EP4469823A1 - Verfahren zum betreiben eines multi-range-radarsystems für ein fahrzeug - Google Patents
Verfahren zum betreiben eines multi-range-radarsystems für ein fahrzeugInfo
- Publication number
- EP4469823A1 EP4469823A1 EP23702259.5A EP23702259A EP4469823A1 EP 4469823 A1 EP4469823 A1 EP 4469823A1 EP 23702259 A EP23702259 A EP 23702259A EP 4469823 A1 EP4469823 A1 EP 4469823A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radar
- radar system
- antenna
- vehicle
- transmitting antenna
- 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
-
- 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
- G01S13/46—Indirect determination of position data
- G01S13/48—Indirect determination of position data using multiple beams at emission or reception
-
- 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
- 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
- G01S13/003—Bistatic radar systems; Multistatic radar 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
- 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
- G01S13/42—Simultaneous measurement of distance and other co-ordinates
- G01S13/424—Stacked beam radar
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2420/00—Indexing codes relating to the type of sensors based on the principle of their operation
- B60W2420/40—Photo, light or radio wave sensitive means, e.g. infrared sensors
- B60W2420/408—Radar; Laser, e.g. lidar
-
- 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
- G01S2013/0236—Special technical features
- G01S2013/0245—Radar with phased array antenna
-
- 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
- G01S2013/9327—Sensor installation details
- G01S2013/93271—Sensor installation details in the front of the vehicles
Definitions
- the invention relates to a method for operating a radar system for a vehicle, in which at least one radar measurement is carried out with the radar system, in which at least one radar signal is transmitted with at least one transmitting antenna element of at least one transmitting antenna arrangement of the radar system and for at least one Receiving-antenna element of at least one receiving-antenna arrangement of the radar system is ready to receive any radar echo signals based on the at least one radar signal, wherein the at least one transmitting-antenna element is controlled according to at least one control scheme.
- the invention relates to a radar system for a vehicle with at least one transmitting antenna arrangement, which has at least one transmitting antenna element for transmitting radar signals, with at least one receiving antenna arrangement which has at least one receiving antenna element for receiving radar echo signals, and with at least one control and detection device for controlling at least the transmitting antenna elements and for detecting radar echo signals received with the at least one receiving antenna element, the radar system having at least one setting means with at least one control scheme for setting at least one main beam axis of the at least one transmitting antenna Arrangement.
- the invention also relates to a vehicle with at least one radar system.
- a radar system and a method for operating a radar system are known from DE 10 2019 134 304 A1.
- the radar system includes a plurality of transmitting antennas, with which radar signals can be sent into a surveillance area of the radar system, a plurality of receiving antennas, with which echoes of radar signals reflected in the surveillance area can be received, and at least one antenna electronics unit, with which the transmission can be transmitted via antenna feed lines. de antennas and the receiving antennas are signal-connected.
- the radar signals can be radiated using a beamforming method and/or a beamsteering method. Additionally or alternatively, a switchover between a beamforming mode with an increased range and a classic MIMO operation with an increased angular resolution can be carried out.
- the radar system and the method can be used in a vehicle, in particular a motor vehicle.
- the invention is based on the object of designing a radar system, a method and a vehicle of the type mentioned at the outset, in which the possible uses of the radar system can be expanded.
- a basic control scheme for the radar system is set at the latest at the beginning of the at least one radar measurement for at least one measurement mode of the radar system, which is specified depending on the intended use of the radar system on the vehicle, with the basic control scheme, a basic main beam axis of the at least one transmitting antenna arrangement is adapted to the intended use of the radar system and the at least one radar measurement is carried out based on the basic control scheme.
- the object can be achieved according to the invention with the method in that the method is suitable for operating at least one radar system according to the invention.
- a basic control scheme is specified depending on the intended use of the radar system on the vehicle.
- the intended use implies a mounting location and/or an alignment of the radar system on the vehicle.
- the basic control scheme is specified such that for at least one measurement mode of the radar system, the basic main beam axis of the at least one transmitting antenna arrangement is aligned with respect to at least one radar system reference range.
- the adjustment only requires a change in the basic control scheme.
- the adjustment can be made by software. This way there is no need to make any hardware changes.
- the at least one radar measurement is carried out based on the basic control scheme. In this case, further control schemes, in particular control schemes based on a MIMO method and/or a beamforming method, can to a certain extent be “superimposed” on the basic control scheme.
- the basic control scheme is set for at least one measurement mode of the radar system.
- a measurement mode is a mode in which the radar system is operated at least part of the time. In particular, this can be a range measurement mode, in particular a short-range measurement mode or a long-range measurement mode.
- the transmission antenna elements are controlled with coherent transmission control signals that have defined phase shifts relative to one another.
- the individual radar signals sent out with the individual transmitting antenna elements are superimposed to form a common radar signal.
- an opening angle of the common radar signal and thus the field of view can be reduced compared to the fields of view of the individual radar signals.
- the energy of the individual radar signals can be bundled and the range of the combined radar signal can be increased.
- a direction of the main beam axis of the common radar signal can be changed by changing the phase shifts accordingly.
- the main beam axis defines the propagation direction of the joint radar signal and thus the field of view.
- the individual radar signals of the individual transmitting antenna elements are encoded differently, so that the signal paths of the individual radar signals can be evaluated independently by the individual transmitting antenna elements. In this way, a higher angular resolution can be achieved compared to the beamforming method. There is no additional focusing of the transmission power, which means that a shorter range is achieved than with the beamforming method.
- the basic main beam axis is the axis of the at least one transmission antenna arrangement, starting from which further adjustments of the direction of the main beam axis can be made in a radar measurement.
- the basic main beam axis can be aligned in such a way that, in the case of a vehicle, it points in the direction of travel or against the direction of travel.
- the radar system can be used in vehicles, in particular motor vehicles.
- the radar system can advantageously be used in land vehicles, in particular passenger cars, trucks, buses, motorcycles or the like, aircraft, in particular drones, and/or water vehicles.
- the radar system can also be used in vehicles that can be operated autonomously or at least partially autonomously.
- the radar system can advantageously be connected to at least one electronic control device of a vehicle or a machine, in particular a driver assistance system and/or a chassis control system and/or a driver information device and/or a parking assistance system and/or a gesture recognition system or the like, or be part of one. In this way, at least some of the functions of the vehicle can be carried out autonomously or partially autonomously.
