JP2003294830A - Apparatus for automatically transmitting interfering signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic interfering signal transmitting apparatus capable of automatically transmitting an appropriate interfering signal to a reception signal from an unknown target. <P>SOLUTION: The automatic interfering signal transmitting apparatus is provided with a reception signal data value detecting means for detecting the data value of the reception signal in the case of the reception of the signal from the unknown target, an interfering signal data value determining means for determining the data value of the signal for interfering detection by the target on the basis of the data value detected by the reception signal data value detecting means, an interfering signal generating means for generating the interfering signal on the basis of the data value determined by the interfering signal data value determining means, and a transmitting means for transmitting the interfering signal generated by the interfering signal generating means. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic interference signal transmitter for automatically generating and transmitting an interference signal for obstructing detection by a target when a signal from an unknown target such as a radar device is received. Regarding

[0002]

2. Description of the Related Art FIG. 9 is a schematic diagram illustrating a conventional automatic interference signal transmitter. In the figure, 101 is a receiving antenna, 102 is a first intermediate frequency converting means, 103 is a received signal data value detecting means, 104 is a target specifying means, 105 is an interfering signal data value determining means, 106 is a modulator, and 107 is a first. 2 intermediate frequency conversion means, 108 is a power amplifier, and 109 is a transmission antenna. Further, the received signal parameter value detecting means 1
Reference numeral 03 denotes a frequency detection means (not shown) for detecting the frequency of the reception signal, a pulse width detection means (not shown) for detecting the pulse width of the reception signal, and a pulse repetition period (hereinafter, referred to as PRI) of the reception signal. PRI detection means (not shown) for detecting (referred to as). Further, the interference signal parameter value determining means 105 stores the parameter values of the interference signal that are optimal for interrupting the object detection by each target, for each target. Further, an editing device (not shown) for editing the stored contents is connected to the interfering signal specification value determining means 105.

The operation of this automatic interference signal transmitter will be described. First, the first intermediate frequency converting means 102 converts the frequency of the reception signal received by the receiving antenna 101 into an intermediate frequency. As a result, a high frequency received signal which cannot be processed by the internal circuit is converted into a low frequency signal which can be internally processed. The received signal specification detection means 103 is the first
Based on the received signal whose frequency has been converted by the intermediate frequency conversion means 102, the specification values (for example, frequency, pulse width, PRI, etc.) of the received signal at the receiving antenna 101 are detected. The target specifying means 104 specifies the source of the received signal, that is, the target on the basis of the detected specification values of the received signal, and determines the specified target as the interference signal specification value determining means 105.
Output to. The interference signal specification value determining means 105 determines the specification value of the interference signal to be transmitted to the target according to the specified target. Specifically, the three-specific values (frequency, pulse width, PRI) of the interfering signal previously associated with the target are output to the modulator 106. The modulator 106 modulates the received signal from the first intermediate frequency conversion means 102 based on the three specifications from the interference signal specification value determination means 105 to generate an interference signal. The interference signal generated by the modulator 106 is converted into the same frequency as that at the time of reception by the second intermediate frequency conversion means 107 and output to the power amplifier 108.
The power amplifier 108 is the second intermediate frequency conversion means 107.
The interference signal from is amplified in power and output to the transmitting antenna 109.

[0004]

Since the conventional automatic interfering signal transmitting apparatus is constructed as described above, it is possible to obstruct the detection by the target with respect to an unknown received signal whose target cannot be specified. Could not send signal. Further, it is necessary to know in advance the effective specification values of the interference signal for each target.

The present invention has been made in view of the above problems, and provides an automatic jamming signal transmitter capable of transmitting a suitable jamming signal to a received signal from an unknown target. Is.

[0006]

SUMMARY OF THE INVENTION An automatic interfering signal transmitter according to the present invention includes a received signal specification value detecting means for detecting a specification value of a received signal when a signal from an unknown target is received. An interference signal specification value determining means for determining specification values of a signal for preventing detection by the target based on the specification values detected by the reception signal specification value detecting means,
Interference signal generation means for generating an interference signal based on the specification values determined by the interference signal specification value determination means, and transmission means for transmitting the interference signal generated by the interference signal generation means to the target. With.

