WO2006045668A1 - Sensorsystem für kraftfahrzeuge mit fmcw-radar sensoren zur winkelaufgelösten entfernungsbestimmung eines objekts mittels triangulation - Google Patents
Sensorsystem für kraftfahrzeuge mit fmcw-radar sensoren zur winkelaufgelösten entfernungsbestimmung eines objekts mittels triangulation Download PDFInfo
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- WO2006045668A1 WO2006045668A1 PCT/EP2005/054458 EP2005054458W WO2006045668A1 WO 2006045668 A1 WO2006045668 A1 WO 2006045668A1 EP 2005054458 W EP2005054458 W EP 2005054458W WO 2006045668 A1 WO2006045668 A1 WO 2006045668A1
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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
- 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
- G01S13/87—Combinations of radar systems, e.g. primary radar and secondary 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
- 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
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
- G01S13/345—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using triangular modulation
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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
- 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
- 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
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
- G01S7/0232—Avoidance by frequency multiplex
-
- 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
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
- G01S7/0235—Avoidance by time multiplex
-
- 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
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/583—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets
- G01S13/584—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements
-
- 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 present invention relates to a device for angular resolution
- One way to increase the safety of a vehicle is to automatically detect obstacles in traffic. For this purpose, a determination of the distance of the vehicle to a possible obstacle is required, as well as a determination of the direction in which the obstacle is located.
- the direction to the obstacle must be determined to distinguish between obstacles that are on the road or at the edge of the road.
- One way to increase the comfort of the vehicle is to determine the speed of a preceding vehicle in dense traffic and automatically adjust the speed of your own vehicle. This requires the distance be determinable to the vehicle in front, its speed and whether this vehicle is on the same lane or offset to the own vehicle in a second lane. These are two possible uses for a radar system in the vehicle sector, another would be, inter alia, a parking aid. All of these methods require a device which allows the distance and
- a primary source is provided for microwaves, the emission of which is focused by means of suitable optics onto a beam with a half-width of 3-4 ° and then by means of a deflection optics 3-4
- the portions reflected by an object are detected separately with a detection device.
- An amplitude comparison of the reflected components for the individual beams makes it possible to determine the direction in which the object is located.
- the achievable angular resolution, as well as the covered angle range are disadvantageously determined by the mechanical structure and thus limit the range of application of the sensor.
- Another method provides to determine from the phase of the reflected rays, the geometric arrangement of the object to a sensor array.
- a sensor arrangement provides that a suitable transmitting device illuminates the entire desired viewing area and a plurality of receiving devices detect the signals reflected by the object. The receiving devices determine the phase of the individual reflected signals and a signal processing device calculates, based on these phase signals, the different path lengths that the reflected signals have covered and thus the geometric arrangement of the object to the vehicle.
- a disadvantage of this arrangement is that a high output power of the transmitting device is required because for all receiving devices a part of the transmission signal must be provided for a receiving mixer and due to the strong attenuation of the frequencies used in the range of 76-81, 122-
- Another sensor arrangement provides to use only one receiver device and to connect these temporally sequentially with a plurality of antenna devices.
- the disadvantage of this device is that the duration for a measurement with all antenna devices due to the multiplexing process is too long for this device to be used for dynamic situations in traffic.
- a further sensor arrangement provides for combining the receiving device with the transmitting device and for connecting the receiving device to a plurality of antenna devices in chronological succession.
- This device also has the disadvantage of a too long measurement time.
- the idea underlying the present invention is to arrange a plurality of sensor modules at intervals with each sensor module having a local oscillator device.
- the oscillator device generates an oscillator signal, which is forwarded to a transceiver device, and the oscillator signal is radiated.
- the transceiver is arranged to receive signals reflected from the object.
- a phase detection device is coupled to an input with the oscillator device and with a second input to the transceiver. Based on the oscillator signal and the received reflected signals, the phase detection means determines a phase signal.
- Signal processing device determines a direction of the object to the sensor module based on the distances between the sensor modules to each other and the phase signals.
- the present invention has the advantage over the known approach that each sensor module has its own local oscillator device.
- Distribution device for distributing the microwave signal from a central oscillator device to the individual sensor modules is therefore not required and thus the losses of the device are kept low.
- the method according to the invention for an angle-resolved distance determination for an object using the device according to the invention provides that at least one of the transmitter / receiver devices of the sensor modules transmits the oscillator signal.
- the reflected rays from the object are received by the transmitting / receiving device from a direction of the object.
- a phase signal is determined, which in turn is the basis for determining the direction of the object to a sensor module by means of the control and signal processing means.
