JP6659400B2 - Signal processing device, radar device, and method of setting radar device - Google Patents

Description

  An embodiment of the present invention relates to a signal processing device, a radar device, and a method for setting a radar device.

  Conventionally, an array antenna device in which a plurality of antenna elements are arranged has been known. In this array antenna apparatus, the amplitude and phase of the received signal generated by each antenna element may vary due to an error in the shape of the antenna element or the like or an error in the mounting position of the antenna element.

JP-A-2002-243783

  The problem to be solved by the present invention is to provide a signal processing device, a radar device, and a method of setting a radar device that can suppress signal variations among a plurality of antenna elements.

The signal processing device according to the embodiment includes a setting unit, a correction unit, and a processing unit. The setting unit sets a coefficient for correcting an amplitude and a phase of a reception signal supplied from each of the plurality of antenna units arranged in the first direction for each of the antenna units. The correction unit corrects the received signal supplied from the antenna unit based on a coefficient corresponding to the antenna unit set by the setting unit. The processing unit generates reception data based on the plurality of reception signals corrected by the correction unit. The setting unit generates one-dimensional data including an amplitude and a phase corresponding to each of the plurality of antenna units based on the reception data generated by the processing unit, and generates the one-dimensional data and the generated primary data. based on the comparison of the reference data which is expected value of the original data, which sets the coefficient for each of the antenna unit, two-dimensional wavefront data by executing the inverse Fourier transform on the received data Is generated, two-dimensional first directivity data is generated by performing a Fourier transform on the generated wavefront data, and an inverse Fourier transform is performed on the generated first directivity data. Thus, the one-dimensional data is generated .

FIG. 1 is a diagram illustrating an example of a radar device 1 according to an embodiment. FIG. 2 is a diagram illustrating an example of an array antenna unit 10 according to the embodiment. 5 is a flowchart illustrating a flow of a process of calculating a correction coefficient in the radar device 1 according to the embodiment. FIG. 4 is a diagram illustrating an example of one-dimensional wavefront data reproduced by a setting unit 60 in the embodiment. FIG. 4 is a diagram illustrating an example of a beamforming coefficient (reference data) in the embodiment. FIG. 3 is a diagram illustrating an example of two-dimensional wavefront data according to the embodiment. 9 is a flowchart showing another flow of a process for calculating a correction coefficient in the radar device 1 of the embodiment.

  Hereinafter, a signal processing device, a radar device, and a method of setting the radar device according to the embodiment will be described with reference to the drawings.

  The radar apparatus 1 according to the embodiment scans a transmission beam in a three-dimensional detection range by changing an angle at which the transmission beam is emitted (hereinafter, referred to as a directivity angle). Thereby, the radar device 1 observes a weather phenomenon such as rain and clouds, for example.

  FIG. 1 is a diagram illustrating an example of a radar device 1 according to the embodiment. The radar device 1 includes an array antenna unit 10, signal processing units 20-1, 20-2,..., And 20-n, and correction units 30-1, 30-2,. Includes a natural number of 1 or more), a data processing unit 40, a radar processing unit 50, and a setting unit 60, but is not limited thereto. In the following description, when the signal processing unit is not distinguished from other signal processing units, it is described as “signal processing unit 20”. In the following description, when the correction unit is not distinguished from other correction units, it is described as “correction unit 30”. In the embodiment, the signal processing unit 20, the correction unit 30, the data processing unit 40, and the setting unit 60 function as a signal processing device that processes a received signal.

  The array antenna unit 10 includes a plurality of antenna units 100-1, 100-2,... And 100-n. In the following description, when an antenna unit is not distinguished from other antenna units, it is described as “antenna unit 100”.

  FIG. 2 is a diagram illustrating an example of the array antenna unit 10 according to the embodiment. The Y direction in FIG. 2 is the elevation direction (directivity angle) of the radar device 1. The X direction in FIG. 2 is the azimuth direction of the radar device 1. In the following description, the elevation angle of the radar device 1 will be described as a directivity angle, but is not limited thereto. The azimuth of the radar device 1 may be a directional angle.