- the radar system can be used to detect stationary or moving objects, in particular vehicles, people, animals, plants, obstacles, bumps in the roadway, in particular potholes or stones, roadway boundaries, traffic signs, open spaces, in particular parking spaces, precipitation or the like, and/or movements and/or gestures are used.
- At least two transmitting antenna elements of at least one transmitting antenna arrangement can be controlled with respective transmission control signals for the transmission of respective individual radar signals that are coherent with one another and are superimposed to form the at least one radar signal, with the basic control scheme for the radar system has a basic phase shift, which can also be zero, between the respective transmission Control signals for the at least two transmitting antenna elements is specified.
- the basic control scheme for the radar system has a basic phase shift, which can also be zero, between the respective transmission Control signals for the at least two transmitting antenna elements is specified.
- the main beam axis of the superimposed radar signal composed of the individual radar signals can be changed, in particular pivoted.
- the basic main beam axis can be adjusted with the basic phase shift.
- a phase shift in particular a basic phase shift, can be set between the respective transmit control signals by means of at least one phase shifter and/or a phase shift linearly proportional to a distance between the at least two transmit antenna elements can be set.
- Phase shifts can be easily set using phase shifters. Phase shifts that are linearly proportional to the distances between the at least two transmitting antenna elements allow constructive superimposition of individual radar signals.
- At least one basic control scheme can be set with at least one application variable characterizing an intended use, the at least one application variable being stored in a control device for the radar system, in particular a control device of the radar system, at the latest when the radar system is installed on the vehicle.
- a control device for the radar system in particular a control device of the radar system
- at least one basic control scheme can be set in a control device for the radar system, in particular a control device of the radar system.
- the at least one basic control scheme can be further processed by software with the control device.
- the basic control scheme can advantageously be stored in a storage medium of the control device. In this way, the basic control scheme can be easily made available to the controller.
- the basic main beam axis can be adapted to the intended use with the basic control scheme in a long-range measurement mode of the radar system and/or the radar system is operated alternately or at least partially overlapping in time in different range measurement modes, in particular a long-range measurement mode and a short-range measurement mode, and/or at least one of the transmitting antenna elements is controlled in several different range measurement modes for transmitting radar signals and/or readiness to receive echo signals is established for a plurality of receiving-antenna elements of at least one receiving-antenna arrangement.
- specifying the direction of the basic main beam axis is particularly advantageous, since in this measurement mode the transmitted radar signals are bundled in a smaller opening angle, so that the range is increased.
- the radar system can be operated in different range measurement modes, in particular a long-range measurement mode and a short-range measurement mode.
- Objects in the vicinity of the radar system in particular at distances of up to 100 m, in particular up to approximately 80 m, can be detected in the short-range measurement mode. This requires a shorter range of the radar signals than in the long-range measurement mode. In this way, the transmission energy can be distributed over a correspondingly large opening angle. In this way, a correspondingly large field of view can be realized in the close-range measurement mode.
- the long-range measurement mode objects can be detected at a greater distance, especially in the range of up to 200 m or more. This requires the energy of the radar signals to be bundled in order to achieve the appropriate range. Therefore, the opening angle and thus the field of view is smaller in the long-range measurement mode than in the close-up measurement mode.
- the different range measurement modes can be implemented one after the other or partly simultaneously. In this way, objects can be detected both in the vicinity of the radar system in a correspondingly wide field of view, and at a greater distance can be detected in a correspondingly smaller field of view. In this way, objects that are in front of the vehicle in the direction of travel or behind the vehicle in the direction of travel can be detected early in the long-range measurement mode.
- At least some of the transmitting antenna elements can be controlled in several different range measurement modes for transmitting radar signals.
- some transmitting antenna elements can be used both in the long-range measurement mode and in the short-range measurement mode. In this way, the number of transmission antenna elements required can be reduced.
- a readiness to receive can be established for a plurality of receiving-antenna elements of at least one receiving-antenna arrangement.
- a determination of the direction of detected objects can be improved by using a plurality of receiving antenna elements.
- the radar system can be operated at least temporarily with a control scheme based on a beamforming method and/or at least temporarily with a control scheme based on a MIMO method and/or the at least one transmitting antenna arrangement can be operated at least temporarily in at least two transmission antenna groups can be controlled, the transmission antenna elements within a transmission antenna group can be controlled together and the transmission antenna groups can be controlled separately.
- a direction of the transmitted radar signals can be set, in particular changed, using a beamforming method.
- a MIMO method the radar signals of the different transmitting antenna elements can be distinguished on the receiver side.
- the transmitting antenna elements can be controlled more easily, in particular jointly. With the joint activation of two transmitting antenna elements, the individual radar signals emitted by these can be superimposed to form a joint radar signal. So the transmission energy and the range for the common radar signal can be increased.
- a separate control of the transmission antenna groups enables coding of the respective radar signals. In this way, the radar signals and the signal paths of the transmitting antenna groups can be distinguished on the receiver side. In this way, the determination of directions of detected objects can be improved.
- At least one corresponding basic control scheme can be specified for the use of the radar system as a front radar system, corner radar system, side radar system and/or rear radar system and/or the basic control scheme can be used -Main beam axis of the at least one transmitting antenna arrangement are aligned relative to at least one vehicle reference area, in particular a vehicle longitudinal axis, and/or the basic main beam axis of the at least one transmitting antenna arrangement relative to at least one radar system using the basic control scheme- Reference area, in particular an antenna plane, are aligned.
- the basic main beam axis can be adjusted according to the respective basic control scheme so that it is in the direction of travel or against the direction of travel of the vehicle shows. In this way, objects in the direction of travel in front of or behind the vehicle can be detected in the basic setting of the radar system, which depends on the intended use.
- the basic main beam axis can be aligned with respect to at least one vehicle reference area, in particular a vehicle longitudinal axis, with the basic control scheme.
- the radar system can always be set in such a way that it can be aligned in a monitoring area of interest, in particular in the direction of travel in front of the vehicle or in the direction of travel behind the vehicle, regardless of its own orientation and/or its installation location on the vehicle .
- the basic control scheme can be used to align the basic chief beam axis relative to at least one radar system reference range. In this way, the basic control scheme can be specified prior to assembly on the vehicle, particularly during manufacture of the radar system.
- the at least one radar system reference range can be an imaginary axis and/or a plane based on the geometry of the radar system, in particular an antenna arrangement.
- the at least one radar system reference range can advantageously be an antenna plane in which the respective phase centers of at least some of the transmitting antenna elements and/or the receiving antenna elements are located.
