EP4634689A1 - Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors und eine frequenzteileranordnung für eine derartige prüfvorrichtung - Google Patents
Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors und eine frequenzteileranordnung für eine derartige prüfvorrichtungInfo
- Publication number
- EP4634689A1 EP4634689A1 EP23820807.8A EP23820807A EP4634689A1 EP 4634689 A1 EP4634689 A1 EP 4634689A1 EP 23820807 A EP23820807 A EP 23820807A EP 4634689 A1 EP4634689 A1 EP 4634689A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- frequency
- received signal
- test device
- reception signal
- 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.)
- Pending
Links
Classifications
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- 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
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- 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
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
-
- 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
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
-
- 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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0044—Control loops for carrier regulation
- H04L2027/0046—Open loops
- H04L2027/0051—Harmonic tracking
Definitions
- Test device for testing a distance sensor operating with electromagnetic waves and a frequency divider arrangement for such a test device
- the invention relates to a test device for testing a distance sensor operating with electromagnetic waves, with a receiving element for receiving an electromagnetic free space wave as a received signal with a received frequency and a signal bandwidth, with a radiating element for radiating an electromagnetic output signal, wherein in simulation mode the received signal or a received signal derived from the received signal is converted into a sampled signal by means of an analog/digital converter, the sampled signal is time-delayed by a signal processing unit to a time-delayed sampled signal, the time-delayed sampled signal is converted into a simulated reflection signal by means of a digital/analog converter, wherein the simulated reflection signal or a simulated reflection signal derived from the simulated reflection signal is radiated as an output signal via the radiating element.
- the invention also relates to a frequency divider arrangement for the aforementioned test device.
- Test devices of the aforementioned type for testing distance sensors are known from various fields of technology, for example from the field of control unit development and control unit testing, in particular in the automotive sector; reference is made, for example, to WO 2020/165191 Al.
- Another field of application is end-of-line test benches, i.e. devices that are used to check products at the end of a production line, in this case the testing of distance sensors (EP 4109125 Al).
- distance sensors that work with electromagnetic waves; radar sensors are predominantly used in the automotive sector. In principle, however, distance sensors that work with electromagnetic waves in a different frequency range, for example in the visible light range, or that work with electromagnetic radiation sources that emit electromagnetic waves with a long coherence length, such as in laser applications, can also be tested.
- Distance sensors of the type considered here basically work in such a way that the electromagnetic waves they emit are reflected by a reflection object in the radiation range of the distance sensor.
- the distance sensor receives the reflected electromagnetic waves and determines the distance to the object from the travel time of the electromagnetic waves.
- the signal travel time can be determined directly (time-of-flight measurement), but it is often done indirectly via clever signal evaluation.
- very short sensor signals are often used, i.e. pulses
- extended transmission signals are usually used and the desired distance information is obtained from the frequency of the mixed signal of the transmitted signal and the received reflection signal. Examples of extended transmission signals are frequency-modulated continuous wave signals.
- the test device is positioned in the distance sensor's radiation area to test it.
- the test device receives the free-space waves emitted by the distance sensor and delays this reception signal with its signal processing unit according to a predetermined time delay and then radiates the time-delayed signal via its radiation element in the direction of the distance sensor to be tested, which gives the distance sensor the impression of a reflected object that has been removed according to the set time delay.
- the ability to set a time delay is a minimum requirement for the test device, as this allows the basic property of the distance of the reflected object to be simulated.
- Advanced test devices can also simulate radial motion components relative to the distance sensor. Due to the Doppler effect, the reflection signals are in this case frequency-shifted compared to the frequency of the transmitted signal emitted by the distance sensor. Modern test devices are able to make appropriate frequency shifts of the simulated reflection signal compared to the frequency of the received signal in order to map predetermined radial motion components in the simulated reflection signal. Even more advanced techniques can also simulate complex Doppler signatures with multiple motion components.
- the simulated reflection signal also undergoes intermediate signal processing on the way to the emitting element, so that strictly speaking, it is not the simulated reflection signal that is emitted as the output signal, but rather the simulated reflection signal derived from the simulated reflection signal.
- the hardware requirements for the test device and thus for the signal processing unit are extremely high.
- Distance sensors often work in the range of 80 GHz with a bandwidth of several GHz.
- a concrete example of a common application for a test device for testing a distance sensor is a reception frequency of 79 GHz (center frequency) with a bandwidth of 4 GHz, so that the reception signal to be processed is in a range of 77 to 81 GHz. It is obvious that capturing the reception signal and processing the reception signal (sampling by analog/digital conversion, time delay, frequency shift, applying complex Doppler signatures, digital/analog conversion) is extremely demanding, since the processing times are in the nano- to microsecond range.
