公开(公告)号：USRE49519E1

公开(公告)日：2023-05-02

申请号：US17313352

申请日：2021-05-06

Applicant: Infineon Technologies AG

Inventor： Rainer Stuhlberger ,  Lukas Heschl

IPC: H03L7/099 ,  H03L7/14 ,  H03G3/30 ,  H03L7/081 ,  H03L7/10 ,  G01S7/35 ,  G01S13/34 ,  G01S13/93 ,  H03C3/09 ,  H03L7/093 ,  H03L7/197 ,  G01S13/931

Abstract: A circuit includes an RF oscillator coupled in a phase-locked loop. The phase-locked loop is configured to receive a digital input signal, which is a sequence of digital words, and to generate a feedback signal for the RF oscillator based on the digital input signal. The circuit further includes a digital-to-analog conversion unit that includes a pre-processing stage configured to pre-process the sequence of digital words and a digital-to-analog-converter configured to convert the pre-processed sequence of digital words into the analog output signal. The circuit includes circuitry configured to combine the analog output signal and the feedback signal to generate a control signal for the RF oscillator. The pre-processing stage includes a word-length adaption unit configured to reduce the word-lengths of the digital words and a sigma-delta modulator coupled to the word-length adaption unit downstream thereof and configured to modulate the sequence of digital words having reduced word-lengths.

公开(公告)号：US11269055B2

公开(公告)日：2022-03-08

申请号：US16285863

申请日：2019-02-26

Applicant: Infineon Technologies AG

Inventor： Alexander Onic ,  Bernhard Gstoettenbauer ,  Thomas Langschwert ,  Jochen O. Schrattenecker ,  Rainer Stuhlberger

IPC: G01S7/40 ,  G01S7/35 ,  G01R31/28 ,  G01S13/34

Abstract: A method for testing at least one reception path in a radar receiver is provided. The reception path contains a mixer and a downstream signal processing circuit. The method involves injecting a test signal into the reception path, so that at least a first test tone having a frequency in a passband of the signal processing circuit and a second test tone having a frequency outside the passband are present on the reception path downstream of the mixer. Further, the method involves tapping off a baseband signal, generated by the signal processing circuit, from the reception path, the baseband signal being based on the test signal.

公开(公告)号：US10969463B2

公开(公告)日：2021-04-06

申请号：US16157252

申请日：2018-10-11

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Mario Huemer ,  Paul Meissner ,  Alexander Onic ,  Rainer Stuhlberger ,  Fisnik Sulejmani ,  Matthias Wagner

IPC: G01S7/02 ,  G01S13/34 ,  G01S13/58 ,  G01S13/931 ,  G01S13/00

Abstract: A method for processing radar data is described herein. In accordance with one embodiment, the method includes the calculation of a Range Map based on a digital radar signal received from a radar receiver. The Range Map includes spectral values for a plurality of discrete frequency values and a plurality of discrete time values, wherein each spectral value is represented by at least a first parameter. Further, the method includes applying an operation to at least the first parameters in the Range Map for at least one discrete frequency value to smooth or analyze at least a portion of the Range Map.

公开(公告)号：US10670698B2

公开(公告)日：2020-06-02

申请号：US15358363

申请日：2016-11-22

Applicant: Infineon Technologies AG

Inventor： Alexander Melzer ,  Mario Huemer ,  Alexander Onic ,  Florian Starzer ,  Rainer Stuhlberger

IPC: G01S7/40 ,  G01S7/03 ,  G01S13/34 ,  G01S13/931

Abstract: A method for estimating phase noise of an RF oscillator signal in a frequency-modulated continuous-wave (FMCW) radar system and related radar devices are provided. The method includes applying the RF oscillator signal to an artificial radar target composed of circuitry, which applies a delay and a gain to the RF oscillator signal, to generate an RF radar signal. Furthermore, the method includes down-converting the RF radar signal received from the artificial radar target from an RF frequency band to a base band, digitizing the down-converted RF radar signal to generate a digital radar signal, and calculating a decorrelated phase noise signal from the digital radar signal. A power spectral density of the decorrelated phase noise is then calculated from the decorrelated phase noise signal, and the power spectral density of the decorrelated phase noise is converted into a power spectral density of the phase noise of an RF oscillator signal.

公开(公告)号：US10574367B2

公开(公告)日：2020-02-25

申请号：US16174867

申请日：2018-10-30

Applicant: Infineon Technologies AG

Inventor： Karl Dominizi ,  Oliver Frank ,  Herbert Jaeger ,  Herbert Knapp ,  Hao Li ,  Florian Starzer ,  Rainer Stuhlberger ,  Jonas Kammerer

IPC: H04B17/00 ,  H04B17/21 ,  H04B17/11 ,  H04B17/18 ,  H04B17/10

Abstract: One exemplary embodiment of the present invention relates to a circuit that includes at least one RF signal path for an RF signal and at least one power sensor, which is coupled to the RF signal path and configured to generate a sensor signal representing the power of the RF signal during normal operation of the circuit. The circuit further includes a circuit node for receiving an RF test signal during calibration operation of the circuit. The circuit node is coupled to the at least one power sensor, so that the at least one power sensor receives the RF test signal additionally or alternatively to the RF signal and generates the sensor signal as representing the power of the RF test signal.

公开(公告)号：US10128962B2

公开(公告)日：2018-11-13

申请号：US15145485

申请日：2016-05-03

Applicant: Infineon Technologies AG

Inventor： Karl Dominizi ,  Oliver Frank ,  Herbert Jaeger ,  Herbert Knapp ,  Hao Li ,  Florian Starzer ,  Rainer Stuhlberger ,  Jonas Wursthorn

IPC: H04B17/00 ,  H04B17/21 ,  H04B17/11 ,  H04B17/18 ,  H04B17/10

Abstract: One exemplary embodiment of the present invention relates to a circuit that includes at least one RF signal path for an RF signal and at least one power sensor, which is coupled to the RF signal path and configured to generate a sensor signal representing the power of the RF signal during normal operation of the circuit. The circuit further includes a circuit node for receiving an RF test signal during calibration operation of the circuit. The circuit node is coupled to the at least one power sensor, so that the at least one power sensor receives the RF test signal additionally or alternatively to the RF signal and generates the sensor signal as representing the power of the RF test signal.

公开(公告)号：US10057795B2

公开(公告)日：2018-08-21

申请号：US15610840

申请日：2017-06-01

Applicant: Infineon Technologies AG

Inventor： Florian Starzer ,  Peter Bogner ,  Oliver Frank ,  Guenter Haider ,  Michael Kropfitsch ,  Thomas Sailer ,  Jochen O. Schrattenecker ,  Rainer Stuhlberger

IPC: H04B3/46 ,  H04B17/00 ,  H04Q1/20 ,  H04W24/06 ,  H04B1/16 ,  H03F3/195 ,  H03M1/12

CPC classification number: H04W24/06 ,  H03F3/195 ,  H03F2200/165 ,  H03F2200/333 ,  H03F2200/451 ,  H03M1/1245 ,  H04B1/16

Abstract: A radio frequency (RF) receive circuit is described herein. In accordance with one embodiment, the RF receive circuit includes a mixer configured to receive an RF input signal to down-convert the RF input signal into a base-band or intermediate frequency (IF) band, an analog-to-digital converter (ADC), and a signal processing chain coupled between the mixer and the ADC. The signal processing chain includes at least two circuit nodes. The RF receive circuit further includes an oscillator circuit that is configured to generate a test signal. The oscillator circuit is coupled to the signal processing chain and is configured to selectively feed the oscillator signal into one of the at least two circuit nodes.