- the distances of the sensor modules to each other are equidistant or in a further preferred embodiment, the distances are different in size. Equidistant distances have the advantage that a high signal to noise ratio can be achieved. By contrast, an arrangement with different sized spacings has the advantage that this reduces the number of ambiguities for the direction determination.
- a co -imation device comprising a lens and / or a dielectric polyrod is arranged in the emission direction of one of the sensor modules.
- a quasi-optical filter is arranged in the emission direction of one of the sensor modules, with which a suppression of ambiguities can be achieved from certain directions.
- At least one of the phase detection devices has a controllable filter device with an adjustable filter characteristic.
- At least one of the sensor modules has a controllable oscillator device with adjustable oscillator frequency.
- the control and processing device is connected to at least one of the sensor modules in order to adjust the filter device and / or the oscillator frequency of the sensor module with control signals. This allows the
- the phase detection device has a
- the phase detection device is set up such that the phase signal can be determined by direct sampling of the received reflected signal.
- the sensor modules are arranged along a line or flat.
- the oscillator signals of two sensor modules are adjusted by means of the control and signal processing device such that they have different oscillator frequencies.
- control and signal processing device changes the oscillator frequency of the oscillator module according to a
- the oscillator frequency of the oscillator modules is changed according to the same frequency ramp after a time offset, wherein the time offset for the individual sensor modules is different. In this way, the individual
- an FMCW (frequency modulated continuous wave) method for determining the distance of the object to the sensors can be made possible by the frequency ramp.
- a filter characteristic of a filter device of the phase detection device of at least one of the sensor modules is set such that the phase detection device only determines phase signals which are based on the signals emitted by this sensor module. This allows parallel operation of the sensor modules with high angular resolution.
- the phase detection device only detects phase signals which are based on signals radiated by a second sensor module.
- Figure 1 is a schematic representation of an embodiment of the present invention
- Figure 2 is a schematic side view of an embodiment of the present invention
- Figure 3 is a second schematic side view of the embodiment from a second orthogonal direction
- Figures 4a - 4d are schematic representations of four embodiments of a sensor module
- Figure 6 is a schematic representation of a synchronization of two oscillator devices
- Figure 7 is a schematic representation of a frequency characteristic
- FIG. 1 shows a schematic illustration of an embodiment of a present invention in a side view.
- a plurality of sensor modules 2 1 , 2 2 , 2 3 , 2 n are arranged on a support 1.
- This carrier 1 may, for. B. attached to a surface on a front side of a vehicle.
- the sensor modules 2 1 , 2 2 , 2 3 , 2 n are arranged along a spatial direction x with the distances di, d 2 .
- the distances di, d 2 can be in the range of 1 mm to 4 cm.
- the distances 2 1 , 2 2 , 2 3 , 2 n between the transmission modules 2 1 , 2 2 , 2 3 , 2 n and the object K are generally of different lengths.
- the distances S 1 , S 2 , S 3 , S n take an angle a 1 , a 2 , a 3 , a n to the direction y, which also differ. From geometrical considerations it follows that the angles a 1 , a 2 , a 3 , a n can be unambiguously determined from the lengths of the distances S 1, S 2 , S 3 , S n and the distances d 1 , d 2 .
- the angles a 1 , a 2 , a 3 , a n are also referred to as the direction of the object K to the sensor modules S 1 , S 2 , S 3 , S n .
- each sensor module 2 1 , 2 2 , 2 3 , 2 n transmits an oscillator signal having an oscillator frequency.
- These oscillator signals are from the
- each transmit module 2 1 , 2 2 , 2 3 , 2 n only takes into account the reflected signal which emerges from an oscillator signal sent by these transmit modules 2 1 , 2 2 , 2 3 , 2 n .
- Sensor modules 2 1 , 2 2 , 2 3 , 2 n specific phase differences are dependent on the lengths of the distances S 1 , S 2 , S 3 , S n between the sensor modules 2 1 , 2 2 , 2 3 , 2 n and the object K.
- the phase differences are fed as phase signals to a signal processor, which based on the differences of the phase signals, the length differences of the Distances S ⁇ S 2 , S 3 , S n and the angles a 1 , a 2 , a 3 , a n can determine.
- a relative phase information of the individual oscillator signals of the various sensor modules 2 1 , 2 2 , 2 3 , 2 n to each other is not required, only the phase difference of the respective oscillator signal to the reflected signal must be determined by the respective sensor modules.
- the angles can be determined by means of a Fourier transformation and / or adaptive methods such. For example, the so-called “minimum variance beamforming" can be determined, and corresponding methods are used for radar and sonar systems.
- ambiguities arise, which inter alia depend on the distances di, d 2 .
