JPH11177535A - Communication distturbing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the communication disturbing system that recognizes and separates an FH wave from a mixture of FH and CW waves and provides effective disturbance to the objective FH wave. SOLUTION: The system is provided with a time monitor 3 that identifies a radio wave appearing at a preset time interval or a time interval being an integer-fold of the preset time interval against a received wave as an FH wave to discriminate the FH wave and the frequency of the FH wave is given to a transmitter 4 as disturbance data, a disturbing wave with the frequency is sent from a transmission antenna 4a to disturb the FH communication of an enemy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication interfering device for interfering with communication of an enemy wave, and more particularly to a communication interfering device for interfering with a frequency-hopping modulated radio wave (frequency hopping wave). .

[0002]

2. Description of the Related Art FIG. 15 is a block diagram showing the configuration of a conventional communication jammer, wherein 21a is a receiving antenna, 21 is a receiver, 22 is a frequency analyzer, 24 is a transmitter, and 24a is a transmitting antenna. is there. The radio wave received by the receiving antenna 21a is detected by the receiver 21 and then transmitted to the frequency analyzer 2
The appearance frequency is analyzed in 2, and the frequency that needs interference among the analyzed frequencies is given to the transmitter 24 as interference specifications. The transmitter 24 transmits a jamming radio wave from the transmitting antenna 24a based on the above jamming data, and jams an enemy wave.

[0003]

However, in the communication jammer having the above configuration, a CW wave (continuous wave; continuous wave) which is a general radio wave modulated and transmitted at a specific frequency is used.
FH wave (Frequency Hoppinni), which is effective only for uuus wave, and is a radio wave transmitted after being frequency-hopped and modulated like FH communication.
g Wave). FIG.
FIG. 4 is a diagram showing a time change of the frequency of a radio wave in an airspace situation in which H communication and CW communication are mixed, where a CW wave is continuously transmitted at a specific frequency for a long time, while an FH wave has a wide frequency range. Is transmitted while changing the transmission frequency. Therefore, in the conventional communication jammer, since the FW wave and the CW wave cannot be distinguished from each other, as the interference with the HF wave, as shown in a hatched portion in FIG. Alternatively, since there is no choice but to disturb all bands at once, the disturbing effect on FW waves can be efficiently performed,
In addition, there is a problem that it cannot be performed effectively.

The present invention has been made to solve the above problems, and recognizes and separates an FH wave from a situation where an FH wave and a CW wave are mixed, and has an effect on a target FH wave. It is an object of the present invention to provide a communication jamming device capable of giving a general jamming.

[0005]

According to a first aspect of the present invention, there is provided a communication interfering apparatus for determining a radio wave appearing at a predetermined time interval or an integer multiple thereof with respect to a received wave as an FH wave. An FH wave determining means for extracting information necessary for interference is provided to identify the FH wave and transmit a radio wave which interferes with the target FH wave.

According to a second aspect of the present invention, there is provided a communication interfering device provided with a synchronization determining means for determining a radio wave appearing at a constant interval after the output of a radio wave of a certain frequency is completed as an FH wave from the same target. .

According to a third aspect of the present invention, when a radio wave of a low frequency of appearance appears in a radio wave of a high frequency of occurrence mixed with a radio wave of a high frequency of appearance, the radio wave of a low frequency of occurrence is determined to be an FH wave. F to extract necessary information for interference
An H wave determining means is provided to transmit a radio wave that interferes with a target FH wave.

According to a fourth aspect of the present invention, there is provided a communication interfering device provided with azimuth detecting means for detecting a direction of arrival of a received wave.
It is determined to be a wave.

According to a fifth aspect of the present invention, there is provided a communication interfering device including direction detecting means for detecting a direction of arrival of a received wave, and when a radio wave having the same arrival direction appears at a certain interval, the radio wave is transmitted from the same target. The FH wave is determined.

According to a sixth aspect of the present invention, there is provided a communication disturbance apparatus including a direction detecting means and a synchronization determining means, and after the output of a radio wave of a certain arrival direction is completed, a radio wave having the same arrival direction appears at a certain interval. When this radio wave is transmitted from the same target as FH
It is determined to be a wave.

According to a seventh aspect of the present invention, there is provided a communication interfering device provided with level determining means for detecting a level of a received wave, and when a radio wave having the same incoming level appears at certain intervals, the radio wave is transmitted to the FH from the same target. It is determined to be a wave.

