JP2002286831A - Signal-repeating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a signal-repeating apparatus for increasing interference effect to a target radar by increasing the fidelity of the interference wave of speed deception being transmitted to a radar wave to be received. SOLUTION: The signal-repeating apparatus comprises a delay line bank 21 for delaying the waveform of an intermediate frequency signal that is converted by a frequency conversion section 2 using a delay line that is selected from delay lines 19a-19n, and a signal processor 22 for controlling the delay line bank 21 to select a delay line having delay time that is approximated to the pulse width of the intermediate frequency signal that is converted by the frequency conversion section 2 when the interference wave of speed deception is transmitted from a transmission section 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a received radar wave to perform distance deception (Ran) on a partner radar.
The present invention relates to a signal repeater for transmitting an interference wave of "ge Gate Pull Off" or "velocity gate pull off".

[0002]

2. Description of the Related Art FIG. 9 is a block diagram showing a conventional signal repeater. In the figure, reference numeral 1 denotes a receiving section, and in the receiving section 1, 2 denotes a frequency conversion section (down converter);
3 is a local oscillator, 4 is a frequency analyzer, 5 is a coupler, and 6 is a detector. Reference numeral 7 denotes an interference unit. In the interference unit 7, 8 is a signal distributor, 9 is a noise signal generator, and 10 is a DR.
FM (digital waveform memory), 11 is a fixed delay line, 12
Is a switch, 13 is a signal synthesizer, 14 is a frequency converter
(Up converter), 15 is a local oscillator, and 16 is a phase shifter. Reference numeral 17 denotes a transmission unit, and reference numeral 18 denotes a signal processor.

Next, the operation will be described. A radar wave from the other party's radar is input to the receiving unit 1. Inside the receiving section 1, the frequency converting section 2 converts the received signal into an intermediate frequency signal using the frequency signal from the local oscillator 3. In response to the input of the intermediate frequency signal, the frequency analyzer 4 determines whether or not a radar wave has been received from the other radar. The intermediate frequency signal is detected by the coupler 5 and the detector 6, and the detected output is supplied to the signal processor 18. Further, inside the interference unit 7, the input intermediate frequency signal is converted into a DRF signal by the signal distributor 8.
The signal is distributed to the M10 side and the fixed delay line 11 side. DRFM1
At 0, the waveform of the input intermediate frequency signal is temporarily stored, and the stored waveform of the intermediate frequency signal is output with a delay time corresponding to the setting of the signal processor 18. Further, the fixed delay line 11 delays the waveform of the input intermediate frequency signal by a fixed delay time T0 and outputs the delayed signal. Switch 12
Is selected and controlled by the signal processor 18, and selects the DRFM 10 side when performing distance deception, and selects the fixed delay line 11 side when performing speed deception. Noise signal generator 9
Then, a noise signal is generated, and the noise signal is combined with the waveform of the intermediate frequency signal by the signal combiner 13 and output.
The frequency converter 14 uses a frequency signal obtained by adjusting the phase of the frequency signal from the local oscillator 15 by the phase shifter 16, and outputs a high-frequency signal corresponding to the received radar wave as an intermediate frequency signal as a signal source. Convert to Transmission unit 17
Then, the converted high frequency signal is transmitted as an interference wave.

In such a signal repeater, the signal processor 18 controls the entire device, detects a pulse characteristic from the detection output of the intermediate frequency signal by the coupler 5 and the detector 6, and detects the pulse characteristic. In response to the detection of the distance fraud or the speed fraud is implemented. When transmitting the interference wave of the distance deception, the waveform of the intermediate frequency signal is stored by the DRFM 10, and the waveform of the stored intermediate frequency signal is output with a time delay from the actual echo wave. 12, a noise signal is synthesized by a signal synthesizer 13, and the intermediate frequency signal synthesized by delaying and synthesizing the noise signal by a frequency conversion unit 14 is converted into a high frequency signal of a radar wave received as a signal source and transmitted. By transmitting as an interference wave by the unit 17, the radar of the other party is erroneously recognized as being farther than the actual one. When transmitting an interference wave of speed deception, the fixed delay line 11 delays the waveform of the intermediate frequency signal by a fixed delay time T0 and outputs it.
2, the signal synthesizer 13 synthesizes the noise signal, and converts the intermediate frequency signal, which has been delayed and synthesized by the frequency converter 14 to the noise signal, into a high frequency signal of the received radar wave, using the signal source as a signal source. Further, by changing the adjustment of the phase shifter 16, the frequency of the high-frequency signal is changed, and transmitted as an interference wave by the transmission unit 17, so that the other radar has its own pseudo Doppler component. Erroneously recognizes the speed tracking of the other radar.

[0005] As described above, when an interfering wave of range deception or speed deception is transmitted, it is necessary to receive the radar wave of the other radar in order to generate an interfering wave for the other radar. Also, when installed on an aircraft, etc., the received radar wave and the transmitted interfering wave are combined in space, so while transmitting the interfering wave so as not to receive the interfering wave emitted by the own aircraft, A look-through process of not receiving a wave is performed. Therefore, when transmitting an interfering wave of speed deception, it is prevented that the interfering wave cannot be transmitted when the radar wave is received, although the interfering wave is generated based on the received radar wave. Therefore, by using a fixed delay line 11 for delaying an intermediate frequency signal based on a received radar wave in a signal path and delaying a time from when a radar wave is received to when an interference wave is output, an interference signal is generated. ing.