Further, in the automatic interference signal transmitter according to the present invention, the received signal data value detecting means detects the pulse width of the received signal, and the interference signal data value determining means detects the pulse width. The noise width of the interfering signal is determined based on the obtained pulse width.

In the interference signal automatic transmission apparatus according to the present invention, the interference signal specification value determining means determines the noise width of the interference signal by performing the following calculation. NW = (1 / PW) × K (1.1 <K <
1.3)

The automatic interference signal transmitter according to the present invention further comprises noise width correcting means for correcting the noise width determined by the interference signal specification value determining means based on a predetermined parameter.

Further, in the interference signal automatic transmission apparatus according to the present invention, the noise width determined by the interference signal parameter value determining means is corrected based on the pulse width detected by the received signal parameter value detecting means. It further comprises noise width correction means.

Further, in the interference signal automatic transmission device according to the present invention, the interference signal generating means, when the signal from the unknown target hops, sets the center frequency of the interference signal to be transmitted to the target. Match the hop frequency of the signal from the unknown target.

Further, in the automatic interference signal transmitter according to the present invention, the received signal data value detecting means detects the duty ratio of the received signal, and the interference signal data value determining means detects the duty ratio. The frequency of the disturbing signal is determined based on the determined duty ratio.

Further, in the automatic interference signal transmitter according to the present invention, the received signal data value detecting means detects the duty ratio of the received signal, and the interference signal data value determining means detects the duty ratio. The transmission timing of the interfering signal is determined based on the determined duty ratio.

Furthermore, in the interfering signal automatic transmitting apparatus according to the present invention, the received signal data value detecting means detects the pulse repetition period of the received signal, and the interfering signal data value determining means. The continuous transmission time of the interfering signal is determined based on the detected pulse repetition period.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. In the automatic disturbance signal transmitter according to the present invention, the specifications of the interference signal are directly determined from the specifications of the reception signal without specifying the emission source (that is, the target) of the reception signal. This makes it possible to transmit an appropriate interference signal even for an unknown target.

For example, in the first embodiment, the spread of the interference signal to be transmitted on the frequency axis, that is, the noise width of the interference signal is directly determined based on the pulse width of the reception signal from the target. Generally, in order to effectively interfere with object detection by a target, it is necessary to transmit an interference signal that covers the reception bandwidth of the target. However, if the target reception bandwidth is unknown, such an interfering signal cannot be generated. On the other hand, if an undesired signal having a wide noise width is transmitted for that reason, the power is unnecessarily spread and it is inefficient. Therefore, in the first embodiment, when the pulse width of the received signal is PW, (1 / PW) ×
An interference signal having a noise width of about K (where K is a real number within the range of 1.1 <K <1.3) is transmitted.

In general, since the target transmission bandwidth and the reception bandwidth are different, even if the target transmission bandwidth is known, the target reception bandwidth is unknown. However, the detection result of the target such as the radar device largely depends on the reception result in the bandwidth of (1 / PW) × K, and if the reception interference is performed in the bandwidth, a sufficient interference effect can be expected.

FIG. 1 is a schematic configuration diagram illustrating an automatic interference signal transmitter according to the first embodiment. In FIG. 1, 1 is a receiving antenna, 2 is a first intermediate frequency converting means, 3 is a received signal data value detecting means, 4 is an interfering signal data value determining means, 5
Is a modulator, 6 is a second intermediate frequency converting means, 7 is a power amplifier, and 8 is a transmitting antenna. Here, the received signal specification value detection means 3 detects the pulse width PW of the received signal input from the first intermediate frequency conversion means 2 and the pulse width detection means 31.
Equipped with. Further, the interference signal specification value determining means 4 calculates the following equation (1) using the pulse width PW detected by the pulse width detecting means 31 to determine the noise width NW of the interference signal. Equipped with. NW = (1 / PW) × K (1.1 <K <1.3) (1) where PW is the pulse width of the received signal in the automatic interference signal transmitter, K is a real number, and NW is It is the noise width of the interfering signal determined by the interfering signal specification value determining means 4. The unit system of PW is, for example, [μS].