- the simulated reflection signal has a signal amplitude that matches the size of the reflection object to be simulated.
- the simulated reflection signal should have an amplitude which corresponds to the radar cross-section of the object at a certain distance, but for this the received signal amplitude must also be known.
- the object of the present invention is to design and develop the described test device in such a way that the required signal processing is simplified.
- the previously derived task is solved in the test device described at the beginning in that the received signal is divided into a first partial received signal and a second partial received signal using a signal divider, wherein at least the second partial received signal has the amplitude information of the received signal.
- both partial received signals usually have the amplitude information of the received signal. If it is said that the second partial received signal has the amplitude information of the received signal, then the second partial received signal does not have to have the amplitude of the received signal, but the amplitude of the second partial received signal is in any case in a certain ratio to the amplitude of the received signal, so that the information about the amplitude of the received signal can be determined by evaluating the amplitude of the second partial received signal.
- the first partial received signal is converted by a frequency divider into a frequency-divided received signal that no longer contains the amplitude information of the received signal.
- the fact that the frequency-divided received signal no longer contains the amplitude information of the received signal is because frequency dividers usually work digitally and usually convert a sine wave into a square wave of the corresponding frequency, the amplitude of which, however, only changes back and forth between a minimum value and a maximum value.
- the use of the frequency divider has two effects. Firstly, the reception frequency is reduced by division according to the division factor of the frequency divider. Secondly, the bandwidth of the reception signal is reduced by the division factor of the frequency divider. Both effects mean that the subsequent signal processing (analog/digital conversion, digital signal processing by the signal processing unit and digital/analog conversion) is considerably simplified and It is also more cost-effective to implement because slower components can be used.
- the amplitude information of the received signal is obtained from the second partial received signal using an amplitude detector.
- the second partial received signal it is not the frequency of the received signal that is of interest, but only its amplitude, which usually changes much more slowly than the oscillations of the received signal. Essentially, envelope detection is carried out.
- a modulator is then used to generate a frequency-divided received signal with the amplitude information of the received signal by modulating the amplitude information obtained from the second partial received signal onto the frequency-divided received signal without amplitude information.
- the frequency-divided received signal with the modulated amplitude information is then the received signal derived from the received signal, which is then further processed digitally.
- the test device further provides that the simulated reflection signal is converted by a frequency multiplier to the signal derived from the simulated reflection signal, i.e. the signal whose frequency was reduced on the input side by the frequency divider is now increased again on the output side.
- the signal divider is implemented as a resistive power divider.
- This electrically passive solution is easy to implement and very reliable. It is basically possible to It is also possible to use active signal splitters or signal splitters based on a different principle.
- a further advantageous design of the test device is characterized by the fact that the frequency divider is implemented digitally, in particular on the basis of bistable flip-flops. This solution is also reliable and simple and is also available as an integrated circuit. By connecting flip-flops in series, frequency dividers with a division factor that corresponds to the reciprocal of a power of two can be easily implemented.
- test device is characterized in that the amplitude detector is implemented with a rectifier and a downstream low-pass filter, in particular with a diode as a rectifier.
- the solution is also characterized in that it is implemented in an electrically passive, simple and reliable manner.
- the division factor of the frequency divider is selected such that the smallest frequency of the frequency-divided received signal is equal to or greater than the signal bandwidth of the received signal multiplied by half the division factor. If the division factor is 1/x and the bandwidth of the received signal is B, then the frequency-divided received signal has a bandwidth of B/x. If the smallest frequency of the frequency-divided received signal is fmin , then the specified design rule is formulaically fmin > B/(2x). This design takes into account that the square-wave signals generated by the frequency division have harmonics with an odd multiple of the fundamental frequency.
- the first harmonic of the smallest frequency of the frequency-divided received signal is in a higher frequency range than the maximum frequency of the frequency-divided received signal and thus outside the frequency-divided bandwidth of the frequency-divided received signal.
- a low-pass filter filters the frequency-divided received signal with the amplitude information so that the harmonic fundamental oscillation of the frequency-divided received signal is obtained as a derived received signal.
- a harmonic signal is generated from a square-wave signal or the harmonic of interest of the fundamental frequency is extracted from a signal with many energy components in harmonics.
- the low-pass filter can also be arranged directly behind the frequency divider, so that a harmonic signal without amplitude information results and this harmonic signal can then be provided with the amplitude information by modulation.
- the cutoff frequency of the low-pass filter is between twice and three times the smallest frequency of the frequency-divided received signal. This is particularly useful if the division factor of the frequency divider is selected as described above.
