JP2997677B1 - Communication jammer - Google Patents

Abstract

The present invention provides a communication jamming device capable of realizing communication jamming with improved jamming efficiency for communication by a communication wave spread over a wide band. [MEANS FOR SOLVING PROBLEMS] In a communication jamming device for jamming communication by a communication wave spread over a wide band, a storage means for storing the communication wave received by a receiving antenna,
Transmission means for amplifying the communication wave stored in the storage means and transmitting it as an interference wave, provided between the reception antenna and the storage means, the communication wave among the reception waves received by the reception antenna is Filter means for passing the signal and removing signals other than the communication wave was provided.

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 using communication waves spread over a wide band, for example, communication using a spread spectrum system.

[0002]

2. Description of the Related Art Conventionally, as a communication interfering device for interfering with a communication device performing a spread spectrum communication system, for example, a communication interfering device disclosed in Japanese Patent Application Laid-Open No. Hei 5-91088 (hereinafter referred to as a first communication interfering device) is disclosed. Or a communication interfering device (hereinafter referred to as a second conventional technology) described in Japanese Patent Application Laid-Open No. 10-200513.

For example, a communication jammer described in the first related art captures a synchronization signal of a communication to be jammed, stores the synchronization signal, and intermittently transmits the synchronization signal as jamming radio waves. Pseudo-synchronization is caused between the devices, and the disruption of the communication due to the pseudo-synchronization interrupts the original communication between the communication devices. (Refer to FIG. 6 and FIG. 10 of the publication, although the repeat processing means 14 is disclosed, but since the signal generator 4 and the modulator 7 are provided, Are also assumed to cause generator disturbance.)

The communication jammer described in the second prior art further has a synchronization judging means 13 for controlling the frequency detecting means 11 so as not to transmit an jamming wave with respect to the frequency used for communication. Has also gone.

[0005]

However, since the conventional communication jammer is configured as described above, for example,
In the communication jamming device described in the related art, if there is no erroneous synchronization between the communication devices, communication disruption does not occur and the communication cannot be jammed, and the communication jamming described in the second related art does not occur. In the device, in order to generate the signal source of the interference wave by the signal transmitter and the modulator, the frequency detection means analyzes the radio wave characteristics (frequency, modulation method) and the like of the spread spectrum communication wave to be interfered, and spreads the spectrum. In order to transmit a signal equivalent to a communication wave as an interference wave (since so-called generator interference is adopted), it takes time to analyze the radio wave specifications, making it difficult to respond to high-speed frequency hopping communication. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and realizes communication interference with improved interference efficiency with respect to communication using communication waves spread over a wide band, for example, communication using a spectrum communication system. It is an object of the present invention to provide a new communication jamming device capable of performing the above.

[0007]

According to a first aspect of the present invention, there is provided a communication interfering apparatus for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; Storage means for storing the communication wave thus obtained, transmission means for amplifying the communication wave stored in the storage means and transmitting it as an interfering wave, provided between the reception antenna and the storage means, The communication wave among the reception waves received by the antenna is passed,
A filter means for removing signals other than the communication wave is provided.

[0008] The filter means of the communication disturbance apparatus according to the second aspect of the present invention sets a frequency for removing signals other than the communication wave based on the frequency of the unnecessary wave detected by the unnecessary wave detecting means. .

According to a third aspect of the present invention, the filter means of the communication disturbance apparatus sets a frequency for removing signals other than the communication wave based on the frequency of the target communication wave detected by the target communication wave detecting means. It is.

According to a fourth aspect of the present invention, the filter means of the communication jamming apparatus comprises: a frequency spreading means for temporally linearly converting the frequency of the received wave received by the receiving antenna; and a frequency converting means for converting the frequency by the frequency spreading means. Compression means for temporally compressing a signal with a dispersion delay line having a characteristic opposite to that of the frequency conversion, and a time gate circuit for passing a compressed signal of the frequency of the communication wave with respect to the signal temporally compressed by the compression means It consists of:

According to a fifth aspect of the present invention, there is provided a communication interfering apparatus for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; and a plurality of the communication units received by the receiving antenna. Storage means for storing each of the waves, transmission means for amplifying and transmitting the plurality of communication waves stored in the storage means as an interference wave,
A filter unit provided between the reception antenna and the storage unit, for passing the plurality of communication waves among the reception waves received by the reception antenna, and removing signals other than the plurality of communication waves, Filter control for switching the frequency of the filter means based on the frequency of the target communication wave detected by the target communication wave detection means so that time-division interference can be applied to a plurality of communication waves redundantly received by the reception antenna. Means.

