公开(公告)号：US20180113193A1

公开(公告)日：2018-04-26

申请号：US15726433

申请日：2017-10-06

Applicant: Infineon Technologies AG

Inventor： Mario HUEMER ,  Alexander MELZER ,  Alexander ONIC ,  Rainer STUHLBERGER

IPC: G01S7/28 ,  G01S7/35 ,  H03B1/04 ,  G01S7/40 ,  G01S13/34 ,  G01S7/03

CPC classification number: G01S7/2813 ,  G01S7/038 ,  G01S7/35 ,  G01S7/4056 ,  G01S13/34 ,  G01S13/343 ,  G01S13/931 ,  G01S2007/028 ,  G01S2007/406 ,  G01S2007/4065 ,  H03B1/04 ,  H03B2202/073

Abstract: A method for cancelling phase noise in a radar signal is described herein. In accordance with one embodiment, the method includes transmitting an RF oscillator signal, which represents a local oscillator signal including phase noise, to a radar channel and receiving a respective first RF radar signal from the radar channel. The first RF radar signal included at least one radar echo of the transmitted RF oscillator signal. Further, 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 a second RF radar signal. The second RF radar signal is modulated by a modulation signal thus generating a frequency-shifted RF radar signal. Further, the method includes subtracting the frequency-shifted RF radar signal from the first RF radar signal.

公开(公告)号：US20190242972A1

公开(公告)日：2019-08-08

申请号：US16266523

申请日：2019-02-04

Applicant: Infineon Technologies AG

Inventor： Alexander MELZER ,  Mario HUEMER ,  Paul MEISSNER ,  Fisnik SULEJMANI ,  Matthias WAGNER

IPC: G01S7/292 ,  G01S13/12 ,  G01S13/534

CPC classification number: G01S7/2923 ,  G01S7/023 ,  G01S7/35 ,  G01S7/354 ,  G01S7/36 ,  G01S7/40 ,  G01S13/12 ,  G01S13/34 ,  G01S13/343 ,  G01S13/534 ,  G01S13/93 ,  G01S13/931 ,  G01S2007/356

Abstract: A radar method is described herein. In accordance with one embodiment the method includes receiving a plurality of chirp echoes of transmitted radar signals, generating a digital signal based on the plurality of chirp echoes, and calculating a range map based on the digital signal. The range map includes a plurality of values, each value is represented by an amplitude value and a phase value, and each value is associated with one frequency bin of a set of frequency bins and one chirp echo of the plurality of chirp echoes. The method further includes identifying chirp echoes which are affected by interference and determining, for one or more selected frequency bins, corrected phase values based on phase values that are associated with chirp echoes not identified as affected by interference.

公开(公告)号：US20190235051A1

公开(公告)日：2019-08-01

申请号：US16259160

申请日：2019-01-28

Applicant: Infineon Technologies AG

Inventor： Alexander MELZER ,  Michael GERSTMAIR ,  Mario HUEMER ,  Alexander ONIC ,  Christian SCHMID ,  Rainer STUHLBERGER

IPC: G01S7/40 ,  G01S7/35

CPC classification number: G01S7/40 ,  G01S7/03 ,  G01S7/032 ,  G01S7/354 ,  G01S7/4017 ,  G01S13/343 ,  G01S13/87 ,  G01S13/931

Abstract: A method is described that, according to one exemplary embodiment, involves the following: generating a first radio frequency (RF) signal by a first RF oscillator and a second RF signal by a second RF oscillator, mixing the first RF signal and the second RF signal by a mixer to generate a mixer output signal, digitizing the mixer output signal to generate a digitized signal, and calculating an estimate for a power spectral density of the mixer output signal from the digitized signal. Based on the estimate for the power spectral density of the mixer output signal, an estimate for a noise power spectral density characterizing the noise contained in the first and the second RF signals is calculated.

公开(公告)号：US20170153318A1

公开(公告)日：2017-06-01

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

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.