- At least one directional variable can be determined in at least one radar measurement, which characterizes at least one direction of at least one object reflecting the at least one transmitted radar signal relative to the radar system in at least one dimension
- at least one distance variable can be determined, which characterizes at least one distance of at least one object reflecting the at least one transmitted radar signal relative to the radar system
- at least one speed variable is determined which characterizes at least one speed of at least one object reflecting the at least one transmitted radar signal relative to the radar system.
- a plurality of transmitting antenna elements of an antenna arrangement can be controlled for transmitting radar signals and a readiness to receive echo signals can be established for a plurality of receiving antenna elements of the antenna arrangement by means of geometric convolution of the geometric position of the transmitting antenna elements and the receiving antenna elements of the Antenna arrangement a corresponding virtual receiving tennen array can be determined.
- a virtual reception antenna array can be implemented which has more virtual reception antenna elements than the real antenna arrangement. In this way, the performance of the radar system can be improved.
- the corresponding virtual receiving antenna array can be adapted by appropriate geometric arrangement of the transmitting antenna elements and the receiving antenna elements. In this way, in particular, an angular resolution can be improved when determining the direction.
- the object is achieved according to the invention in the radar system in that the at least one setting means has at least two basic control schemes for different settings of the at least one main beam axis in at least one measurement mode of the radar system and at least one intended use specification means for specifying one of the at least two basic control schemes depending on a purpose of use of the radar system in at least one measurement mode of the radar system.
- the object can be achieved according to the invention with the radar system in that the radar system has means for carrying out the method according to the invention.
- the radar system has at least one setting means with which at least two basic control schemes can be set depending on the intended use of the radar system.
- the same radar system can be adjusted for at least two purposes that require different adjustments of the at least one main beam axis.
- the corresponding basic control scheme which suits the desired purpose, can be specified with the at least one intended use specification means.
- the at least one setting means and/or the at least two basic control schemes and/or the at least one intended use specification means can be implemented at least partially in software, particularly in the control and detection device. In this way, one and the same radar system can be adapted to different systems without changing the hardware Purposes, in particular for different mounting locations and / or different orientations, are adapted to the vehicle.
- the at least one adjustment means can be a basic control scheme for using the radar system as a front radar system and/or at least one basic control scheme for using the radar system as a corner radar system and/or at least one basic control scheme for the using the radar system as a side radar system and/or have a basic control scheme for using the radar system as a rear radar system.
- the radar system can be easily adapted to the appropriate application.
- the main beam axis can be aligned parallel to the longitudinal axis of the vehicle in this way, independently of the installation location and the alignment of the radar system on the vehicle.
- the radar system in the long-range measurement mode, can be used to monitor a monitoring area in the direction of travel in front of the vehicle or in the direction of travel behind the vehicle.
- the at least one transmission antenna arrangement can have at least two transmission antenna elements, with at least two of the transmission antenna elements being able to be controlled separately for the transmission of radar signals and/or with at least two of the transmission antenna elements together for the transmission of Radar signals can be controlled.
- the radar system can be operated using a MIMO method.
- At least two transmitting antenna elements can be controlled together.
- the respective individual radar signals that are emitted by the transmitting antenna elements can be superimposed to form a common radar signal.
- the transmission energy and thus the range of the radar signals can be increased by the superimposition.
- the main beam direction can be changed by changing the phase shift of the individual radar signals. be changed.
- the at least one transmission antenna arrangement can have at least two transmission antenna elements, with at least two of the transmission antenna elements being arranged in a transmission antenna group, with the distances between phase centers of adjacent transmission antenna elements in the same transmission antenna group being approximately half the wavelength correspond to the transmitted radar signals and the transmitting antenna elements of the same transmitting antenna group can be controlled together or separately for transmitting radar signals.
- control of the transmitting-antenna elements can be simplified.
- the distance between the phase centers of the transmitting antenna elements of the same transmitting antenna group of half a wavelength of the radar signals enables a beamforming method to be carried out.
- the transmitting antenna elements of the same transmitting antenna group can be controlled together.
- the separate control of the transmitting antenna elements enables the implementation of a MIMO method.
- At least three transmitting antenna elements can be arranged in at least two transmitting antenna groups, with the distances between phase centers of adjacent transmitting antenna groups being greater than half the wavelength of the transmitted radar signals and/or with the distances between phase centers of adjacent transmitting antenna groups being approximately an integer multiple half the wavelength of the transmitted radar signals.
- the radar system can also be operated with a combination of a beamforming method and a MIMO method.
- the at least one transmission antenna arrangement can be implemented as a phased array and/or the radar system can have at least one phase shifter for realizing phase shifts between coherent transmission control signals for driving the transmission antenna elements.
- the transmission antenna elements can be driven jointly with coherent transmission control signals. In this way it is possible to implement a phase shift between the transmission control signals for the transmission antenna elements.
- a phase shift between the transmission control signals of the transmission antenna elements can easily be implemented with a phase shifter.
- At least one intended use specification means can have at least one intended use variable, in particular a variable characterizing a phase shift.
- a corresponding basic control scheme can be set with the aid of the at least one intended use variable, with which the corresponding transmitting antenna elements can be controlled.
- the at least one intended use variable can be stored in a corresponding memory device, in particular a memory device of the control and detection device.
- a corresponding memory device in particular a memory device of the control and detection device.
- the radar system can have at least one setting means with at least two range control schemes to implement different range measurement modes, in particular to implement a long-range measurement mode and/or a short-range measurement mode.
- the radar system with the at least one setting means can be brought into the corresponding range measurement modes by means of the range control schemes, starting from the basic control scheme associated with the intended use.
- the range control scheme is effectively superimposed on the corresponding base control scheme.
- At least two range control schemes allow the radar system to operate in at least two range measurement modes, specifically a long range measurement mode and a short range measurement mode.
- the radar system can at least have a means for operating the radar system using a MIMO method, a beamforming method and/or a combined MIMO beamforming method.
- the radar system can be operated with the appropriate method, in particular as a function of an operating situation of the vehicle, in particular as a function of a driving situation of the vehicle.
- the MIMO method, the beamforming method and the combined MIMO beamforming method can be implemented by appropriate control, in particular group control, of the transmitting antenna elements according to a corresponding control scheme.
- the at least one means for operating the radar system using the MIMO method, the beamforming method and the combined MIMO beamforming method can be implemented using software. In this way, no hardware adjustment is required when the process is changed.