According to a sixth aspect of the present invention, there is provided a communication interfering apparatus for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; and the communication wave received by the receiving antenna. Storage means for storing, signal identification processing means for identifying a communication control signal from a communication wave stored in the storage means, and a communication control signal of the communication wave identified by the signal identification processing means as an interference signal Transmission means for transmitting.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing a basic configuration of a communication jammer according to the present invention. In FIG. 1, reference numeral 1 denotes a reception antenna, and 2 denotes a high-frequency amplifier for amplifying a reception wave received by the reception antenna 1 to a desired power. 3 is a frequency converter for converting the reception wave amplified by the high frequency amplifier 2 into a low frequency band;
Reference numeral 4 denotes a local signal generator for setting a frequency range to be converted by the frequency converter 3, and reference numeral 5 denotes a filter means for passing a signal of a communication wave whose frequency is known in advance from a signal whose frequency has been converted by the frequency converter. , 6 are storage means such as a waveform memory for storing a signal waveform of a communication wave that has passed through the filter means, and 7 is a memory for storing and reading out the waveform memory based on the reception content of the communication wave to be obstructed received by the receiving antenna 1. Is a frequency converter for converting the signal read from the storage means 6 into the same high frequency band as the communication wave, and 9 is stored in the storage means 6 by the frequency converter 8. A transmitter 10 for amplifying and transmitting an interference wave converted to the same frequency as a communication wave to a desired power and transmitting antenna 10 for transmitting the interference wave. In the communication disturbance apparatus according to the present invention, the receiving means is constituted by the receiving antenna 1, the high-frequency amplifier 2 and the frequency converter 3, and the transmitting means is constituted by the transmitter 9 and the transmitting antenna 10.

Next, the operation of the communication jammer shown in FIG. 1 will be described in detail with reference to FIGS. 2 is an explanatory diagram of a radio wave environment showing a radio wave environment in which the communication jamming device shown in FIG. 1 is placed. FIG. 3 is a filter characteristic diagram showing a filter characteristic of the filter means 5 of the communication jamming device shown in FIG. 1
FIG. 7 is an explanatory diagram of jamming waves showing jamming waves transmitted from the communication jamming device shown in FIG. Now, consider transmitting jamming radio waves in a radio wave environment as shown in FIG. In FIG. 2, f1 to f3 indicate the frequencies of the communication waves to be disturbed, and f4 and f5 indicate the frequencies of the communication waves, that is, the interference prohibition waves.

As shown in FIG. 2, the received waves of each frequency received by the receiving antenna 1 are amplified to a desired level by the high-frequency amplifier 2, and thereafter, are subjected to frequency conversion by the local signal generated by the local signal generator 4. 3, the signal converted to the low frequency band by the frequency converter 3 is passed only by the communication wave to be disturbed by the filter means 5 having the filter characteristics shown in FIG. In FIG. 3, f1 ′ to f5 ′ correspond to frequencies obtained by converting the frequencies f1 to f5 of the received wave shown in FIG. The filter characteristic shown in FIG. 3 is a signal f corresponding to a communication wave to be disturbed.
The storage means 6 samples the signals f1 'to f3' corresponding to the communication wave to be disturbed, which have passed through the filter means 5, at high speed, and digitally passes the signals f1 'to f3'. Convert to a signal and store.

The storage means 6 can store a signal having a frequency bandwidth fB, but only the communication wave to be disturbed is passed by the filter means 5, and the stored signal corresponds to the communication wave to be disturbed. Only the signal waveform is obtained. The signal waveform stored in the storage unit 6 is read out by the storage unit 6 based on the timing control of the timing control unit 7, D / A converted, converted into a high frequency range by the frequency converter 8, and the communication wave to be disturbed. After being amplified to the desired power by the transmitter 8,
The signal is transmitted to the space by the transmitting antenna 9 as jamming radio waves.