- d 2 of a wavelength of the oscillator signal results in an ambiguity for an angle a 1 , a 2 , a 3 , a n and the angle , which are 30 ° or smaller than the angle a 1 , a 2 , a 3 , a n .
- the angular range in which an ambiguity results is smaller and, accordingly, more ambiguities arise within the observed angular range.
- the distances di, d 2 are in the range of / 2 to 5, wherein the wavelength of the oscillator signal indicates.
- the oscillator frequencies of the individual sensor modules 2 1 , 2 2 , 2 3 , 2 n may be different. At a minimum, in one embodiment they are chosen differently for each time. In this way, an assignment of the reflected signals to the individual sensor modules 2 1 , 2 2 , 2 3 , 2 n is possible.
- a time-multiplexing method may be used in which the sensor modules 2 1 , 2 2 , 2 3 , 2 n transmit an oscillator signal offset in time from one another and receive the reflected signals.
- a further embodiment of the present invention provides that not all sensor modules 2 1 , 2 2 , 2 3 , 2 n transmit an oscillator signal.
- the sensor module 2 1 sends an oscillator signal, and the reflected components of the oscillator signal are received by the sensor modules 2 1 , 2 2 , 2 3 , 2 n .
- Phase difference of the reflected signal, which receives the sensor module 2 2, to an oscillator signal of the sensor module 2 2 is determined by the fact that the oscillator signal of the sensor module is synchronized to 2 2 the oscillator signal of the sensor module 2. 1
- the thus determined phase differences are transmitted from sensor modules 2 1 , 2 2 , 2 3 , 2 n as phase signals to a signal processing device and based on the differences of the phase signals, the lengths of the distances S 1 , S 2 , S 3 , S n and the angle a 1 , a 2 , a 3 , a n are determined.
- the advantage of a single transmitter is that neither frequency nor time division multiplexing is needed. For two or more transmitting sensor modules 2 1 , 2 2 , 2 3 , 2 n corresponding multiplexing methods are to be used.
- the sensor modules 2 1 , 2 2 , 2 3 , 2 n are arranged so that they do not all send an oscillator signal.
- a second possibility of achieving only a single quasi-active is to set the oscillator frequency of the transmission module 2 1 to a first oscillator frequency and oscillator frequencies of the other
- Sensor modules 2 1 , 2 2 , 2 3 , 2 n set to another or more other oscillator frequencies.
- a filter device which can base only phase signals with the first oscillation frequency of the sensor module 2 1 . In this way, the phase signals based on the oscillator signals of the second sensor modules 2 1 , 2 2 , 2 3 , 2 n are suppressed.
- Figure 2 shows a schematic side view of an embodiment of the present invention.
- a support 1 which may be mounted on a vehicle, a plurality of sensor modules 2 1 , 2 2 , 2 3 , 2 n spaced with the distances di, d 2 are arranged.
- a plurality of sensor modules 2 1 , 2 2 , 2 3 , 2 n spaced with the distances di, d 2 are arranged.
- Polyrods 3 can be arranged.
- the polyrod 3 are tapered dielectric rods that can be used as a co-ordinator.
- the transmission and reception angle of the sensor module is limited to about ⁇ 20 °.
- the signal processing device must be provided with corresponding calculation routines which take into account only angles within the transmission and reception angles.
- an optical lens 5 for example a cylindrical lens, the signal intensity is increased in a desired angular range and thus enables an improvement of the signal-to-noise ratio. Further suppression of the ambiguities can be achieved by a so-called quasi-optical filter 6.
- This quasi-optical filter 6 consists of a plurality of dielectric layers, which are arranged in the direction y to each other.
- the quasi-optical filter 6 has a transmission characteristic, which depends on the frequency of the signal and the angle of incidence of the signal to the quasi-optical filter 6. This is used to transmit signals with an oscillation frequency from one direction and to suppress them from other directions.
- the information about the filter characteristic is supplied to the signal processing for suppressing the ambiguities.
- FIG. 3 shows a side view of the preceding embodiment from a second spatial direction.
- An arrangement of the sensor modules 2 1 , 2 2 , 2 3 , 2 n can be done in one or more rows.
- the sensor modules can be 2 1 , 2 2 , 2 3 , 2 n individual integrated components, or can be produced together on the carrier 1 integrated.
- FIGS. 4a-d Four embodiments of a sensor module 2 are shown in FIGS. 4a-d.
- FIGS. 4a and 4b each show a heterodyne and 4c and 4d each a homodyne detection.
- a local oscillator 21a is shown, which with a
- the local oscillator 21a generates an oscillator signal having a frequency in the range of 76-81 GHz, 122-123 GHz (see above) or 126-145 GHz.
- the local oscillator 21 may be arranged so that its oscillation frequency is adjustable.
