10-13

Applicant: Texas Instruments Incorporated

Inventor： Sachin Bharadwaj ,  Karthik Subburaj ,  Sriram Murali

IPC: G01S13/44 ,  G01S13/30 ,  G01S7/40 ,  G06K9/32 ,  G01S13/90 ,  G06K9/52

Abstract: A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.

公开(公告)号：US20190004167A1

公开(公告)日：2019-01-03

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 ,  G01S13/34 ,  G01S7/35 ,  G01S13/93

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.

公开(公告)号：US20180156910A1

公开(公告)日：2018-06-07

申请号：US15638106

申请日：2017-06-29

Applicant: Texas Instruments Incorporated

Inventor： Sachin Bharadwaj ,  Karthik Subburaj ,  Sriram Murali

IPC: G01S13/44 ,  G01S13/30 ,  G01S7/40 ,  G06K9/32 ,  G01S13/90

Abstract: A radar system is provided that includes transmission signal generation circuitry, a transmit channel coupled to the transmission generation circuitry to receive a continuous wave test signal, the transmit channel configurable to output a test signal based on the continuous wave signal in which a phase angle of the test signal is changed in discrete steps within a phase angle range, a receive channel coupled to the transmit channel via a feedback loop to receive the test signal, the receive channel including an in-phase (I) channel and a quadrature (Q) channel, a statistics collection module configured to collect energy measurements of the test signal output by the I channel and the test signal output by the Q channel at each phase angle, and a processor configured to estimate phase and gain imbalance of the I channel and the Q channel based on the collected energy measurements.

公开(公告)号：US20160061942A1

公开(公告)日：2016-03-03

申请号：US14470414

申请日：2014-08-27

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Rao ,  Karthik Subburaj ,  Brian Ginsburg ,  Karthik Ramasubramanian ,  Jawaharlal Tangudu ,  Sachin Bharadwaj

IPC: G01S13/02 ,  G01S13/58 ,  G01S7/35

CPC classification number: G01S13/583 ,  G01S7/35 ,  G01S13/343 ,  G01S2013/9314

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.

Abstract translation: 本公开提供了一种用于估计障碍物的范围的雷达装置。 雷达装置包括产生第一斜坡段和第二斜坡段的本地振荡器。 第一斜坡段和第二斜坡段各自包括起始频率，第一频率和第二频率。 当第一斜坡段的斜率和第二斜坡段的斜率相等且为正时，第二斜坡段的第一频率等于或大于第一斜坡段的第二频率。 当第一斜坡段的斜率和第二斜坡段的斜率相等且为负时，第二斜坡段的第一频率等于或小于第一斜坡段的第二频率。