When there is no communication wave to be disturbed, the signal waveform is not recorded in the storage means 6, so that the switching of storage and reading of the waveform signal by the timing control means 7 is performed for the communication wave to be disturbed. The duration can be sufficiently shorter than the duration, and the jamming radio wave can be transmitted during the period in which the communication wave to be jammed exists. Therefore, the transmitted jamming radio wave is as shown in FIG. 4, and the jamming wave is transmitted only during the period in which the communication wave to be jammed exists, and the unnecessary jamming operation of transmitting the jamming radio wave to unnecessary waves and the like is performed. Can be prevented, and the interference efficiency with respect to communication by the spread communication wave can be improved. It can be easily presumed that the same effect can be obtained by operating the filter means 5 on the signal read by the storage means 6.

As described above, by controlling the signal waveform stored in the storage means 6 by the filter means 5 to only the signal corresponding to the communication wave to be disturbed, transmission of the disturbing wave to the disturbing prohibited frequency is prevented. In addition, it is possible to prevent a wasteful interference operation of transmitting an interference wave with respect to unnecessary waves such as noises, and it is possible to increase the interference efficiency with respect to communication by spread communication waves, for example, spread spectrum communication. Further, by switching the storage and readout of the signal waveform in the storage means 6 faster than the target communication wave, it is possible to transmit the jamming radio wave only during the period in which the jamming target wave exists, thereby further increasing the jamming efficiency. be able to.

FIG. 5 is an operation explanatory diagram for explaining an outline of the operation of storing and reading out the waveform signal in the storage means 6, and shows a state where the communication wave in the same communication system changes from f1 to f2. As shown in FIG.
By switching the storage and readout timing of the signal waveform at high speed and within the duration of the communication wave, it is possible to transmit the jamming wave during the period when the communication wave to be jammed exists. Can follow and transmit the jamming signal even if f1 changes from f1 to f2,
It is possible to effectively transmit jamming radio waves even for communication in which the frequency changes, such as frequency hopping communication. As described above, by switching the storage and reading of the storage means 6 faster than the existence time of the communication wave to be disturbed, the interference wave is transmitted only during the period when the communication wave to be disturbed exists. An interference wave can be transmitted following a change in the frequency, and communication efficiency synchronized with the change in the communication wave can be realized, thereby greatly improving the interference efficiency.

Embodiment 2 Next, a communication jammer according to another embodiment of the present invention will be described with reference to FIG. The communication disturbance apparatus according to the above-described embodiment is relatively effective when only one disturbance target wave exists on one frequency, but the frequency is switched over a wide band, and a plurality of such communication systems exist. In such a situation, the frequency band to be switched is shared, and since the frequency is not fixed, a signal other than the communication wave to be disturbed is detected in real time and the band to be removed by the filter means 5 is controlled. Is required. FIG. 6 is a block diagram showing a communication interfering device according to the present embodiment suitable for a situation where communication is performed by changing the frequency over a wide band and a plurality of communication systems exist.

In FIG. 6, reference numeral 11 denotes unnecessary wave detection processing means for detecting a communication wave other than the communication wave to be disturbed, and the other components are substantially the same as those of the communication disturbing apparatus shown in FIG. A detailed description of these will be omitted. The unnecessary wave identification in the unnecessary wave detection processing means 11 is performed by:
For example, the process is performed based on the arrival direction of radio waves, the reception level, and the like. If the unnecessary wave detection processing means 11 determines that the direction of arrival of the radio wave is not the direction of arrival of the communication wave to be obstructed, the frequency of the communication wave is instructed to the interference filter means 5, and the frequency of the frequency is determined by the filter means 5. The passband is set so as to remove the communication wave.

Next, a specific operation will be described. Unwanted wave detection processing means 11 detects a frequency of an unnecessary wave from radio waves existing in the air, and when this frequency is set in filter means 5, filter means 5 removes a communication wave of this frequency as an unnecessary wave. Then, only the communication wave to be obstructed is passed and recorded in the storage means 6. The storage means 6
The operation of transmitting the waveform signal recorded in the communication block as a jamming wave is the same as that of the communication jamming device according to the embodiment. Therefore, even in a situation in which the frequency of the unnecessary wave is constantly switched and the frequency of the communication wave to be obstructed is shared, the communication obstruction device according to the present embodiment allows the interference wave to be transmitted only to the communication wave to be obstructed. It is possible to transmit, and it is possible to realize communication disturbance with higher disturbance efficiency.