[0006]

Since the conventional signal repeater is configured as described above, when transmitting an interference wave of speed deception, an intermediate frequency signal based on a received radar wave is delayed. The fixed delay line 11 is used in the signal path to delay the time from when the radar wave is received to when the interference wave is output, thereby generating an interference signal. FIG. 10 is a timing chart showing the problem of the conventional signal repeater, where Tin is the pulse width of the intermediate frequency signal based on the received radar wave, and T0 is the delay time of the fixed delay line 11. As described above, after the intermediate frequency signal based on the received radar wave is delayed by the delay time T0 of the fixed delay line 11, the look-through processing is performed, the reception of the radar wave is stopped, and the intermediate frequency signal of the delay time T0 is output. , An interference wave must be generated and transmitted, and the pulse length of the interference wave can be transmitted only for the delay time T0 of the fixed delay line 11, and the transmission for the received radar wave There is a problem that the signal fidelity of the interfering wave to be lowered is low and the interfering effect is low.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to increase the fidelity of a transmitted speed deception interfering wave with respect to a received radar wave, and to enhance the interfering effect on a partner radar. The purpose is to obtain a repeat device.

[0008]

A signal repeater according to the present invention comprises a delay means for delaying a waveform of an intermediate frequency signal converted by a first frequency conversion means by a selected delay line, and a speed control by a transmission means. Control means for controlling the delay means such that a delay line having a delay time approximate to the pulse width of the intermediate frequency signal converted by the first frequency conversion means is selected when transmitting a deceptive interference wave; It is provided with.

A signal repeater according to the present invention has a first
A second waveform storage means for storing a waveform of the intermediate frequency signal converted by the frequency conversion means, and an intermediate frequency signal stored in the second waveform storage means when transmitting a disturbance wave of speed deception by the transmission means. And control means for setting the delay time of input / output of the waveform of the frequency signal so as to approximate the pulse width of the intermediate frequency signal converted by the first frequency conversion means.

The signal repeater according to the present invention has a first
Waveform storing means for storing the waveform of the intermediate frequency signal converted by the frequency converting means, and inputting the waveform of the intermediate frequency signal stored in the waveform storing means when transmitting the interfering wave of distance deception by the transmitting means. When an output delay time is set, an interference wave of distance deception according to the delay time is transmitted, and an interference wave of speed deception is transmitted by the transmission means, the waveform of the intermediate frequency signal stored in the waveform storage means And control means for setting the input / output delay time to approximate the pulse width of the intermediate frequency signal converted by the first frequency conversion means.

[0011] The signal repeater according to the present invention includes speed detecting means for detecting the speed of its own device, and the control means, when the transmitting means transmits an interference wave of speed deception,
The frequency of the high-frequency signal generated by the second frequency converter is changed so as to gradually deviate from the speed detected by the speed detector.

[0012] A signal repeater according to the present invention includes information storage means for storing output power information of a partner radar according to pulse characteristics of an intermediate frequency signal, and the control means is converted by the first frequency conversion means. The output power information of the other radar corresponding to the pulse characteristic of the intermediate frequency signal is extracted from the information storage means, and the other power is extracted according to the output power information and the amplitude level of the intermediate frequency signal converted by the first frequency conversion means. By estimating the distance between the radar and the own aircraft, the power of the interfering wave transmitted from the transmitting means is adjusted so that the echo wave returning to the other radar and the interfering wave returning to the other radar have approximately the same power according to the distance. Is controlled.

