JPH03220478A - Radar operation training apparatus - Google Patents

Abstract

PURPOSE:To simulate the depression effect of a side lobe by synthesizing the output of an antenna lobe pattern function generator and the output of a side lobe pattern function generator together. CONSTITUTION:When an operator does not select the operation of a side lobe canceler on a display 9, the coefficient alpha of gain coefficient multipliers 73a and 73b is equal to 0. When the operation of the side lobe canceler is selected, the coefficient alpha of the multipliers 73a and 73b is equal to 1, the output of antenna pattern function generators 71a and 71b and the output of side lobe pattern function generators 72a and 72b are combined together is subtracters 74a and 74b, respectively, and only a main lobe pattern is outputted. Therefore, only main lobe patterns in the output video signals of wave propagation modulators 6a and 6b are modulated by antenna lobe modulators 7a and 7b, respectively. Thus, an incoming wave from a side lobe direction, if any, does not constitute a simulated video signal and the operation of the side lobe canceler is simulated.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to the training of radar operators.

[Conventional technology]

Figure 3 is a block diagram showing the operating principle of a conventional radar operation training device. A target interference wave specification generation unit that determines the specifications, intensity, etc. of the interference waves in the two directions of arrival;
A modulation calculation control unit that generates temporal and spatial modulation specifications and timing based on the output data of the interference wave specification generation unit (11); (3) an antenna operation simulation unit that simulates the antenna operation of the radar device; 5) is a jamming signal generation unit that simulates interference waves of a radio wave jamming device, (6a) and (6b) are radio wave propagation modulation units that simulate power attenuation due to radio wave propagation, (7al
(7bl is an antenna pattern modulation unit that simulates the change in power intensity caused by the deviation between the antenna axis direction and the radio wave arrival direction, (8) is a mixer that combines the target signal and the interference wave, (
Reference numeral 9) is an operation display section that displays the output No. 2 of the mixer (8) and performs control operations for the operation of the radar device.

Next, the operation will be explained. Target/interference wave specifications generation section (
In 1), the relative positional relationship between the radar device, the target, and the radio wave jamming device is determined using software processing by a computer, etc. according to a predetermined scenario, and the radar device transmission power, target effective reflection area, jamming wave intensity, etc. Determine the radio wave characteristics specifications.

These data are sent to the modulation calculation control section (2).

The modulation calculation control section (2) calculates the relative distance between the radar device, the target, and the radio wave jamming device, and sends a synchronization signal equivalent to that of the radar device to be simulated to the target signal generation section and the interference signal generation section. The target signal generating section (4) generates the target signal as a video signal according to the above-mentioned timing signal, and at the same time, the modulation calculation control section (2) is instructed to generate the power intensity based on the effective reflection area corresponding to the target size, energization, etc. Video amplitude is set. The output target video signal of the target signal generator (4) is input to the radio wave propagation modulator (6a), and is attenuated according to the amount of power attenuation according to the round-trip radio wave propagation calculated by the modulation calculation controller (2). . The target video signal is then input to the antenna pattern modulator (7a), and the antenna operation simulator (3) is calculated by the modulation calculation controller (2).
The power intensity during transmission and reception, which is determined by the shape of the antenna beam pattern, is controlled according to the angular difference between the antenna beam angular output and the target direction. Antenna pattern modulation section (7
The output video signal of a) is input to the mixer (8) and combined with the interference wave. On the other hand, as in the case of the target signal, the interference signal generator (5) generates an interference wave video signal with a predetermined timing, amplitude, and waveform according to the commands of the modulation calculation control section (2). The signal is sent to the propagation modulator (6a). The radio wave propagation modulation section (6a) (well, the modulation calculation control section (
The antenna pattern modulator (7b) performs power attenuation according to the one-way radio wave propagation calculated in step 2) and transmits the interference video signal to the antenna pattern modulator (7b).
Send to. The antenna pattern modulation section (7b) performs modulation based on two antenna patterns, one on the transmission side of the radio wave jamming device and one on the reception side of the radar device, and the arrival direction of the radio wave. Interference wave video No. 43 of the antenna pattern modulation section (7b) is generated by the mixer (
8), is combined with the above target video signal, and is sent to the operation display section (9). The operation display section (9) displays the video (g) in synchronization with the antenna beam angle of the antenna a part (3).Therefore, the operator can perform various operations while monitoring the displayed video signal. By doing so, it becomes possible to train radar operations in an electronic warfare environment.

[Problem to be solved by the invention]

Since the conventional radar operation training device is configured as described above, E CCM (Electric Count
Although some operation training related to er Counter Measures can be performed, it is not possible to simulate a sidelobe canceller, so it does not have sufficient functionality as a training device.

The Douido Lobe Cassisera is a simulation related to the antenna pattern, but Fig. 4 is a block diagram showing the details of the antenna pattern modulation section of the conventional radar operation training device. The pattern function generator (75a) is a modulator that modulates the video amplitude by the antenna pattern function. Further, FIG. 5 is a characteristic diagram showing an example of the shape of the antenna pattern function, and 00) is the antenna pattern function output. In the figure, the horizontal axis represents the angle from the center of the antenna beam, and the vertical axis represents the antenna gain. Therefore, in conventional radar operation training devices, the antenna pattern function is uniquely determined.)
.

It is not possible to change the sidelobe gain and it is not possible to simulate a sidelobe canceller).