- At least one receiving antenna arrangement can have at least three receiving antenna elements, the respective phase centers of which are each arranged on one of two parallel imaginary receiving antenna axes, with at least one phase center of a receiving antenna element being arranged on each receiving antenna axis and/or at least one receiving antenna arrangement has at least four receiving antenna elements whose respective phase centers are each arranged on one of three parallel imaginary receiving antennas, with at least one phase center of a receiving antenna element being arranged on each receiving antenna axis.
- directions in which detected objects are located relative to the radar system can be determined in two dimensions, in particular in azimuth and elevation.
- the arrangement of the receiving-antenna elements on three parallel axes enables a true resolution in the direction perpendicular to the receiving-antenna axes and a separation capability for two objects detected by the radar system.
- a distance from adjacent imaginary receiving antenna axes corresponds approximately to the wavelength of the radar signals transmitted with the transmitting antenna elements and/or a distance in the direction of the receiving antenna axes between respective phase centers of two adjacent receiving antenna elements on different receiving antenna axes approximately half the wavelength of the correspond to the radar signals transmitted by the transmitting antenna elements and/or a distance in the direction of the receiving antenna axes between respective phase centers of two adjacent receiving antenna elements on different receiving antenna axes corresponds approximately to the wavelength of the radar signals transmitted with the transmitting antenna elements and/or a distance between phase centers two adjacent receiving-antenna elements on the same receiving-antenna axis correspond to an integer multiple of half the wavelength, in particular twice or three times the half wavelength, of the radar signals transmitted with the transmitting-antenna elements.
- the radar system can be operated using a MIMO method, a beamforming method and a combination of beamforming methods and MIMO methods.
- a virtual receiving antenna array can be generated by geometric folding.
- the virtual receive antenna array may have more virtual receive antenna elements than the physically present receive antenna elements. In this way, an improvement in the performance of the radar system can be achieved.
- the phase centers of at least two receiving-antenna elements can lie on a first receiving-antenna axis and the perpendicular to the first receiving-antenna axis through the phase center of at least one receiving-antenna element on an adjacent second receiving-antenna axis outside of a region with the at least two receiving antenna elements lie on the first receiving antenna axis and/or the phase centers of at least two receiving antenna elements lie on a first receiving antenna axis and the perpendicular to the first receiving antenna axis through the phase center of at least one receiving antenna element is on an adjacent second receiving antenna axis outside of an area with the at least two receiving -antenna elements lie on the first receiving antenna axis and the perpendicular to the first receiving antenna axis through the phase center of at least one receiving antenna element on a third receiving antenna axis opposite the second receiving antenna axis with respect to the first receiving antenna axis outside the area with the receiving - antenna elements lie on the first reception
- the object is achieved according to the invention in the vehicle in that the vehicle has at least one radar system according to the invention and/or the vehicle has at least one radar system with means for carrying out a method according to the invention.
- the vehicle has at least one radar system with which a monitoring area, in particular outside the vehicle, can be used to can be awakened.
- the vehicle can advantageously have at least one driver assistance system. With the help of a driver assistance system, the vehicle can be operated autonomously or semi-autonomously.
- At least one radar system can advantageously be functionally connected to at least one driver assistance system.
- information about the monitoring area in particular object information, which is determined using the at least one radar system, can be used by the at least one driver assistance system to control autonomous or semi-autonomous operation of the vehicle.
- FIG. 1 shows a plan view of a vehicle with a driver assistance system and 3 radar systems in a driving situation
- FIG. 2 shows a side view of the vehicle from FIG. 1;
- FIG. 3 shows a detailed plan view of the vehicle from FIG. 1 in the area of the radar systems
- Figure 4 is a functional representation of one of the radar systems of the vehicle from Figure 1;
- FIG 5 shows an arrangement of phase centers of an antenna arrangement with transmitting antenna elements and receiving antenna elements according to a first exemplary embodiment of one of the radar systems of the vehicle from FIG are shown;
- FIG. 6 shows the arrangement of the phase centers of the antenna arrangement from FIG. 5 and the arrangement of the virtual phase centers of a corresponding virtual antenna array
- FIG. 7 shows a two-dimensional antenna diagram for the virtual antenna array from FIG. 6;
- FIG. 8 shows a horizontal diagram corresponding to the antenna diagram from FIG. 7;
- FIG. 9 shows a vertical diagram corresponding to the antenna diagram from FIG. 7;
- FIG. 10 shows the arrangement of the phase centers of the antenna arrangement according to the first exemplary embodiment from FIG. 5 during operation in a long-range measurement mode
- FIG. 11 shows the arrangement of the phase centers of the antenna arrangement from FIG. 10 and the arrangement of the virtual phase centers of a corresponding virtual antenna array
- FIG. 12 shows a two-dimensional antenna diagram for the virtual antenna array from FIG. 11;
- FIG. 13 shows a horizontal diagram corresponding to the antenna diagram from FIG. 12;
- FIG. 14 shows a vertical diagram corresponding to the antenna diagram from FIG. 12;
- FIG. 15 shows an arrangement of phase centers of an antenna arrangement with transmitting antenna elements and receiving antenna elements according to a second exemplary embodiment of one of the radar systems of the vehicle from FIG are shown;
- FIG. 16 shows the arrangement of the phase centers of the antenna arrangement from FIG. 15 and the arrangement of the virtual phase centers of a corresponding virtual antenna array;
- FIG. 17 shows a two-dimensional antenna diagram for the virtual antenna array from FIG. 16;
- FIG. 18 shows a horizontal diagram corresponding to the antenna diagram from FIG. 17;
- FIG. 19 shows a vertical diagram corresponding to the antenna diagram from FIG. 17;
- FIG. 20 shows the arrangement of the phase centers of the antenna arrangement according to the first exemplary embodiment from FIG. 15 during operation in a long-range measurement mode
- FIG. 21 shows the arrangement of the phase centers of the antenna arrangement from FIG. 20 and the arrangement of the virtual phase centers of a corresponding virtual antenna array
- FIG. 22 shows a two-dimensional antenna diagram for the virtual antenna array from FIG. 21;
- FIG. 23 shows a horizontal diagram corresponding to the antenna diagram from FIG. 22;
- FIG. 24 shows a vertical diagram corresponding to the antenna diagram from FIG.
- FIG. 1 shows a top view of a vehicle 10 in the form of a passenger car in a driving situation.
- FIG. 2 shows the vehicle 10 in a side view.
- the vehicle 10 includes, for example, three radar systems 12 and a driver assistance system 14.
- the radar systems 12 are arranged, for example, on the front side of the vehicle 10 in the direction of travel 16.
- a monitoring area 18 in front of and diagonally in front of the vehicle 10 can be monitored for objects 20 with the radar systems 12 .