The operation of this automatic interference signal transmitter will be described. The first intermediate frequency converting means 2 is a receiving antenna 1.
The received signal received at is converted from the frequency at the time of reception to an intermediate frequency that can be processed. The frequency-converted received signal is output to the pulse width detection means 31 and the modulator 5. The pulse width detecting means 31 detects the pulse width PW of the received signal at the receiving antenna 1 based on the received signal from the first intermediate frequency converting means 2 and outputs the detected pulse width PW to the noise width determining means 41. To do. The noise width determining means 41 calculates the above equation (1) based on the pulse width PW from the pulse width detecting means 31, and outputs the noise width NW obtained thereby to the modulator 5. The modulator 5 generates a disturbing signal having a noise width NW by modulating the received signal from the first intermediate frequency converting means 2 and outputs the generated disturbing signal to the second intermediate frequency converting means 6.
The second intermediate frequency converting means 6 converts the interfering signal from the modulator 5 into the same frequency as at the time of reception and outputs it to the power amplifier 7. The power amplifier 7 power-amplifies the interference signal from the second intermediate frequency conversion means 6 and outputs the amplified interference signal to the transmission antenna 8.

As described above, according to the automatic interference signal transmitter of the first embodiment, the noise width of the interference signal is determined by the calculation using the pulse width of the reception signal. Also, it becomes possible to transmit an appropriate interference signal. In particular, since the interference signal having the noise width according to the above equation (1) is transmitted to the target such as the radar device,
Even when the target reception bandwidth is unknown, sufficient detection interference can be performed. Note that here, the above formula (1)
Although the value of K in 1.1 was set to 1.1 <K <1.3, it is preferable to set K to around 1.2 from the viewpoint of the balance between the interference effect and the power efficiency.

Embodiment 2. In a general automatic interference signal transmitter, an error occurs between the designed transmission frequency and the actual transmission frequency due to the limit of component accuracy. In particular,
When a replacement oscillator is used as a component of the modulator 5 shown in FIG. 1, the error becomes large. In the second embodiment, such an error is stored in advance in the interference signal automatic transmission device as the frequency matching degree, and the spread of the interference signal on the frequency axis is expanded based on the frequency matching degree. As a result, even if the above error occurs, the interference signal can be reliably received by the target.

FIG. 2 is a schematic configuration diagram illustrating an automatic interference signal transmitter according to the second embodiment. In the figure, the same or corresponding parts as in FIG. Here, the interfering signal specification value determining means 4 further includes a frequency matching degree storing means 42 and a noise width correcting means 43 in addition to the noise width determining means 41. The operation will be described.
The frequency matching degree storage means 42 stores the frequency matching degree of the automatic interference signal transmitter in advance, and the noise width correcting means 43 determines the noise width determining means based on the frequency matching degree stored in the frequency matching degree storage means 42. The noise width from 41 is corrected. The modulator 5 performs modulation so that the noise width of the received signal from the first intermediate frequency converting means 2 becomes the noise width corrected and output by the noise width correcting means 43, and the modulated signal is subjected to the second intermediate frequency. Output to the conversion means 6. Other operations are the same as those in FIG.

As described above, in the second embodiment,
Since the spread of the jamming signal on the frequency axis is corrected based on the frequency matching degree of the jamming signal automatic transmitter, even if there is an error in component accuracy in the transmission frequency of the jamming signal automatic transmitter, the jamming is surely performed. The signal can be received by the target.

Embodiment 3. In the second embodiment,
The error between the designed value and the actual value that occurs at the transmission frequency of the automatic interfering signal transmitter is fixedly stored in the storage means as the frequency matching degree. However, since such an error varies with the pulse width of the received signal,
In the third embodiment, the frequency matching degree is changed according to the pulse width of the received signal.

FIG. 3 is a schematic configuration diagram illustrating an automatic interference signal transmitting apparatus according to the third embodiment. In the figure, parts that are the same as or correspond to those in FIG. In FIG. 3, reference numeral 44 denotes a frequency matching degree variable output means for variably changing and outputting the frequency matching degree based on the pulse width PW from the pulse width detecting means 31. Here, the noise width correction means 43 is based on the frequency matching degree output from the frequency matching degree variable output means 44, and the noise width determining means 41.
Correct the noise width from.

As described above, in the third embodiment,
Since the value of the frequency matching degree used for the correction of the noise width is variably changed according to the magnitude of the pulse width of the received signal,
It is possible to cause the target to receive the interference signal more effectively.