  , And 100-n include waveguides 101-1,..., And 101-n, and slots 102-1,..., And 102-m (where m is one or more). , And 103-n, but are not limited to these. In the following description, when a waveguide is not distinguished from other waveguides, it is described as “waveguide 101”. In the following description, when a slot is not distinguished from other slots, it is described as “slot section 102”. In the following description, when the signal output terminal is not distinguished from other signal output terminals, it is described as “signal output terminal 103”.

  The plurality of waveguides 101 are arranged with the side surfaces in the longitudinal direction of the waveguides 101 facing each other. In each antenna unit 100, a plurality of slot portions 102 are formed on a transmitting / receiving surface of an electromagnetic wave. Each slot section 102 includes a pair of slots (antenna elements). The pair of slots are formed so that their inclination angles are opposite to each other. The plurality of slots 102 are arranged apart from each other in the X direction. The slot unit 102 excites when an electromagnetic wave (hereinafter, referred to as an incoming wave) arrives at the array antenna unit 10, and transmits a signal corresponding to the intensity of the incoming wave to the signal output terminal 103.

  A signal having an amplitude corresponding to the intensity of the incoming wave is transmitted to the signal output terminal 103. The signal transmitted to the signal output terminal 103 is a signal on which a signal generated by excitation of the plurality of slot units 102 is superimposed. The signal output terminal 103 functions as a combining unit that combines signals based on electromagnetic waves received by the plurality of antenna elements to generate a received signal. The signal transmitted to the signal output terminal 103 is detected by the signal processing unit 20 as received signals S (y1),... And S (yn). Thereby, the array antenna unit 10 functions as an array antenna in which the plurality of slot units 102 (antenna elements) are arranged in an array in a two-dimensional direction.

  The signal processing unit 20 is connected to the antenna unit 100 of the array antenna unit 10. The signal processing unit 20 includes, but is not limited to, a receiving amplifier, a bandpass filter, an A / D converter, a DDC (Digital Down Converter), an NCO (Numerically Controlled Oscillator), and the like.

  The reception signal generated by the antenna unit 100 is supplied to a reception amplifier. The receiving amplifier amplifies the amplitude of the received signal. The BPF passes a received signal in a desired frequency band among the frequency bands of the received signal that is an analog signal. The A / D converter converts the received signal that has passed through the BPF into a digital signal. The DDC outputs a reception signal having a value corresponding to the amplitude of a desired frequency component among the reception signals converted into a digital signal based on the pseudo signal generated by the NCO.

The correction unit 30 is a multiplier. The correction unit 30 receives the received signal output by the signal processing unit 20. The correction unit 30 multiplies a complex number a + bi set in correspondence with the array antenna unit 10. The amplitude component is (a ² + b ² ) ^1/2 and the phase component is tan ⁻¹ (b / a). Note that i represents an imaginary component.

  The correction unit 30 receives the correction coefficient output from the setting unit 60. The correction unit 30 multiplies the received signal by the correction coefficient input from the setting unit 60. The correction unit 30 outputs the received signal multiplied by the correction coefficient to the data processing unit 40. In the embodiment, a plurality of correction units 30 are provided corresponding to the array antenna unit 10, but the present invention is not limited to this. The correction unit 30 may include an arithmetic unit, and multiply a reception signal and a transmission signal corresponding to each of the array antenna units 10 by a correction coefficient corresponding to the array antenna unit 10.

  The data processing unit 40 is a combiner of the received signal. The data processing unit 40 outputs received data obtained by synthesizing the received signals output by the correction unit 30 to the radar processing unit 50 and the setting unit 60. The reception data is data obtained by synthesizing reception signals received substantially simultaneously by the plurality of antenna units 100.