- the three radar systems 12 are shown in detail in a top view in FIG. 3, the outlines of the front part of the vehicle 10 being indicated by dashed lines.
- an object 20 is arranged in front of vehicle 10, which can be detected by radar system 12.
- object information for example distances D
- directions for example azimuth 0 and elevation angle ⁇
- speeds of detected objects 20 relative to the vehicle 10 can be determined.
- the radar systems 12 are each functionally connected to the driver assistance system 14 . Object information ascertained with the radar systems 12 can thus be transmitted to the driver assistance system 14 . With the driver assistance system 14, the vehicle 10 can be operated autonomously or less partially autonomously.
- radar systems can also be arranged at other points of the vehicle 10, also in a different orientation.
- radar systems can also be arranged at the rear of the vehicle 10 with which a monitoring area in the direction of travel 16 behind or diagonally behind the vehicle 10 is monitored for objects 20 .
- radar systems can also be provided which, as side radar systems, can monitor corresponding monitoring areas on the side of vehicle 10 .
- the x-axis of the x-y-z coordinate system runs, for example, parallel to the vehicle longitudinal axis 22 of the vehicle 10.
- the y-axis runs parallel to a vehicle transverse axis 24 of the vehicle 10 and the z-axis runs spatially upwards perpendicular to the x-y plane.
- One of the radar systems 12 is arranged, for example, in the center of the front bumper and serves as a front radar system.
- the two other radar systems 12 are each arranged on opposite sides of the front radar system 12 in a front corner area of the vehicle 10 .
- the two outer radar systems 12 serve as corner radar systems.
- An antenna plane 26 of front radar system 12 runs perpendicular to vehicle longitudinal axis 22.
- the respective antenna planes 26 of the radar systems 12 are virtual planes in which there are phase centers 28 of antenna elements of the respective radar system 12, namely phase centers 28t of transmitting antenna elements Tx and phase centers 28r of receiving antenna elements Rx.
- the antenna planes 26 of all three radar systems 12 run perpendicular to the x-y plane, that is to say spatially vertical in the normal operating situation of the vehicle 10 .
- the right-hand corner radar system 12 viewed in the direction of travel 16 is pivoted by approximately 45° to the right, so that its antenna plane 26 runs at an angle of approximately 45° to the longitudinal axis 22 of the vehicle.
- the radar system 12 on the left viewed in the direction of travel 16 is correspondingly inclined by ⁇ 45° to the left, so that its antenna plane 26 is correspondingly inclined by ⁇ 45° to the left relative to the longitudinal axis 22 of the vehicle.
- Radar signals 30 can be sent into the surveillance area 18 with the radar systems 12 .
- Radar signals 32 reflected on objects 20 in the direction of the radar systems 12 can be received by the radar systems 12 as echo signals 32 .
- the corresponding object information namely the distance D, the azimuth 0, the elevation angle ⁇ and the speed of the detected object 20 relative to the vehicle 10 can be determined from the echo signals 32 .
- the radar systems 12 have an identical structure and function identically. The structure of the radar systems 12 is explained in more detail below using the example of the front radar system 12 with reference to FIG.
- the radar system 12 includes an antenna arrangement 34 with the transmitting antenna elements Tx and the receiving antenna elements Rx and a control and detection device 36.
- the control and detection device 36 can be used to control the transmitting antenna elements Tx for transmitting radar signals 30.
- the control and detection device 36 can be used to detect and evaluate the echo signals 32 received with the receiving antenna elements Rx. be killed
- the corresponding object information can be determined from this with the control and detection device 36 and transmitted to the driver assistance system 14 .
- the antenna arrangement 34 comprises a plurality of transmitting antenna elements Tx, only two of which are shown as an example in FIG. 4, and a plurality of receiving antenna elements Rx, of which only two are also shown as an example.
- the radar system 12 can be operated both with a MIMO (Multiple-In-Multiple-Out) method and with a beamforming method.
- MIMO Multiple-In-Multiple-Out
- the transmission antenna elements Tx are driven separately by the control and detection device 36 with transmission control signals.
- the radar signals 30 are made distinguishable, for example by coding, with the aid of corresponding transmission control signals.
- signal paths of the radar signals 30 and the corresponding echo signals 32 can be assigned to the respective transmitting antenna elements Tx on the receiver side.
- a number of transmission antennas Tx are controlled together with coherent transmission control signals with corresponding phase shifts, which can also be zero.
- the individual radar signals transmitted with the transmission antennas Tx can interfere with an overall radar signal 30 .
- the direction of a main beam axis 42 for the radar signal 30 can be changed by appropriate phase shifts.
- a phase shifter 43 is assigned to each transmission antenna Tx in order to implement the phase shifts.
- the control and detection device 36 includes a setting means 38 with which a purpose of use mode and a measurement mode of the radar system 12 can be set.
- the purpose of use mode is set depending on the use of the particular radar system 12 .
- three uses for the radar system are shown, namely the use as a front radar system 12, as a right-corner radar system 12 or as a left-corner radar system 12.
- Measurement modes are the modes in which the radar system makes 12 radar measurements. Two measurement modes are described below as examples. Namely, a long-range measurement mode and a short-range measurement mode.
- the radar system 12 is operated using a combination of the MIMO method and the beamforming method.
- objects 20 can be detected at distances of up to approximately 200 m in a long-range field of view 40f of radar system 12 indicated in FIG. 3, and their direction relative to radar system 12 and vehicle 10 can be determined.
- the radar system 12 is operated using the MIMO method.
- objects 20 can be detected in a short-range field of view 40n, for example at a distance of up to 100 m.
- the close-up field of view 40n has an opening angle that is significantly larger than the opening angle of the long-range field of view 40f.
- a main main beam axis 42 of the antenna arrangement 34 should be approximately parallel to the direction of travel 16, for example be aligned approximately parallel to the longitudinal axis 22 of the vehicle.
- the basic chief beam axis 42 defines the alignment of the long-range field of view 40f and the main propagation direction of the transmitted radar signals 30 in the basic setting of the radar system 12 for the corresponding application.
- the direction of propagation of the radar signals 30 in the long-range measurement mode can optionally be additionally changed, for example pivoted, relative to the main main beam axis 42 .
- the adjustment of the orientation of the main main beam axis 42 depending on the intended use of the radar system 12 as a front radar system or corner radar system is defined with the setting means 38 via the intended use mode.
- the setting means 38 includes, for example, three basic control schemes 44, two measurement control schemes 46 and, for example, three intended use variables 48.
