JP3204902B2 - Radar jammer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar (Radar: Radio directio) capable of preventing the emission of unnecessary interference waves.
n and range finding) related to jammers.

[0002]

2. Description of the Related Art FIG. 9 shows a conventional DRFM (Digital Radium).
FIG. 2 is a configuration diagram illustrating a frequency memory (jamming) device. In the DRFM jammer 900, reference numeral 1 denotes a receiving antenna for receiving an incoming pulse (hereinafter, simply referred to as a "pulse") coming from the surrounding environment. The pulse received by the receiving antenna 1 is amplified and detected by the receiver 2. You. A DRFM 3 stores and reproduces a pulse amplified by the receiver 2, and is controlled by a DRFM control circuit 4. 5 is DRF
M is a transmitter for amplifying the reproduced pulse, and the amplified pulse is transmitted as an interference pulse by the transmission antenna 6.

Next, the operation of the DRFM jammer 900 will be described. First, a pulse transmitted by a radar to be obstructed is received by the receiving antenna 1, and the received pulse is amplified by the receiver 2. Subsequently, the amplified pulse is stored in DRFM3. The operation of storing the pulse is controlled by the DRFM control circuit 4 based on a storage trigger from the receiver 2.

Next, at the time of radar interference, the pulse stored in the DRFM 3 is reproduced based on the DRFM control signal from the DRFM control circuit 4. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 into space as an interference pulse.

[0005]

In the above-mentioned conventional DRFM jammer 900, all the pulses received by the receiving antenna 1 are stored in the DRFM3. However, since the storage capacity of the DRFM3 is limited, all the pulses are stored. Then DRFM
3 has a problem that the storage efficiency is reduced.

[0006] In addition, pulses coming from the surrounding environment include:
Since pulses necessary for radar interference and unnecessary pulses coexist, there is also a problem that when all received pulses are emitted into space, even unnecessary interference pulses are emitted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a radar jammer that facilitates gain design of a receiver, improves the storage efficiency of a DRFM, and does not emit unnecessary pulses. The purpose is to:

[0008]

In order to achieve the above object, a radar jammer according to the present invention divides an incoming pulse into a pulse necessary for generating an interference wave and a pulse unnecessary for generating an interference wave. In a radar jammer that includes an incoming pulse discriminating means for storing only pulses necessary for generating the interfering wave and emits an interfering wave by reproducing the stored pulse, the incoming pulse discriminating means includes an The configuration is characterized by being provided independently of the receiving system.

That is, according to the present invention, an incoming pulse contains both a pulse necessary for generating an interfering wave and an unnecessary pulse. Only the pulses needed to generate the waves were recorded. Therefore, the storage capacity of the pulse is small. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted. Further, according to the present invention, since the incoming pulse discriminating means is provided separately and independently, the gain design and the like of the receiving apparatus are facilitated.

In the radar interfering device according to the next invention, the incoming pulse discriminating means measures an incoming pulse based on the specifications of the incoming pulse, and compares the measured incoming pulse with reference data. Storage necessity determining means for determining the necessity of storage of the arriving pulse, and the arriving pulse measuring means and the storage necessity determining means determine the arriving pulse as necessary for generating an interference wave. The configuration is characterized in that the pulse is divided into a pulse and a pulse unnecessary for generation of an interference wave.

That is, according to the present invention, when dividing an incoming pulse into a pulse necessary for generating an interfering wave and an unnecessary pulse, first, the incoming pulse is measured based on the specifications of the incoming pulse, and the measured incoming pulse is measured. By comparing and comparing the pulse with the existing reference data, the necessity of storing the incoming pulse is determined. According to this configuration, by appropriately selecting the specifications and reference data of the arriving pulse according to the use environment, the arriving pulse can be divided with high accuracy, and the radar interference performance is improved.

[0012] The radar interfering device according to the next invention is characterized in that the specification of the incoming pulse is a frequency, a pulse width, a pulse repetition frequency, a scan period, a polarization, or a radio wave arrival direction. .

That is, the present invention is a specific example of the specifications of the above-mentioned incoming pulse. By using such various specifications, even if the use environment changes, the incoming pulse can be divided with high accuracy, and the radar interference performance can be improved.

In the radar interfering device according to the next invention, the incoming pulse discriminating means performs a correlation process by combining a plurality of data of the incoming pulse.

In other words, the present invention can be adapted to various conditions by combining various arriving pulse data, so that the arriving pulse can be more accurately separated into a necessary pulse and an unnecessary pulse. I can do it.