  The data processing unit 40 multiplies the reception signals received almost simultaneously by the antenna unit 100 by a beamforming coefficient before combining the reception signals. FIG. 5 is a diagram illustrating an example of a beamforming coefficient (reference data) in the embodiment.

  The beamforming coefficient will be described. As the amplitude component in the beamforming coefficient, a value based on the directivity of the radar device 1 is set. In the beam forming coefficient of FIG. 5, the amplitude component corresponding to the antenna unit 100 located at the center of the array antenna unit 10 in the array antenna unit 10 is set high. Further, in the beamforming coefficient of FIG. 5, the amplitude component corresponding to the antenna unit 100 located from the center to the end of the array antenna unit 10 in the array antenna unit 10 is set low. In the beamforming coefficient of FIG. 5, the phase component is set to a value corresponding to the amount of phase change based on the direction of the directional angle of the array antenna unit 10 (also referred to as the beam direction).

  The radar processing unit 50 and the setting unit 60 are realized by a processor such as a CPU (Central Processing Unit) executing a program stored in a program memory, but are not limited thereto. In the radar processing unit 50, some or all of these functional units are realized by hardware such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array). May be done. The radar processing unit 50 performs a reception process using the reception data input from the data processing unit 40. The radar processing unit 50 performs, for example, a process of analyzing an incoming wave received by the antenna unit 100 as a reception process.

  The setting unit 60 sets a coefficient (hereinafter, referred to as a correction coefficient) for correcting the amplitude and phase of the received signal supplied from each of the plurality of antenna units 100, for each antenna unit 100. The setting unit 60 transmits a plurality of correction coefficients set for each antenna unit 100 to the correction unit 30 corresponding to the antenna unit 100.

  Hereinafter, a flow of calculating a correction coefficient by the radar device 1 of the embodiment will be described. FIG. 3 is a flowchart illustrating a flow of a process of calculating a correction coefficient in the radar device 1 according to the embodiment.

  First, the radar device 1 specifies a directional angle by setting a beamforming coefficient in the data processing unit 40. The directional angle is an azimuth angle / elevation angle at which the receiving sensitivity is highest. At this time, the radar device 1 is placed in an anechoic chamber. A beam is incident on the radar device 1 from a transmission probe installed in an anechoic chamber arranged at a predetermined position (x, y) with respect to the reception surface of the array antenna unit 10.

  Next, the radar device 1 generates reception data α (x, y) based on the arriving wave arriving at the array antenna unit 10 (Step S102). The reception data α represents a value obtained by synthesizing a signal incident from a transmission probe in an anechoic chamber arranged two-dimensionally (x, y).

  Next, the setting unit 60 performs two-dimensional wavefront data (a + bi) (m, n) by performing an inverse Fourier transform on the received data generated in step S102 (step S104). FIG. 6 is a diagram illustrating two-dimensional wavefront data in the embodiment. The two-dimensional wavefront data includes an amplitude component and a phase component corresponding to the slot 102 arranged two-dimensionally (m, n). That is, the two-dimensional wavefront data is represented by (a + bi) (m, n) corresponding to a combination of the N array antenna units 10 arranged in the Y direction and the M slot units 102 arranged in the X direction. expressed. Note that “i” means that bi represents an imaginary part of a complex number representation.

The setting unit 60 calculates two-dimensional wavefront data g (ξ) from the reception data (measurement data) by performing trapezoidal integration represented by the following Expression 1. That is, the setting unit 60 performs generation of two-dimensional wavefront data by Fourier inverse transform using Fourier integration.式 in Equation 1 is represented by an antenna length a and a coordinate x on the antenna as in Equation 2. The antenna length a is the length of the array antenna unit 10 in the elevation angle direction. The coordinate x on the antenna is the position of the array antenna unit 10 in the antenna unit 100 in the elevation angle direction. U in Equation 1 is represented by the antenna length a, the transmission / reception angle θ of the array antenna unit 10, and the wavelength λ of the transmitted electromagnetic wave as in Equation 3. The radar device 1 performs transmission and reception of the electromagnetic wave in the θ coordinate system, and converts the electromagnetic wave to the u coordinate system by Expression 3.