- the measurement control schemes 46 each contain the specifications under which transmission control signals are sent to the transmission antenna elements Tx in accordance with the desired measurement mode.
- a measurement control scheme 46 is provided for the long-range measurement mode and a measurement control scheme 46 for the short-range measurement mode.
- the basic control schemes 44 each contain the specifications under which the corresponding transmission control signals are sent to the transmission antenna elements Tx in the long-range measurement mode for aligning the basic main beam axis 42 .
- Application variables 48 each characterize an application of radar system 12 .
- Application variables 48 can be stored in a memory of control and detection device 14 , for example.
- each of the purpose of use variable 48 is a phase shift.
- the transmission-antenna elements Tx can be driven jointly with coherent transmission signals, between which the corresponding phase shift specified as intended purpose variable 48 is set. Due to the corresponding phase shift, the basic main beam axis 42 can be aligned relative to the antenna plane 26 of the radar system 12 in order to adapt it to the intended use.
- a basic control scheme 44 and a purpose variable 48 for using radar system 12 as a front radar system a basic control scheme 44 and a purpose variable 48 for use as a left corner radar system and a basic control scheme 44 and an intended use size 48 for use as a right corner radar system.
- the basic control scheme 44 can be implemented with the appropriate purpose of use size 48 .
- the basic control scheme 44 for the right corner radar system 12 can drive of the transmission-antenna elements Tx with coherent transmission control signals, which are shifted by the predetermined phase shift in such a way that the main beam axis 42 of the resulting radar signal 30 is pivoted by -45° to the antenna plane 26 .
- the alignment of the corner radar system 12, which has been pivoted by 45° can be corrected in order to align the main main beam axis 42 parallel to the direction of travel 16 or to the longitudinal axis 22 of the vehicle.
- the phase shift can also be zero.
- the corresponding intended purpose variable 48 can be set when the radar system 12 is installed on the vehicle 10 or in front of it. In the radar system 12, more or fewer than the three purpose variables 48 can also be stored. For example, intended use sizes can be provided for uses on different vehicles and/or at different locations and/or with different orientations on vehicles. The radar system 12 can thus be used universally for different vehicles and different uses on or in vehicles and adapted accordingly.
- the setting means 38 is implemented, for example, by software in the control and detection device 36 . In this way, no change to the hardware of the radar system 12 is required to adapt the radar system 12 to different uses.
- the operation of the radar system 12 with an antenna arrangement 34 according to a first exemplary embodiment is explained in more detail below with reference to FIGS. 5 to 9 in the short-range measurement mode and in the long-range measurement mode with reference to FIGS.
- phase centers 28t of the transmitting antenna elements Tx and the phase centers 28r of the receiving antenna elements Rx of the antenna arrangement 34 are shown in FIG. 5 and FIG. 6 below.
- FIG. 5 shows the transmitting antenna arrangement 34t on the left side separately from the receiving antenna arrangement 34r on the right.
- the transmit antenna assembly 34t and the receiving antenna arrangement 34r can also be arranged in other ways with respect to one another.
- the transmitting antenna arrangement 34t and the receiving antenna arrangement 34r can also overlap, as shown in FIG. 6 below.
- the phase centers 28t of the transmitting antenna elements Tx are shown with circles and the phase centers 28r of the receiving antenna elements Rx with black triangles.
- the transmission antenna arrangement 24s comprises four transmission antenna elements Tx.
- the phase centers 28 t are arranged on an imaginary transmitter-antenna axis 50 .
- the transmitter antenna axis 50 runs in the antenna plane 26 and, for example, horizontally, parallel to the x-y plane.
- the four phase centers 28t are arranged in two transmission antenna groups SG.
- a distance 52 between the phase centers 28t of the same transmitting antenna group SG corresponds approximately to half the wavelength X of the radar signals 30 transmitted with the transmitting antenna elements Tx.
- a distance 54 between the phase centers 28t of the two transmitting antenna elements Tx on the sides facing the two transmitting antenna groups SG is approximately 3/2 the wavelength X
- the receiving antenna arrangement 34r includes a total of four receiving antenna elements Rx. Three of the phase centers 28r are arranged on a first receive antenna axis 56 . In the exemplary embodiment shown, the first receiving-antenna axis 56 runs coaxially to the transmitting-antenna axis 50 of the transmitting-antenna arrangement 34t in the antenna plane 26.
- the three transmitting antenna elements Tx on the first receiving antenna axis 56 form a group of three.
- a distance 58 between the phase center 28r on the left in FIGS. 5 and 6 and the middle phase center 28r of the group of three on the first receiving antenna axis 56 corresponds approximately to the wavelength X of the radar signals 30.
- a distance 60 between the phase center 28r of the middle receiving antenna element Rx and the phase center 28r of the right receiving antenna element Rx corresponds to about 3/2 of the wavelength X of the radar signals 30.
- the phase center 28r of the fourth receiving antenna element Rx is arranged on a second receiving antenna axis 62 .
- the second receiving antenna axis 62 runs parallel to the first receiving antenna axis 56 in the antenna plane 26.
- a distance 64 between the first receiving antenna axis 56 and the second receiving antenna axis 62 corresponds to the wavelength X of the radar signals 30.
- a perpendicular 66 through the phase center 28r of the fourth receiving-antenna element Rx onto the first receiving-antenna axis 56 is located outside the group of three of the phase centers 28r of the receiving-antenna elements Rx on the first receiving-antenna axis 56.
- the phase center is 28r of the receiving antenna element Rx on the second receiving antenna axis 62 compared to the group of three of the phase centers 28r on the first receiving antenna axis 56 offset to the left.
- a distance 68 between the perpendicular 66 on the first reception-antenna axis 56 through the phase center 28r on the second reception-antenna axis 62 and the phase center 28r of the left-hand reception-antenna element Rx in Figure 5 on the first reception-antenna axis 56 corresponds to half the wavelength X of the radar signals 30.
- the radar system 12 is operated using the MIMO method.
- the transmitting-antenna elements Tx are operated separately, for example with transmission control signals encoded relative to one another, so that the transmitting-antenna elements Tx emit radar signals 30 that can be distinguished.
- a virtual antenna array 70 shown at the top of FIG. 6 is generated by geometric convolution of the geometric positions of the phase centers 28t of the transmitting antenna elements Tx and phase centers 28r of the receiving antenna elements Rx.
- the virtual phase centers 72 of the virtual antenna elements of the virtual antenna array 70 are indicated as black squares in FIG.
