JPH07280924A - Pseudo-target-signal generation apparatus - Google Patents

Abstract

PURPOSE:To change the number of targets which can be radiated simultaneously and to change an angular resolution by controlling a switch and a switching device electrically without changing the constitution and the arrangement of an array antenna. CONSTITUTION:The input system of a switch 20 is increased to the number of terminals corresponding to the number of targets, and a switching device 19 which electrically changes over the number of targets and an angular resolution is installed. Then, when the number of targets is expanded from two to four, the usage form of the switch 10 and the switching device 19 is changed over, and an element corresponding to a target 1 is newly allocated to the target 1 and a target 3. Regarding a target 2, an element antenna corresponding to a total of four targets can be arranged in the same manner. At this time, an element interval is set at 1.4 times, and the angular resolution can be expanded in the same manner. As a result, when the number of targets is increased or decreased, the angular resolution can be changed. In this manner, the number of targets which can be radiated simultaneously can be expanded to four, eight,..., and the angular resolution can be controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of expanding the number of pseudo targets and controlling the angular resolution, which has been impossible in the past, in a pseudo target signal generator for simulating the reflected waves of radio waves transmitted from radar. The present invention also relates to an apparatus capable of generating radio wave specifications such as signal strength, radiation angle, and delay time of the generated pseudo target signal as a signal suitable for the actual environment.

[0002]

2. Description of the Related Art FIG. 11 is a diagram showing a configuration of a conventional pseudo target signal generator, FIG. 12 is a diagram showing an internal configuration of an antenna control unit which is a part of FIG. 11, and FIG. FIG. 14 is a diagram showing the configuration of the switch of the radiating unit, which is a unit, and the array antenna, and FIG. 14 is a diagram for explaining the operation of the radiating unit. In FIG. 11, 1 is a radio wave source that generates a pseudo target signal, 8 is a power attenuator that controls the power of the pseudo target signal, and 1
2 is a power distribution unit that distributes the power of the pseudo target signal to a plurality of systems corresponding to the array antenna, 15 is a phase shift unit that controls the phase of the pseudo target signal of each of the distributed systems, and 20 is a system of each of the above systems. A radiation unit for radiating a pseudo target signal into the space from an angle corresponding to the target position, and 23 is the above 8, 12, 1
This is an antenna control unit that controls 5, 20.

The radio wave source 1 will be described with reference to FIG. 2 is a Doppler generator that generates a signal having a Doppler frequency according to the relative speed of the ship and the target, and 3 is clutter generation that generates a clutter signal that is a reflection from the ground or sea surface according to the speed and altitude of the ship Part 4 is 2 above
And a pulse modulator 5 which generates a reception pulse corresponding to a radar transmission pulse from the pseudo target signal generated in 3 and 3 is a pulse delay control for adding a delay time corresponding to the distance between itself and the target to the modulation pulse. Reference numeral 7 denotes a power amplifier that amplifies the pseudo target signal, which is the output of 4, to the intensity necessary for radiating into space. Externally input to the radio wave source are motion characteristics such as the velocity and altitude of the aircraft and the target, and an RF reference signal and a transmission pulse to maintain coherency with the radar. In No. 1, the Doppler frequency is calculated from the relative velocity between the own device and the target and the wavelength of the transmission signal of the radar, and the reflected wave from the target is generated in addition to the RF reference signal from the radar. Two
Then, the signal strength and frequency band of the reflected wave of the radar transmitted wave from the ground surface or the sea surface are calculated from the velocity and altitude of the aircraft, and the clutter is added to the RF signal in the same manner as in 1.
In step 5, the time required for the radio wave to make a round trip is calculated from the distance between itself and the target, and a delay corresponding to the above time is added from the timing when the pulse is transmitted from the radar. In 4, the reflected waves from the target and clutter are pulse-modulated by the pulse to generate a pseudo target signal. The power amplifying unit 7 amplifies the pseudo target signal to a sufficient level in consideration of the antenna feeding system loss and the span loss in the space after radiation.