[0013] In the signal repeater according to the present invention, in the control means, the interference transmitted from the transmitting means is controlled so that the power becomes about the same as the echo wave returning to the other radar according to the distance between the other radar and the own aircraft. The power of the wave is controlled, and the power of the interfering wave transmitted from the transmitting means is controlled so as to gradually shift from the power change of the echo wave returning to the other radar in accordance with the change in the distance between the other radar and the own aircraft. It was made.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a signal repeater according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a reception unit for receiving a radar wave from a partner radar, and in the reception unit 1, 2 denotes a reception signal. Frequency conversion unit (down converter: first frequency conversion means) for converting the signal to an intermediate frequency signal, 3 is a local oscillator for generating a frequency signal,
Reference numeral 4 denotes a frequency analyzer for analyzing the frequency of the radar wave from the intermediate frequency signal, reference numeral 5 denotes a coupler, and reference numeral 6 denotes a detector for detecting the intermediate frequency signal and supplying the detected signal to the signal processor 22. Reference numeral 7 denotes a disturbance unit for generating a high-frequency signal such as distance deception or velocity deception according to a radar wave from the other radar. In the disturbance unit 7, reference numeral 8 denotes a signal distributor that distributes an intermediate frequency signal, and reference numeral 9 denotes noise. A noise signal generator for generating a signal; and a DRFM for storing a waveform of the intermediate frequency signal.
(Digital waveform memory: waveform storage means), 21 is a plurality of delay lines 19a, 19b,.
, 19n, and selectors 20a and 20b for selecting any one of the delay lines 19a to 19n.
A delay line bank (delay means) 12 for delaying the waveform of the intermediate frequency signal by the selected delay line is a DRFM 10
A switch (selecting means) for selecting and outputting the waveform of the intermediate frequency signal output from one of the side of the delay line bank 21 and the signal line synthesizer for synthesizing the noise signal to the waveform of the intermediate frequency signal, and 14 A frequency converter (up-converter: second frequency converter) for generating a high-frequency signal near the frequency of the received radar wave based on the waveform of the received intermediate-frequency signal; By making the phase of the oscillator 16 variable,
This is a phase shifter that makes the frequency of the high-frequency signal generated by the frequency conversion unit 14 variable. A transmitting unit (transmitting means) 17 transmits the high-frequency signal generated by the interference unit 7 as an interference wave, and a switch 22 selects the output of the DRFM 10 by the switch 12 when transmitting the interference wave of the deception. At the same time, when the input / output delay time of the waveform of the intermediate frequency signal stored in the DRFM 10 is set, an interference wave of distance deception is transmitted according to the delay time, and an interference wave of speed deception is transmitted. The output of the delay line bank 21 is selected by the switch 12, and pulse characteristics such as pulse timing, pulse width, and pulse repetition frequency are detected from the detection signal of the intermediate frequency signal supplied through the coupler 5 and the detector 6. Delay line bank 2 so that a delay line having a delay time approximate to the pulse width is selected.
1 is controlled by the selection units 20a and 20b.
Processor (control means) for transmitting an interference wave of speed deception according to a change in the frequency of a high-frequency signal generated by the apparatus
It is.

Next, the operation will be described. A radar wave from the other party's radar is input to the receiving unit 1. Inside the receiver 1, the frequency converter 2 converts the received signal into an intermediate frequency signal using the frequency signal from the local oscillator 3. In response to the input of the intermediate frequency signal, the frequency analyzer 4 determines whether or not a radar wave has been received from the other radar. Further, the intermediate frequency signal is detected by the coupler 5 and the detector 6, and the detection output is supplied to the signal processor 22. Further, inside the interference unit 7, the input intermediate frequency signal is converted into a DRF signal by the signal distributor 8.
The signal is distributed to the M10 side and the delay line bank 21 side. DRFM
In 10, the waveform of the input intermediate frequency signal is temporarily stored, and the stored waveform of the intermediate frequency signal is output with a delay time according to the setting of the signal processor 22. In the delay line bank 21, the selection unit 2 is controlled according to the control of the signal processor 22.
0a and 20b select one of the delay lines, delay the input intermediate frequency signal waveform by the delay time of the selected delay line, and output it. The switch 12 is selectively controlled by the signal processor 22, and when performing distance deception, D
When the RFM 10 is selected and speed deception is performed, the delay line bank 21 is selected. The noise signal generator 9 generates a noise signal, and the signal synthesizer 13 combines the noise signal with the waveform of the intermediate frequency signal and outputs the resultant signal. Further, the frequency conversion unit 14 uses the frequency signal whose phase has been adjusted by the phase shifter 16 for the frequency signal from the local oscillator 15,
An intermediate frequency signal as a signal source is converted into a high frequency signal corresponding to the received radar wave. The transmitting unit 17 transmits the converted high frequency signal as an interference wave.

In such a signal repeater, the signal processor 22 controls the entire apparatus, and detects a pulse timing, a pulse width, a pulse repetition frequency from the detection output of the intermediate frequency signal by the coupler 5 and the detector 6. And the like, and, depending on the detection of the pulse characteristics, an obstacle to distance deception or speed deception is implemented. When transmitting the interference wave of the distance deception, the waveform of the intermediate frequency signal is stored by the DRFM 10, and the waveform of the stored intermediate frequency signal is output with a time delay from the actual echo wave. 12, a noise signal is synthesized by a signal synthesizer 13, and the intermediate frequency signal synthesized by delaying and synthesizing the noise signal by a frequency conversion unit 14 is converted into a high frequency signal of a radar wave received as a signal source and transmitted. By transmitting as an interference wave by the unit 17, the radar of the other party is erroneously recognized as being farther than the actual one. When transmitting an interference wave of speed deception, the selectors 20a and 20b of the delay line bank 21 are selected so that a delay line having a delay time approximate to the pulse width among the detected pulse characteristics is selected. Control, delays the waveform of the intermediate frequency signal by a delay time corresponding to the selected delay line, and outputs the delayed signal. The switch 12 synthesizes a noise signal by the signal synthesizer 13, and the frequency converter 14 delays the noise signal. The intermediate frequency signal obtained by synthesizing the noise signal is converted into a high frequency signal of the received radar wave using the signal source as a signal source, and further, the frequency of the high frequency signal is changed by changing the adjustment of the phase shifter 16. And the transmitting unit 17
By transmitting the signal as an interference wave, the target radar has its own pseudo Doppler component and erroneously recognizes the speed tracking of the target radar.

