JPH03255384A - Training apparatus for radar operation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

[Conventional technology]

FIG. 3 is a block diagram showing the operating principle of a conventional radar operation training device. In FIG. Movement specifications.

A target/interference wave specification generator (2) determines the intensity, etc. of the interference wave in the direction of arrival (2), which generates temporal and spatial modulation parameters based on the output data of the target/interference wave specification generator (1). (3) is an antenna operation simulation unit that simulates the antenna operation of a radar device; [4] is an exciter that generates a seed signal for generating a simulated signal; (5) is an exciter that generates a seed signal for generating a simulated signal; Separator il! that distributes the output signal of the exciter (4)! , (61 is a target signal modulation unit that simulates a target signal, (7) is a jamming signal modulation unit that simulates jamming waves of a radio wave jamming device, (8m) and (8b) is a radio wave propagation unit that simulates power attenuation due to radio wave propagation. Modulation section.

(9m) (9b) 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, α is a mixer that combines the target signal and the interference wave, (11) is a high-frequency signal A simulated receiver converts it into a video signal. (12) is an operation display section that displays the output signal of the simulated receiver (11) and performs control operations for the operation of the radar device.

Next, the operation will be explained. Target/interference wave specifications generation section (
In step 1), the relative positional relationship between the radar device, the target, and the radio wave jamming device is determined using computer software processing, etc. according to a predetermined scenario, and the radar lid transmission power, target effective reflection area, and jamming device are determined. Radio wave characteristic specifications such as wave intensity are determined and these data are sent to the modulation calculation control section (2). The modulation calculation control unit (2) calculates the relative distance between the radar device and the target and the radio wave jamming device, and transmits a synchronization signal equivalent to that of the simulated radar device to the target signal modulation unit (6) and the jamming signal modulation unit ( 7). The exciter (4) generates a seed signal for generating a simulated signal and sends it to the two-way splitter 1 (51).The splitter W (5) distributes the output signal of the exciter (4).

It is sent to the target signal modulator (6) and the interference signal modulator (7). In the target signal modulation section (6), the modulation calculation control section (2
) modulates the output signal of the duplexer (5) in synchronization with the timing signal output of the splitter (5), and simultaneously generates the target high frequency signal.

The target size is determined by the command from the modulation calculation control unit (2).

The power intensity is set based on the target effective reflection area depending on the body position and the like. The output target high frequency signal of the target signal modulation section (6) is input to the I-wave propagation modulation section (81), and is attenuated according to the amount of power attenuation according to the round-trip radio wave propagation calculated by the modulation calculation control section (2). Ru. The target high frequency signal is input to the secondary antenna pattern change 11% (9m).

The power intensity during transmission and reception determined by the shape of the antenna beam pattern is controlled according to the angular difference between the antenna beam angle output of the antenna operation simulating section (3) and the target direction calculated by the modulation calculation control section (2). The output target high frequency signal of the antenna pattern modulation section (9&) is input to the ξ frequency signal and combined with the interference wave. - side interference signals in the same way as for the target signal.

The interference signal modulation section (7) modulates the output signal of the demultiplexer 41+51 in synchronization with the timing signal output of the modulation calculation control section a), and modulates the output signal at a predetermined timing, amplitude and waveform according to the command from the modulation calculation control section (2). It is generated as an interfering high frequency signal.

The output interference high-frequency signal of the interference signal modulation section (7) is input to the radio wave propagation modulation section (8b), and the modulation calculation control section (2)
The signal is attenuated according to the amount of power attenuation corresponding to the one-way radio wave propagation calculated in , and is sent to the antenna pattern modulation section (9b). The antenna pattern modulation section (9b) performs modulation based on two antenna patterns, one on the radio wave jamming device transmitting side and one on the radar snowmaking receiving side, and the radio wave arrival direction. The output interference high frequency signal of the antenna pattern modulation section (9b) is the mixer QOI
, is combined with the target high frequency signal, and is input to the simulated receiver (11). 2 for the simulated receiver (11)
The synthesized high frequency signal is converted into a video signal and sent to the operation display section (12). The operation display section (12) displays the output video signal of the simulated receiver (111) in synchronization with the antenna beam angle of the antenna operation simulation section (3).

Therefore, by having the operator perform various operations while monitoring the displayed video signals, it becomes possible to train radar operations in an electronic warfare environment.

[Problem to be solved by the invention]

Conventional radar operation training equipment is configured as two or more, so ECCM (Electric Count
Although it is possible to perform some operation training regarding er Mei-sures), it is not possible to simulate a sidelobe canceller, and it does not have sufficient functionality as a training device. The sidelobe canceller is a simulation related to the antenna pattern. FIG. 4 is a block diagram showing details of the antenna pattern modulation section of a conventional radar operation training device. In FIG. , (96m) is the antenna pattern function generation fold. Further, FIG. 5 is a characteristic diagram showing an example of the shape of the antenna pattern function, and in FIG. 2, (13) is the antenna pattern function output. In addition, in the same figure, the horizontal axis represents the angle from the antenna beam center.
! Each axis represents the antenna gain. Therefore, in the conventional radar operation training device, the antenna pattern function is uniquely determined, the sidelobe gain cannot be changed, and the sidelobe canceller cannot be simulated.

[Means to solve the problem]

The radar operation training device according to the present invention is constructed by replacing the antenna pattern function generator of the antenna pattern modulation section of the conventional radar training device with a main lobe pattern function generation bud, a sidelobe pattern function generator, and a gain coefficient multiplier. be.