- the local oscillator 21a may include a phase-locked loop that allows synchronization of the oscillator signal with a low-frequency applied signal.
- the oscillator device is connected via a path to a transceiver device 20.
- the transmitting / receiving device 20 has an antenna device. The transmitting / receiving device can be unlocked and then sends the oscillator signal 110 via the antenna device. About the Transceiver, a reflected signal 111 can be received.
- Phase detection means 30, a second local oscillator 21 b whose oscillator signal is mixed with the oscillator signal 110 of the local oscillator 21a and the reflected signal 111 by means of two mixers 25a and 25b.
- the two signals mixed in this way are supplied to a third mixer 24, thus demultipulating the reflected signal 111 with the oscillator signal.
- the mixer 24 may be a push-pull mixer.
- the demixed signal 112 includes a phase signal 100 that depends on the phase difference of the oscillator signal 110 and the reflected signal.
- a filter device 27 is connected downstream of the mixer 24 in order to filter out higher-frequency components of the demixed signal 112.
- the filter device 27 may have an adjustable filter characteristic. The filter characteristic of the filter
- the filter characteristic of the filter 27 can have a correspondingly broad filter band.
- the filter characteristic is adjusted so that only reflected signals 111 are taken into account in the phase signal, which have the same frequency as the oscillator signal of a primary or central sensor module 2 1 .
- the coupling device 24b is replaced by a circulator device 26.
- FIGS. 4c and 4d show a homodyne detection device.
- Phase detection device 30 has in both cases only one mixing device 24.
- the mixer 24 is supplied with portions of the oscillator signal 110 and the reflected signal 111 via two coupling means 23a and 23b.
- the demixed by the mixer 24 signal 112 is as before a Filter device 27 is supplied to determine the phase signal 100.
- the coupling device 23 b is replaced by a circulator device 26.
- FIG. 5 shows a schematic representation of the signal routing of an embodiment of the present invention.
- the sensor modules 2 1 , 2 2 , 2 3 , 2 n each give their
- Phase signals 100 1 , 100 2 , 100 3 , 100 n off.
- the phase signals 100 1 , 100 2 , 100 3 , 100 n are respectively determined and output in parallel in the described frequency-division multiplexing method or in a time-multiplexing method.
- the phase signals 100 1 , 100 2 , 100 3 , 100 n are fed to a conversion device 8.
- the conversion device 8 has an analog-to-digital converter. The digitized
- Phase signals 100 1 , 100 2 , 100 3 , 100 n are supplied to a signal processing and control device 10.
- This signal processing and control device 10 determines, based on the digitized phase signals 100 1 , 100 2 , 100 3 , 100 n, the lengths of the distances S 1 , S 2 , S 3 , S n and the angles a 1 , a 2 , a 3 , a n .
- the signal processing and control device via control signals 102 1 ,
- control signals can be provided which enable the transceiver modules 20 so that the transceivers 20 send the oscillator signal 110.
- FIG. 6 shows a schematic representation of a synchronization of two oscillator devices.
- An oscillator device 21 of a first sensor module 2 1 is connected to a first phase-locked loop 29 1 .
- an oscillator device 21 2 is connected to a second phase-locked loop 29 2 .
- the phase-locked loops 29 1 and 29 2 are equipped with a low-frequency oscillator device
- the signal processing device interprets this erroneously as an angle between the signal paths S 1 , S 2 , S 3 , S n . Since the phase difference is proportional to the product of the oscillator frequency and the length of the signal path S 1 , S 2 , S 3 , S n , the errors in the angle determination increase with increasing oscillator frequency and increasing distance of the object K.
- FIG. 7 shows a further embodiment of the present invention which provides for changing the oscillator frequency w according to the illustrated frequency curve over time t.
- the frequency is changed according to one or more frequency ramps 201, 202, 203, 204 with different slope.
- the duration of a ramp is T.
- a modulation method which uses the frequency characteristic shown in FIG. 7 is the continuous-wave frequency modulation method (FMCW). This
- Frequency modulation method is suitable for use in vehicles due to its ease of implementation.
- the various slopes of the ramps 201, 202, 203, 204 make it possible to distinguish the contribution of the length of the signal path S 1 , S 2 , S 3 , S n and a Doppler shift by a moving object K to the determined phase difference.
- FIG. 8 shows the profile of the oscillator frequency for the oscillator signals of the individual sensor modules 2 1 , 2 2 , 2 3 , 2 n . These change their oscillation frequency w in accordance with the frequency characteristic of FIG. 7, but the frequency characteristics are carried out with a short time offset dt to one another. Thus, at one time all frequencies are the
- Sensor module 2 different and have at least the frequency difference dw on.