The power attenuator 8 shown in FIG. 11 will be described. Reference numeral 9 is a variable power attenuator that controls the power of the pseudo target signal generated by the radio wave source, and 10 is a power attenuation control unit that generates a control signal for the variable power attenuator. The power attenuation control unit generates the control signal 9 based on the power attenuation amount information from the antenna control unit 23.

Referring to FIG. 11, twelve power distribution units will be described. Reference numeral 13 is a variable power distributor that distributes the power of the pseudo target signal to a plurality of systems, and 14 is a power distribution control unit that generates a control signal to the variable power distributor. The power distribution control unit generates 13 control signals based on the power distribution ratio information from the 23 antenna control units.

The fifteen phase shift units in FIG. 11 will be described. 16 is a phase shifter for rotating the phase of the pseudo target signal,
Reference numeral 17 is a phase control unit for generating a control signal to the phase shifter. The phase control unit generates 16 control signals based on the phase shift amount information from the 23 antenna control units.

18 according to FIG. 11, FIG. 13, and FIG.
The radiating section of will be described. 20 is a switch for feeding the pseudo target signal to the array antenna corresponding to the target position,
Reference numeral 21 is a switch control unit that generates a control signal for the switch, and 22 is an array antenna that radiates a pseudo target signal into space. Fig. 1 Configuration example of switch and array antenna
3 shows. The figure (a) is a system diagram of the switch, and the figure (b).
Is the allocation of element antennas. The elements of the array antenna for radiating the pseudo target signal are alternately arranged on the antenna substrate 22 for target 1 and target 2 as shown in (b), and two targets can be simultaneously radiated on the antenna surface. There are four systems of pseudo target signals distributed by the power distribution unit in one target, and “1-2” in the figure indicates the signal of the second system of target 1. The switch that feeds each element antenna is composed of four independent 1: n switches for each target. Here, since there are four elements in one board for one system, n = 4. By controlling the switches of these four systems, four element antennas surrounding the radiation point are always selected. FIG. 14 shows the operation when the target moves on the array antenna. The movement when the target radiation position is surrounded by the same element is performed by controlling the signal power ratio of each element. If the target movement spans a set of different elements, some elements (in this case # 1 and #
2) Switch the switch. Although FIG. 14 shows one goal, the second goal can be realized in exactly the same manner.

The antenna control unit 23 in FIG. 12 will be described. Reference numerals 24 and 27 denote a radiation position calculation unit that calculates the target position from the target angle and angular velocity, 25 an angle correction unit that corrects an installation error of the array antenna and a loss error of the feeding system with respect to the target position, and 26 an angle correction described above. An angle correction table for performing the above, 28 is a radiating element selection unit for finding the radiating element of the array antenna from the target position, 29
Is an inter-element position calculation unit that obtains the internal division ratio of the radiating points between the selected radiating elements, and 30 is an antenna gain correction unit that calculates the amount of power attenuation for compensating the array antenna gain from the internal division ratio between the elements. 31 is a power distribution ratio calculation unit that calculates the power distribution ratio from the internal division ratio between the elements, 32 is the corresponding switch for supplying power to the selected radiating element,
A switch selection unit for performing the branch control, 33 is a phase data selection unit for correcting a phase error due to a difference in electrical length between the power feeding systems, and 34 is a phase correction table for the phase correction. The input to the antenna control unit is the target angle and angular velocity, and the output is 10, 14, 17, 2 already described.
This is control information for 1.

[0009]

Since the radiating section of the conventional pseudo target signal generator is constructed as shown in FIG. 11, when it becomes necessary to increase the number of pseudo targets from two, the element antenna substrate is regenerated. Depending on the design, it was necessary to increase the number of elements per area to support multiple targets, or to take measures such as limiting the movement range of the target. In addition, when the number of blockings is increased, there is a problem in terms of implementation such that the power feeding system becomes too complicated corresponding to the target number. The present invention has been made in order to solve the above problems. By electrically changing the power feeding path without changing the configuration and arrangement of the array antenna of the radiating part, the target number and the angular resolution that can be radiated simultaneously can be improved. The purpose is to obtain a controllable pseudo target signal generator.