Embodiment 3 FIG. Next, a communication jammer according to another embodiment of the present invention will be described with reference to FIG. The communication jamming device according to the second embodiment is a relatively effective means when there are relatively few signals other than the communication wave to be jammed (hereinafter referred to as jamming wave). In a situation where there are many signals other than the above and the number of signals to be disturbed is small, it is difficult to give the filter means 5 a desired pass characteristic, and it is desirable to control the filter means 5 to pass the signals to be disturbed. . FIG. 7 is a block diagram showing a communication jammer according to the present embodiment.

In FIG. 7, reference numeral 12 denotes target detection processing means for detecting a target wave. The target detection processing means 12 identifies unnecessary waves and the like based on, for example, the direction of arrival of radio waves, the reception level, and the like. In the drawings, the same reference numerals indicate the same or corresponding parts, and a detailed description thereof will be omitted. Next, the operation will be described. The target detection processing unit 12 detects the frequency of the interference target wave from the radio waves existing in the air, and sets the detected frequency in the filter unit 5 as the frequency of the interference target wave. When the frequency is set by the target detection processing unit 12, the filter unit 5 allows only the communication wave of the set frequency to pass, and only the waveform signal of the interference target wave is recorded in the storage unit 6. The operation of reading out the waveform signal recorded in the storage means 6 and transmitting it as a jamming radio wave is the same as that of the communication jammer according to the above embodiment. Therefore, when the number of interference target waves is small, the above-described embodiment. 2 has the same effect as that of the communication interfering device, and the control of the pass characteristic of the filter means 5 is simplified.

Embodiment 4 Next, a communication jammer according to another embodiment of the present invention will be described with reference to FIG. FIG. 8 is a block diagram showing a communication jammer according to another embodiment of the present invention. In FIG. 8, reference numeral 13 denotes a spread signal generator which is a frequency spread means for generating a signal whose frequency changes with time as shown in FIG.
And 18 denote mixers a and b for frequency-converting a signal input by a signal from the spread signal generator 13, and 15 and 17 denote compression means, each of which has a time-frequency characteristic as shown in FIG. The delay line a and the dispersion delay lines b and 16 are time gate circuits which are controlled so as to pass only the compressed signal having the frequency of the interference wave with respect to the time-compressed signal. Means are configured. In the figure,
The same reference numerals indicate the same or corresponding parts, and a detailed description thereof will be omitted.

Next, the operation will be described in detail with reference to FIGS. The reception wave received by the reception antenna 1 is amplified by the high-frequency amplifier 2 and converted into a low-frequency band by the frequency converter 3. The received wave frequency-converted by the frequency converter 3 is frequency-converted by the mixer a14 using a signal having the time-frequency characteristic shown in FIG. 9 generated from the spread signal generator 13, and the frequency-converted signal waveform is A chirp signal as shown in FIG. When a chirp signal as shown in FIG. 11A is passed through a dispersion delay a15 having an inverse characteristic as shown in FIG. 10, the chirp signal is temporally compressed as shown in FIG. A compressed pulse is generated with a time delay proportional to the frequency input to a14. Specifically, the appearance time of the compression pulse is proportional to the frequency (for example, 10 MHz
In the case of z, the pulse is one second later, and in the case of 20 MHz, the pulse is two seconds later. ). Then, by passing the signal of the appearance time of the compressed pulse corresponding to the frequency of the disturbance wave by the time gate circuit 16, the compression pulse by the signal other than the target communication wave is removed, and only the disturbance wave passes.

Further, the compressed pulse of the object wave passing through the time gate circuit 16 is converted into a signal similar to the object wave via the dispersion delay line b17 and the mixer b18 in the reverse procedure of the generation of the compressed pulse. And stored in the storage means 6. The operation of transmitting the stored waveform signal as an interference wave is the same as that of the above-described embodiment, and a detailed description thereof will be omitted. Therefore, according to the communication interfering device according to the present embodiment, the first embodiment. In this case, the same effect as that of the communication interfering device is obtained, and control for passing the interfering object wave is achieved by the time gate circuit 16, so that a filter circuit having complicated passing characteristics is not required, and the filter means is simply configured. can do.

Embodiment 5 Next, a communication jammer according to another embodiment of the present invention will be described with reference to FIG. FIG. 12 is a block diagram showing a communication disturbance device according to the present embodiment. The communication disturbance device according to the present embodiment is applied to the filter means 5 in accordance with the frequency of the disturbance wave detected by the target wave detection means 12. In FIG. 12, reference numeral 19 denotes a filter control means for controlling a pass band of the filter means 5. In the drawings, the same reference numerals indicate the same or corresponding parts,
A detailed description of these will be omitted.