As described above, when transmitting an interference wave of range deception or speed deception, it is necessary to receive a radar wave of the other radar in order to generate an interference wave for the other radar. Also, when installed on an aircraft, etc., the received radar wave and the transmitted interfering wave are combined in space, so while transmitting the interfering wave so as not to receive the interfering wave emitted by the own aircraft, A look-through process of not receiving a wave is performed. Therefore, when transmitting an interfering wave of speed deception, it is prevented that the interfering wave cannot be transmitted when the radar wave is received, although the interfering wave is generated based on the received radar wave. Therefore, a delay line bank 21 for delaying an intermediate frequency signal based on a received radar wave is used in a signal path, and a time from when a radar wave is received to when an interference wave is output is delayed to generate an interference signal. ing. FIG. 2 is a timing chart showing the effect of the signal repeater according to the first embodiment of the present invention, where Tin is the pulse width of the intermediate frequency signal based on the received radar wave, and T0 is the signal repeater in the conventional signal repeater. The delay time T1 of the fixed delay line 11 is the delay time of the delay line bank 21 in the signal repeater according to the first embodiment. In the conventional signal repeater, a look-through process is performed after delaying the intermediate frequency signal based on the received radar wave by the delay time T0 of the fixed delay line 11, and the reception of the radar wave is stopped. An interference wave must be generated and transmitted based on the intermediate frequency signal. The pulse length of the interference wave can be transmitted only for the delay time T0 of the fixed delay line 11, and the pulse width of the received radar wave When Tin is longer than the delay time T0 of the fixed delay line 11, the signal fidelity of the transmitted interfering wave with respect to the received radar wave decreases, and the interfering effect decreases. On the contrary,
In the signal repeater according to the first embodiment, the intermediate frequency signal based on the received radar wave is delayed by a delay time T1 of a delay line having a delay time approximating the pulse width of the intermediate frequency signal, and then the look-up is performed. Through-processing is performed to stop the reception of the radar wave, and an interference wave is generated and transmitted based on the intermediate frequency signal of the delay time T1. Therefore, the pulse length of the interference wave is determined by the pulse width Tin of the received radar wave.
Can be transmitted for the delay time T1 of the delay line similar to the above, and the signal fidelity of the transmitted interference wave with respect to the received radar wave can be increased. Also, the target radar is replaced with the pulse width T of the received radar wave.
Even if in is different, a delay line having a delay time approximating the pulse width is applied to the delay line bank 21.
And the signal fidelity can be increased.

As described above, according to the first embodiment, when the transmitting unit 17 transmits an interference wave of speed deception, a so-called look-through process that does not receive a radar wave while transmitting the interference wave is performed. Even in the case where the frequency conversion is performed by delaying the waveform of the intermediate frequency signal by a delay time approximating the pulse width of the intermediate frequency signal based on the radar wave received by the delay line bank 21, Can generate a high-frequency signal based on all the waveforms of the intermediate frequency signal, increase the fidelity of the speed deception interference wave transmitted by the transmission unit 17 with respect to the received radar wave, and send the signal to the threat radar. Can increase the interference effect.

Embodiment 2 FIG. 3 is a block diagram showing a signal repeater according to a second embodiment of the present invention. In the figure, reference numeral 10a denotes a DR for storing a waveform of an intermediate frequency signal.
FM (digital waveform memory: first waveform storage means), 1
Reference numeral 0b denotes a DRFM (digital waveform memory: second waveform storage unit) that stores the waveform of the intermediate frequency signal. Also,
23 allows the switch 12 to select the output of the DRFM 10b when transmitting an interference wave of speed deception,
A signal for setting the input / output delay time of the waveform of the intermediate frequency signal stored in the DRFM 10b so as to approximate the pulse width detected from the detection signal of the intermediate frequency signal supplied through the coupler 5 and the detector 6. Controller (control means)
It is. Other configurations are the same as those in FIG.

Next, the operation will be described. In the second embodiment, a DRFM 10b is used in place of the delay line bank 21 shown in the first embodiment. Inside the interference unit 7, the input intermediate frequency signal is distributed by the signal distributor 8 to the DRFM 10a side and the DRFM 10b side. The DRFM 10a temporarily stores the waveform of the input intermediate frequency signal, and outputs the stored waveform of the intermediate frequency signal with a delay time according to the setting of the signal processor 23.
Further, the DRFM 10b temporarily stores the waveform of the input intermediate frequency signal, and outputs the stored waveform of the intermediate frequency signal with a delay time approximate to the pulse width detected by the signal processor 23. Other operations are the same as those in the first embodiment.

As described above, according to the second embodiment, when transmitting the interfering wave of the speed deception by the transmitting unit 17, the so-called look-through processing in which the radar wave is not received during the transmitting of the interfering wave is performed. Even if you do, DRF
By delaying the waveform of the intermediate frequency signal by a delay time approximating the pulse width of the intermediate frequency signal based on the radar wave received by M10b, the frequency converter 14 allows all the waveforms of the intermediate frequency signal , A high-frequency signal can be generated, and the fidelity of the speed deception interference wave transmitted by the transmission unit 17 with respect to the received radar wave can be increased, and the interference effect on the threat radar can be enhanced. Further, compared to the delay line bank 21 for selecting any one of the plurality of delay lines 19a to 19n, D
In the RFM 10b, a fine delay time can be set.