[For production]

The antenna pattern modulation section in this invention is as follows.

By separating and combining the output of the main lobe pattern function generator and the output of the side lobe pattern function generator, the side lobe suppression effect is simulated.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, (1) to (12) are the same as in Figure 3, and (9)
5m) is the same as Figure 4, (91m) (91b) is the main lobe pattern function generation ill that generates only the main lobe pattern of the antenna, (92m) (92b
l is a sidelobe pattern function generating crucian carp that generates only the sidelobe pattern of the antenna, (93m) (93
b) is a gain coefficient multiplication function that controls the amount of suppression of the sidelobe canceller according to the command of the operation display m (12); (9)
4a) (94bl is the addition to add the sidelobe pattern function to the mainlobe pattern function @, (95
b) is a modulation bar similar to (95m). Also, in Figure 2 (1), (13) is the same as in Figure 5, and in Figure 2 (b)
In FIG. 2(c), (14) is the output of the main lobe pattern function generator, and (15) in FIG. 2(c) is the output of the side lobe pattern function generator.

One embodiment of the present invention is constructed as imagined, so that if the operator does not select the operation of the sidelobe canceller on the operation display section (12), the gain coefficient multiplication@(93m) The coefficient of (93b) is α=1, and the sidelobe pattern 1gI number generated snow output is directly combined with the mainlobe pattern function generator output, resulting in the antenna pattern output as shown in (13) in Fig. 2(a). The operation in this state is exactly the same as the conventional radar operation training device.

If the operator selects to activate the sidelobe canceller in operation display m(12), the gain coefficient is multiplied! #(
Since the coefficients of (93m) and (93b) are a=0, the main lobe pattern function generator (91a) and (91b)
The antenna pattern output is as shown in (14) in FIG. 2(b). therefore.

The output high frequency signals of the radio wave propagation modulators (8a) and (8b) are as follows.

It is similar to the conventional radar operation training device, but since the antenna pattern modulators (9a) and (9b) receive modulation only by the main lobe pattern, even if there is a wave arriving from the side lobe pattern direction, the S pseudo high frequency output is not generated. The operation of a sidelobe canceller can be realized without being output as . Furthermore, by setting the value to an arbitrary value between 0<α and 1, it is possible to obtain the effect of partially suppressing the sidelobes. The outputs of the antenna pattern modulators (9a) and (9b) are combined by ξfsa[alpha] as in the case of conventional radar operation training equipment, and the outputs of the antenna pattern modulators (9a) and (9b) are combined by
11), it is converted into a video signal and displayed on the operation display section (12).

〔Effect of the invention〕

As shown above, according to the present invention, the conventional antenna pattern function generator can be used to generate a main lobe pattern function! By replacing # with the sidelobe pattern function generator and gain coefficient multiplication example C, the sidelobe canceller operation can be simulated.

This has the effect of providing the possibility of more realistic ECCM operation training in the training of radar operators 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, and FIG.
) is a characteristic diagram showing the pattern function characteristics for performing antenna pattern modulation, Figure 3 is a block diagram showing the operating principle of the conventional radar operation training device, and Figure 4 is the same (details of the antenna pattern modulation section). The block diagram shown in FIG. 5 is also a characteristic diagram showing the antenna pattern characteristics. In the figure, (1) is the target/interference wave specification generating section, (2)
is a modulation calculation control section, (3) is an antenna operation simulation section, and (4) is a modulation calculation control section.
) is the exciter, (5) is the branching filter, (61 is the target signal modulation section, (7) is the interference signal modulation section, (8m) (8b) is the radio wave propagation modulation section. (9m) (9b) is the antenna pattern The modulation section, α [is the mixer. (11) is the simulated receiver, (12) is the operation display section, (
13) is the antenna pattern, (14) is the main lobe pattern function output, and (15) is the side lobe pattern function output. (91m> (91b) is the main lobe pattern function generator. (92m) (92b) Sidelobe pattern function generator. (93a) (93b) is the gain coefficient multiplier, (94a
) (94b) is an adder, (95&) (95bl is a transformer I, and (96al is an antenna pattern function generator.) In the two figures, the same or corresponding parts are indicated by the same reference numerals.

Claims (1)

[Claims] In a device for radar operation training, a target/interference wave specification generation unit that generates a scenario with various specifications predetermined to simulate the radar device, target, and radio wave jamming device, and for generating a simulated signal. an exciter that generates a seed signal, a duplexer that distributes the exciter output signal, and a modulation operation that calculates temporal and spatial radio wave environment modulation specifications based on the output data of the target/interference wave specification generation section. a control section; a target signal modulation section that modulates the duplexer output signal in synchronization with the timing signal output of the modulation calculation control section to generate a target high frequency signal; and an interfering signal modulation section that also generates an interfering high frequency 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 high frequency signal and the interfering high frequency signal using the control signal of the modulation calculation control unit;
a plurality of antenna pattern modulation units that simulate the influence of an antenna pattern depending on a radio wave arrival direction; a plurality of mainlobe pattern function generators and sidelobe pattern function generators each forming the antenna pattern modulation unit;
A gain coefficient multiplier, an adder, and a modulator, a mixer that synthesizes a target high frequency signal and an interfering high frequency signal that simulates the influence of the above-mentioned intensity modulation and antenna pattern, and a simulated reception that converts the combined high frequency signal into a video signal. What is claimed is: 1. A radar operation training device comprising: a receiver; and an operation display unit that displays the simulated receiver output video signal and performs various radar operations.