According to another aspect of the present invention, there is provided a communication disturbance apparatus comprising a modulation scheme determining means for detecting a modulation scheme of a received signal, and when radio waves of the same modulation scheme appear at certain intervals, the radio waves are determined to be FH waves. It is something to do.

According to a ninth aspect of the present invention, there is provided a communication jamming device provided with a synchronism judging means. When the radio wave of the same modulation method appears at a certain interval after the output of the radio wave of a certain modulation method is completed, the synchronism judging means is provided. The radio waves are determined to be FH waves from the same target.

According to a tenth aspect of the present invention, there is provided a communication disturbance apparatus comprising a modulation speed determining means for detecting a modulation speed of a received signal, and when a radio wave having the same modulation speed appears at a certain interval, the radio wave is determined to be an FH wave. It is something to do.

According to the eleventh aspect of the present invention, there is provided a communication interfering device provided with a synchronization determining means. The radio wave of the frequency is determined to be the FH wave.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a block diagram showing a configuration of a communication jamming device according to Embodiment 1 of the present invention.
1a is a receiving antenna, 1 is a broadband receiver, 2 is a frequency analyzer that analyzes the frequency of a received wave, 3 is a device that measures and monitors the appearance time of each frequency of the received wave and determines whether the received wave is an FH wave. A time monitor as FH wave determination means for determining
Reference numeral 4 denotes a transmitter for transmitting an interference wave, and reference numeral 4a denotes a transmitting antenna. The reception wave in which the FH wave and the CW wave received by the reception antenna 1a are mixed is detected by the receiver 1,
The frequency is analyzed by the frequency analyzer 2 capable of real-time analysis such as the FFT method or the filter bank method,
The appearance frequency is sent to the time monitor 3. Since the FH wave is transmitted by hopping a plurality of discrete frequencies set by the hopping rate at a constant interval T, when monitoring the appearing frequency over a wide band, as shown in FIG. Appear at the interval T described above. Time monitor 3
Measures the appearance time for each frequency from each appearance frequency identified by the frequency analyzer 2, and determines that the radio wave of the frequency appearing at a preset interval or an integer multiple thereof is an FH wave, The frequency of the above-mentioned FH wave is given to the transmitter 4 as the disturbance specification. The transmitter 4 transmits an interference wave of the above-mentioned frequency from the transmission antenna 4a and interferes with the enemy's FH communication. When the ally is also performing the FH communication, by giving each frequency of the ally's FH wave to the frequency analyzer 2 or the time monitor 3 in advance, the enemy FH wave and the ally's FH wave can be given.
Distinguish from H wave.

Embodiment 2 FIG. In the first embodiment, only the frequency of the FH wave to be disturbed is specified by the time monitor 3. However, as shown in FIG. A synchronism judging unit 5 for judging radio waves appearing at regular intervals as FH waves from the same target is provided, and FH waves from the same target can be identified. That is, the FH transmitter transmitting the FH wave is:
Usually, it is constituted by a single transmitter, since the transmitted one by one wave while switching the hopping frequency of the transmission radio wave, for example, as shown in FIG. 4, appearing after the output of the frequency f ₁ is completed The frequency f ₂ and the frequency f ₃ appearing after the end of the frequency f ₂ are sequentially listed, and the frequencies f ₁ , f ₂ , f ₃ ,.
It is determined that the signal is an FH wave (FH wave 2 in FIG. 4) from the transmitter (the same target). As described above, the communication jammer of the second embodiment can identify FH waves from the same target.
When a plurality of FH communications coexist, it is possible to thoroughly interfere with a specific target, and it is possible to more effectively interfere with the enemy's FH communication.

Embodiment 3 In the first embodiment, F
The time monitor 3 is provided as the H wave determining means, and the appearance time for each frequency is measured and monitored to determine whether the received wave is the FH wave. As shown in FIG. A frequency monitor 6 for calculating the frequency of appearance of the same frequency per time is provided, and when a radio wave of a low frequency appears in a mixture with a radio wave of a high frequency, the radio wave of a low frequency appears. The FH wave may be determined. That is, a radio wave used for general communication (CW that performs modulation of AM, FM, FSK, PSK, etc.)
(Wave) communicates without changing the frequency, whereas the FH wave used in the FH communication transmits information of the same length as shown in FIG. In this case, the frequency of appearance at the same frequency per unit time is sufficiently small. Therefore, a radio wave having a low frequency of occurrence is specified from the received waves, the radio wave having the specified frequency is determined to be an FH wave, and the frequency of the FH wave is given to the transmitter 4 as interference specifications. Thus, the enemy's FH communication can be effectively blocked.