[Means to solve the problem]

The radar operation training device according to the present invention has a sidelobe pattern function generator for simulating a sidelobe canceller and a gain coefficient multiplication type added to the antenna pattern modulation section of the conventional radar operation training device.

[For production]

What is the antenna pattern modulation section in the invention of Party B?

The sidelobe suppression effect is simulated by combining the output of the antenna pattern function generation formula and the output of the sidelobe pattern function generator.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1st
In the figure (11 to F9+ are the same as in Figure 3, and (7)
a) , (75al is the same as in Fig. 4, (71bl is the antenna pattern function generator similar to (71a), (
72a) (72b) t is a sidelobe pattern function generator that generates only the sidelobe pattern of the antenna; (73a) (73b) is a gain coefficient that controls the amount of suppression of the sidelobe canceller according to commands from the operation display unit (9); Multiplier, (74al (74b) is a subtractor for subtracting the sidelobe pattern function from the antenna pattern function, (75b) is a modulator similar to (75a). Also, 00 in FIG. 2(a)) is the same as in Fig. 5. In Fig. 2(b), 01) is the sidelobe Pacushi function output, and in Fig. 2(e), (previously it is the gain coefficient multiplication M
(73a) Let the gain multiplier of (73b) be a-1.

This is the composite antenna pattern output when the sidelobe canceller is activated. Since one embodiment of the present invention is configured as described above, when the operator does not select the operation of the sidelobe canceller on the operation display section (9), the gain coefficient multiplier (73a) (73b) The coefficient of is a=O, and the output of the sidelobe pattern function generator (72a) (72b) passing through this becomes 0, and the operation in this state is exactly the same as the conventional radar operation training device. When the operation of the sidelobe canceller is selected on the display section (9), the gain coefficient multiplier (73a)
The coefficient of (73b) is α-1.

Antenna pattern function generator (71a) and (71b)
and sidelobe pattern function generation @5 (72a) and (
72b) are synthesized by the subtracters (74al and (74b)).The antenna pattern function output aO++ is a pattern of the entire antenna including the main lobe and sidelobes, and the sidelobe pattern function output song is a pattern of only sidelobes. Therefore, the result of subtracting both of them is only the main lobe as shown in the composite antenna pattern output port.Therefore, the radio wave propagation modulator (6a)
The output video signals of (6b) and (6b) are similar to those of the conventional radar operation training device, but the two-antenna pattern modulation unit (7a)
Since only the main lobe pattern is modulated in (7b), even if there is a wave arriving from the side lobe direction, it is not output as a simulated video output, making it possible to simulate the operation of the side lobe canceller. Antenna pattern modulation section (7
The outputs of a) and (7b) are combined in a mixer (8) as in the case of conventional radar operation training equipment and sent to the operation display section (9).
will be displayed.

〔Effect of the invention〕

As described above, according to the present invention, a sidelobe pattern function generator and a gain coefficient multiplier are added in addition to the antenna pattern function generator.

It is possible to simulate the sidelobe canceller operation, and it is effective in providing the possibility of more realistic ECCMCC side training in radar operator training in an electronic warfare environment.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the operating principle of a radar operation training device according to an embodiment of the present invention, FIG. 2 is a characteristic diagram showing pattern function characteristics for performing antenna pattern modulation, and FIG. Figure 4 is a block diagram showing the operating principle of the operation training device, and Figure 5 is a block diagram showing the details of the antenna pattern modulation section. Figure 5 is a characteristic diagram showing the antenna pattern characteristics.・Interference wave specifications generation part, (2
) is a modulation calculation control section, (3) is an antenna operation simulation section, (
4) is a target signal generation section, (5) is an interference signal generation section, and (8) is a target signal generation section.
) is the mixer, [9] is the operation display, (1) is the output of the antenna pattern function generator, (1) is the output of the sidelobe pattern function generator, (2) is the output of the composite antenna pattern,
(6a) (6b) are radio wave propagation modulation sections, (7a) (7
b) is antenna pattern change part 16, (7] aH71
b) is an antenna pattern generator, (72a) (72
b) is a sidelobe pattern generator. (73a) (73b) is a gain coefficient multiplier, (74a
) (74b) is a subtracter, and (75a) (75bl is a modulator.) In the two figures, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

[Claims] A target/interference wave specification generator generates various specifications based on a scenario in which various specifications are predetermined to simulate radar equipment, targets, and radio wave jamming devices, and time is calculated based on the output data of the target/interference wave specification generator. a modulation calculation control unit that calculates target and spatial radio wave environment modulation specifications; a target signal generation unit that generates a target video signal in synchronization with the timing signal output of the modulation calculation control unit; and a target signal generation unit that also generates an interference video signal. an antenna operation simulator that generates an antenna angle signal of the radar device; and a plurality of radio wave propagation modulators that modulate the intensity of the target video signal and the interference video signal using the control signal of the modulation calculation control unit. a plurality of antenna pattern modulation sections that simulate the influence of the antenna pattern depending on the radio wave arrival direction; and a plurality of antenna pattern function generators each forming the antenna pattern modulation section;
a sidelobe pattern function generator, a gain factor multiplier, a subtracter and a modulator, a mixer for synthesizing a target video signal and an interference video signal simulating the influence of the intensity modulation and antenna pattern, and a mixer for synthesizing the synthesized video signal. A radar operation training device characterized by having an operation display unit that displays information and performs various radar operations.