Fourth Embodiment A general target of a radar device or the like is to take countermeasures to change (hop) the transmission frequency when receiving a disturbance signal other than a signal transmitted by itself. On the other hand, when the transmission frequency of the radar device hops, if the noise width on the automatic interfering signal transmitter side is expanded so as to include the frequency of the hop destination, the power density of the interfering signal decreases, which is inefficient. . Therefore, when the transmission frequency of the radar device has a discrete value, the center frequency of the interference signal on the interference signal automatic transmission device side is set to the hop destination of the radar device side instead of expanding the noise width of the interference signal. It is preferable to match the frequency. The interference signal automatic transmission device shown in FIG. 1 is configured such that the center frequency of the interference signal output from the second intermediate frequency conversion means 6 substantially matches the center frequency of the received signal, and the above requirements are met. Be satisfied.

Embodiment 5. In Embodiments 1 to 4, the interference signal is generated by superimposing noise on the received signal. In the fifth embodiment, the interference signal is generated by minutely changing the frequency of the received signal.

The radar device for detecting the velocity of the object detects the velocity of the object based on the difference between the transmission frequency of itself and the reflection frequency from the object (that is, the Doppler effect).
Such velocity detection by the Doppler effect can be disturbed by finely changing the frequency of the received signal from the radar device and sending it back (so-called velocity deception).

Whether or not the received signal is intended for speed detection can be determined by examining the duty ratio of the received signal. The signal for speed detection has a feature that the duty ratio is high. Here, the duty ratio is the ratio (PW / PRI) of the pulse width (PW) of the received signal and the pulse repetition period (PRI) of the received signal.

FIG. 4 is a schematic configuration diagram illustrating an interference signal automatic transmission device according to the fifth embodiment. In the figure, the same or corresponding parts as in FIG. In FIG. 4, reference numeral 32 is a duty ratio detecting means for detecting the duty ratio of the received signal based on the output of the first intermediate frequency converting means 2. Further, reference numeral 45 is a speed deception instructing means for determining whether or not to perform the speed deception based on the level of the duty ratio detected by the duty ratio detecting means 32. Reference numeral 51 is a modulator that shifts the frequency of the output from the first intermediate frequency conversion means 2 when performing speed deception. The operation of the modulator 51 when the speed deception is not performed is arbitrary. For example, as shown in Embodiment 7 described later, the output from the first intermediate frequency conversion unit 2 is gradually increased by the delay amount. You may output.

The operation of this automatic interfering signal transmitter will be described. The first intermediate frequency converting means 2 is a receiving antenna 1.
The received signal received at is converted from the frequency at the time of reception to an intermediate frequency that can be internally processed. The duty ratio detecting means 32 detects the duty ratio of the received signal at the receiving antenna 1 based on the output of the first intermediate frequency converting means 2 and outputs the detection result to the speed deception instructing means 45.
The speed deception instructing means 45 uses the duty ratio detecting means 3
Based on the detection result of 2, speed deception is determined. For example, when the duty ratio is high, it is determined that the speed deception is to be performed, and when the duty ratio is low, the speed deception is not performed. In response to this determination, the modulator 51 shifts the frequency of the output of the first intermediate frequency converting means 2 and outputs it when performing deception. The second intermediate frequency converting means 6 performs the reverse conversion to that performed by the first intermediate frequency converting means 2 on the interference signal from the modulator 5, and outputs it to the power amplifier 7. The power amplifier 7 power-amplifies the interference signal from the second intermediate frequency conversion means 6 and outputs the amplified interference signal to the transmission antenna 8.

As described above, in the fifth embodiment, when the duty ratio of the received signal from the target is high, the purpose of the received signal is estimated to be speed detection, and the frequency of the received signal is slightly deviated. The generated interference signal is sent back. As a result, even if the target is unknown, it is possible to perform appropriate detection interference.

Sixth Embodiment In general, the pulse width of a Doppler radar that detects speed is as long as several [μS], while the time from reception to transmission (hereinafter referred to as device transit time) in an automatic jamming signal transmitter is several hundreds [ns].
Very short. Therefore, the automatic interfering signal transmitter receives and transmits the interfering signal transmitted by itself, and an oscillation operation occurs. Therefore, in the sixth embodiment, a delay unit for delaying the transmission timing of the interference signal is provided in the interference signal automatic transmission device.