Embodiment 4 In the third embodiment, only the frequency of the FH wave to be disturbed is specified by the frequency monitor 6, but as shown in FIG.
And a radio wave direction measuring device 7b and a direction judging device 7c, which are provided with direction detecting means for detecting the direction of arrival of the received wave to detect the direction of the received wave. Among the radio waves of the infrequent frequencies, the radio waves whose arrival directions are the same can be determined as the FH waves from the same target. That is, since the FH waves of the same target are transmitted from a single transmitter, the direction of arrival of the radio waves does not change even if the transmission frequency changes (hops). Therefore,
Even when a plurality of FH communications are mixed, by identifying the FH waves of the same target by the azimuth detecting means, it is possible to thoroughly interfere with a specific target.

Embodiment 5 In the first embodiment, only the frequency of the FH wave to be disturbed is specified by the time monitor 3, but as shown in FIG. 8, the communication disturbing device of FIG. An azimuth detecting means provided with an azimuth determination unit 7b and an azimuth determination unit 7c is provided, and the radio waves whose arrival directions are the same among the radio waves determined to be FH waves by the time monitor 3 are set to the same target as in the fourth embodiment. FH from
By judging as a wave, it is possible to thoroughly disturb a specific target.

Embodiment 6 FIG. In the fifth embodiment, the radio wave whose arrival direction is the same is determined as the FH wave from the same target by the azimuth detecting means. However, as shown in FIG.
The communication disturber is provided with a synchronism judging device 5 for judging radio waves appearing at a fixed interval after the output of radio waves of a certain frequency to be FH waves from the same target. When the radio waves appear at the intervals of, the radio waves are determined to be FH waves from the same target, whereby the determination accuracy of the FH waves can be further improved.

Embodiment 7 In the first embodiment, the time monitor 3 specifies only the frequency of the FH wave to be disturbed. However, as shown in FIG. 10, the communication disturber of FIG. A level determiner 8 for detecting the level is provided, and the incoming level of the radio wave determined to be the FH wave by the time monitor 3 is measured, and the radio waves having the same incoming level can be determined as the FH waves from the same target. . That is, since the same target FH wave is transmitted from a single transmitter, the distance between the transmitter and the receiving antenna 1a is constant, and the reception level does not change. Therefore, even when a plurality of FH communications are mixed, the FH wave of the same target can be specified by the level determination unit 8 and the specific target can be thoroughly interfered.

Embodiment 8 FIG. In the first embodiment, only the frequency of the FH wave to be disturbed is specified by the time monitor 3. However, as shown in FIG. 11, the communication disturbing device of FIG. A modulation method judging means for detecting the modulation method of the received wave is provided, comprising a modulation judgment device 9b and a modulation judgment device 9c. When a radio wave of the same modulation method appears at a certain interval, the radio wave is judged to be the same target FH wave. be able to. That is, even if the frequency of the FH wave of the same target changes (hops), the hopping modulation (2
The modulation system of the primary modulation before (secondary modulation) does not change. Therefore, even when a plurality of FH communications are mixed, it is possible to specify the FH wave of the same target by the modulation scheme determining means and to thoroughly interfere with the specific target.

Embodiment 9 In the eighth embodiment, the FH waves of the same target are specified by the modulation scheme determination unit.
As shown in FIG. 12, when the synchronism determiner 5 is provided in the communication jammer of FIG. 11 and radio waves of the same modulation scheme appear at certain intervals after output of radio waves of a certain modulation scheme ends. By determining this radio wave as the FH wave of the same target, the accuracy of the determination of the FH wave can be further improved.

Embodiment 10 FIG. In the first embodiment,
Although only the frequency of the FH wave to be disturbed is specified by the time monitor 3, as shown in FIG. 13, the communication disturbing apparatus shown in FIG.
b and a modulation speed determiner 10c for detecting the modulation speed of the received wave. When a radio wave having the same modulation speed appears at a certain interval, the radio wave is determined to be the same target FH wave. can do. That is, even if the frequency of the FH wave of the same target changes (hops), the data transfer rate (modulation rate) does not change. Therefore, even when a plurality of FH communications coexist, it is possible to specify the FH wave of the same target by the modulation speed determining means and to thoroughly interfere with the specific target.