- a delay element is provided in the signal path between the signal divider via the frequency divider to the modulator and/or between the signal divider via the amplitude detector to the modulator, wherein the delay element has such a delay time that the frequency-divided received signal and the amplitude information are combined at the right time. This compensates for different signal propagation times in the signal paths, starting from the signal divider.
- the multiplication factor of the frequency multiplier corresponds to the reciprocal of the division factor of the frequency divider, whereby the simulated reflection signal is raised again to the reception frequency and the signal bandwidth of the simulated reflection signal is also stretched to the signal bandwidth of the reception signal.
- the frequency multiplier is preferably implemented using a semiconductor component with non-linear transmission behavior, which automatically generates harmonics.
- a diode or a transistor are suitable as simple components.
- the frequency multiplier is then preferably followed by a bandpass filter in order to filter or let through the harmonics in the desired frequency range.
- the received signal is frequency-shifted to lower frequencies using a receiving converter and the signal derived from the simulated reflection signal (i.e. after the frequency multiplier) is shifted to higher frequencies using an output converter, whereby the frequency shifts on the input and output sides are equal, in particular in terms of amount.
- the use of the receiving converter and the output converter does not affect the signal bandwidth, but sets the frequency of the signal band however, down or up.
- the frequency-shifted received signal would then be the input signal of the signal divider, previously referred to as the received signal.
- the object described at the outset is also achieved with a frequency divider arrangement for a test device according to the invention.
- the frequency divider arrangement is characterized in that a received signal is divided by a signal divider into a first partial received signal and a second partial received signal, wherein at least the second partial received signal has the amplitude information of the received signal, that the first partial received signal is converted by a frequency divider into a frequency-divided received signal that no longer has the amplitude information of the received signal, that the amplitude information of the received signal is obtained from the second partial received signal using an amplitude detector, that a frequency-divided received signal with the amplitude information of the received signal is generated using a modulator by modulating the amplitude information obtained from the second partial received signal onto the frequency-divided received signal without amplitude information, thus generating a derived received signal from the received signal.
- the frequency divider arrangement is designed with regard to its components as previously described in connection with the test device.
- Fig. 1 shows schematically a test device for testing a distance sensor operating with electromagnetic waves as known from the prior art
- Fig. 2 schematically shows amplitude spectra of the received signal and the received signal derived from the received signal, also as known from the prior art
- Fig. 3 shows a frequency divider arrangement as implemented in the reception path of the test device according to the invention
- Fig. 4 schematically shows a frequency multiplier in the output path of the test device according to the invention
- Fig. 5 schematically shows another embodiment of a frequency divider arrangement of the test device
- Fig. 6 schematically shows another embodiment of a frequency divider arrangement in the test device
- Fig. 7 shows a schematic of a test device with input and output frequency converter
- Fig. 8 schematically shows amplitude spectra of different signals when using the frequency divider arrangement in the test device.
- Fig. 1 shows a test device 1 known from the prior art for testing a distance sensor 2 that works with electromagnetic waves.
- the distance sensor 2 is, for example, a radar distance sensor as used in the automotive sector.
- the distance sensor 2 emits a free space wave that is reflected by a reflection object and receives the reflection signal. From the time delay, a frequency shift and, if applicable, the signal intensity of the reflection signal, the distance sensor can deduce the distance to the reflection object, radial speed components of the reflection object and, if applicable, the size, reflection properties, etc. of the reflection object; this depends on the design of the distance sensor 2.
- the test device 1 simulates an actual reflection object to the distance sensor 2 to be tested.
- the test device 1 has a receiving element 3 for receiving the electric free space wave emitted by a distance sensor 2 as a reception signal SRX.
- the reception signal SRX has a reception frequency fRx and a signal bandwidth B.
- the test device 1 has a radiation element 4 for radiating an electromagnetic output signal STX.
- the reception signal SRX or a reception signal S'RX derived from the reception signal SRX is converted into a sampled signal by means of an analog/digital converter 5, the sampled signal is time-delayed to a time-delayed sampled signal by means of a signal processing unit 6, and the time-delayed sampled signal is converted to the simulated reflection signal S s im by means of a digital/analog converter 7.
- the simulated reflection signal S s im or a simulated reflection signal S' sim derived from the simulated reflection signal Ssim is then emitted as an output signal STX via the emitting element 4.
- the signal processing unit 6 implements the necessary measures to give the simulated reflection signal all the essential signal properties, i.e. a desired signal delay, a desired frequency shift (or several signal components with different frequency shifts) and, if necessary, also the desired amplitude of the simulated reflection signal Ssim.