二次元波指向性データは、式４に示すように、波面データをフーリエ変換することで求められる。波面データは、式５に示すように、二次元指向性データをフーリエ逆変換することで求められる。設定部６０は、式４に示すように二次元波面データに対してフーリエ変換することで、二次元指向性データを生成する。 Next, the setting unit 60 performs a Fourier transform on the two-dimensional wavefront data generated in step S104 to generate two-dimensional directivity data β (θ, φ) (step S106). That is, the setting unit 60 calculates the two-dimensional directivity of the radar device 1. The two-dimensional directivity data has a value corresponding to the signal magnitude for each combination of the directivity angle (elevation angle) θ and the azimuth angle φ. θ and φ are represented by relative angles with respect to the reference angle. Equation 4 is an equation representing the directivity f (u). Equation 5 below is an equation representing the wavefront data g (ξ).

The two-dimensional wave directivity data is obtained by Fourier transforming the wavefront data as shown in Expression 4. The wavefront data is obtained by inverse Fourier transform of the two-dimensional directivity data as shown in Expression 5. The setting unit 60 generates two-dimensional directivity data by performing Fourier transform on the two-dimensional wavefront data as shown in Expression 4.

The setting unit 60 performs a Fourier transform using a Fourier series to calculate the sensitivity at the transmission / reception angle θ from the two-dimensional wavefront data. Equation 6 is an equation representing the directivity at θ corresponding to the element number of the antenna unit 100. The setting unit 60 converts the u coordinate system into the θ coordinate system by Expression 3 in order to express the transmission / reception angle in the θ coordinate system as shown in Expression 6.

  Next, the setting unit 60 performs an inverse Fourier transform on the directional data of the specific azimuth selected from the received data generated in step S106, and reproduces the one-dimensional wavefront data (c + di) (n). (Step S108). That is, the setting unit 60 performs one-dimensional directivity selection and one-dimensional wavefront generation. The one-dimensional wavefront data has an amplitude component and a phase component for each element assigned to the array antenna unit 10.

  Next, the setting unit 60 compares the one-dimensional wavefront data reproduced in step S108 with the reference data (step S110). FIG. 4 is a diagram illustrating an example of one-dimensional wavefront data reproduced by the setting unit 60 in the embodiment. FIG. 5 is a diagram illustrating an example of one-dimensional wavefront data serving as a reference in the embodiment. The reference one-dimensional wavefront data is reference data that is an expected value of the one-dimensional wavefront data. The reference data has Taylor characteristics, but is not limited thereto. 4 and 5, the element numbers are numbers assigned in the order of arrangement of the antenna units 100. The number of the antenna units 100 is 128, but is not limited thereto. The setting unit 60 compares the amplitude of the reference data corresponding to the element number with the amplitude corresponding to the same element number in the reproduced one-dimensional wavefront data. The setting unit 60 compares the phase of the reference data corresponding to the element number with the phase corresponding to the same element number in the reproduced one-dimensional wavefront data.

  Next, the setting unit 60 sets a correction coefficient based on the comparison result in step S110 (step S112). That is, the setting unit 60 generates a one-dimensional correction value. The setting unit 60 generates a correction coefficient for matching the amplitude of the reproduced one-dimensional wavefront data with the amplitude of the reference data for each element number. The setting unit 60 calculates the ratio of the amplitude of the reference data to the amplitude of the reproduced one-dimensional wavefront data for each element number. The setting unit 60 calculates the ratio of the phase of the reference data to the phase of the reproduced one-dimensional wavefront data for each element number. The setting unit 60 determines a reciprocal obtained by adding the amplitude ratio and the phase ratio for each element number as a correction coefficient for each element number.