Embodiment 11 FIG. In the tenth embodiment, the FH waves of the same target are specified by the modulation speed determination means. However, as shown in FIG. 14, the communication interference device of FIG. After the output is completed, when radio waves of the same modulation speed appear at certain intervals, the radio waves are determined to be the same target FH waves, so that the accuracy of FH wave determination can be further improved.

[0028]

As described above, the communication jamming device according to the first aspect of the present invention applies a radio wave appearing at a preset time interval or a time interval of an integral multiple thereof to the received wave at FH.
FH wave determining means for determining a wave is provided to identify an FH wave,
Since the radio wave that interferes with the target FH wave is transmitted, the FH wave can be accurately recognized and separated from the situation where the FH wave and the CW wave are mixed, and the target FH wave can be transmitted. It can provide effective interference.

Further, the communication jamming device according to the second aspect of the present invention is provided with a synchronism judging means so that the radio waves appearing at a fixed interval after the output of the radio wave of a certain frequency is completed can be transmitted to the FH from the same target.
Since it is determined to be a wave, FH waves from the same target can be reliably identified. Therefore, when a plurality of FH communications are mixed, it is possible to thoroughly interfere with a specific target, The FH communication can be more effectively blocked.

According to a third aspect of the present invention, when a radio wave of a low frequency of appearance appears in a radio wave of a high frequency of appearance mixed with a radio wave of a high frequency of appearance, the radio wave of a low frequency of occurrence is determined to be an FH wave. FH wave determination means is provided to transmit a radio wave that interferes with the target FH wave.
The H wave can be accurately recognized and separated, and the target FH wave can be effectively disturbed.

Further, the communication jamming device according to the fourth aspect of the present invention is provided with azimuth detecting means to determine radio waves having a low appearance frequency and the same direction of arrival as FH waves from the same target. FH waves can be reliably identified, and a specific target can be thoroughly interfered with.

Further, the communication jamming device according to a fifth aspect of the present invention is provided with an azimuth detecting means, and determines that the radio wave is an FH wave from the same target when the radio wave having the same arrival direction appears at a certain interval. Therefore, FH waves from the same target can be reliably identified, and when a plurality of FH communications are mixed, a specific target can be thoroughly interfered.

Further, the communication interfering device according to claim 6 is provided with a synchronization determining means, and when the output of the radio wave of the same arrival direction appears at a certain interval after the output of the radio wave of a certain arrival direction is completed, Since the radio waves are determined to be FH waves from the same target, the accuracy of FH wave determination can be further improved.

Further, the communication disturbance apparatus according to the present invention is provided with a reception level determining means, and when radio waves having the same incoming level appear at certain intervals, the radio waves are determined to be FH waves from the same target. So that F from the same goal
H waves can be reliably identified, and when a plurality of FH communications are mixed, a specific target can be thoroughly interfered.

Further, the communication jamming device according to claim 8 is provided with a modulation method judging means, and when an electric wave of the same modulation method appears at a certain interval, the electric wave is judged as an FH wave. FH waves from the same target can be reliably identified, and when a plurality of FH communications are mixed, a specific target can be thoroughly interfered.

Further, the communication jamming device according to the ninth aspect is provided with a synchronism judging means, and when a radio wave of the same modulation system appears at a certain fixed interval after the output of the radio wave of a certain modulation system is completed. Since this radio wave is determined to be an FH wave from the same target, the accuracy of determining the FH wave can be further improved.

Further, the communication interfering device according to claim 10 is:
Modulation speed determination means is provided so that when radio waves of the same modulation speed appear at certain intervals, the radio waves are determined to be FH waves, so that FH waves from the same target can be reliably identified, and a plurality of FH waves can be identified. When communications are mixed, a specific target can be thoroughly disturbed.

Further, the communication interfering device according to claim 11 is
Synchronization determining means is provided so that after the output of the radio wave of a certain modulation speed is completed, when the radio wave of the frequency of the same modulation speed appears at a certain fixed interval, the radio wave of this frequency is determined as the FH wave. , FH wave determination accuracy can be further improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a communication jamming device according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing characteristics of an FH wave appearing in a wide band at regular intervals.

FIG. 3 is a configuration diagram of a communication jammer according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a situation where a plurality of FH waves are mixed.

FIG. 5 is a configuration diagram of a communication jammer according to a third embodiment of the present invention.

FIG. 6 is a diagram showing the frequency of occurrence of the frequencies of the FH wave and the CW wave.

FIG. 7 is a diagram showing a configuration of a communication jammer according to a fourth embodiment.