In the radar interfering device according to the next invention, the incoming pulse discriminating means includes an incoming pulse storing means for storing the incoming pulse, and an incoming pulse measuring means for measuring the incoming pulse based on the specifications of the incoming pulse. A storage necessity determining unit that determines the necessity of storage of the arrival pulse by comparing the measured arrival pulse with reference data, and an arrival pulse that erases the arrival pulse that the storage necessity determination unit determines as unnecessary. A erasing means is provided, and the incoming pulse is divided into a pulse necessary for generating an interference wave and a pulse unnecessary for generating an interference wave.

That is, according to the present invention, a necessary arriving pulse and an unnecessary arriving pulse are determined based on the specification of the arriving pulse and the reference data, and the unnecessary pulse is erased from the arriving pulse storage means. I did it.
For this reason, the storage efficiency of the incoming pulse storage means is improved, and the incoming pulse storage means can be used effectively. Furthermore, since only the pulses necessary for the generation of interference are reproduced,
Does not emit unwanted interference.

In the radar interfering device according to the next invention, the incoming pulse discriminating means includes an incoming pulse measuring means for measuring an incoming pulse based on the data of the incoming pulse, and comparing the measured incoming pulse with reference pulse data. Storage means for determining whether storage of the arriving pulse is necessary, and arriving pulse storage means for storing only the arriving pulse determined to be necessary by the storage necessity determining means. Is divided into a pulse necessary for generating an interference wave and a pulse unnecessary for generating an interference wave.

That is, according to the present invention, in the same manner as described above, a necessary arriving pulse and an unnecessary arriving pulse are determined based on the specification of the arriving pulse and the reference data, and only the arriving pulse determined as unnecessary is stored in the arriving pulse storage means. I did it.
For this reason, the operation of storing and erasing unnecessary incoming pulses can be omitted. Also, since only the necessary arriving pulses are stored, the storage efficiency of the arriving pulse storage means is improved, and the arriving pulse storage means can be effectively utilized. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

In the radar interfering device according to the next invention, the incoming pulse discriminating means includes an incoming pulse storing means for storing an incoming pulse, a frequency discriminating means for discriminating the frequency of the incoming pulse, and a discrimination reference for the discriminated incoming pulse. A storage necessity determining unit that determines the necessity of storage of the arriving pulse by collating with the data, and an arriving pulse erasing unit that erases the arriving pulse that the storage necessity determining unit determines as unnecessary, The present invention is characterized in that an incoming pulse is divided into a pulse necessary for generating an interference wave and a pulse unnecessary for generating an interference wave.

That is, the present invention is a specific example in the case where a frequency is used as the data of the above-mentioned incoming pulse. According to this configuration, the storage efficiency of the incoming pulse storage unit is improved, and the incoming pulse storage unit can be effectively used. Furthermore, since only the pulses necessary for the generation of interference are reproduced,
Does not emit unwanted interference.

In the radar interfering device according to the next invention, the incoming pulse discriminating means measures an incoming pulse based on the data of the incoming pulse, and checks the measured incoming pulse with reference pulse data. A storage necessity determining unit for determining whether the storage of the arriving pulse is necessary, an arriving pulse deleting unit for deleting the arriving pulse which the storage necessity determining unit determines as unnecessary by an RF delay circuit and an RF switch, Arriving pulse storage means for storing only the arriving pulse determined to be necessary by the storage necessity judging means, and dividing the arriving pulse into a pulse necessary for generating an interfering wave and a pulse unnecessary for generating an interfering wave. This is a structural feature.

That is, in the configuration of the present invention, an RF delay circuit and an RF switch are used, and before an incoming pulse is received,
Arrival pulses determined as unnecessary are deleted. For this reason, the storage efficiency of the incoming pulse storage means is improved, and the incoming pulse storage means can be used effectively. Also, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

In the radar interfering device according to the next invention, the incoming pulse discriminating means includes a pulse storage space means capable of storing a plurality of pulses, and a pulse storage space control means for controlling the pulse storage space. The feature of.

That is, according to the present invention, since the storage capacity is improved according to such a configuration, it becomes possible to cope with a plurality of arriving pulses, and the necessary arriving pulses can be efficiently stored.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a radar jammer according to the present invention will be described in detail with reference to the drawings. The present invention is not limited by the embodiment.

(First Embodiment) FIG. 1 is a configuration diagram showing a DRFM jammer according to a first embodiment of the present invention.