  Next, the setting unit 60 determines whether to select the next directional angle (step S114). That is, the setting unit 60 determines whether or not to perform measurement at another directional angle. At this time, when the array antenna unit 10 receives an electromagnetic wave having a directional angle different from the directional angle of the electromagnetic wave output in step S100, the setting unit 60 returns the process to step S100.

  The radar apparatus 1 specifies a directional angle (W-2) having an elevation angle different from the directional angle (W-1) for the array antenna unit 10 (step S100). The radar device 1 performs the processing from step S102 to step S112 according to the designation of the directivity angle (W-2). Thereby, the radar apparatus 1 sets a correction coefficient corresponding to an elevation angle different from the directivity angle (W-1). Further, the radar apparatus 1 specifies a directional angle (W-3) having a different elevation angle from the directional angles (W-1 and W-2) for the array antenna unit 10 (step S100). The radar device 1 performs the processing from step S102 to step S112 according to the designation of the directivity angle (W-3). Thereby, the radar apparatus 1 sets a correction coefficient corresponding to an elevation angle different from the directivity angles (W-1 and W-2).

  The setting unit 60 sets a correction coefficient corresponding to the elevation angle of the radar device 1. Thereby, the correction unit 30 can select the correction coefficient corresponding to the elevation angle of the radar device 1 and correct the received signal. That is, the radar apparatus 1 selects a correction coefficient corresponding to the elevation angle of the directional angle, and electronically scans the three-dimensional observation space in each azimuth.

  The radar apparatus 1 may determine the validity of the one-dimensional directivity data in the above-described calculation processing of the correction coefficient. That is, the radar device 1 may verify the validity of the one-dimensional directivity data. FIG. 7 is a flowchart illustrating another flow of a process of calculating a correction coefficient in the radar device 1 according to the embodiment.

  The setting unit 60 reproduces the one-dimensional directivity data by performing an inverse Fourier transform of the one-dimensional wavefront data reproduced in step S108 (step S120). At this time, when reproducing the one-dimensional directivity data, the setting unit 60 cancels the amplitude and phase corresponding to the reception scanning loss from the one-dimensional wavefront data. At this time, for example, the setting unit 60 divides the one-dimensional wavefront data by the amplitude and phase corresponding to the reception scanning loss. The setting unit 60 reproduces the one-dimensional directivity data by performing an inverse Fourier transform on the one-dimensional directivity data from which the reception scanning loss has been canceled. The setting unit 60 adds the amplitude and phase corresponding to the reception scanning loss to the reproduced one-dimensional directivity data. At this time, for example, the setting unit 60 multiplies the one-dimensional directivity data subjected to the inverse Fourier transform by the amplitude and the phase corresponding to the reception scanning loss.

  The setting unit 60 determines whether the one-dimensional directivity data reproduced in Step S120 is appropriate (Step S122). That is, the setting unit 60 determines whether or not the reproduction result of the one-dimensional directivity data is appropriate. At this time, the setting unit 60 compares the one-dimensional directivity data reproduced in step S120 with the one-dimensional directivity data generated in step S106. For example, the setting unit 60 compares the amplitudes of the two-dimensional directivity data for each element number, and determines that the reproduction result is not appropriate if there is an error equal to or more than a predetermined value. Similarly, for example, the setting unit 60 compares the phases of the two-dimensional directivity data for each element number, and determines that the reproduction result is not appropriate if there is an error equal to or more than a predetermined value. The setting unit 60 determines that the reproduction result is valid when both the comparison result for the amplitude and the comparison result for the phase are valid. Thereby, the radar device 1 can determine that the one-dimensional wavefront data is correctly reproduced when both the one-dimensional directivity data match.