Embodiment 3 FIG. FIG. 4 is a block diagram showing a signal repeater according to Embodiment 3 of the present invention. In the figure, reference numeral 10c denotes a DR for storing a waveform of an intermediate frequency signal.
FM (digital waveform memory: waveform storage means). In addition, if 24 is to transmit the interfering wave of distance deception, D
When the input / output delay time of the waveform of the intermediate frequency signal stored in the RFM 10c is set, and the interference wave of the distance deception is transmitted according to the delay time, and the interference wave of the speed deception is transmitted, it is stored in the DRFM 10c. A signal controller (controller) that sets the input / output delay time of the waveform of the intermediate frequency signal to be approximated to the pulse width detected from the detection signal of the intermediate frequency signal supplied through the coupler 5 and the detector 6. Means). Other configurations are the same as those in FIG.

Next, the operation will be described. In the third embodiment, the DRFM 10a and the DRFM 10b shown in the second embodiment are shared by one DRFM 10c. In the interference unit 7, the signal distributor 8 is not used, and the DRFM 10c temporarily stores the waveform of the input intermediate frequency signal and sets the signal processor 24 when transmitting an interference wave of distance deception. And outputs the stored waveform of the intermediate frequency signal with a delay time corresponding to. Also,
When transmitting an interference wave of speed deception, the signal processor 2
4 outputs the stored waveform of the intermediate frequency signal with a delay time approximate to the pulse width detected. Other operations are the same as those in the first embodiment.

As described above, according to the third embodiment, when the transmitting unit 17 transmits an interference wave of speed deception, a so-called look-through process that does not receive a radar wave while transmitting the interference wave is performed. Even if you do, DRF
By delaying the waveform of the intermediate frequency signal by a delay time approximating the pulse width of the intermediate frequency signal based on the radar wave received by M10c, the frequency conversion unit 14 allows all the waveforms of the intermediate frequency signal , A high-frequency signal can be generated, and the fidelity of the speed deception interference wave transmitted by the transmission unit 17 with respect to the received radar wave can be increased, and the interference effect on the threat radar can be enhanced. Further, compared to the delay line bank 21 for selecting any one of the plurality of delay lines 19a to 19n, D
In the RFM 10b, a fine delay time can be set. Further, the DRFM 10c is provided as a single unit for the common use of the distance deception and the speed deception, and the signal distributor 8 and the switch 12 are not required. Therefore, the configuration can be simplified and the price can be reduced.

Embodiment 4 FIG. 5 is a block diagram showing a signal repeater according to a fourth embodiment of the present invention. In the figure, reference numeral 25 denotes a speedometer (speed detection means) for detecting the speed of the own device, and 26 transmits an interference wave of speed deception. If you want to
A signal controller (control means) that controls the phase shifter 16 and changes the frequency of the high-frequency signal generated by the frequency conversion unit 14 so as to gradually deviate from the speed detected by the speedometer 25. Other configurations are the same as those in FIG.

Next, the operation will be described. The fourth embodiment is applied to a case where a signal repeater is mounted on a mobile device such as an aircraft. Since the signal repeater is often activated after receiving the radar wave of the other radar, the interfering wave is often behind, and the interfering wave extremely deviates from the range gate and speed gate of the other radar. Is transmitted to the other party's radar. Therefore, the speed shifter 16 controls the phase shifter 16 so that the speed of the own aircraft is detected by the speedometer 25 and when the interference wave of the speed deception is transmitted to the other radar, the speed is gradually shifted from the own aircraft speed. By changing the frequency of the high-frequency signal generated by the frequency converter 14 and removing the speed gate of the other radar, the other radar recognizes a faithful interference wave that is closer to the actual movement, and Orientation can be difficult. FIG.
FIG. 9 is an explanatory diagram showing an effect of the signal repeater according to the fourth embodiment of the present invention, which simulates a relationship between a speed gate of a partner radar and tracking. FIG. 6A shows a case where the other radar performs initial detection and no interference wave is generated.
FIG. 6 (b) shows a case where a speed deception interference wave is transmitted irrespective of the speed of the own device, and FIG. 6 (c) shows a case where the speed deception interference wave is transmitted taking into account the speed component of the own device. . FIG.
As shown in FIG. 6B, it is considered that even if the interference wave of the speed deception is transmitted at a place far from the actual speed of the own aircraft as shown in FIG. To
By starting transmission of an interference wave of speed deception from within the speed gate range of the other radar, the interference effect increases.

As described above, according to the fourth embodiment, by gradually shifting the speed deception interference wave from its own speed, a faithful interference wave closer to the actual movement can be transmitted to the other radar. By recognizing and gradually removing the radar from the speed gate of the other radar, it is possible to make the position evaluation of the own aircraft more difficult. In the fourth embodiment, an example in which the present invention is applied to the configuration of the third embodiment has been described. However, similar effects can be obtained by applying the fourth embodiment to the configurations of the first and second embodiments. .

