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97 条记录 (耗时 0.033 秒)

    Dynamic IQ mismatch correction in FMCW radar
    51.
    发明授权
    Dynamic IQ mismatch correction in FMCW radar 有权

    公开(公告)号：US11428777B2

    公开(公告)日：2022-08-30

    申请号：US16208276

    申请日：2018-12-03

    申请人： Texas Instruments Incorporated

    发明人： Pankaj Gupta ,  Sriram Murali ,  Karthik Ramasubramanian

    IPC分类号： G01S7/35 ,  G01S13/34 ,  H03D1/22 ,  G01S7/40 ,  H03D7/16 ,  H03D3/00 ,  G01S13/931

    摘要： A FMCW radar receiver includes a LO providing a chirped LO signal, an in-phase (I) channel for outputting I-data and a quadrature (Q) channel for outputting Q-data. A dynamic correction parameter generator generates IQ phase correction values (P[n]s) and IQ gain correction values (G[n]s) based on a frequency slope rate of the chirped LO signal for generating during intervals of chirps including a first sequence of P[n]s and G[n]s during a first chirp and a second sequence of P[n]s and G[n]s during a second chirp. An IQ mismatch (IQMM) correction circuit has a first IQMM input coupled to receive the I-data and a second IQMM input receiving the Q-data, and the P[n]s and G[n]s. During the first chirp the IQMM correction circuit provides first Q′-data and first I′-data and during the second chirp the IQMM correction circuit provides at least second Q′-data and second I′-data.

    MULTIPLE CHIRP GENERATION IN A RADAR SYSTEM
    53.
    发明申请
    MULTIPLE CHIRP GENERATION IN A RADAR SYSTEM 有权

    公开(公告)号：US20220137182A1

    公开(公告)日：2022-05-05

    申请号：US17574680

    申请日：2022-01-13

    申请人： TEXAS INSTRUMENTS INCORPORATED

    发明人： Tom Altus ,  Jasbir Singh Nayyar ,  Karthik Ramasubramanian ,  Brian Paul Ginsburg

    IPC分类号： G01S7/35 ,  G01S13/34

    摘要： A radar device is provided that includes a timing control component operable to generate, for each chirp of a sequence of chirps according to a set of chirp configuration parameters and a chirp profile for the chirp, chirp control signals to cause the radar device to transmit the chirp, the timing control component having chirp configuration parameter inputs, chirp profile parameter inputs, a chirp address output, and chirp control signal outputs, a chirp configuration storage component having chirp configuration parameter outputs coupled to corresponding inputs of the configuration parameter inputs of the timing control component, a chirp profile address output, and a chirp address input coupled to the chirp address output, and a chirp profile storage component having chirp profile parameter outputs coupled to the chirp profile parameter inputs of the timing control component; and a chirp profile address input coupled to the chirp profile address output.

    Digital compensation for mismatches in a radar system
    55.
    发明授权
    Digital compensation for mismatches in a radar system 有权

    公开(公告)号：US11054499B2

    公开(公告)日：2021-07-06

    申请号：US15004443

    申请日：2016-01-22

    申请人： Texas Instruments Incorporated

    发明人： Sriram Murali ,  Karthik Subburaj ,  Karthik Ramasubramanian

    IPC分类号： G01S7/35 ,  G01S7/40 ,  G01S13/931

    摘要： A radar system is provided that includes a receive channel configured to receive a reflected signal and to generate a first digital intermediate frequency (IF) signal based on the reflected signal, a reference receive channel configured to receive a reflected signal and to generate a second digital IF signal based on the reflected signal, and digital mismatch compensation circuitry coupled to receive the first digital IF signal and the second digital IF signal, the digital mismatch compensation circuitry configured to process the first digital IF signal and the second digital IF signal to compensate for mismatches between the receive channel and the reference receive channel.

    Field monitoring of analog signals in a radar system
    56.
    发明授权
    Field monitoring of analog signals in a radar system 有权

    公开(公告)号：US10768278B2

    公开(公告)日：2020-09-08

    申请号：US15333593

    申请日：2016-10-25

    申请人： Texas Instruments Incorporated

    发明人： Karthik Subburaj ,  Indu Prathapan ,  Karthik Ramasubramanian ,  Brian P. Ginsburg

    IPC分类号： G01S7/40 ,  G01S13/34

    摘要： A FMCW radar system with a built-in self-test (BIST) system for monitoring includes a receiver, a transmitter, and a frequency synthesizer. A FMCW chirp timing engine controls timing of operations at least one radar component. The BIST system includes at least one switchable coupling for coupling a first plurality of different analog signals including from a first plurality of selected nodes in the receiver or transmitter that are all coupled to a second number of monitor analog-to-digital converters (ADCs). The second number is less than (

    Dynamic IQ mismatch correction in FMCW radar
    57.
    发明授权
    Dynamic IQ mismatch correction in FMCW radar 有权

    公开(公告)号：US10145937B2

    公开(公告)日：2018-12-04

    申请号：US15088566

    申请日：2016-04-01

    申请人： Texas Instruments Incorporated

    发明人： Pankaj Gupta ,  Sriram Murali ,  Karthik Ramasubramanian

    IPC分类号： G01S7/35 ,  G01S13/34 ,  G01S13/93 ,  G01S13/00

    摘要： A FMCW radar receiver includes a LO providing a chirped LO signal, an in-phase (I) channel for outputting I-data and a quadrature (Q) channel for outputting Q-data. A dynamic correction parameter generator generates IQ phase correction values (P[n]s) and IQ gain correction values (G[n]s) based on a frequency slope rate of the chirped LO signal for generating during intervals of chirps including a first sequence of P[n]s and G[n]s during a first chirp and a second sequence of P[n]s and G[n]s during a second chirp. An IQ mismatch (IQMM) correction circuit has a first IQMM input coupled to receive the I-data and a second IQMM input receiving the Q-data, and the P[n]s and G[n]s. During the first chirp the IQMM correction circuit provides first Q′-data and first I′-data and during the second chirp the IQMM correction circuit provides at least second Q′-data and second I′-data.