EP2678943A1 - Vorrichtung mit einem spannungsgesteuerten oszillator und einer schaltungsanordnung zur eigenkalibrierung - Google Patents
Vorrichtung mit einem spannungsgesteuerten oszillator und einer schaltungsanordnung zur eigenkalibrierungInfo
- Publication number
- EP2678943A1 EP2678943A1 EP11801650.0A EP11801650A EP2678943A1 EP 2678943 A1 EP2678943 A1 EP 2678943A1 EP 11801650 A EP11801650 A EP 11801650A EP 2678943 A1 EP2678943 A1 EP 2678943A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- voltage
- signal
- low
- calibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
Definitions
- the invention relates to a device, in particular a radar sensor, for.
- a device for a motor vehicle,
- each value of a nominal frequency is assigned a voltage value of the voltage intended for controlling the oscillator
- the means for calibration have a means for forming a frequency difference between a frequency and the nominal frequency corresponding to the voltage set at the oscillator.
- the invention further relates to a method for calibrating such a device.
- Motor vehicles are more and more equipped with radar systems to detect the distance of objects to the motor vehicle and the relative speed of objects to the motor vehicle.
- the determined distances and relative speeds can be used in various driver assistance systems.
- the driver assistance systems can be, for example, an automatic headlight range control, automatic selection of the light distribution, automatic adjustment of vertical or horizontal cut-off lines, brake assistants or else.
- an initially mentioned device with a voltage-controlled oscillator can be used.
- European Patent Publication No. EP 1 325 350 B1 discloses a method and apparatus for determining the distance and relative velocity of an object remote from a motor vehicle.
- the patent proposes an FMFSK (Frequency Modulated Frequency Shift Keying) method.
- This device using the method has a voltage-controlled oscillator with which a plurality of signals to be transmitted are generated.
- Each signal has several sections with different but constant frequency during the section.
- the sections are sent in succession, increasing the frequency of the signal sections of a signal from section to section.
- the sections of a signal are not sent immediately one after the other. Rather, each section of one of the signals is followed by a section of another signal.
- the change between the signal sections is always in the same order and is repeated in each bar. This results in interleaved signal sections.
- the frequency of the signal is always held.
- phase-locked loop also known as "phase-locked loop” (PLL).
- PLL phase-locked loop
- the phase-locked loop provided for calibration comprises a means for forming a frequency difference, also known as a phase detector, a means for adjusting the voltage
- the devices can not be used to generate radar signals for measuring distance and relative speed, which is not advantageous for the driver assistance systems in which they are used during this time no current data from the street space can be made available. This is where the invention starts.
- the invention is based on the object to change a device of the type mentioned so that no or hardly any measuring cycles are lost for calibration.
- the calculated auxiliary frequency can be used with sufficient accuracy to determine the deviation of the actual frequency from the nominal frequency, for which purpose the means for forming a frequency difference is used.
- the frequency difference which in the view of a control engineer is the control difference, can be used in the device according to the invention to change the voltage values assigned to the setpoint frequencies and thereby to calibrate the device. Methods for calibrating a device according to the invention are specified in claims 9 and 10.
- the low-frequency signal is digital and has a frequency of 0.5 to 1.5 kHz.
- the detection of the period of this low-frequency signal takes about 2 ms with a device according to the invention. From the recorded period can with the means for calculating the high frequency auxiliary frequency by inverse forming and scaling of all divisor values the frequency at 24GHz are calculated. If the calculation is performed with a digital signal processor with eg 150 MHz, then one can achieve an accuracy of the auxiliary frequency of +/- 160 kHz.
- the determination of the frequency difference and the subsequent adjustment of the voltage values assigned to the setpoint frequencies can be effected significantly faster with a device according to the invention than in the prior art.
- the time remaining between two measuring cycles can be used to calibrate a device according to the invention. Thereby no time is lost for the measuring cycles.
- the measurement can be done continuously.
- the actual frequency of 24 GHz can be reduced to 1 kHz.
- the signal thus generated can be processed by a commercially available digital signal processor.
- At least one of the frequency dividers or the frequency divider may be a frequency divider integrated in an integrated phase locked loop (PLL).
- At least one of the frequency dividers or the frequency divider may also be a frequency divider of a MMIC (Millimeter Monolithic Integrated Circuit).
- At least one of the frequency dividers or the frequency divider may be a frequency divider of a digital signal processor.
- the means for detecting the period of the low-frequency signal may be a counter.
- the counter can be arranged in one or the digital signal processor.
- the means for calculating the auxiliary frequency from the period of the low-frequency signal may be arranged in one or the digital signal processor.
- the means for forming the frequency difference signal can also be arranged in one or the digital signal processor.
- the or a digital signal processor may be suitable and configured to adapt the voltage values assigned to the setpoint frequencies as a function of the control difference.
- the digital signal processor may also be suitable and configured to store the mapping.
- Calibration procedure may include the following steps:
- the detection of the period of the low-frequency signal preferably by means of a counter.