- a signal processing 8a upstream on the input side there can be a signal processing 8a upstream on the input side and also a signal processing 8b downstream on the output side to the signal processing of the signal processing unit 6.
- a signal processing 8a upstream on the input side and also a signal processing 8b downstream on the output side to the signal processing of the signal processing unit 6.
- This situation is shown in Fig. 2 using an amplitude spectrum.
- the received signal SRX has a bandwidth B of 4 GHz at a received frequency fRx of 79 GHz.
- the signal bandwidth B therefore extends from 77 GHz to 81 GHz.
- the received signal SRX is mixed down to an intermediate frequency of 4 GHz using a frequency of 75 GHz of a local oscillator, whereby the Signal bandwidth B is maintained.
- the received signal S'RX is derived from the received signal SRX.
- the downstream signal processing 8b on the output side uses a corresponding mixer with which the low-frequency simulated reflection signal S s im is mixed back up to the range of the reception frequency fRx and then emitted as a derived simulated reflection signal S'sim. Since the bandwidth B of the reception signal SRX remains unchanged, the requirements with regard to the sampling of the signal, which depend on the signal bandwidth B, remain unchanged and high.
- Figures 3 to 8 describe various aspects of a test device 1 according to the invention for testing the distance sensor 2 operating with electromagnetic waves and of a frequency divider arrangement 9 according to the invention, which is a component of the test device 1.
- Fig. 3 initially shows a frequency divider arrangement 9, which is part of the signal processing upstream on the input side.
- the received signal SRX is divided by a signal divider 10 into a first partial received signal Si and a second partial received signal S2, with at least the second partial received signal S2 having the amplitude information A of the received signal SRX.
- the signal divider 10 is a resistive power divider, so that the first partial received signal Si also basically has the amplitude information A of the received signal SRX.
- the first partial received signal Si is converted by a frequency divider 11 into a frequency-divided received signal Sif, which no longer has the amplitude information A of the received signal SRX.
- the frequency-divided received signal Sif does not have the amplitude information A because the frequency divider 11 outputs a digital output signal which still has the frequency information but no longer contains the amplitude information of the frequency-divided input signal.
- the amplitude information A of the received signal SRX is obtained from the second partial received signal S2 using an amplitude detector 12.
- the envelope of the second partial received signal S2 is detected.
- a frequency-divided received signal SfA with the amplitude information A of the received signal SRX is generated by a modulator 13 by applying the frequency-divided received signal without amplitude information Sif the amplitude information A obtained from the second partial received signal S2 is modulated.
- the received signal S'RX derived from the received signal SRX is generated.
- the use of the frequency divider 11 has the advantage that not only the received frequency fRx, i.e. the center frequency of the received signal SRX, is reduced by the division factor 1/x of the frequency divider 11, but that the signal bandwidth B of the received signal SRX is also reduced by the same factor, so that the requirements for further signal processing are correspondingly lower.
- Fig. 4 shows a further aspect of the test device 1, namely that the simulated reflection signal S sim is converted by a frequency multiplier 14 to the signal S'sim derived from the simulated reflection signal S s .
- the multiplication factor y of the frequency multiplier 14 is equal to the reciprocal of the division factor 1/x of the frequency divider 11. This exactly cancels out the effects of the frequency divider 11 (reduction of the center frequency and reduction of the bandwidth).
- the frequency divider 11 is implemented digitally, namely on the basis of fast bistable flip-flops.
- the amplitude detector 12 is implemented with a rectifier and a downstream low-pass filter, namely - not shown individually in detail - with a diode as a rectifier.
- Fig. 5 shows that the frequency divider 11 is followed by a low-pass filter 18 which only allows the harmonic fundamental oscillation of the frequency-divided received signal without amplitude information Sif to pass through. In this way, the square-wave signal resulting from the frequency division can be easily converted into a clean sine wave.
- Fig. 6 shows an alternative implementation of the test device 1 or the frequency divider arrangement 9, in which the low-pass filter 18 divides the frequency Received signal with the amplitude information SfASO is filtered so that only the fundamental harmonic of the frequency-divided received signal SfA results as derived received signal S'RX.
- the low-pass filter 18 is designed such that its cutoff frequency is between twice and three times the smallest frequency of the frequency-divided received signal Sif, SfA.
- the embodiments also have in common that the multiplication factor y of the frequency multiplier 14 corresponds to the reciprocal of the division factor x of the frequency divider 11, whereby the frequency shifts as well as the bandwidth reduction and the bandwidth expansion on the input side and the output side cancel each other out.
- test devices 1 in the exemplary embodiments have in common that the frequency multiplier 14 is implemented using a diode to generate harmonic overtones.