  If the reproduced one-dimensional directivity data is not appropriate, the setting unit 60 returns the process to step S100. As a result, the setting unit 60 reproduces (re-measures) the one-dimensional wavefront data (steps S100 to S108), and determines validity again (steps S120 and S122).

  The radar device 1 according to the embodiment described above generates one-dimensional data including a plurality of amplitudes and phases corresponding to the plurality of array antenna units 10 based on the reception data corresponding to the array antenna unit 10. The radar device 1 sets a correction coefficient for each array antenna unit 10 based on a comparison result between the one-dimensional data and the reference data. As a result, according to the radar apparatus 1, it is possible to suppress a variation in signals among a plurality of antenna elements due to a manufacturing error for each array antenna unit 10.

  That is, ideally, it is desirable that the amplitude distribution and the phase as shown in FIG. 5 are constant. However, due to a manufacturing error of the array antenna section 10, as shown in FIG. Occurs and the phase shifts. The manufacturing error includes, for example, a variation in element shape and resistance value in a component corresponding to the array antenna unit 10, and an error in a mounting position and an angle of the component. Variations occur in the capacitor component and the inductor component of the component based on the manufacturing error, and the amplitude and phase of the received signal change due to the capacitor component and the inductor component.

  On the other hand, the radar apparatus 1 according to the embodiment generates one-dimensional wavefront data representing the amplitude and phase corresponding to the plurality of array antenna units 10 based on the received data, and compares the one-dimensional wavefront data with the reference data. To set the correction coefficient. Thus, according to the radar device 1, by multiplying the received signals corresponding to the plurality of array antenna units 10 by the correction coefficient, it is possible to suppress variations in amplitude and phase.

  Further, according to the radar apparatus 1 of the embodiment, the two-dimensional wavefront data (two-dimensional wavefront data) is generated by performing the inverse Fourier transform on the received data, and the generated two-dimensional wavefront data is Fourier-transformed. By performing the conversion, two-dimensional first directional data (two-dimensional directional data) is generated, and the generated two-dimensional directional data is subjected to Fourier inverse transform to obtain one-dimensional data (one-dimensional data). (Wavefront data). Thereby, according to the radar apparatus 1, the one-dimensional wavefront data representing the variation in the amplitude and the phase of the received signal is generated for each array antenna unit 10, whereby the correction for suppressing the variation in the amplitude and the phase of the received signal is performed. The coefficients can be calculated.

  Furthermore, according to the radar apparatus 1 of the embodiment, two-dimensional wavefront data is generated by performing the inverse Fourier transform on the received data, and the two-dimensional wavefront data is generated by performing the Fourier transform on the generated wavefront data. The first directional data is generated, and one-dimensional data is generated by performing an inverse Fourier transform on the generated directional data. However, the present invention is not limited to this. According to the radar device 1 of the embodiment, one-dimensional data may be generated by performing an operation on the received data using a predetermined function instead of the above-described operation.

  Furthermore, according to the radar device 1 of the embodiment, when transmitting an electromagnetic wave, the transmission signal may be multiplied by a correction coefficient. As a result, according to the radar device 1, it is possible to suppress variations in the amplitude and phase of the transmission signal for each array antenna unit 10.

  Further, according to the radar apparatus 1 of the embodiment, the correction coefficient is set for each directional angle, and the received signal is corrected based on the correction coefficient corresponding to the directional angle. The amplitude and phase of the signal can be corrected.

  Further, according to the radar device 1 of the embodiment, the second directional data is generated by performing the Fourier inverse transform on the one-dimensional data, and the generated second directional data and the first directional data are generated. If they match, a correction coefficient is set for each array antenna unit 10. On the other hand, the radar device 1 generates the one-dimensional data again when the generated second directional data does not match the first directional data. Thus, according to the radar apparatus 1, since the correction coefficient is calculated when the calculation for reproducing the one-dimensional data is appropriate, the accuracy of correction of the received signal can be increased.