Next, the operation will be described. The communication jammer according to the present embodiment is also the same as the above embodiment. In the same way as in the communication disturbance device of No. 3, only the disturbance wave from the received waves passed through the filter means 5 is stored in the storage means 6, and the stored waveform signal of the communication wave is transmitted as a disturbance wave. However, if a plurality of jamming waves exist in the air at the same time, and if jamming waves are transmitted to the jamming waves at the same time, the power of the jamming waves is dispersed and reduced. In this case, if a desired J / S is not obtained, no matter how much jamming radio waves are transmitted, no jamming effect is obtained and a wasteful jamming operation is performed.

Therefore, the existence of a plurality of interfering waves is detected by the target wave detection processing means 12 and their frequencies are input to the filter control means 19.
By performing control to sequentially set and change the pass band of the filter means 5 for each frequency detected in,
Waveform signals corresponding to these communication waves are sequentially input and stored in the storage means 6. Then, by synchronizing the switching timing of recording / reading in the storage means 6 with the switching timing in the filter control means 19, a plurality of jamming radio waves are transmitted in a time-division manner. Communication interruption can be realized. As described above, according to the communication jamming device according to the present embodiment, in a case where a plurality of communication waves from a plurality of communication systems are received at the same time and a jamming wave is transmitted simultaneously to these communication waves. Embodiment 3 above. As a result, the same effect as that of the communication jamming device can be obtained, and jamming power can be used efficiently, and jamming efficiency can be greatly improved.

FIG. 13 is an explanatory diagram of jamming radio waves for explaining a situation in which jamming radio waves are transmitted for a plurality of communication waves received at the same time from the communication jamming device shown in FIG. FIG.
As shown in (1), when a plurality of communication waves are disturbed by the communication disturbance apparatus according to the present embodiment, the disturbance power can be reduced as compared with the case where a single communication wave is disturbed. However, on the contrary, the interference time is shortened, and the interference effect due to the interference time is reduced as compared with the case where a single communication wave is interrupted. Therefore, the above embodiment. As described with reference to FIG. 5 in FIG. 1, the switching between the storage and the reading of the storage unit 6 is performed faster than the existence time of the communication wave to be disturbed, so that the communication wave to be disturbed exists. It is possible to transmit the interfering wave only during the period and to transmit the interfering wave following the change of the frequency. In the communication interfering apparatus according to the present embodiment, the storage unit 6 can switch between storing and reading at a higher speed. It is also desirable to increase the interference time.

Embodiment 6 FIG. Next, a communication jammer according to another embodiment of the present invention will be described with reference to FIGS. FIG. 14 is a block diagram showing a communication jammer according to the present embodiment.
Is a signal identification processing means for extracting a communication control signal of the communication wave from the signal of the communication wave stored in the storage means 6. In the drawings, the same reference numerals denote the same or corresponding parts, and a detailed description thereof will be omitted.

Next, the operation will be described with reference to FIG. FIG. 15 is an explanatory diagram showing an outline of an interference operation of the communication interference device shown in FIG. The communication wave includes a communication control signal for performing communication with another communication device,
In the communication disturbance apparatus according to the present embodiment, the communication control signal of the target wave is also stored in the storage means 6 under the control of the timing control means 7. The waveform signal stored in the storage means 6 is taken in by the signal identification processing means 20, and the communication control signal is identified by the signal identification processing means 20, and the identified communication control signal is extracted from the waveform signal.
Then, the communication control signal identified by the signal identification processing means 20 is stored in the storage means 6, read out from the storage means 6 under the control of the timing controller means 7, and transmitted as an interference signal wave.