FIG. 5 is a schematic configuration diagram illustrating an automatic interference signal transmitter according to the sixth embodiment. In the figure, parts that are the same as or equivalent to those in FIG. In FIG. 5, 9 is the first intermediate frequency conversion means 2
Is a signal delay means for delaying the signal from, for example, a delay line for delaying the transmission of the signal, a storage means for storing and holding the waveform of the signal, and the like. Further, 31 is a pulse detecting means for detecting the pulse width PW of the received signal based on the output of the first intermediate frequency converting means 2, and 46 is this pulse width detecting means 31.
It is a delay time control means for controlling the signal delay time in the signal delay means 9 based on the detection result of.

The operation of this transceiver will be described. The first intermediate frequency conversion means 2 converts the received signal received by the receiving antenna 1 from the frequency at the time of reception to an intermediate frequency that can be internally processed. The frequency-converted received signal is output to the pulse width detection means 31, the duty ratio detection means 32, and the signal delay means 9. The pulse detection means 31 detects the pulse width PW of the reception signal at the reception antenna 1 based on the output of the first intermediate frequency conversion means 2. When the pulse width PW is detected by the pulse width detection means 31, the delay time control means 46 sets the delay time in the signal delay means 9 to a time longer than the detected pulse width PW. For example, in the case where the signal delay means 9 is not provided in the automatic interfering signal transmitter, the signal delay is delayed by the addition time of the signal passing time from the receiving antenna 1 to the transmitting antenna 8 and the pulse width PW detected by the pulse width detecting means 31. In the means 9 the signal is delayed. Other operations are similar to those of the fifth embodiment.

As described above, in the sixth embodiment, since the delay means for delaying the transmission timing of the interference signal is provided in the automatic interference signal transmitter, the automatic interference signal transmitter transmits the interference signal transmitted by itself. It is possible to prevent the oscillation operation of receiving and transmitting. Here, the signal delay means 9 for delaying the transmission timing is provided in the modulator 51.
Although it is provided in the preceding stage, it may be provided in the subsequent stage.

Embodiment 7. In the fifth and sixth embodiments, the interference signal is generated by minutely changing the frequency of the received signal when the duty ratio is high (speed deception). In the seventh embodiment, the interference signal is generated by shifting the timing of the received signal (distance deception) when the duty ratio is low.

The radar device for detecting the distance to the object is
The distance to the object is detected by measuring the time difference until the transmitted signal is reflected by the target and received. Therefore, in order to erroneously detect this distance, a true reflection signal is generated on the side of the automatic interference signal transmitter, that is, an interference signal synchronized with the signal reflected by the mother board of the automatic interference signal transmitter is reflected. In addition, it is necessary to make the radar device recognize an erroneous signal as a reflected wave by shifting the transmission timing of the signal on the time axis.

FIG. 6 is a schematic explanatory view illustrating an automatic interference signal transmitter according to the seventh embodiment. In the figure, parts that are the same as or equivalent to those in FIG. In FIG. 6, reference numeral 47 is a distance deception instructing means for deciding whether or not to perform the distance deception based on the level of the duty ratio detected by the duty ratio detecting means 32.
Further, 91 is a signal delay means provided between the first intermediate frequency conversion means 2 and the second intermediate frequency conversion means 6,
When performing the distance deception, the output from the first intermediate frequency conversion means 2 is output while gradually increasing the delay amount. The second intermediate frequency converting means 6 converts the output from the signal delaying means 91 into a frequency at the time of reception and outputs it, and the power amplifier 7 power-amplifies the output of the second intermediate frequency converting means 6 and the transmitting antenna 8 Transmits this amplified signal.

As described above, in the seventh embodiment, when the duty ratio of the received signal from the target is high, the purpose of the received signal is estimated to be distance detection, and the transmission timing of the received signal is delicately determined. Send back to the target while shifting. As a result, even if the target is unknown, it is possible to perform appropriate detection interference.

Embodiment 8. Generally, if the disturbing signal is sent in synchronization with the received signal from the target, the disturbing signal can be transmitted to other targets during the non-transmission period of the disturbing signal, which is efficient. However, if the pulse repetition period of the received signal is short, a synchronization shift or the like occurs and the interference effect decreases. In the eighth embodiment, when the received signal from the target has a predetermined pulse repetition period or more,
The transmission timing of the interfering signal is synchronized with the received signal (for example, FIG. 7a), and when the received signal has a predetermined pulse repetition period or less, the interfering signal is continuously transmitted (for example, FIG. 7b).