- a total of 14 virtual antennas are antenna elements with corresponding virtual phase centers 72 are generated.
- the virtual phase centers 72 are arranged on a first virtual antenna axis 74 and a second virtual antenna axis 76 .
- the virtual antenna axes 74 and 76 run parallel to the transmitter antenna axes 50, 56 and 62 in the antenna plane 26.
- the azimuth 0 can be determined by the distribution of the virtual phase centers 72 along the virtual antenna axes 74 and 76 in each case.
- the distribution of the virtual phase centers 72 on the two spaced virtual antenna axes 74 and 76 that is to say on two elevation planes, enables the elevation angle ⁇ to be determined.
- FIG. 7 shows an example of a two-dimensional antenna diagram for the virtual antenna array 70 in the short-range measurement mode using the MIMO method in grayscale in the two directional dimensions elevation angle ⁇ and azimuth 0.
- the assignment of the gray levels to normalized intensities is shown in dB in an intensity scale on the right-hand side.
- the azimuth 0 is shown in degrees in the direction of the abscissa axis.
- the elevation angle ⁇ t> is also shown in degrees on the ordinate axis.
- the normalized intensity curve 80 for the virtual array 70 is shown in FIG. 8 with solid lines 80.
- the normalized intensity profile 82 for the transmitting antenna arrangement 34t is shown with dashed lines only for comparison.
- the normalized intensity curve 84 for the receiving antenna arrangement 34r is shown with dotted lines.
- FIG. 10 shows the transmitting antenna arrangement 34t and the receiving antenna arrangement 34r next to one another, analogously to the illustration in FIG.
- the antenna arrangement 34 is shown in FIG. 11 analogously to the representation in FIG.
- the transmitting antenna elements Tx of the same transmitting antenna group SG are driven with the same coherent transmission control signals with a phase shift which is predetermined by the intended use variable 48 .
- the main main beam axis 42 is set according to the intended use.
- the two transmission antenna groups SG are driven with different transmission control signals, for example coded to one another, so that the echo signals 32 of the radar signals 30 transmitted by the two transmission antenna groups SG can be assigned to the respective transmission antenna group SG on the side of the reception antenna elements Rx.
- a group phase center 28SG is implemented for each transmission antenna group SG, which is geometrically located between the individual phase centers 28t of the transmission antenna elements Tx of the respective transmission antenna group SG.
- a distance 86 between the group phase centers 28SG is approximately twice the wavelength X of the transmitted radar signals 30.
- a virtual array is created by the geometric folding of the positions of the group phase centers 28SG of the transmission groups SG and the reception phase centers 28r of the reception antenna elements Rx in the MIMO beamforming method 70 realized, whose virtual phase centers 72 are shown in FIG. 11 above.
- the total number of virtual array elements whose virtual phase centers 72 are shown in FIG. 11 totals eight, and is therefore lower than the total number of virtual array elements in the MIMO method explained in connection with FIGS. In this way, the sidelobe levels increase. This can be seen from the antenna diagrams in FIGS. However, a higher range is also achieved, which is required in the long-range measurement mode.
- FIG. 12 shows an example of a two-dimensional antenna diagram for the virtual antenna array 70 in long-range measurement mode using the MIMO beamforming method in grayscale in the two directional dimensions elevation angle ⁇ and azimuth 0.
- the assignment of the gray levels to normalized intensities is shown in dB in an intensity scale on the right-hand side.
- the azimuth 0 is shown in degrees in the direction of the abscissa axis.
- the elevation angle is also shown in degrees on the ordinate axis.
- the normalized intensity curve 80 for the virtual array 70 is shown in FIG. 13 with solid lines 80 .
- the normalized intensity profile 82 for the transmitting antenna arrangement 34t is shown with dashed lines only for comparison.
- the normalized intensity curve 84 for the receiving antenna arrangement 34r is shown with dotted lines.
- the antenna arrangement 34 shown at the bottom in Figure 15 and Figure 16 according to the second exemplary embodiment differs from the antenna arrangement 34 according to the first exemplary embodiment from Figures 5 and 6 in that the phase center 28r of the receiving antenna element Rx on the right in Figure 15 is is arranged on the first reception-antenna axis 56 on a third reception-antenna axis 88 .
- the third receiving antenna axis 88 runs parallel to the first receiving antenna axis 56, on the opposite side of the second receiving antenna axis 62 of the first receiving antenna axis 56.
- the third receiving antenna axis 88 is also located in the antenna plane 26.
- a distance 90 between the first receiving antenna axis 56 and the third receiving antenna axis 90 corresponds to the distance 64 between the first receiving antenna axis 56 and the second receiving antenna axis 62.
- the distance 90 corresponds approximately to the wavelength X of the transmitted radar signals 30.
- a distance 92 between the perpendicular 94 on the first antenna axis 56 through the phase center 28r of the receiving antenna element Rx on the third receiving antenna axis 88 to the phase center 28r of the adjacent receiving antenna element Rx, namely the right phase center 28r on the first receiving antenna axis 56 corresponds approximately to the wavelength X of the transmitted radar signals 30.
- the perpendicular 94 is outside of the range of the phase centers 28r of the two inner receiving antenna elements Rx on the first receiving antenna axis 56.
- the perpendicular 94 through the phase center 28r on the third receiving antenna axis 88 is on the perpendicular 66 through the first Phase center 28r on the opposite side of the second reception-antenna axis 94 of the area with the two middle reception-antenna centers 28r on the first reception-antenna axis 56.
- FIG. 16 shows the phase centers 28 of the antenna arrangement 34 according to the second exemplary embodiment, below, and the corresponding virtual array 70, above, during operation of the radar system 12 in the short-range measurement mode using the MIMO method.
- FIG. 16 shows the virtual phase centers 72 of the virtual array 70 belonging to the antenna arrangement 34 according to the second exemplary embodiment in the short-range measurement mode.
- An extent 96 of the virtual array 70 in elevation which runs parallel to the z-axis, is greater than the corresponding extent 96 in the antenna arrangement 34 according to the first exemplary embodiment from FIGS for the measurement of the elevation angle ⁇ t>, a resolution in the elevation direction with the ability to separate two detected objects can be achieved.
- the middle row of the virtual array 70 is fully occupied in the azimuth 0 direction, exemplarily in the y-axis direction, thereby reducing sidelobe levels.
- FIG. 17 shows an example of a two-dimensional antenna diagram for the virtual antenna array 70 according to the second exemplary embodiment in the short-range measurement mode using the MIMO method in grayscale in the two directional dimensions elevation angle ⁇ and azimuth 0.