As an example of the identification of the communication control signal in the signal identification processing means 20, for example, in the case of communication in which an ARQ communication procedure is performed, the communication control signal is received as an acknowledgment when data can be transmitted normally as a communication control signal. ACK from side
Since the signal is transmitted and this ACK signal is usually very short compared to the data, the stored signal identifies the presence of short data after the long signal, which is considered data, and identifies this by AC.
This is possible by extracting the signal as a K signal. FIG.
As shown in (1), the communication disturbing device according to the present embodiment transmits the ACK signal stored in storage means 6 as a disturbing signal wave, so that the original communication data is disturbed by the disturbing signal wave between the transmitting station and the receiving station. As a result, the receiving side cannot receive the original communication data. Although the receiving station cannot recognize that the communication data has been received, the receiving station receives the ACK signal, which is an interference wave, during a standby time for a response after data transmission, and recognizes that the communication station has received the communication data normally. The data is transferred to the transmission procedure, and a communication state mismatch between the transmitting station and the receiving station of the communication occurs, which causes confusion in the communication between the transmitting station and the receiving station. In the communication interfering device according to the present embodiment, for example, the case of the communication in which the communication procedure of the ARQ scheme is performed has been described as an example, but the communication of the other scheme or the communication procedure may be performed. The same effect can be obtained by transmitting the communication control signal as a disturbing signal wave even in another method.

As described above, according to the communication jamming device of the present embodiment, the communication control signal of the communication wave is transmitted as the jamming signal wave, so that the communication state mismatch between the transmitting station side and the receiving station side. This causes confusion in the communication between the transmitting station and the receiving station and can hinder the exchange of the original communication data between the transmitting station and the receiving station.

[0036]

As described above, according to the first aspect of the present invention, in a communication jamming device for jamming communication by a communication wave spread over a wide band, a reception antenna and a signal received by the reception antenna are used. Storage means for storing the communication wave, transmission means for amplifying and transmitting the communication wave stored in the storage means as an interference wave, and the reception antenna provided between the reception antenna and the storage means. Filter means for passing the communication wave out of the received waves received and removing signals other than the communication wave is provided. Can be transmitted as waves, anti-jamming frequency,
That is, transmission of unnecessary waves can be prevented, and the communication disturbance efficiency can be greatly improved.

According to the second aspect of the present invention, the filter means sets the frequency for removing signals other than the communication wave based on the frequency of the unnecessary wave detected by the unnecessary wave detecting means. Even if there are a plurality of communication systems, even if there are a plurality of communication waves to be interfered, each time it is possible to store a waveform signal from which signals other than the communication waves have been removed and transmit each as an interference wave, The transmission of the interference prohibition frequency, that is, the unnecessary wave can be prevented, and the communication interference efficiency can be greatly improved.

According to the third aspect of the present invention, the filter means sets a frequency for removing signals other than the communication wave based on the frequency of the target communication wave detected by the target communication wave detecting means. Therefore, it is possible to prevent the transmission of undesired waves, that is, unnecessary waves, thereby greatly improving the communication interference efficiency, and when there are a small number of communication waves to be interfered and there are many signals other than the communication waves to be interfered. Thus, control of the filter means can be easily performed.

According to the fourth aspect of the present invention, the filter means includes a frequency spreading means for time-linearly converting the frequency of the received wave received by the receiving antenna, and a frequency converting means for converting the frequency of the received wave by the frequency spreading means. Compression means for temporally compressing the compressed signal by a dispersion delay line having the inverse characteristic of the frequency conversion, and a time gate for passing a compressed signal of the frequency of the communication wave with respect to the signal temporally compressed by the compression means. Since it is composed of a circuit, even if there are a large number of communication waves to be obstructed, it is possible to easily realize the filter means without giving a complicated passing characteristic.

According to a fifth aspect of the present invention, there is provided a communication interfering apparatus for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; and a plurality of the communication units received by the receiving antenna. Storage means for storing the respective waves; transmission means for amplifying the plurality of communication waves stored in the storage means and transmitting the amplified communication waves as interference waves; provided between the reception antenna and the storage means; Filter means for passing the plurality of communication waves out of the reception waves received by the antenna and removing signals other than the plurality of communication waves, and time for the plurality of communication waves redundantly received by the reception antenna. Filter control means for switching the frequency of the filter means based on the frequency of the target communication wave detected by the target communication wave detection means so as to add interference to the division Since the provided, the disturbance of the division can be sent when for a plurality of communication waves stored in the storage means, the interference efficiency can be further greatly improved.