Since the power distributor of the conventional pseudo target signal generator is constructed as shown in FIG. 11, the pseudo target is always a point target, and a large target or a short range target whose apparent area cannot be ignored. , Furthermore, it was impossible to simulate the spread of clutter. The present invention has been made in order to solve the above-mentioned problem, and extends the apparent radiation area of a pseudo target signal from a point to a surface, and has a spread corresponding to a target area shape or beam width at a short distance. The purpose is to obtain a pseudo target signal generator that can simulate clutter.

Since the radio wave source of the conventional pseudo target signal generator is constructed as shown in FIG. 11, the received pulse width is always the same as the transmitted pulse, and the point target that fits in one range bin of the radar should be simulated. Only possible. That is, it was not possible to generate a pseudo target signal having a pulse width different from that of the transmission pulse on the time axis. The present invention has been made to solve the above problems, and an object thereof is to obtain a pseudo target signal generator capable of simulating a reflected wave from a target or a ground surface having a spread in the range direction.

Since the power attenuator of the conventional pseudo target signal generator is constructed as shown in FIG. 11, the scintillation of the radar cross section due to the shape of the target and its attitude change is simulated depending on the situation. I couldn't. The present invention has been made to solve the above problems,
It is an object of the present invention to obtain a pseudo target signal generator capable of simulating the fluctuation of the target radar cross-sectional area according to the target shape and its attitude change.

Since the antenna control section of the conventional pseudo target signal generator is constructed as shown in FIG. 12, the target radiation position is always at the center of gravity thereof, and the reflected wave is reflected by the glint noise generated at the time of short range target observation. It was not possible to simulate the phenomenon in which bright spots fluctuate. The present invention has been made to solve the above problems, and provides a pseudo target signal generator capable of simulating an angle error due to a target glint noise at a short distance according to a target distance, shape, size, and aspect angle. The purpose is to get.

[0014]

In the pseudo target signal generators according to the first and second embodiments of the present invention, the array antenna elements are allocated from the conventional system according to the target number in order to expand the pseudo target number. Change to a switchable method. The input system of the switch is increased from the conventional one input to the number of terminals according to the target number according to the target number, and a switch is provided to electrically switch the target number and the angular resolution.
In this case, it is not necessary to change the structure of the array antenna and the wiring of the feeding system between the switch and the array antenna, which has a large impact on the system configuration.

In the pseudo target signal generating apparatus according to the third embodiment of the present invention, the apparent distribution area of the pseudo target signal is changed from the point to the surface by changing the power distribution ratio in the power distribution unit sufficiently faster than the radar signal processing cycle. Take the method of expansion.

In the pseudo target signal generator according to the fourth embodiment of the present invention, the width of the modulation pulse obtained from the transmission pulse of the radar is extended in accordance with the range width of the target, thereby extending the width in the range direction of the pseudo target. Take the method of holding.

The pseudo target signal generator according to the fifth embodiment of the present invention has a dynamic characteristic such as the position and speed of the target.
A method of randomly varying the power attenuation amount is adopted according to the target size, shape, and aspect angle. Random fluctuation is obtained by performing a band of random noise and amplitude limiting processing.

A pseudo target signal generator according to a sixth embodiment of the present invention sets a fluctuation amount and a fluctuation cycle based on glint noise calculated from a target distance, and generates a temporal fluctuation of a bright spot position. Take

[0019]

In the pseudo target signal generators according to the first and second embodiments of the present invention, the switches and exchangers in the power feeding path are electrically controlled without changing the configuration and arrangement of the array antenna of the radiation section. , The number of targets that can be emitted simultaneously and the angular resolution can be changed. At this time, if the target number is doubled, the angular resolution is 1.4 times.

In the pseudo target signal generator according to the third embodiment of the present invention, the reflection position from the surface is generated on the receiving radar side by changing the radiation position of the pseudo target signal at high speed within the area of the reflecting surface. Can be simulated as.
This makes it possible to simulate a clutter having a spread corresponding to a target area shape or beam width at a short distance.