In this DRFM jammer 100, 1
Is a receiving antenna for receiving a pulse arriving from the surrounding environment. The pulse received by the receiving antenna 1 is amplified and detected by the receiver 2. Reference numeral 3 denotes a DRFM that stores and reproduces a pulse amplified by the receiver 2, and is controlled by a DRFM control circuit 4. Reference numeral 5 denotes a transmitter for amplifying the pulse reproduced by the DRFM. The amplified pulse is transmitted by the transmission antenna 6 as an interference pulse.

Reference numeral 7a denotes a frequency discriminator for discriminating the frequency of the received pulse. Reference numeral 8 denotes a pulse discrimination circuit that discriminates a pulse by comparing and collating the frequency of the discriminated pulse with the discrimination reference data (frequency) stored in the discrimination reference data memory 9.

Next, the operation of the DRFM jammer 100 will be described. The pulse (R
The F signal) is amplified and detected by the receiver 2 and stored in the DRFM 3. The operation of storing the pulse is controlled by the DRFM control circuit 4 based on a storage trigger from the receiver 2. On the other hand, the frequency of the pulse received by the receiver 2 is measured by the frequency discriminator 7a, and is transmitted to the pulse discriminating circuit 8 as frequency data.

The pulse discrimination circuit 8 compares the input frequency data with the discrimination reference frequency data recorded in the discrimination reference data memory 9. Then, it discriminates whether the pulse is necessary or unnecessary for generating the interference wave.

As a result of the discrimination, when it is determined that the pulse is a necessary pulse, the pulse discrimination circuit 8 sends a storage valid signal to the DRFM control circuit 4. The DRFM control circuit 4 that has received the storage enable signal holds the pulse stored in the DRFM 3 as it is.

As a result of the discrimination, when it is determined that the pulse is unnecessary, the pulse discrimination circuit 8 transmits a storage invalidation signal to the DRFM control circuit 4. In this case, the DRFM control circuit 4 erases the pulse stored in the DRFM 3.
Then, it waits for the next pulse to be overwritten.

Next, the DRF from the DRFM control circuit 4
The pulse stored in the DRFM 3 is reproduced based on the M control signal. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 as a disturbance pulse into space.

As described above, according to the DRFM jammer 100, only the pulse necessary for the jamming wave is stored.
The storage efficiency of M3 is improved, and DRFM3 can be used effectively. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

(Embodiment 2) FIG. 2 is a configuration diagram showing a DRFM jammer according to Embodiment 2 of the present invention.

The DRFM jamming device 200 has substantially the same configuration as the DRFM jamming device 100 of the first embodiment, but uses a signal processor 7b for analyzing pulse data instead of frequency for pulse discrimination. Are different.

The signal processor 7b can analyze various pulse data. The pulse specifications that can be used for this discrimination include, for example, pulse width, pulse repetition frequency,
Scan period, polarization, radio wave arrival direction, and the like are given. It is sufficient that the pulse data can be measured by the signal processor 7b.

The discrimination reference data memory 9 stores discrimination reference data corresponding to the various pulse data.

Further, it is also possible to perform more accurate discrimination by adding a correlation process by combining a plurality of pulse data.

The operation of the DRFM jammer 200 is substantially the same as the operation of the DRFM jammer 100 described above. The pulse (RF signal) received by the receiving antenna 1 is transmitted to the receiver 2
, And is stored in the DRFM3. The operation of storing the pulse is controlled by the DRFM control circuit 4 based on a storage trigger from the receiver 2. On the other hand, receiver 2
The pulse received at is measured by the signal processor 7b at a predetermined pulse specification (eg, pulse width), and is sent to the pulse discrimination circuit 8 as measurement data (pulse width data).

The pulse discrimination circuit 8 compares and compares the input measurement data with discrimination reference data (discrimination reference pulse width data) recorded in the discrimination reference data memory 9. Then, it discriminates whether the pulse is necessary or unnecessary for generating the interference wave.

As a result of the discrimination, when it is determined that the pulse is a necessary pulse, the pulse discrimination circuit 8 sends a storage valid signal to the DRFM control circuit 4. The DRFM control circuit 4 that has received the storage enable signal holds the pulse stored in the DRFM 3 as it is.

As a result of the discrimination, if it is determined that the pulse is unnecessary, the pulse discrimination circuit 8 sends a storage invalidation signal to the DRFM control circuit 4. In this case, the DRFM control circuit 4 erases the pulse stored in the DRFM 3.
Then, it waits for the next pulse to be overwritten.

Next, the DRF from the DRFM control circuit 4
The pulse stored in the DRFM 3 is reproduced based on the M control signal. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 as a disturbance pulse into space.