Embodiment 5 FIG. 7 is a block diagram showing a signal repeater according to a fifth embodiment of the present invention. In FIG. 7, reference numeral 27 denotes a memory (information storage means) in which output power information of a partner radar according to pulse characteristics of an intermediate frequency signal is stored. ) And 28 extract from the memory 27 the output power information of the other radar corresponding to the pulse characteristic detected from the detection signal of the intermediate frequency signal supplied through the coupler 5 and the detector 6, and output the output power information and the intermediate The distance between the opponent radar and the own aircraft is estimated according to the amplitude level detected from the detection signal of the frequency signal, and the echo wave returning to the opponent radar and the interfering wave returning to the opponent radar are substantially equal according to the distance. It is a signal controller (control means) that controls the power of the interfering wave transmitted from the transmission unit 17 so that the power becomes power. Other configurations are the same as those in FIG.

Next, the operation will be described. In the fifth embodiment, the signal processor 28 detects a pulse characteristic from a detection signal of the intermediate frequency signal supplied through the coupler 5 and the detector 6, and outputs the output of the partner radar according to the detected pulse characteristic. The power information is extracted from the memory 27.
Then, in the signal processor 28, the coupler 5, the detector 6
The amplitude level is detected from the detection signal of the intermediate frequency signal supplied through, and the extracted output power information and the distance between the opponent radar and the own aircraft are estimated based on the detected amplitude level, and the distance is calculated. The power of the distance deception or speed deception interference wave transmitted from the transmission unit 17 is controlled such that the echo wave returning to the other party radar and the interference wave returning to the other party radar have the same level of power in response to the above.

As described above, according to the fifth embodiment, since the other party's radar receives a distance deception or a speed deception interference wave with power close to the echo wave, the echo wave and the interference wave are not transmitted to each other. Cannot be identified, making it difficult to evaluate the position of the own device. Note that, in the fifth embodiment, an example in which the present invention is applied to the configuration of the fourth embodiment has been described. However, similar effects can be obtained by applying the present embodiment to the configurations of the first to third embodiments. .

Embodiment 6 FIG. According to the sixth embodiment of the present invention, the power level of the interfering wave transmitted from transmitting section 17 is adjusted so that the power level becomes equal to that of the echo wave returning to the partner radar according to the distance between the partner radar and the own aircraft. Signal control for controlling the power level of the interfering wave transmitted from the transmitting unit 17 so as to gradually shift from the power level change of the echo wave returning to the other radar in accordance with the change in the distance between the other radar and the own aircraft (Control means). The configuration diagram is the same as FIG.

Next, the operation will be described. In the sixth embodiment, the output power of the interfering wave is changed on the time axis, and the target radar is mislocated with the dimensions of distance, speed, and signal power by cooperating with the operation of distance deception or speed deception. I do. FIG. 8 is an explanatory diagram showing the effect of the signal repeater according to the sixth embodiment of the present invention.
As shown in (a), when the aircraft approaches the opponent radar, the power level of the true echo wave received by the opponent radar gradually increases, but the power of distance deception or speed deception as deception interference. It is preferable that the levels go away or deceive the location. However, as shown in FIG. 8B, if the power level of the true echo wave received by the other party's radar is changed so as to be contrary to the change of the power level from the beginning, the other party's radar will detect the change. . Therefore, in the signal controller according to the sixth embodiment, FIG.
As shown in (c), the power level of the interfering wave transmitted from the transmitting unit 17 is controlled so that the power level becomes equal to that of the echo wave returning to the other radar in accordance with the distance between the other radar and the own aircraft. The power level of the interfering wave transmitted from the transmitting unit 17 is controlled so as to gradually deviate from the power level change of the echo wave returning to the other radar in accordance with the change in the distance between the other radar and the own aircraft.

As described above, according to the sixth embodiment, the change of the actual distance to the own aircraft from the interference wave of the distance deception or the speed deception of the power level close to the echo wave for the partner radar is as follows. , Because it will receive the interference wave of distance deception or speed deception by the shifted power level change, it will be difficult to detect the interference level due to the power deception, and it will be more difficult to determine the position of the aircraft itself Can be done.

[0034]

As described above, according to the present invention, the first
And delay means for delaying the waveform of the intermediate frequency signal converted by the frequency conversion means by the selected delay line; and transmitting the interference signal of speed deception by the transmission means. Control means for controlling the delay means so that a delay line having a delay time approximating the pulse width of the intermediate frequency signal is selected. Even when a so-called look-through process is performed in which a radar wave is not received during transmission of the interference wave, a delay approximating the pulse width of the intermediate frequency signal converted by the first frequency converter by the delay unit. By delaying the waveform of the intermediate frequency signal by the time,
The second frequency conversion means can generate a high frequency signal based on all the waveforms of the intermediate frequency signal,
There is an effect that the fidelity of the interference wave of the speed deception transmitted by the transmission means with respect to the received radar wave can be increased, and the interference effect on the threat radar can be enhanced.

According to the present invention, the second memory for storing the waveform of the intermediate frequency signal converted by the first frequency converting means.
When the transmission means transmits the deceptive wave of velocity deception, the input / output delay time of the waveform of the intermediate frequency signal stored in the second waveform storage means is converted into the first frequency conversion means. And control means for setting a pulse width of the intermediate frequency signal converted by the control means so as to approximate the pulse width of the intermediate frequency signal. Even in the case of performing a so-called look-through process that does not receive a wave, the second waveform storage unit converts the intermediate frequency signal by the delay time approximating the pulse width of the intermediate frequency signal converted by the first frequency conversion unit. By delaying the waveform of the frequency signal, the second frequency conversion means can generate a high-frequency signal based on all the waveforms of the intermediate frequency signal and receive the signal. Enhance the fidelity of the interference wave velocity deception transmitted by the transmission means with respect to the radar wave, it is possible to enhance the interference effect of the threat radar. Also, compared to a delay unit that selects one of a plurality of delay lines,
The second waveform storage means has an effect that a fine delay time can be set.