- Fig. 1 is a simplified block diagram of a device according to the invention
- the simple embodiment of a device according to the invention shown in the figure has three integrated circuits, namely a digital-to-analog converter DAU, a millimeter Monolithic Integrated Circuit MMIC and a digital signal processor DSP.
- DAU digital-to-analog converter
- MMIC millimeter Monolithic Integrated Circuit
- DSP digital signal processor
- the digital signal processor DSP has a means for setting a digital voltage value corresponding to a predetermined setpoint frequency f_setpoint, which can be given via an output of the digital signal processor DSP to the digital-to-analog converter DAU.
- the digital-to-analog converter DAU converts the digital voltage signal into an analogue voltage signal.
- This analog signal is applied to an input of the Millimeter Monolithic Integrated Circuit MMIC.
- the input is connected to a voltage controlled oscillator O.
- the voltage-controlled oscillator O generates a high-frequency signal having a frequency corresponding to the voltage value of the applied voltage of, for example, 24 GHz.
- the high-frequency signal is applied to an output of the Millimeter Monolithic Integrated Circuit MMIC and can be tapped there for further use.
- the high-frequency signal is routed to a first frequency divider FT1.
- the output of the first frequency divider FT1 is connected to an output of the millimeter Monolithic Integrated Circuit MMIC.
- the digital and mid-frequency signal generated by the first frequency divider FT1 is fed via a connection from the output of the millimeter monolithic integrated circuit MMIC to an input of the digital signal processor DSP.
- the input is connected to a second frequency divider FT2, with which the medium-frequency signal is converted into a low-frequency signal with a frequency of, for example, 1 kHz.
- the low-frequency signal is supplied to a means for detecting the period of the low-frequency signal in the form of a counter Z.
- the thus determined period duration of the low-frequency signal is supplied by means B for calculating an auxiliary frequency from the period of the low-frequency signal, that forms the reciprocal and calculates an auxiliary frequency f_h by scaling according to the division factors of the first and the second frequency divider, which, subject to errors, corresponds to the actual frequency of the high-frequency signal at the output of the voltage-controlled oscillator.
- the auxiliary frequency f_h and the setpoint frequency f_soll are fed to a means B for forming a frequency difference from the auxiliary frequency and the setpoint frequency f_soll corresponding to the voltage set at the oscillator.
- the frequency difference is fed to a means E for setting the voltage values assigned to the setpoint frequencies as a function of the frequency difference between the auxiliary frequency f_h and the setpoint frequency f_h.
- Z means for detecting the period of the low-frequency signal / counter
- B means for calculating an auxiliary frequency from the period of the low-frequency signal
- D means for forming a frequency difference of the auxiliary frequency and the set voltage at the oscillator setpoint frequency
- E means for setting the voltage values associated with the reference frequencies as a function of the frequency difference between the auxiliary frequency and the nominal frequency
- S means for setting a digital voltage value
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010061041A DE102010061041A1 (de) | 2010-12-06 | 2010-12-06 | Vorrichtung mit einem spannungsgesteuerten Oszillator und Mitteln zur Eigenkalibrierung |
| PCT/EP2011/071709 WO2012076450A1 (de) | 2010-12-06 | 2011-12-05 | Vorrichtung mit einem spannungsgesteuerten oszillator und einer schaltungsanordnung zur eigenkalibrierung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2678943A1 true EP2678943A1 (de) | 2014-01-01 |
Family
ID=45406688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11801650.0A Ceased EP2678943A1 (de) | 2010-12-06 | 2011-12-05 | Vorrichtung mit einem spannungsgesteuerten oszillator und einer schaltungsanordnung zur eigenkalibrierung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9835713B2 (de) |
| EP (1) | EP2678943A1 (de) |
| CN (1) | CN103348595A (de) |
| DE (1) | DE102010061041A1 (de) |