As described above, according to the DRFM jammer 200, various pulse data can be used. Therefore, even when the use environment changes, the pulses can be separated with high accuracy, and the radar jamming performance is improved. can do.

Further, since only the pulse necessary for the interference wave is stored, the storage efficiency of the DRFM 3 is improved, and the DRFM 3 can be used effectively. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

Third Embodiment FIG. 3 is a configuration diagram showing a DRFM jammer according to a third embodiment of the present invention.

Unlike the first and second embodiments, the DRFM interfering device 300 is characterized in that, before storing the pulse in the DRFM 3, the pulse is discriminated and unnecessary pulses are deleted.

The configuration is substantially the same as that of the DRFM interference apparatus 200 of the second embodiment, except that an RF delay circuit 10 and an RF switch 11 are provided between the receiver 2 and the DRFM 3.

Next, the operation of the DRFM jammer 300 will be described. The pulse (RF signal) received by the receiving antenna 1 is amplified and detected by the receiver 2. on the other hand,
The pulse received by the receiver 2 is subjected to measurement of predetermined pulse data (eg, pulse width) by the signal processor 7b and sent to the pulse discrimination circuit 8 as measurement data (pulse width data).

The pulse discrimination circuit 8 compares and compares the input measurement data with discrimination reference data (discrimination reference pulse width data) recorded in the discrimination reference data memory 9. Then, it discriminates whether the pulse is necessary or unnecessary for generating the interference wave.

When the pulse is determined to be necessary as a result of the discrimination, the pulse discrimination circuit 8 sends a storage valid signal to the DRFM control circuit 4. The DRFM control circuit 4 that has received the storage enable signal turns on the RF switch 11 and
The received pulse is stored in RFM3.

On the other hand, if it is determined that the pulse is unnecessary as a result of the discrimination, the pulse discrimination circuit 8 sends a storage invalidation signal to the DRFM control circuit 4. In this case, DR
The FM control circuit 4 turns off the RF switch and deletes the received pulse. Therefore, unnecessary pulses are not stored from the beginning.

Next, the DRF from the DRFM control circuit 4
The pulse stored in the DRFM 3 is reproduced based on the M control signal. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 as a disturbance pulse into space.

As described above, according to the DRFM interfering device 300, unnecessary pulses are deleted first and only the pulses necessary for the interfering wave are stored, so that no extra storage operation is required.
For this reason, the storage efficiency of DRFM3 is improved, and DRFM3
Can be used effectively. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

Fourth Embodiment FIG. 4 is a configuration diagram showing a DRFM jammer according to a fourth embodiment of the present invention.

If the target pulse can be uniquely fixed, a fixed BPF 12a may be inserted at the input end of the receiver 2 like the DRFM jammer 400.

The operation of the DRFM jammer 400 will be described. First, the pulse transmitted by the radar to be obstructed is received by the receiving antenna 1. Unwanted portions of the received pulses are deleted by the fixed BPF 12a. The pulse from which the unnecessary portion has been deleted is amplified by the receiver 2. Subsequently, the amplified pulse is stored in DRFM3. The operation of storing the pulse is controlled by the DRFM control circuit 4 based on a storage trigger from the receiver 2.

Next, at the time of radar interference, the pulse stored in the DRFM 3 is reproduced based on the DRFM control signal from the DRFM control circuit 4. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 as a disturbance pulse into space.

As described above, according to the DRFM interfering device 400, unnecessary pulses are first deleted and only the pulses necessary for the interfering wave are stored, so that no extra storage operation is required.
For this reason, the storage efficiency of DRFM3 is improved, and DRFM3
Can be used effectively. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted. Further, since a simple configuration is sufficient, the cost can be reduced.

(Fifth Embodiment) FIG. 5 is a configuration diagram showing a DRFM jammer according to a fifth embodiment of the present invention.

This DRFM jammer 500 is a fixed BPF 1 of the DRFM jammer 400 shown in the fourth embodiment.
This is a configuration using a variable BPF 12b instead of 2a.

The operation of the DRFM jammer 500 will be described. First, the pulse transmitted by the radar to be obstructed is received by the receiving antenna 1. Unwanted portions of the received pulse are deleted by the variable BPF 12b. The pulse to be deleted is set in advance in the variable BPF 12b. Subsequently, the pulse from which the unnecessary portion has been deleted is amplified by the receiver 2. Subsequently, the amplified pulse is D
Stored in RFM3. The operation of storing the pulse is controlled by the DRFM control circuit 4 based on a storage trigger from the receiver 2.