- a bandpass filter is connected downstream to filter a harmonic overtone, in this case the one with four times the fundamental frequency.
- Fig. 7 shows a test device 1 in which the received signal SRX is frequency-shifted to low frequencies using a receive converter 15 and in which the output signal of the frequency multiplier 14 is shifted to higher frequencies using an output converter 16, the frequency shifts being equal in magnitude here.
- the receive converter 15 and the output converter 16 are mixers which are supplied with a harmonic signal with a corresponding frequency by a local oscillator 17 to increase and decrease the respective frequency of the input signal.
- the received signal SRX is already frequency-shifted here before it is further processed by the frequency divider arrangement 9 in the manner described. In order not to have to use further identifiers, it is nevertheless referred to as the received signal SRX.
- Fig. 8 shows the amplitude spectrum of various signals that result from using the frequency divider arrangement 9 in the test device 1 according to Fig. 7.
- the received signal SRX has a bandwidth B of 4 GHz at a center frequency of 79 GHz.
- the receive converter 15 is fed by the local oscillator 17 with a mixing frequency of 75 GHz, so that the reduced received signal SRX with the unchanged bandwidth B of 4 GHz in the range from 2 to 6 GHz.
- the bandwidth B is therefore reduced by a factor of 4, i.e. to 1 GHz.
- the limiting frequencies are also reduced by a factor of 4 and are now 0.5 GHz and 1.5 GHz.
- the reduced bandwidth (B/x) received signal S'RX derived from the received signal SRX is easier to handle by the subsequent digital signal processing than a signal with the original, larger bandwidth B. Therefore, the use of less fast power electronic components is possible, which enables the use of less demanding and therefore often cheaper hardware components.
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022133124.5A DE102022133124A1 (de) | 2022-12-13 | 2022-12-13 | Prüfvorrichtung zum Test eines mit elektromagnetischen Wellen arbeitenden Abstandssensors und eine Frequenzteileranordnung für eine derartige Prüfvorrichtung |
| PCT/EP2023/084143 WO2024126139A1 (de) | 2022-12-13 | 2023-12-04 | Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors und eine frequenzteileranordnung für eine derartige prüfvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4634689A1 true EP4634689A1 (de) | 2025-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23820807.8A Pending EP4634689A1 (de) | 2022-12-13 | 2023-12-04 | Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors und eine frequenzteileranordnung für eine derartige prüfvorrichtung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20250306169A1 (de) |
| EP (1) | EP4634689A1 (de) |
| JP (1) | JP2025541268A (de) |
| KR (1) | KR20250120422A (de) |
| CN (1) | CN120344872A (de) |
| DE (1) | DE102022133124A1 (de) |
| WO (1) | WO2024126139A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102024119433A1 (de) * | 2024-07-09 | 2026-01-15 | Dspace Gmbh | Objektsimulator für einen Sensor zur Objektdetektion und Verfahren zum Simulieren eines Objekts |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102016121296A1 (de) * | 2016-11-08 | 2018-05-09 | HELLA GmbH & Co. KGaA | Vorrichtung und Verfahren zum Simulieren von Radarzielen |
| US10509107B2 (en) * | 2017-01-13 | 2019-12-17 | Rohde & Schwarz Gmbh & Co. Kg | Device, system and method for simulating at least one echo signal of an electromagnetic signal |
| JP7277595B2 (ja) | 2019-02-11 | 2023-05-19 | ディスペース ゲー・エム・ベー・ハー | 電磁波で動作する距離センサをテストするための検査装置 |
| US11860301B2 (en) | 2021-06-22 | 2024-01-02 | Dspace Gmbh | Device and method for testing a distance sensor |
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2022
- 2022-12-13 DE DE102022133124.5A patent/DE102022133124A1/de active Pending
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2023
- 2023-12-04 EP EP23820807.8A patent/EP4634689A1/de active Pending
- 2023-12-04 KR KR1020257023385A patent/KR20250120422A/ko active Pending
- 2023-12-04 JP JP2025534491A patent/JP2025541268A/ja active Pending
- 2023-12-04 WO PCT/EP2023/084143 patent/WO2024126139A1/de not_active Ceased
- 2023-12-04 CN CN202380085495.XA patent/CN120344872A/zh active Pending
-
2025
- 2025-06-12 US US19/236,147 patent/US20250306169A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN120344872A (zh) | 2025-07-18 |
| KR20250120422A (ko) | 2025-08-08 |
| DE102022133124A1 (de) | 2024-06-13 |
| WO2024126139A1 (de) | 2024-06-20 |
| JP2025541268A (ja) | 2025-12-18 |
| US20250306169A1 (en) | 2025-10-02 |
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