  Furthermore, the radar apparatus 1 of the embodiment combines a plurality of antenna elements (slots 102) arranged in the second direction (X direction) with signals based on electromagnetic waves received by the plurality of antenna elements, An antenna unit 100 having a combining unit (signal output terminal 103) for generating a reception signal is arranged in the Y direction. The radar apparatus 1 sets a correction coefficient corresponding to the array antenna unit 10 based on the reception signals generated by the array antenna units 10 arranged in the Y direction even in such an array antenna unit 10. be able to.

  Further, according to the embodiment, it is possible to realize a setting method of setting a correction coefficient in the radar device 1. That is, according to the embodiment, the plurality of array antenna units 10 emit electromagnetic waves, and the plurality of array antenna units 10 receive incoming waves. According to the embodiment, when the correction coefficient is set, the plurality of array antennas are set based on the reception data generated by the plurality of array antenna units 10 in response to the arrival waves being received by the plurality of array antenna units 10. One-dimensional data including a plurality of amplitudes and phases corresponding to the respective units is generated, and a correction coefficient is set for each array antenna unit based on a comparison result between the one-dimensional data and the reference data. Thus, according to the embodiment, by setting a correction coefficient in the radar device 1, the radar device 1 in which the signal variation among a plurality of antenna elements due to a manufacturing error is suppressed for each array antenna unit 10 is manufactured. be able to.

  According to at least one embodiment described above, a coefficient for correcting the amplitude and phase of the received signal supplied from each of the plurality of array antenna units 10 arranged in the first direction is set for each array antenna unit 10. Setting section 60, correction section 30 for correcting a received signal based on a coefficient corresponding to array antenna section 10 set by setting section 60, and reception data based on a plurality of reception signals corrected by correction section 30. And a one-dimensional data including a plurality of amplitudes and phases respectively corresponding to the plurality of array antenna units 10 based on the reception data generated by the data processing unit 40. By having a setting unit 60 for setting a coefficient for each array antenna unit 10 based on a comparison result between the original data and the reference data, It is possible to suppress the variation of the signal between the array antenna unit 10 of the number.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Radar apparatus, 10 ... Array antenna part, 20 ... Signal processing part, 30 ... Correction part, 40 ... Data processing part, 60 ... Setting part, 100 ... Antenna unit, 101 ... Waveguide, 102 ... Slot part, 103 … Signal output terminal

Claims (7)