According to the sixth aspect of the present invention, there is provided a communication disturbance apparatus for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna and the communication wave received by the receiving antenna. Storage means for storing, a signal identification processing means for identifying a communication control signal from a communication wave stored in the storage means, and a communication control signal of the communication wave identified by the signal identification processing means as an interference signal Since the transmission means for transmitting is provided, it is possible to transmit the control signal of the communication to be disturbed as a disturbing wave, and the communication is disturbed due to a mismatch in the communication state between the transmitting station and the receiving station communicating by the disturbing communication wave. Can be caused.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a communication disturbance apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a radio wave environment showing an example of a radio wave environment in which the communication jamming device shown in FIG. 1 is placed;

FIG. 3 is a filter characteristic diagram showing a filter characteristic of a filter unit of the communication jamming device shown in FIG. 1;

FIG. 4 is an explanatory diagram of jamming waves showing jamming waves transmitted from the communication jamming device shown in FIG. 1;

FIG. 5 is a diagram illustrating storage of a waveform signal in a storage unit 6;
FIG. 4 is an operation explanatory diagram for describing an outline of a read operation;

FIG. 6 is a block diagram showing a communication interfering device according to another embodiment of the present invention.

FIG. 7 is a block diagram showing a communication jammer according to another embodiment of the present invention.

FIG. 8 is a block diagram showing a communication interfering device according to another embodiment of the present invention.

9 is a spread signal characteristic diagram showing a time-frequency characteristic of a spread signal generator of the communication jammer shown in FIG. 7;

10 is a dispersion delay characteristic diagram illustrating time-frequency characteristics of a dispersion delay line of the communication jamming device illustrated in FIG. 7;

11 is an operation characteristic explanatory diagram for describing an outline of operation characteristics of the communication jamming device shown in FIG. 7;

FIG. 12 is a block diagram showing a communication interfering device according to another embodiment of the present invention.

13 is a jamming situation explanatory diagram showing the situation of jamming radio waves transmitted from the communication jamming device shown in FIG. 12;

FIG. 14 is a block diagram showing a communication interference device according to another embodiment of the present invention.

FIG. 15 is an explanatory diagram showing an outline of an interference operation of the communication interference device shown in FIG. 12;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reception antenna 2 high-frequency amplifier 3, 8 frequency converter 4 local signal generator 5 filter means 6 storage means 7 timing control means 9 transmitter 10 transmission antenna 11 unnecessary wave detection processing means 12 target wave detection processing means 13 frequency spreading means 14 , 18 mixer 15, 17 distributed delay line 16 time gate 19 filter control means 20 signal identification processing means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04K 3/00 WPI (DIALOG)

Claims (6)

(57) [Claims] 1. A communication jammer for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; storage means for storing the communication wave received by the receiving antenna; Transmission means for amplifying the stored communication wave and transmitting it as an interference wave, provided between the reception antenna and the storage means, the communication wave among the reception waves received by the reception antenna is passed,
A communication jammer comprising: a filter for removing a signal other than the communication wave. 2. The communication according to claim 1, wherein the filter means sets a frequency for removing signals other than the communication wave based on a frequency of the unnecessary wave detected by the unnecessary wave detection means. Jamming device. 3. The filter according to claim 1, wherein a frequency for removing a signal other than the communication wave is set based on a frequency of the target communication wave detected by the target communication wave detecting means. Communication jammer. 4. The filter means comprises: frequency spreading means for time-linearly converting the frequency of a reception wave received by the reception antenna; and a signal having the inverse characteristic to the frequency conversion of a signal frequency-converted by the frequency spreading means. And a time gate circuit that passes a compressed signal of the frequency of the communication wave with respect to a signal temporally compressed by the compressing means. The communication disturbance device according to claim 1. 5. A communication interfering apparatus for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; a storage unit for storing a plurality of the communication waves received by the receiving antenna; Transmitting means for amplifying and transmitting the plurality of communication waves stored in the storage means as interference waves, provided between the reception antenna and the storage means, among the reception waves received by the reception antenna, Filter means for passing a plurality of communication waves and removing signals other than the plurality of communication waves, and a target communication so as to add time-division interference to a plurality of communication waves redundantly received by the reception antenna. Communication disturbance, comprising: filter control means for switching the frequency of the filter means based on the frequency of the target communication wave detected by the wave detection means. apparatus. 6. A communication jammer for interfering with communication by a communication wave spread over a wide band, comprising: a receiving antenna; storage means for storing the communication wave received by the receiving antenna; Signal identification processing means for identifying a communication control signal from the stored communication wave, and transmission means for amplifying the communication control signal of the communication wave identified by the signal identification processing means and transmitting the amplified communication control signal as an interference signal. Characteristic communication disturbance device.