- the phase signals which are each time offset by dt can be used to evaluate the phase signals.
- An error results in the determination of the angle characterized in that the vehicle and / or the object K moves within the time span dt and thus within this period corresponding to the angle a 1 , a 2 , a 3 , a n and the signal paths S 1 , S 2 , S 3 , S n change.
- the time difference dt is significantly less than the duration T to choose a ramp.
- the modulation speed is so fast that within a period the vehicle moves only slightly and thus the errors in the angle determination remain very small.
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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
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/666,832 US7764221B2 (en) | 2004-10-29 | 2005-09-08 | Apparatus and method for determination of a direction to an object |
EP05796970A EP1810053A1 (de) | 2004-10-29 | 2005-09-08 | Sensorsystem für kraftfahrzeuge mit fmcw-radar sensoren zur winkelaufgelösten entfernungsbestimmung eines objekts mittels triangulation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004052518A DE102004052518A1 (de) | 2004-10-29 | 2004-10-29 | Vorrichtung und Verfahren zur winkelaufgelösten Entfernungs- und Geschwindigkeitsbetimmung eines Objekts |
DE102004052518.8 | 2004-10-29 |
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WO2006045668A1 true WO2006045668A1 (de) | 2006-05-04 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/EP2005/054458 WO2006045668A1 (de) | 2004-10-29 | 2005-09-08 | Sensorsystem für kraftfahrzeuge mit fmcw-radar sensoren zur winkelaufgelösten entfernungsbestimmung eines objekts mittels triangulation |
Country Status (5)
Country | Link |
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US (1) | US7764221B2 (de) |
EP (1) | EP1810053A1 (de) |
CN (1) | CN101052892A (de) |
DE (1) | DE102004052518A1 (de) |
WO (1) | WO2006045668A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1804074A1 (de) * | 2005-12-23 | 2007-07-04 | Robert Bosch Gmbh | Radarvorrichtung |
Families Citing this family (181)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8055203B2 (en) * | 2007-03-14 | 2011-11-08 | Mks Instruments, Inc. | Multipoint voltage and current probe system |
DE102007036262A1 (de) * | 2007-08-02 | 2009-02-05 | Robert Bosch Gmbh | Radarsensor für Kraftfahrzeuge |
DE102007043535A1 (de) * | 2007-09-12 | 2009-03-19 | Robert Bosch Gmbh | FMCW-Radarortungsvorrichtung und entsprechendes FMCW-Radarortungsverfahren |
DE102009045141A1 (de) | 2009-09-30 | 2011-03-31 | Robert Bosch Gmbh | Radarsensor mit IQ-Empfänger |
US8493263B2 (en) * | 2011-06-28 | 2013-07-23 | Intelligent Sciences, Ltd. | Short baseline helicopter positioning radar for low visibility using combined phased array and phase difference array receivers |
US9113347B2 (en) | 2012-12-05 | 2015-08-18 | At&T Intellectual Property I, Lp | Backhaul link for distributed antenna system |
US10009065B2 (en) | 2012-12-05 | 2018-06-26 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
DE102013205892A1 (de) * | 2013-04-03 | 2014-10-09 | Robert Bosch Gmbh | Radarvorrichtung und Verfahren zum Betrieb einer Radarvorrichtung |
US9525524B2 (en) | 2013-05-31 | 2016-12-20 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9999038B2 (en) | 2013-05-31 | 2018-06-12 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
DE102013108490A1 (de) * | 2013-08-07 | 2015-02-12 | Endress + Hauser Gmbh + Co. Kg | Dispersionskorrektur für FMCW-Radar in einem Rohr |
US8897697B1 (en) | 2013-11-06 | 2014-11-25 | At&T Intellectual Property I, Lp | Millimeter-wave surface-wave communications |
US9209902B2 (en) | 2013-12-10 | 2015-12-08 | At&T Intellectual Property I, L.P. | Quasi-optical coupler |
US9692101B2 (en) | 2014-08-26 | 2017-06-27 | At&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire |
US9768833B2 (en) | 2014-09-15 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
US10063280B2 (en) | 2014-09-17 | 2018-08-28 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9628854B2 (en) | 2014-09-29 | 2017-04-18 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing content in a communication network |
US9615269B2 (en) | 2014-10-02 | 2017-04-04 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9685992B2 (en) | 2014-10-03 | 2017-06-20 | At&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
US9503189B2 (en) | 2014-10-10 | 2016-11-22 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9973299B2 (en) | 2014-10-14 | 2018-05-15 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9762289B2 (en) | 2014-10-14 | 2017-09-12 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting or receiving signals in a transportation system |