A setting unit that sets, for each of the antenna units, a coefficient for correcting an amplitude and a phase of a reception signal supplied from each of the plurality of antenna units arranged in the first direction;
A correction unit that corrects the received signal supplied from the antenna unit based on a coefficient corresponding to the antenna unit set by the setting unit,
A processing unit that generates reception data based on the plurality of reception signals corrected by the correction unit,
The setting unit includes:
Generating one-dimensional data including an amplitude and a phase corresponding to each of the plurality of antenna units based on the reception data generated by the processing unit; and expecting the generated one-dimensional data and the generated one-dimensional data. in based on the comparison of the reference data which is for setting the coefficients for each of the antenna unit,
Generate two-dimensional wavefront data by performing an inverse Fourier transform on the received data, and generate a two-dimensional first directivity data by performing a Fourier transform on the generated wavefront data. Generating the one-dimensional data by performing an inverse Fourier transform on the generated first directional data,
Signal processing device. A setting unit that sets, for each of the antenna units, a coefficient for correcting an amplitude and a phase of a reception signal supplied from each of the plurality of antenna units arranged in the first direction;
A correction unit that corrects the received signal supplied from the antenna unit based on a coefficient corresponding to the antenna unit set by the setting unit,
A processing unit that generates reception data based on the plurality of reception signals corrected by the correction unit,
The setting unit includes:
Generating one-dimensional data including an amplitude and a phase corresponding to each of the plurality of antenna units based on the reception data generated by the processing unit; and expecting the generated one-dimensional data and the generated one-dimensional data. in based on the comparison of the reference data which is for setting the coefficients for each of the antenna unit,
Setting the coefficients for each orientation angle of the own apparatus among the first direction,
Wherein the correction unit corrects the reception signal based on the coefficient corresponding to the directivity angle of the antenna unit,
Signal processing device. The correction unit, based on the coefficient set by the setting unit , to correct the transmission signal supplied to each of the plurality of antenna units ,
The signal processing device according to claim 1 . A setting unit that sets, for each of the antenna units, a coefficient for correcting an amplitude and a phase of a reception signal supplied from each of the plurality of antenna units arranged in the first direction;
A correction unit that corrects the received signal supplied from the antenna unit based on a coefficient corresponding to the antenna unit set by the setting unit,
A processing unit that generates reception data based on the plurality of reception signals corrected by the correction unit,
The setting unit includes:
Generating one-dimensional data including an amplitude and a phase corresponding to each of the plurality of antenna units based on the reception data generated by the processing unit; and expecting the generated one-dimensional data and the generated one-dimensional data. in based on the comparison of the reference data which is for setting the coefficients for each of the antenna unit,
Generate two-dimensional wavefront data by performing an inverse Fourier transform on the received data, and generate a two-dimensional first directivity data by performing a Fourier transform on the generated wavefront data. Generating the one-dimensional data by performing an inverse Fourier transform on the generated first directional data,
The second directional data is generated by performing Fourier inverse transform on the one-dimensional data, and when the generated second directional data and the first directional data match, the coefficient is calculated. The one-dimensional data is set again for each of the antenna units, and when the generated second directional data does not match the first directional data, the one-dimensional data is generated again.
Signal processing device. The antenna unit includes:
A plurality of antenna elements arranged in a second direction intersecting the first direction;
A combining unit that combines signals based on electromagnetic waves received by the plurality of antenna elements to generate the received signal,
The signal processing device according to any one of claims 1 to 4 , further comprising: A plurality of antenna units arranged in a first direction;
A setting unit that sets a coefficient for correcting the amplitude and phase of the received signal supplied from each of the plurality of antenna units, for each of the antenna units,
A correction unit that corrects the received signal supplied from the antenna unit based on a coefficient corresponding to the antenna unit set by the setting unit,
A processing unit that generates reception data based on the plurality of reception signals corrected by the correction unit,
The setting unit includes:
Generating one-dimensional data including an amplitude and a phase corresponding to each of the plurality of antenna units based on the reception data generated by the processing unit; and expecting the generated one-dimensional data and the generated one-dimensional data. in based on the comparison of the reference data which is for setting the coefficients for each of the antenna unit,
Generate two-dimensional wavefront data by performing an inverse Fourier transform on the received data, and generate a two-dimensional first directivity data by performing a Fourier transform on the generated wavefront data. Generating the one-dimensional data by performing an inverse Fourier transform on the generated first directional data,
Radar equipment. Causing the plurality of antenna units arranged in the first direction to emit electromagnetic waves;
Causing the plurality of antenna units to receive an incoming wave;
Setting a coefficient for correcting the amplitude and phase of the received signal supplied from each of the plurality of antenna units, for each of the antenna units,
The step of setting the coefficient includes:
One-dimensional data including a plurality of amplitudes and phases respectively corresponding to the plurality of antenna units is generated based on the reception data generated by the plurality of antenna units in response to the arrival waves being received by the plurality of antenna units. , based on the comparison of the reference data is the expected value of the one-dimensional data and the generated one-dimensional data the product, a step of setting the coefficient for each of the antenna unit,
Generate two-dimensional wavefront data by performing an inverse Fourier transform on the received data, and generate a two-dimensional first directivity data by performing a Fourier transform on the generated wavefront data. Generating the one-dimensional data by performing an inverse Fourier transform on the generated first directional data.
Setting method of radar equipment.

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