FIG. 8 is a schematic configuration diagram illustrating an automatic interference signal transmitting apparatus according to the eighth embodiment. In the figure, the same or corresponding parts as in FIG. In FIG. 8, 33 is a PRI detecting means for detecting the pulse repetition period of the received signal in the receiving antenna 1 based on the output of the first intermediate frequency converting means 2, and 48 is a receiving means based on the detection result of the PRI detecting means 33. It is a continuous transmission instruction means for determining whether to transmit an interfering signal in synchronization with the signal or continuously transmit the interfering signal. The continuous transmission instructing means instructs the modulator 52 to continuously transmit the interfering signal when the pulse repetition interval is equal to or less than a predetermined value.
The modulator 52 generates a signal having the noise width determined by the noise width determination means 41 based on the output from the first intermediate frequency conversion means 2 and outputs the generated signal as an instruction from the continuous transmission instruction means 48. Based on this, intermittent (received signal synchronization) or continuity is switched and output to the second intermediate frequency conversion means.

As described above, in the eighth embodiment,
Since intermittent or continuous transmission of an interference signal is selected based on the pulse repetition period, efficient and highly effective detection interference can be performed.

[0045]

Since the present invention is constructed as described above, it has the following effects. In the automatic interfering signal transmitter according to the present invention, when a signal from an unknown target is received, received signal parameter value detecting means for detecting the parameter value of the received signal and the received signal parameter value detection means. Interference signal specification value determining means for determining specification values of a signal for interfering with detection by the target based on the specification values detected by the means, and specifications determined by the interference signal specification value determining means. Suitable for an unknown target, since it includes the disturbing signal generating means for generating the disturbing signal based on the original value and the transmitting means for transmitting the disturbing signal generated by the disturbing signal generating means to the target. It is possible to transmit various interference signals.

Further, in the interference signal automatic transmitting apparatus according to the present invention, the received signal parameter value detecting means detects the pulse width of the received signal, and the interference signal parameter value determining means detects the pulse width. Since the noise width of the disturbing signal is determined based on the generated pulse width, the disturbing signal for disturbing the object detection can be appropriately transmitted to the unknown target.

Further, in the automatic interference signal transmitter according to the present invention, the interference signal specification value determining means determines the noise width of the interference signal by performing the following calculation. It is possible to transmit a jamming signal having high power efficiency and a large jamming effect to a target whose bandwidth is unknown. NW = (1 / PW) × K (1.1 <K <1.3)

Further, the interference signal automatic transmitting apparatus according to the present invention further comprises noise width correcting means for correcting the noise width determined by the interference signal data value determining means on the basis of a predetermined parameter. Even if an error in component accuracy occurs in the transmission frequency of the automatic jamming signal transmitter, the jamming signal can be reliably received at the target.

In the automatic interference signal transmitter according to the present invention, the noise width determined by the interference signal parameter value determining means is corrected based on the pulse width detected by the received signal parameter value detecting means. Since the noise width correction means is further provided, even if an error in component accuracy occurs in the transmission frequency of the automatic interference signal transmitter, the interference signal can be received more reliably at the target.

Further, in the interference signal automatic transmission device according to the present invention, when the signal from the unknown target hops, the interference signal generating means sets the center frequency of the interference signal to be transmitted to the target. Since the signal from the unknown target is matched with the frequency of the hop destination, it is possible to perform detection interference with high power efficiency and high interference exchange.

In the automatic interference signal transmitter according to the present invention, the received signal data value detecting means detects the duty ratio of the received signal, and the interference signal data value determining means detects the duty ratio. Since the frequency of the disturbing signal is determined based on the determined duty ratio, the appropriate disturbing signal can be transmitted to the unknown target.

Further, in the automatic interference signal transmitter according to the present invention, the received signal data value detecting means detects the duty ratio of the received signal, and the interference signal data value determining means detects the duty ratio. Since the transmission timing of the disturbing signal is determined based on the determined duty ratio, the appropriate disturbing signal can be transmitted to the unknown target.