The pseudo target signal generator according to the fourth embodiment of the present invention can return a pulse having a wider width than that at the time of transmission to the receiving radar side by expanding the pulse width of the pseudo target signal. This makes it possible to simulate a reflected wave from a target or the ground surface that has a spread in the range direction.

The pseudo target signal generator according to the fifth embodiment of the present invention can give random fluctuations by modulation with noise in which the power of the pseudo target signal is band-limited. This makes it possible to simulate a change in the target radar cross-sectional area in accordance with the target shape and its attitude change.

The pseudo target signal generator according to the sixth embodiment of the present invention varies the radiation position of the pseudo target signal in a cycle longer than the radar signal processing cycle, thereby providing the radar side with a fluctuation in the target angle measurement value. You can This makes it possible to simulate an angular error due to the target glint noise at a short distance according to the target distance, shape, size, and aspect angle.

[0024]

【Example】

Example 1. As a first embodiment of the present invention, a method of expanding the pseudo target number of the pseudo target signal generator will be described with reference to FIGS. 1, 2 and 3. FIG. 1 is a block diagram of the entire pseudo target signal generator according to the present embodiment, and FIG.
FIG. 3 is a diagram for explaining the configuration of the array antenna, and FIG. 3 is a diagram showing the configuration of the radiator. In FIG. 1, 20 to 22 are the same as or equivalent to those in FIG. 11, and 18 is a switch for controlling the input system of the pseudo target signal to the switch. FIG. 2 shows allocation of pseudo target signals and element antennas when the target number is expanded from 2 to 4, which is compared with the case where the target number is 2 in FIG. In FIG. 2, the area of the four elements corresponding to one target is 2 in FIG.
As a result of doubling the allocation, half of the elements conventionally allocated to the target 1 are newly allocated to the target 3. Goal 2
The same applies to the above, and element antennas corresponding to a total of four targets can be arranged. At this time, the element spacing is 1.
Since it is quadrupled, the angular resolution also increases. Therefore, if it is not necessary to increase the target number, it is desirable to use the allocation of FIG. 13 where the target number = 2. Also,
The input system to the switch in FIG. 2 needs to be changed because 1-1 and 1-3 are inserted in the switch corresponding to the conventional 1-1 (target 1 system 1). Figure 3 shows the structure of the radiation part that meets these requirements.
By changing the input type and adding an input switching exchanger, it is possible to electrically switch between the two-target simulation and the four-target simulation. The usage pattern of the exchanger and the switch is as shown in FIG. 3, and these controls are performed by the switch controller 21.

Example 2. An example in which the first embodiment of the present invention is expanded will be described. FIG. 4 is a diagram showing a method of further increasing the target number. 4A shows allocation of element antennas in the case of the conventional two-target simulation, FIG. 4B shows allocation of the element antennas in the four-target simulation described in Embodiment 1, and FIG. In (c), the resolution is doubled as compared with the conventional one, while the target number is increased by 6. switch,
The configuration of the exchanger can be realized by the same method as that of the first embodiment, and can be further expanded in principle.

Example 3. As a third embodiment of the present invention, a pseudo target radiation area simulation method of a pseudo target signal generator will be described with reference to FIGS. FIG. 1 is a block diagram of the entire pseudo target signal generator in the present embodiment, FIG. 5 is a diagram showing the configuration of a power distribution unit, and FIG. 6 is a diagram for explaining the operation of the power distribution unit. In FIG. 1, among the 12 power distribution units, 13 and 14 are the same as or equivalent to those in FIG.
Reference numeral 51 is a power distribution ratio changing unit that sets a time-varying component of the power distribution ratio. In FIG. 5, among the power distribution ratio change units 51, 36 calculates the width of the radiation area from the target distance and size, sets the amplitude of AZ and EL, and 37 represents the radiation area from the target shape. Phase difference setting for setting the phase difference between the AZ and EL vibrations, 35 an oscillating portion for vibrating the power distribution ratio, 38 and 39 AZ and EL control for generating AZ and EL vibration components , 40 are phase shifters for controlling the phase of EL based on the set phase difference of 37. Three
The cycle of the vibration generated by 5 is made sufficiently smaller than the signal processing cycle of the radar that receives the pseudo target signal. FIG. 10 shows a radiation area when the power distribution ratio is oscillated by the above method, and (a) shows a case of conventional single point radiation.
(B) is the case where the distribution ratio is oscillated in the EL direction, and (c) is the case where the phase difference is zero or 180 ° in the AZ and EL directions. When the radiation region extends over a plurality of element regions, it may be considered that switching cannot be speedily performed. Therefore, the present embodiment is applied after the element spacing is widened according to the first and second embodiments.