FIG. 8 is a diagram showing a configuration of a communication jammer according to a fifth embodiment.

FIG. 9 is a diagram showing a configuration of a communication jammer according to a sixth embodiment.

FIG. 10 is a diagram showing a configuration of a communication jammer according to a seventh embodiment.

FIG. 11 is a diagram showing a configuration of a communication jammer according to an eighth embodiment.

FIG. 12 is a diagram showing a configuration of a communication jammer according to a ninth embodiment.

FIG. 13 is a diagram showing a configuration of a communication jammer according to a tenth embodiment.

FIG. 14 is a diagram showing a configuration of a communication jammer according to an eleventh embodiment.

FIG. 15 is a configuration diagram of a conventional communication jammer.

FIG. 16 is a diagram showing a situation where an FH wave and a CW wave are mixed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Broadband receiver, 1a, 7a, 9a, 10a Receiving antenna, 2 frequency analyzer, 3 time monitor, 4 transmitter, 4a transmitting antenna, 5 synchronism judging device, 6
Frequency monitor, 7b Radio direction measuring device, 7c Direction determining device, 8 level determining device, 9b Modulation measuring receiver, 9c
Modulation judgment device, 10b Modulation speed measurement receiver, 10c Modulation speed judgment device

Claims (11)

[Claims] 1. A communication jammer for extracting information necessary for jamming from frequency information of a received wave and transmitting jamming waves,
A communication disturbance apparatus comprising frequency hopping wave determination means for determining a radio wave appearing at a predetermined time interval or an integer multiple thereof as a frequency hopping wave and extracting information necessary for interference. 2. The synchronism judging means according to claim 1, further comprising a synchronism judging means for judging a radio wave appearing at a constant interval after the output of the radio wave of a certain frequency is completed as a frequency hopping wave from the same target. Communication jammer. 3. A communication jammer for extracting information necessary for jamming from frequency information of a received wave and transmitting the jamming wave,
Frequency hopping, in which radio waves with a low frequency of appearance appear as frequency hopping waves when radio waves with a low frequency of occurrence appear mixed with radio waves with a high frequency of appearance, and extract information necessary for interference A communication interfering device comprising a wave determining means. 4. An azimuth detecting means for detecting a direction of arrival of a received wave, wherein a radio wave whose appearance frequency is low and whose direction of arrival is the same is determined as a frequency hopping wave from the same target. Item 3. A communication disturbance device according to Item 3. 5. An azimuth detecting means for detecting an arrival direction of a radio wave, wherein when a radio wave having the same arrival direction appears at a certain interval, the radio wave is determined to be a frequency hopping wave from the same target. The communication interfering device according to claim 1, wherein 6. A synchronism judging means for judging a radio wave appearing at a constant interval after the output of a radio wave of a certain frequency to be a frequency hopping wave from the same target is provided, and the output of a radio wave of a certain arrival direction is completed. 6. The communication jammer according to claim 5, wherein when a radio wave having the same arrival direction appears at a certain interval, the radio wave is determined to be a frequency hopping wave from the same target. 7. A level determining means for detecting a level of a received wave, wherein when radio waves having the same incoming level appear at regular intervals, the radio waves are determined to be frequency hopping waves from the same target. The communication jammer according to claim 1, wherein: 8. A modulation method determining means for detecting a modulation method of a received wave, wherein when a radio wave of the same modulation method appears at a certain interval, the radio wave is determined as a frequency hopping wave. The communication interfering device according to claim 1, wherein 9. A synchronism judging means for judging radio waves appearing at a constant interval after the output of a radio wave of a certain frequency to be a frequency hopping wave from the same target, and the output of a radio wave of a certain modulation method is completed. 9. The communication interfering device according to claim 8, wherein when a radio wave of the same modulation scheme frequency appears at a certain fixed interval, the radio wave is determined to be a frequency hopping wave from the same target. 10. A modulation speed determining means for detecting a modulation speed of a received signal, wherein when a radio wave having the same modulation speed appears at a certain interval, the radio wave is determined to be a frequency hopping wave. The communication interfering device according to claim 1, wherein 11. A synchronism judging means for judging radio waves appearing at a constant interval after the output of a radio wave of a certain frequency is determined to be a frequency hopping wave from the same target, and the output of a radio wave of a certain modulation speed is completed. 11. The communication jammer according to claim 10, wherein, when a radio wave of a frequency having the same modulation speed appears at a certain fixed interval, the radio wave of this frequency is determined as a frequency hopping wave.