Further, in the automatic interfering signal transmitter according to the present invention, the received signal data value detecting means detects the pulse repetition period of the received signal, and the interfering signal data value determining means is Since the continuous transmission time of the disturbing signal is determined based on the detected pulse repetition period, it is possible to transmit the disturbing signal having a high disturbing effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram illustrating an interference signal automatic transmission device according to a first embodiment.

FIG. 2 is a schematic configuration diagram illustrating a jamming signal automatic transmission device according to a second embodiment.

FIG. 3 is a schematic configuration diagram illustrating an interference signal automatic transmission device according to a third embodiment.

FIG. 4 is a schematic configuration diagram illustrating an interference signal automatic transmission device according to a fifth embodiment.

FIG. 5 is a schematic configuration diagram illustrating an interference signal automatic transmission device according to a sixth embodiment.

FIG. 6 is a schematic explanatory diagram illustrating an interference signal automatic transmission device according to a seventh embodiment.

FIG. 7 is an explanatory diagram exemplifying intermittent and continuous transmission of a transmission signal in the automatic disturbance signal transmitter of the eighth embodiment.

FIG. 8 is a schematic configuration diagram illustrating an interference signal automatic transmission device according to an eighth embodiment.

FIG. 9 is a schematic configuration diagram illustrating a conventional automatic interference signal transmitter.

[Explanation of symbols]

PW pulse width, NW noise width, 1 receiving antenna, 2 first intermediate frequency converting means, 3 receiving signal parameter value detecting means, 4 interference signal parameter value determining means, 5,
51,52 modulator, 6 second intermediate frequency conversion means,
7 power amplifier, 8 transmitting antenna, 9, 91
Signal delay means, 31 pulse width detection means, 32 duty ratio detection means, 33 PRI detection means, 4
1 noise width determining means, 42 frequency matching degree storing means, 43 noise width correcting means, 44 frequency matching degree varying output means, 45 speed deception instructing means, 46 delay time controlling means, 48 continuous transmission instructing means.

Claims (9)

[Claims] 1. A received signal parameter value detecting means for detecting a parameter value of the received signal when a signal from an unknown target is received, and parameters detected by the received signal parameter value detecting means. Interference signal specification value determining means for determining specification values of a signal for interfering with detection by the target based on the value, and an interference signal based on the specification values determined by the interference signal specification value determining means An interference signal automatic transmission device comprising: an interference signal generation unit that generates the interference signal; and a transmission unit that transmits the interference signal generated by the interference signal generation unit to the target. 2. The reception signal parameter value detecting means detects the pulse width of the reception signal, and the interference signal parameter value determining means determines the noise width of the interference signal based on the detected pulse width. The automatic interfering signal transmitter according to claim 1, wherein the automatic interfering signal transmitter determines. 3. The automatic interference signal transmitter according to claim 2, wherein the interference signal specification value determining means determines the noise width of the interference signal by performing the following calculation. NW = (1 / PW) × K (1.1 <K <1.3) where PW is the pulse width of the received signal, K is a real number, and NW is the noise width of the interfering signal. 4. The interference signal according to claim 3, further comprising noise width correction means for correcting the noise width determined by the interference signal specification value determination means based on a predetermined parameter. Automatic transmitter. 5. A noise width correcting means for correcting the noise width determined by the interfering signal specification value determining means based on the pulse width detected by the reception signal specification value detecting means. The automatic jamming signal transmitter according to claim 3. 6. The interfering signal generating means, when a signal from the unknown target hops, sets the center frequency of the interfering signal to be transmitted to the target to a frequency to which the signal from the unknown target hops. The automatic jamming signal transmitter according to claim 2 or 3, characterized in that 7. The received signal specification value detecting means detects the duty ratio of the received signal, and the interference signal specification value determining means determines the frequency of the interference signal based on the detected duty ratio. The automatic interfering signal transmitter according to claim 1, wherein 8. The received signal specification value detecting means detects the duty ratio of the received signal, and the interference signal specification value determining means determines the transmission timing of the interference signal based on the detected duty ratio. The automatic interfering signal transmitter according to claim 1, wherein the automatic interfering signal transmitter determines. 9. The reception signal parameter value detecting means detects a pulse repetition period of the reception signal, and the interference signal parameter value determining means determines the continuation of the interference signal based on the detected pulse repetition period. The automatic interfering signal transmitter according to claim 1, wherein the transmitting time is determined.