Example 4. As a fourth embodiment of the present invention, a pseudo target range width expanding method of the pseudo target signal generator will be described with reference to FIGS. 1, 7, and 8. FIG. 1 is a configuration diagram of the entire pseudo target signal generator in this embodiment, FIG. 7 is a diagram showing a configuration of a radio wave source, and FIG. 8 is a diagram for explaining a range width extending method. In FIG. 1, of the one radio wave source, 2 to 5 and 7 are the same as or equivalent to those in FIG. 11, and 6 is a range width setting unit that controls the width of the modulation pulse according to the target range width. In FIG. 7, reference numeral 41 is a range width calculation unit that calculates the range width of the pseudo target signal from the target distance, size, or terrain information, and 42 is a pulse width extension unit that controls the width of the transmission pulse based on the range width calculated in 41. Is. The pulse width stretching unit sends the power attenuation amount corresponding to the stretching to the power attenuation control unit 10 in order to compensate the power change of the pseudo target signal due to the widening of the pulse width. FIG. 8 shows waveforms on the time axis of the modulated pulse and the pseudo target signal received by the radar. (A) is a normal point target, (b) is a target having a range depth, and (b) simulates a target that extends over a plurality of range bins as a result of extending the modulated pulse.

Example 5. As a fifth embodiment of the present invention, a pseudo target radar cross-sectional area variation method of the pseudo target signal generator will be described with reference to FIGS. FIG. 1 is a block diagram of the entire pseudo target signal generator in this embodiment, and FIG. 9 is a diagram showing the configuration of a power attenuator. In FIG. 1, among the 8 power attenuating units, 9 and 10 are the same as or equivalent to those in FIG. 11, and 11 is an amplitude scintillation generating unit that generates a random fluctuation of the power attenuation amount. In FIG. 9, among the 11 amplitude scintillation generating units, 43 is a scintillation timing setting unit for generating scintillation based on glint generation timing obtained from the antenna control unit 23, and 44.
Is a scintillation level band setting unit that sets the scintillation amplitude and noise bandwidth from the target size, shape and aspect angle, 45 is a setting parameter table including amplitude and band data corresponding to the target parameters, and 46 is scintillation. Is a power attenuation amount changing unit that generates a change component of the power attenuation amount corresponding to. Based on the target size, shape and aspect angle entered in 44,
The amplitude level and bandwidth are selected from 45. Random noise for scintillation generated at 46 is amplitude- and band-limited by the filter of the above parameters, and is sent to the power attenuation control unit of 10. Further, at this time, 43 controls the timing of scintillation generation according to the glint generation timing according to claim 5.

Example 6. As a sixth embodiment of the present invention, a pseudo target glint noise simulation method of the pseudo target signal generator will be described with reference to FIG. FIG. 10 is a diagram showing the configuration of the antenna control unit. In FIG. 10, 24
Reference numerals 34 to 34 are the same as or equivalent to those in FIG. 12, 47 is a glint noise generation unit that generates an angular error of a short-range target, and 48
Is a glint period setting unit that sets the noise fluctuation period from the target distance, 49 is an angle error calculation unit that calculates the noise amplitude component from the target distance, and 50 is the result of 48 and 49 and the target size, shape, and aspect ratio. It is a bright spot position calculation unit that calculates a change in bright spot position due to glint noise from a corner. The position variation of the bright spot due to glint noise is relatively slow on the order of seconds, and can be simulated by superimposing this variation on the radiation position calculation unit of the antenna control unit. Also, the timing of glint that occurred here is 1
It is sent to the power attenuation control unit No. 1 to match the change in the radar cross section.