US9577306B2 (en) | 2014-10-21 | 2017-02-21 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9627768B2 (en) | 2014-10-21 | 2017-04-18 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9653770B2 (en) | 2014-10-21 | 2017-05-16 | At&T Intellectual Property I, L.P. | Guided wave coupler, coupling module and methods for use therewith |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9312919B1 (en) | 2014-10-21 | 2016-04-12 | At&T Intellectual Property I, Lp | Transmission device with impairment compensation and methods for use therewith |
US9520945B2 (en) | 2014-10-21 | 2016-12-13 | At&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
US9654173B2 (en) | 2014-11-20 | 2017-05-16 | At&T Intellectual Property I, L.P. | Apparatus for powering a communication device and methods thereof |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US9544006B2 (en) | 2014-11-20 | 2017-01-10 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9680670B2 (en) | 2014-11-20 | 2017-06-13 | At&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US9461706B1 (en) | 2015-07-31 | 2016-10-04 | At&T Intellectual Property I, Lp | Method and apparatus for exchanging communication signals |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US10144036B2 (en) | 2015-01-30 | 2018-12-04 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium |
US9876570B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9749013B2 (en) | 2015-03-17 | 2017-08-29 | At&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
US10224981B2 (en) | 2015-04-24 | 2019-03-05 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US9793954B2 (en) | 2015-04-28 | 2017-10-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
US9948354B2 (en) | 2015-04-28 | 2018-04-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device with reflective plate and methods for use therewith |
US9490869B1 (en) | 2015-05-14 | 2016-11-08 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US10103801B2 (en) | 2015-06-03 | 2018-10-16 | At&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US9912381B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US10812174B2 (en) | 2015-06-03 | 2020-10-20 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US9913139B2 (en) | 2015-06-09 | 2018-03-06 | At&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
US9608692B2 (en) | 2015-06-11 | 2017-03-28 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US10142086B2 (en) | 2015-06-11 | 2018-11-27 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US9820146B2 (en) | 2015-06-12 | 2017-11-14 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US9509415B1 (en) | 2015-06-25 | 2016-11-29 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US9640850B2 (en) | 2015-06-25 | 2017-05-02 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US10170840B2 (en) | 2015-07-14 | 2019-01-01 | At&T Intellectual Property I, L.P. | Apparatus and methods for sending or receiving electromagnetic signals |
US10033108B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10341142B2 (en) | 2015-07-14 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US10033107B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9836957B2 (en) | 2015-07-14 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating with premises equipment |
US9628116B2 (en) | 2015-07-14 | 2017-04-18 | At&T Intellectual Property I, L.P. | Apparatus and methods for transmitting wireless signals |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US9608740B2 (en) | 2015-07-15 | 2017-03-28 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9793951B2 (en) | 2015-07-15 | 2017-10-17 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US10090606B2 (en) | 2015-07-15 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
US9749053B2 (en) | 2015-07-23 | 2017-08-29 | At&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
US10784670B2 (en) | 2015-07-23 | 2020-09-22 | At&T Intellectual Property I, L.P. | Antenna support for aligning an antenna |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US10020587B2 (en) | 2015-07-31 | 2018-07-10 | At&T Intellectual Property I, L.P. | Radial antenna and methods for use therewith |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US10136434B2 (en) | 2015-09-16 | 2018-11-20 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel |
US10009901B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method, apparatus, and computer-readable storage medium for managing utilization of wireless resources between base stations |
US10079661B2 (en) | 2015-09-16 | 2018-09-18 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a clock reference |
US10009063B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