According to the present invention, the waveform storage means for storing the waveform of the intermediate frequency signal converted by the first frequency conversion means, and the waveform storage means for transmitting the deceptive interference wave by the transmission means. The delay time of the input / output of the waveform of the intermediate frequency signal stored in is set, the interference wave of the distance deception is transmitted according to the delay time, and the transmission means transmits the interference wave of the speed deception. Control means for setting a delay time of input / output of the waveform of the intermediate frequency signal stored in the storage means so as to approximate a pulse width of the intermediate frequency signal converted by the first frequency conversion means. Therefore, when transmitting the interference wave of the speed deception by the transmission means, the radar wave is not received while the interference wave is being transmitted. By delaying the waveform of the intermediate frequency signal by a delay time approximating the pulse width of the intermediate frequency signal converted by the first frequency conversion means by the storage means, the second frequency conversion means A high frequency signal can be generated based on all the waveforms of the signal, and the fidelity of the speed deception interference signal transmitted by the transmitting means to the received radar wave is increased, and the interference effect on the threat radar is enhanced. Can be. Also, the delay time can be set more finely in the waveform storage means than in the delay means for selecting any one of the plurality of delay lines. Furthermore, since the waveform storage means is integrated into one for the common use of the distance deception and the speed deception, and the selection means is not required, there is an effect that the configuration can be simplified and the price can be reduced.

According to the present invention, there is provided speed detecting means for detecting the speed of the own device, and the control means, when transmitting the interference wave of the speed deception by the transmitting means, from the speed detected by the speed detecting means. Since the frequency of the high-frequency signal generated by the second frequency conversion means is changed so as to be gradually shifted, the actual movement can be improved by gradually shifting the interference wave of the speed deception from its own speed. By causing the other party's radar to recognize a faithful interference wave close to the above and gradually removing the interference wave from the speed gate of the other party's radar, there is an effect that it is possible to make the position estimation of the own aircraft more difficult.

According to the present invention, there is provided information storage means for storing output power information of the other radar corresponding to the pulse characteristics of the intermediate frequency signal, and the control means controls the intermediate frequency signal converted by the first frequency conversion means. Output power information of the other radar corresponding to the pulse characteristics of the signal is extracted from the information storage means, and the other radar is automatically connected to the other radar according to the output power information and the amplitude level of the intermediate frequency signal converted by the first frequency conversion means. The distance to the aircraft is estimated, and the power of the interfering wave transmitted from the transmitting means is controlled so that the echo wave returning to the other radar and the interfering wave returning to the other radar have the same power according to the distance. With this configuration, the opponent radar will receive an interference wave of distance deception or speed deception of electric power close to the echo wave, so it is possible to distinguish between the echo wave and the interference wave Scratches, there is an effect that can be the position location of the own apparatus more difficult.

According to the present invention, the control means controls the power of the interfering wave transmitted from the transmitting means so that the power becomes equal to the power of the echo wave returning to the other radar corresponding to the distance between the other radar and the own aircraft. And the power of the interfering wave transmitted from the transmitting means is controlled so as to gradually shift from the power change of the echo wave returning to the other radar in accordance with the change in the distance between the other radar and the own aircraft. Therefore, the other radar receives the interference wave of distance deception or speed deception from the distance deception or speed deception of power close to the echo wave and the distance departure or speed deception from the actual distance change with the own aircraft Therefore, there is an effect that it is possible to make the position estimation of the own device more difficult without being able to detect the interference wave due to the power deception from the received power.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a signal repeater according to Embodiment 1 of the present invention.

FIG. 2 is a timing chart showing an effect of the signal repeater according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram showing a signal repeater according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram showing a signal repeater according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram showing a signal repeater according to a fourth embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an effect of the signal repeater according to the fourth embodiment of the present invention.

FIG. 7 is a configuration diagram showing a signal repeater according to a fifth embodiment of the present invention.

FIG. 8 is an explanatory diagram showing an effect of the signal repeater according to the sixth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a conventional signal repeater.

FIG. 10 is a timing chart showing a problem of a conventional signal repeater.

[Explanation of symbols]

1 receiver, 2 frequency converter (first frequency converter), 3 local oscillator, 4 frequency analyzer, 5 coupler,
6 detector, 7 jamming section, 8 signal distributor, 9 noise signal generator, 10, 10c DRFM (waveform storage means), 1
0a DRFM (first waveform storage means), 10b DR
FM (second waveform storage unit), 12 switch (selection unit), 13 signal synthesizer, 14 frequency conversion unit (second frequency conversion unit), 15 local oscillator, 16 phase shifter,
17 transmission unit (transmission means), 19a to 19n delay line,
20a, 20b selection unit, 21 delay line bank (delay means), 22 to 24, 26, 28 signal processor (control means), 25 speedometer (speed detection means), 27 memory (information storage means).