[0030]

EFFECTS OF THE INVENTION In the pseudo target signal generators of the first and second embodiments, the number of targets that can be simultaneously radiated can be changed by electrically changing the power feeding path without changing the configuration and arrangement of the array antenna of the radiating section. And the angular resolution can be controlled. This is because it is possible to expand the number of targets more than 2 which was difficult in principle by the conventional device to 4, 8, ... And the target in the embodiment 3 can be easily changed. This is effective in expanding the radiation area of and the selection of the optimum resolution.

The pseudo target signal generator according to the third embodiment expands the apparent radiation area of the pseudo target signal from a point to a surface, and forms a clutter having a spread corresponding to the target area shape or beam width at a short distance. Can be simulated. This makes it possible to evaluate the influence of the area shape of the pseudo target signal on the radar angle measurement accuracy and the beam scanning and clutter suppression in the radar search mode.

The pseudo target signal generator according to the fourth embodiment can simulate a reflected wave from a target or the ground surface having a spread in the range direction. This makes it possible to generate a relatively large target such as a ship or a pseudo target signal that spreads over a plurality of range bins such as a reflected wave from the ground surface in the ground mode of radar.

The pseudo target signal generator according to the fifth embodiment can simulate the fluctuation of the target radar cross-sectional area according to the shape of the target and its attitude change. The fluctuation of the radar cross section is remarkable in a short-range target whose level is high, and it is possible to evaluate the influence on the tracking accuracy of the radar at this time.

The pseudo target signal generator according to the sixth embodiment can simulate an angular error due to a target glint noise at a short distance according to a target distance, shape, size and aspect angle. By matching the variation of the radar cross-section of the fifth embodiment, it is possible to generate a pseudo target signal that is even closer to the actual one.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a pseudo target signal generator according to first to sixth embodiments of the present invention.

FIG. 2 is a diagram for explaining a configuration of a radiation unit of the pseudo target signal generator according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining the configuration of a radiation unit of the pseudo target signal generator according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining an application example of a radiation unit of the pseudo target signal generator according to the second embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a power distribution unit of a pseudo target signal generator according to a third embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the radiation unit of the pseudo target signal generator according to the third embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a radio wave source of a pseudo target signal generator according to a fourth embodiment of the present invention.

FIG. 8 is a diagram for explaining the operation of the radiation unit of the pseudo target signal generator according to the fourth embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of a radio wave source of a pseudo target signal generator according to a fifth embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of a radio wave source of a pseudo target signal generator according to a sixth embodiment of the present invention.

FIG. 11 is a diagram showing a configuration of a conventional pseudo target signal generator.

FIG. 12 is a diagram showing a configuration of an antenna control unit of a conventional pseudo target signal generator.

FIG. 13 is a diagram for explaining a configuration of a radiator of a conventional pseudo target signal generator.

FIG. 14 is a diagram for explaining a configuration of a radiation unit of a conventional pseudo target signal generator.

[Explanation of symbols]

 1 Radio wave source 2 Doppler generator 3 Clutter generator 4 Pulse modulator 5 Pulse delay controller 6 Range width setting unit 7 Power amplifier 8 Power attenuator 9 Variable power attenuator 10 Power attenuation controller 11 Amplitude scintillation generator 12 Power distribution unit 13 Variable power distribution unit 14 Power distribution control unit 15 Phase shift unit 16 Phase shifter 17 Phase control unit 18 Radiating unit 19 Exchanger 20 Switch 21 Switch control unit 22 Array antenna 23 Antenna control unit 24 Radiation position calculating unit ( 1) 25 angle correction unit 26 angle correction table 27 radiation position calculation unit (2) 28 radiation element selection unit 29 inter-element position calculation unit 30 antenna gain correction unit 31 power distribution ratio calculation unit 32 switch selection unit 33 phase data selection unit 34 Phase correction table 35 Oscillator 36 Amplitude setting 37 Phase difference setting 8 AZ control 39 EL control 40 Phase shifter 41 Range width calculation unit 42 Pulse width stretching unit 43 Scintillation timing setting unit 44 Scintillation level band setting unit 45 Setting parameter table 46 Power attenuation amount changing unit 47 Glint noise generating unit 48 Glint cycle setting Part 49 Angle error calculation part 50 Bright spot position calculation part 51 Power distribution ratio change part