- the assignment of the gray levels to normalized intensities is shown in dB in an intensity scale on the right-hand side.
- the azimuth 0 is shown in degrees in the direction of the abscissa axis.
- the elevation angle is also shown in degrees on the ordinate axis.
- the normalized intensity curve 80 for the virtual array 70 is shown in FIG. 18 with solid lines 80 .
- the normalized intensity profile 82 for the transmitting antenna arrangement 34t is shown with dashed lines only for comparison.
- the normalized intensity curve 84 for the receiving antenna arrangement 34r is shown with dotted lines.
- the transmitting antenna elements Tx are operated analogously to operation in the long-range measurement mode with the antenna arrangement 34 according to the first exemplary embodiment from FIGS. 11 to 14.
- the virtual phase centers 72 of the resulting virtual antenna array 70 are shown in FIG. 21 at the top. As with the operation of the radar system 12 with the antenna arrangement 34 according to the second exemplary embodiment in the short-range measurement mode, illustrated in FIGS. 15 to 19, the virtual phase centers 72 are distributed over three elevation levels.
- the total number of virtual antenna arrays 70 is reduced to 8.
- the intensity of the side lobe levels therefore increases, as shown in FIGS.
- the beamforming within the MIMO beamforming process enables a greater range with almost unchanged angular resolution compared to operation in the short-range measurement mode.
- FIG. 22 shows an example of a two-dimensional antenna diagram for the virtual antenna array 70 in the long-range measurement mode using the MIMO beamforming method in grayscale in the two directional dimensions elevation angle ⁇ t> and azimuth 0.
- the assignment of the gray levels to normalized intensities is shown in dB in an intensity scale on the right-hand side.
- the azimuth 0 is shown in degrees in the direction of the abscissa axis.
- the elevation angle is also shown in degrees on the ordinate axis.
- the normalized intensity curve 80 for the virtual array 70 is shown in FIG. 23 with solid lines 80 .
- the normalized intensity profile 82 for the transmitting antenna arrangement 34t is shown with dashed lines only for comparison.
- the normalized intensity curve 84 for the receiving antenna arrangement 34r is
- a half-value width 98 of the main lobe in the direction of the azimuth 0 is 10.5° at the 3 dB limit.
- the corresponding half-width 98 in the direction of the azimuth 0 is only 9.5°, as can be seen from FIGS.
- the FWHM 100 of the main lobe at the 3 dB limit is 21° in the antenna arrangement 34 according to the second exemplary embodiment, as can be seen from FIGS.
- the corresponding FWHM 100 at the 3 dB limit in the direction of the elevation angle ⁇ is 35.5°.
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022101752.4A DE102022101752A1 (de) | 2022-01-26 | 2022-01-26 | Verfahren zum Betreiben eines Radarsystems für ein Fahrzeug, Radarsystem und Fahrzeug |
| PCT/EP2023/051743 WO2023144173A1 (de) | 2022-01-26 | 2023-01-25 | Verfahren zum betreiben eines multi-range-radarsystems für ein fahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4469823A1 true EP4469823A1 (de) | 2024-12-04 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| EP23702259.5A Pending EP4469823A1 (de) | 2022-01-26 | 2023-01-25 | Verfahren zum betreiben eines multi-range-radarsystems für ein fahrzeug |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20250164634A1 (de) |
| EP (1) | EP4469823A1 (de) |
| JP (1) | JP2025503975A (de) |
| KR (1) | KR20240141809A (de) |
| CN (1) | CN118633036A (de) |
| DE (1) | DE102022101752A1 (de) |
| WO (1) | WO2023144173A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250030161A1 (en) * | 2023-07-18 | 2025-01-23 | Honeywell International Inc. | Compact, hybrid, low-cost high-resolution dual-mode phased array antenna |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004059915A1 (de) | 2004-12-13 | 2006-06-14 | Robert Bosch Gmbh | Radarsystem |
| US8405541B2 (en) * | 2010-09-01 | 2013-03-26 | Toyota Motor Engineering & Manufacturing North America, Inc. | Multi-range radar system |
| DE102010064346A1 (de) | 2010-12-29 | 2012-07-05 | Robert Bosch Gmbh | Radarsensor für Kraftfahrzeuge |
| DE102013216970A1 (de) * | 2013-08-27 | 2015-03-05 | Robert Bosch Gmbh | Radarsensor für Kraftfahrzeuge |
| US10261179B2 (en) * | 2016-04-07 | 2019-04-16 | Uhnder, Inc. | Software defined automotive radar |
| JP6725437B2 (ja) * | 2017-02-22 | 2020-07-15 | 株式会社Soken | レーダ装置 |
| US10605911B1 (en) * | 2017-06-15 | 2020-03-31 | Northrop Grumman Systems Corporation | Multibeam receiver system and method |
| DE102018207686A1 (de) | 2018-05-17 | 2019-11-21 | Robert Bosch Gmbh | MIMO-Radarsensor für Kraftfahrzeuge |
| WO2020075689A1 (ja) * | 2018-10-12 | 2020-04-16 | 京セラ株式会社 | 電子機器、電子機器の制御方法、及び電子機器の制御プログラム |
| US11360210B2 (en) * | 2019-07-02 | 2022-06-14 | Intel Corporation | Multi-mode multi-input multi-output (MIMO) radar sensors |
| DE102019134304A1 (de) | 2019-12-13 | 2021-06-17 | Valeo Schalter Und Sensoren Gmbh | Radarsystem und Verfahren zum Betreiben eines Radarsystems |
-
2022
- 2022-01-26 DE DE102022101752.4A patent/DE102022101752A1/de active Pending
-
2023
- 2023-01-25 JP JP2024544461A patent/JP2025503975A/ja active Pending
- 2023-01-25 KR KR1020247028680A patent/KR20240141809A/ko active Pending
- 2023-01-25 CN CN202380019126.0A patent/CN118633036A/zh active Pending
- 2023-01-25 US US18/832,509 patent/US20250164634A1/en active Pending
- 2023-01-25 WO PCT/EP2023/051743 patent/WO2023144173A1/de not_active Ceased
- 2023-01-25 EP EP23702259.5A patent/EP4469823A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240141809A (ko) | 2024-09-27 |
| US20250164634A1 (en) | 2025-05-22 |
| WO2023144173A1 (de) | 2023-08-03 |
| CN118633036A (zh) | 2024-09-10 |
| DE102022101752A1 (de) | 2023-07-27 |
| JP2025503975A (ja) | 2025-02-06 |
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