| WO (1) | WO2012076450A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012100427A1 (de) | 2012-01-19 | 2013-07-25 | Hella Kgaa Hueck & Co. | Vorrichtung mit einem spannungsgesteuerten Oszillator und einer Schaltungsanordnung zum Ansteuern des Oszillators |
| CN103235293A (zh) * | 2013-03-25 | 2013-08-07 | 深圳市华儒科技有限公司 | 一种频率校正的方法及装置 |
| DE102015103149B4 (de) * | 2015-03-04 | 2024-06-06 | HELLA GmbH & Co. KGaA | Radarvorrichtung |
| DE102017113730A1 (de) * | 2017-06-21 | 2018-12-27 | Infineon Technologies Ag | Radar-frontend mit hf-oszillator-überwachung |
| TWI698084B (zh) * | 2017-07-14 | 2020-07-01 | 瑞昱半導體股份有限公司 | 振盪器以及控制方法 |
| CN108306640B (zh) * | 2018-01-12 | 2021-05-14 | 中国人民解放军火箭军工程大学 | 一种宽带射频信号生成系统 |
| CN113391273A (zh) * | 2021-06-11 | 2021-09-14 | 广州极飞科技股份有限公司 | 信号生成方法、装置、信号发射设备及可读存储介质 |
| CN113933791B (zh) * | 2021-09-06 | 2022-05-27 | 珠海正和微芯科技有限公司 | 无晶振fmcw雷达收发机装置及频率校准方法 |
| CN113900084B (zh) * | 2021-09-06 | 2022-06-28 | 珠海正和微芯科技有限公司 | 无晶振fmcw雷达收发机系统及频率校准方法 |
| KR20240030741A (ko) | 2022-08-31 | 2024-03-07 | 삼성전자주식회사 | 터치 컨트롤러, 이를 포함하는 터치 스크린 장치 및 터치 컨트롤러의 동작 방법 |
| CN119519695B (zh) * | 2024-10-29 | 2026-02-13 | 北京显芯科技有限公司 | 锁相环电路及显示装置 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830992A1 (de) * | 1988-09-12 | 1990-03-22 | Messerschmitt Boelkow Blohm | Radarhoehenmesser |
| JP2583723B2 (ja) * | 1991-04-18 | 1997-02-19 | エンドレス ウント ハウザー ゲゼルシヤフト ミツト ベシユレンクテル ハフツング ウント コンパニー | 反射ビーム方式による間隔距離測定のための方法及び装置 |
| US5867536A (en) * | 1997-02-11 | 1999-02-02 | Hittite Microwave Corporation | Digital synchronization of broadcast frequency |
| US5907263A (en) * | 1997-11-14 | 1999-05-25 | Cirrus Logic, Inc. | Bias current calibration of voltage controlled oscillator |
| WO2000028349A1 (de) * | 1998-11-11 | 2000-05-18 | Siemens Aktiengesellschaft | Verfahren zur detektion und korrektur von nichtlinearitäten hochfrequenter, spannungsgesteuerter oszillatoren |
| US6473598B1 (en) * | 2000-02-15 | 2002-10-29 | Fareed Sepehry-Fard | Most cost-effective asmmic-based universal microwave and millimeter wave transceiver |
| DE10050278B4 (de) * | 2000-10-10 | 2005-06-02 | S.M.S., Smart Microwave Sensors Gmbh | Verfahren und Vorrichtung zur Bestimmung von Abstand und Relativgeschwindigkeit eines entfernten Objektes |
| JP2003028951A (ja) * | 2001-07-11 | 2003-01-29 | Fujitsu Ten Ltd | レーダ装置 |
| JP4434906B2 (ja) * | 2004-10-01 | 2010-03-17 | 三洋電機株式会社 | 発振周波数制御回路 |
| TWI312613B (en) * | 2005-10-06 | 2009-07-21 | Novatek Microelectronics Corp | Calibration circuit and operation method for voltage-controlled oscillator |
| GB0523676D0 (en) * | 2005-11-21 | 2005-12-28 | Plextek Ltd | Radar system |
| DE102006009644A1 (de) * | 2006-01-04 | 2007-07-05 | Biotronik Crm Patent Ag | Phasenregelkreis |
| US7898344B2 (en) * | 2006-09-12 | 2011-03-01 | Fujitsu Limited | Phase-locked oscillator and multi-radar system using same |
| US7917799B2 (en) * | 2007-04-12 | 2011-03-29 | International Business Machines Corporation | Method and system for digital frequency clocking in processor cores |
| US7746182B2 (en) * | 2007-11-02 | 2010-06-29 | Texas Instruments Incorporated | Systems and methods for voltage controlled oscillator calibration |
| US20090167389A1 (en) * | 2007-12-31 | 2009-07-02 | Chipidea Microelectronica S.A. | Voltage-Controlled Oscillator |
-
2010
- 2010-12-06 DE DE102010061041A patent/DE102010061041A1/de not_active Withdrawn
-
2011
- 2011-12-05 WO PCT/EP2011/071709 patent/WO2012076450A1/de not_active Ceased
- 2011-12-05 US US13/981,513 patent/US9835713B2/en not_active Expired - Fee Related
- 2011-12-05 CN CN201180066525XA patent/CN103348595A/zh active Pending
- 2011-12-05 EP EP11801650.0A patent/EP2678943A1/de not_active Ceased
Non-Patent Citations (3)
| Title |
|---|
| FORSTNER H P ET AL: "A 77GHz 4-channel automotive radar transceiver in SiGe", RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM, 2008. RFIC 2008. IEEE, IEEE, PISCATAWAY, NJ, USA, 17 June 2008 (2008-06-17), pages 233 - 236, XP031284324, ISBN: 978-1-4244-1808-4 * |
| JAHN M ET AL: "Highly integrated 79, 94, and 120-GHz SiGe radar frontends", MICROWAVE SYMPOSIUM DIGEST (MTT), 2010 IEEE MTT-S INTERNATIONAL, IEEE, PISCATAWAY, NJ, USA, 23 May 2010 (2010-05-23), pages 1324 - 1327, XP031714354, ISBN: 978-1-4244-6056-4 * |
| See also references of WO2012076450A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012076450A1 (de) | 2012-06-14 |
| US9835713B2 (en) | 2017-12-05 |
| US20140145874A1 (en) | 2014-05-29 |
| CN103348595A (zh) | 2013-10-09 |
| DE102010061041A1 (de) | 2012-06-06 |
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