Claims (6)

[Claims] A first frequency converter for converting a received radar wave into an intermediate frequency signal; a waveform storage unit for storing a waveform of the intermediate frequency signal converted by the first frequency converter; The delay line includes a plurality of delay lines each having a different time, and a selection unit that selects any one of the delay lines. The waveform of the intermediate frequency signal converted by the first frequency conversion unit is changed by the selected delay line. Delay means for delaying, selecting means for selecting and outputting the waveform of the intermediate frequency signal output from one of the waveform storing means and the delay means, and a waveform of the intermediate frequency signal selected by the selecting means. Generating a high frequency signal near the frequency of the received radar wave;
Frequency converting means, transmitting means for transmitting the high-frequency signal generated by the second frequency converting means as an interfering wave, and when the transmitting means transmits an interfering wave of distance deception, the selecting means Along with selecting the output of the waveform storage means, set the input / output delay time of the waveform of the intermediate frequency signal stored in the waveform storage means, and transmit an interference wave of distance deception according to the delay time, When transmitting the interference wave of the speed deception by the transmission means, the output of the delay means is selected by the selection means, and the delay approximated to the pulse width of the intermediate frequency signal converted by the first frequency conversion means is selected. Controlling the delay means so that a delay line having time is selected, and responding to a change in the frequency of the high-frequency signal generated by the second frequency conversion means. Signal repeat and control means for transmitting the interfering wave velocity deception. 2. A first frequency converting means for converting a received radar wave into an intermediate frequency signal, and a first waveform storing means for storing a waveform of the intermediate frequency signal converted by the first frequency converting means. And second waveform storage means for storing the waveform of the intermediate frequency signal converted by the first frequency conversion means; and output from one of the first waveform storage means and the second waveform storage means. Selecting means for selecting and outputting a waveform of the intermediate frequency signal to be output; and a second means for generating a high frequency signal near the frequency of the received radar wave based on the waveform of the intermediate frequency signal selected by the selecting means. Frequency conversion means, transmission means for transmitting the high-frequency signal generated by the second frequency conversion means as an interference wave, and when the transmission means transmits the interference wave of distance deception The output of the first waveform storage means is selected by the selection means, and the input / output delay time of the waveform of the intermediate frequency signal stored in the first waveform storage means is set. In the case of causing the disturbance wave of the distance deception to be transmitted and transmitting the disturbance wave of the speed deception by the transmission means, the output of the second waveform storage means is selected by the selection means and the second waveform storage is performed. The input / output delay time of the waveform of the intermediate frequency signal stored in the means is set so as to approximate the pulse width of the intermediate frequency signal converted by the first frequency converting means, and the second frequency converting means Control means for transmitting an interfering wave of speed deception according to a change in the frequency of the high-frequency signal generated by the signal repeater. 3. A first frequency conversion means for converting a received radar wave into an intermediate frequency signal, a waveform storage means for storing a waveform of the intermediate frequency signal converted by the first frequency conversion means, Second frequency conversion means for generating a high frequency signal near the frequency of the received radar wave based on the waveform of the intermediate frequency signal stored by the waveform storage means, and the high frequency signal generated by the second frequency conversion means. Transmission means for transmitting the high-frequency signal as an interference wave, and when transmitting the interference wave of the deception by the transmission means, the input / output delay time of the waveform of the intermediate frequency signal stored in the waveform storage means In the case where an interference wave of distance deception is transmitted according to the delay time and an interference wave of speed deception is transmitted by the transmission means, the intermediate frequency stored in the waveform storage means is transmitted. The input / output delay time of the waveform of the wave number signal is set so as to approximate the pulse width of the intermediate frequency signal converted by the first frequency conversion means,
Control means for transmitting an interference wave of speed deception according to a change in the frequency of the high-frequency signal generated by the frequency conversion means. 4. A speed detecting means for detecting the speed of the own device, wherein the control means gradually shifts from the speed detected by the speed detecting means when the transmitting means transmits the interference wave of the speed deception. The signal repeater according to any one of claims 1 to 3, wherein the frequency of the high frequency signal generated by the second frequency converter is changed as described above. 5. An apparatus according to claim 1, further comprising information storage means for storing output power information of a counterpart radar in accordance with pulse characteristics of the intermediate frequency signal, wherein said control means controls said pulse characteristic of said intermediate frequency signal converted by said first frequency conversion means. The output power information of the partner radar corresponding to the target radar is extracted from the information storage unit, and the partner radar and the own aircraft are determined based on the output power information and the amplitude level of the intermediate frequency signal converted by the first frequency conversion unit. Control the power of the interfering wave transmitted from the transmitting means so that the echo wave returning to the other radar and the interfering wave returning to the other radar have the same power according to the distance. The signal repeater according to any one of claims 1 to 4, characterized in that: 6. The control means controls the power of the interfering wave transmitted from the transmitting means so that the power becomes equal to the power of the echo wave returning to the partner radar according to the distance between the partner radar and the own aircraft. 6. The power of an interfering wave transmitted from a transmitting means is controlled so as to gradually deviate from a power change of an echo wave returning to the other radar in accordance with a change in a distance between the other radar and the own aircraft. A signal repeater as described.