Claims (6)

[Claims] 1. A radio wave source that generates a reflected wave of a radio wave transmitted from a radar as a pseudo target signal, a power attenuator that controls the power of the pseudo target signal, and a plurality of power sources of the pseudo target signal that correspond to an array antenna. Power distribution unit that distributes to each system, a phase shift unit that controls the phase of the distributed pseudo target signal of each system, and the array that radiates the pseudo target signal of each system into space from an angle corresponding to a target position. A pseudo target signal generation device comprising a radiation section including an antenna and an antenna control section for controlling each of the above components. 2. The radiating unit is an array antenna for radiating a pseudo target signal into space, a switch for selecting an element of the array antenna corresponding to a target position and supplying the pseudo target signal thereto, and a pseudo target signal for the switch. 2. The pseudo target signal generator according to claim 1, wherein the pseudo target signal generator comprises an exchanger for inputting, and the number of pseudo targets capable of simultaneous radiation and the angular resolution can be controlled. 3. The power distribution unit, a variable power distributor that distributes the power of the pseudo target signal to a plurality of systems, a power distribution control unit that generates a control signal to the variable power distributor based on a power distribution ratio, and a power It consists of a power distribution ratio changing unit that sets the time-varying component of the distribution ratio.By controlling the power distribution ratio faster than the radar signal processing cycle, the apparent radiation area of the pseudo target signal is expanded from a point to a surface. The pseudo target signal generator according to claim 1, wherein a clutter having a spread corresponding to a target area shape or a beam width at a short distance can be simulated. 4. The radio wave source includes a Doppler generator that generates a signal having a Doppler frequency according to the relative speed of the ship and the target, and clutter that is a reflected wave from the ground or sea surface according to the speed and altitude of the ship. A clutter generator that generates a signal, a pulse modulator that generates a reception pulse according to the radar transmission pulse, a pulse delay control unit that adds a delay time according to the distance between itself and the target to the modulation pulse, the target It consists of a range width setting unit that controls the width of the modulation pulse according to the range width, and a power amplification unit that amplifies the power of the pseudo target signal, and controls the modulation pulse width according to the target distance, size, or terrain information. 3. The pseudo target signal generator according to claim 1, wherein the reflected wave from the target or the ground surface having a spread in the range direction is simulated by. 5. The power attenuator comprises a variable power attenuator for controlling the power of a pseudo target signal generated by a radio wave source, a power attenuation controller for generating a control signal for the variable attenuator, and an amplitude variation of the pseudo target signal. It consists of an amplitude scintillation generator to generate, and in addition to dynamic specifications such as target position and speed, it also generates random fluctuations of power attenuation from the target size, shape and aspect angle. The pseudo target signal generation device according to claim 1, wherein the variation of the radar cross section is simulated. 6. The antenna control unit includes a radiation position calculation unit that calculates a target position from the target angle and angular velocity, a glint noise generation unit that generates an angle error from the target distance, size, shape, and aspect angle, and a target position. Angle correction unit that corrects the installation error of the array antenna with respect to the position and the loss error of the feeding system, the radiating element selection unit that finds the radiating element of the array antenna from the target position, and find the internal ratio of the radiating points between the selected radiating elements Inter-element position calculation unit, antenna gain correction unit that calculates the amount of power attenuation for correcting the array antenna gain from the internal division ratio between the elements, power distribution ratio calculation unit that calculates the power distribution ratio from the internal division ratio between the elements , A switch selection unit that selects the corresponding switch to supply power to the selected radiating element and controls the branching of the switch, depending on the difference in electrical length between the power supply systems. It consists of a phase data selection unit to correct the phase error, and when calculating the radiation position, the target position,
The pseudo target signal generator according to claim 1, wherein the target glint noise at a short distance can be simulated by adding an angle error component calculated from the size, shape, and aspect angle.