US10051629B2 (en) | 2015-09-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
US9769128B2 (en) | 2015-09-28 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US9882277B2 (en) | 2015-10-02 | 2018-01-30 | At&T Intellectual Property I, Lp | Communication device and antenna assembly with actuated gimbal mount |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US10665942B2 (en) | 2015-10-16 | 2020-05-26 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting wireless communications |
CN105572675B (zh) * | 2016-03-04 | 2017-12-26 | 鲁东大学 | 一种汽车防撞预警方法 |
US9846228B2 (en) | 2016-04-07 | 2017-12-19 | Uhnder, Inc. | Software defined automotive radar systems |
US10261179B2 (en) | 2016-04-07 | 2019-04-16 | Uhnder, Inc. | Software defined automotive radar |
WO2017175190A1 (en) * | 2016-04-07 | 2017-10-12 | Uhnder, Inc. | Adaptive transmission and interference cancellation for mimo radar |
WO2017187304A2 (en) | 2016-04-25 | 2017-11-02 | Uhnder, Inc. | Digital frequency modulated continuous wave radar using handcrafted constant envelope modulation |
WO2017187331A1 (en) | 2016-04-25 | 2017-11-02 | Uhnder, Inc. | Vehicle radar system with a shared radar and communication system |
WO2017187278A1 (en) | 2016-04-25 | 2017-11-02 | Uhnder, Inc. | Pmcw – pmcw interference mitigation |
US9753121B1 (en) | 2016-06-20 | 2017-09-05 | Uhnder, Inc. | Power control for improved near-far performance of radar systems |
US9912419B1 (en) | 2016-08-24 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for managing a fault in a distributed antenna system |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US10291311B2 (en) | 2016-09-09 | 2019-05-14 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating a fault in a distributed antenna system |
US11032819B2 (en) | 2016-09-15 | 2021-06-08 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a control channel reference signal |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US9991580B2 (en) | 2016-10-21 | 2018-06-05 | At&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10434966B2 (en) * | 2016-10-26 | 2019-10-08 | Ford Global Technologies, Llc | Gap based airbag deployment |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10090594B2 (en) | 2016-11-23 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
US10637149B2 (en) | 2016-12-06 | 2020-04-28 | At&T Intellectual Property I, L.P. | Injection molded dielectric antenna and methods for use therewith |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10547348B2 (en) | 2016-12-07 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for switching transmission mediums in a communication system |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
US10139820B2 (en) | 2016-12-07 | 2018-11-27 | At&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US9998870B1 (en) | 2016-12-08 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus for proximity sensing |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US10908272B2 (en) | 2017-02-10 | 2021-02-02 | Uhnder, Inc. | Reduced complexity FFT-based correlation for automotive radar |
US9971020B1 (en) | 2017-02-10 | 2018-05-15 | Uhnder, Inc. | Radar data buffering |
US11454697B2 (en) | 2017-02-10 | 2022-09-27 | Uhnder, Inc. | Increasing performance of a receive pipeline of a radar with memory optimization |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US10298293B2 (en) | 2017-03-13 | 2019-05-21 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US10690769B2 (en) * | 2017-08-17 | 2020-06-23 | GM Global Technology Operations LLC | Target angle determination using vehicle radar elements with local reference signals |
DE102017218160B4 (de) * | 2017-10-11 | 2024-04-18 | Audi Ag | Verfahren zum Betrieb eines Radarsystems eines Kraftfahrzeugs und Kraftfahrzeug |
US11105890B2 (en) | 2017-12-14 | 2021-08-31 | Uhnder, Inc. | Frequency modulated signal cancellation in variable power mode for radar applications |
DE102018124503A1 (de) * | 2018-10-04 | 2020-04-09 | HELLA GmbH & Co. KGaA | Radarsystem für ein Fahrzeug |
US11474225B2 (en) | 2018-11-09 | 2022-10-18 | Uhnder, Inc. | Pulse digital mimo radar system |
DE112019006533T5 (de) * | 2019-01-31 | 2022-03-17 | Mitsubishi Electric Corporation | Radareinrichtung und signalverarbeitungsverfahren |
EP3691026B1 (de) * | 2019-02-04 | 2021-05-19 | VEGA Grieshaber KG | Antennenanordnung |
US11681017B2 (en) | 2019-03-12 | 2023-06-20 | Uhnder, Inc. | Method and apparatus for mitigation of low frequency noise in radar systems |
WO2021144711A2 (en) | 2020-01-13 | 2021-07-22 | Uhnder, Inc. | Method and system for intefrence management for digital radars |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5872536A (en) * | 1997-02-19 | 1999-02-16 | Hittite Microwave Corporation | Multi-sensor anticipatory object detection system |
WO2000008484A1 (de) * | 1998-08-06 | 2000-02-17 | Volkswagen Aktiengesellschaft | Verfahren und vorrichtung zur erfassung von objekten, insbesondere als einparkhilfe-assistenz-vorrichtung in einem kraftfahrzeug |
WO2001026183A1 (de) * | 1999-10-06 | 2001-04-12 | Robert Bosch Gmbh | Asymmetrischer, mehrstrahliger radarsensor |
US20020075178A1 (en) * | 2000-08-16 | 2002-06-20 | Woodington Walter Gordon | Radar transmitter circuitry and techniques |
US20020147534A1 (en) * | 2000-08-16 | 2002-10-10 | Delcheccolo Michael Joseph | Near object detection system |
WO2003081278A1 (de) * | 2002-03-27 | 2003-10-02 | Robert Bosch Gmbh | Einrichtung für insbesondere bistatische radaranwendungen |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1236494A (en) * | 1969-06-23 | 1971-06-23 | Marconi Co Ltd | Improvements in or relating to phase difference detectors |
US4310852A (en) * | 1980-04-08 | 1982-01-12 | General Dynamics Corp., Electronics Division | Real-time electromagnetic radiation intensity distribution imaging system |
JPS6130428A (ja) * | 1984-07-20 | 1986-02-12 | Nissan Motor Co Ltd | 車両走行制御装置 |
US4717916A (en) * | 1986-05-16 | 1988-01-05 | Holodyne Ltd., 1986 | High resolution imaging doppler interferometer |
US4818999A (en) * | 1986-10-29 | 1989-04-04 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method and apparatus for measuring frequency and phase difference |
US5654715A (en) * | 1995-12-15 | 1997-08-05 | Honda Giken Kogyo Kabushiki Kaisha | Vehicle-surroundings monitoring apparatus |
GB9602250D0 (en) * | 1996-02-05 | 1996-04-03 | Secr Defence | Collision warning system |
US5839096A (en) * | 1997-03-10 | 1998-11-17 | Hittite Microwave Corporation | Self-implementing diagnostic system |
JP3061261B2 (ja) * | 1997-04-01 | 2000-07-10 | 本田技研工業株式会社 | Fmレーダ装置 |
WO1999034234A1 (fr) * | 1997-12-25 | 1999-07-08 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Radar |
US6069581A (en) * | 1998-02-20 | 2000-05-30 | Amerigon | High performance vehicle radar system |
DE10049906A1 (de) * | 2000-10-10 | 2002-04-11 | Bosch Gmbh Robert | Sensoranordnung mit einem Puls-Echo-Radar |
JP3883847B2 (ja) * | 2001-11-19 | 2007-02-21 | 株式会社日立製作所 | 車載用信号処理装置 |
US6750810B2 (en) * | 2001-12-18 | 2004-06-15 | Hitachi, Ltd. | Monopulse radar system |
JP3988653B2 (ja) * | 2003-02-10 | 2007-10-10 | 株式会社デンソー | アンテナの配列方法、及びレーダ装置 |
-
2004
- 2004-10-29 DE DE102004052518A patent/DE102004052518A1/de not_active Ceased
-
2005
- 2005-09-08 US US11/666,832 patent/US7764221B2/en not_active Expired - Fee Related
- 2005-09-08 EP EP05796970A patent/EP1810053A1/de not_active Ceased
- 2005-09-08 CN CNA2005800376432A patent/CN101052892A/zh active Pending
- 2005-09-08 WO PCT/EP2005/054458 patent/WO2006045668A1/de active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5872536A (en) * | 1997-02-19 | 1999-02-16 | Hittite Microwave Corporation | Multi-sensor anticipatory object detection system |
WO2000008484A1 (de) * | 1998-08-06 | 2000-02-17 | Volkswagen Aktiengesellschaft | Verfahren und vorrichtung zur erfassung von objekten, insbesondere als einparkhilfe-assistenz-vorrichtung in einem kraftfahrzeug |
WO2001026183A1 (de) * | 1999-10-06 | 2001-04-12 | Robert Bosch Gmbh | Asymmetrischer, mehrstrahliger radarsensor |
US20020075178A1 (en) * | 2000-08-16 | 2002-06-20 | Woodington Walter Gordon | Radar transmitter circuitry and techniques |
US20020147534A1 (en) * | 2000-08-16 | 2002-10-10 | Delcheccolo Michael Joseph | Near object detection system |
WO2003081278A1 (de) * | 2002-03-27 | 2003-10-02 | Robert Bosch Gmbh | Einrichtung für insbesondere bistatische radaranwendungen |
Non-Patent Citations (2)
Title |
---|
KLOTZ M ET AL: "A 24 GHz short range radar network for automotive applications", RADAR, 2001 CIE INTERNATIONAL CONFERENCE ON, PROCEEDINGS OCT 15-18, 2001, PISCATAWAY, NJ, USA,IEEE, 15 October 2001 (2001-10-15), pages 115 - 119, XP010577783, ISBN: 0-7803-7000-7 * |
ROHLING H ET AL: "Waveform design principles for automotive radar systems", RADAR, 2001 CIE INTERNATIONAL CONFERENCE ON, PROCEEDINGS OCT 15-18, 2001, PISCATAWAY, NJ, USA,IEEE, 15 October 2001 (2001-10-15), pages 1 - 4, XP010577760, ISBN: 0-7803-7000-7 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1804074A1 (de) * | 2005-12-23 | 2007-07-04 | Robert Bosch Gmbh | Radarvorrichtung |
Also Published As
Publication number | Publication date |
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US20080150790A1 (en) | 2008-06-26 |
DE102004052518A1 (de) | 2006-05-04 |
EP1810053A1 (de) | 2007-07-25 |
US7764221B2 (en) | 2010-07-27 |
CN101052892A (zh) | 2007-10-10 |
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