Next, at the time of radar interference, the pulse stored in the DRFM 3 is reproduced based on the DRFM control signal from the DRFM control circuit 4. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 as a disturbance pulse into space.

As described above, according to the DRFM jammer 500, since the variable BPF 12b is used, it is possible to easily follow a change in the frequency of the pulse and the like, and the radar jamming performance is improved. Further, unnecessary pulses are deleted at first, and only the pulses necessary for the interference wave are stored, so that no extra storage operation is required. Therefore, the storage efficiency of the DRFM3 is improved, and the DRFM3 can be used effectively. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted. Further, since a simple configuration is sufficient, the cost can be reduced.

(Embodiment 6) FIG. 6 is a configuration diagram showing a DRFM jammer according to Embodiment 6 of the present invention.

This DRFM jammer 600 is a fixed BPF 1 of the DRFM jammer 400 shown in the fourth embodiment.
This is a configuration using a fixed BPF bank 12c instead of 2a. The fixed BPF bank 12c has a configuration in which a plurality of BPFs having different settings are arranged in parallel, and can be arbitrarily selected from such BPFs.

The operation of the DRFM jammer 600 will be described. First, the pulse transmitted by the radar to be obstructed is received by the receiving antenna 1. Unwanted portions of the received pulse are deleted by the fixed BPF bank 12c. As the pulse to be deleted, an arbitrary BPF is selected and set in the fixed BPF 12c. Subsequently, the pulse from which the unnecessary portion has been deleted is amplified by the receiver 2. Subsequently, the amplified pulse is stored in DRFM3. The operation of storing the pulse is controlled by the DRFM control circuit 4 based on a storage trigger from the receiver 2.

Next, at the time of radar interference, the pulse stored in the DRFM 3 is reproduced based on the DRFM control signal from the DRFM control circuit 4. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 as a disturbance pulse into space.

As described above, according to the DRFM jammer 600, since the fixed BPF bank 12c is used, it is possible to easily follow a change in the frequency of the pulse, and the radar jamming performance is improved. Further, unnecessary pulses are deleted at first, and only the pulses necessary for the interference wave are stored, so that no extra storage operation is required. Therefore, the storage efficiency of the DRFM3 is improved, and the DRFM3 can be used effectively. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted. Further, since a simple configuration is sufficient, the cost can be reduced.

(Seventh Embodiment) FIG. 7 is a configuration diagram showing a DRFM jammer according to a seventh embodiment of the present invention.

The DRFM jamming device 700 has substantially the same configuration as the DRFM jamming device 200 of the second embodiment, except that a DRFM3a capable of storing a plurality of pulses is used instead of the DRFM3. Further, the DRFM control circuit 4 is also a DRFM control circuit 4a capable of controlling the DRFM 3a.

The operation of the DRFM interfering device 700 is substantially the same as the operation of the DRFM interfering device 200. The pulse (RF signal) received by the receiving antenna 1 is transmitted to the receiver 2
, And is stored in the DRFM 3a. This pulse storage operation is controlled by the DRFM control circuit 4a based on a storage trigger from the receiver 2.

Further, even when a pulse different from the received pulse is received, the pulse is stored in a memory space different from the stored pulse under the control of the DRFM control circuit 4a.

On the other hand, the pulse received by the receiver 2 is converted into predetermined pulse data (for example, pulse width) by the signal processor 7b.
Is measured and sent to the pulse discrimination circuit 8 as measurement data (pulse width data).

The pulse discrimination circuit 8 compares and compares the input measurement data with discrimination reference data (discrimination reference pulse width data) recorded in the discrimination reference data memory 9. Then, it discriminates whether the pulse is necessary or unnecessary for generating the interference wave. Such determination is made individually for each stored pulse.

As a result of the discrimination, when it is determined that the pulse is a necessary pulse, the pulse discrimination circuit 8 sends a storage valid signal to the DRFM control circuit 4a. The DRFM control circuit 4a that has received the storage enable signal holds the pulse stored in the DRFM 3a as it is.

As a result of the discrimination, when it is determined that the pulse is unnecessary, the pulse discrimination circuit 8 sends a storage invalidation signal to the DRFM control circuit 4a. In this case, DRFM
The control circuit 4 erases the pulse stored in the DRFM 3a.

Next, the DR from the DRFM control circuit 4a
Based on the FM control signal, a predetermined pulse is selected from the pulses stored in the DRFM 3a and reproduced. Subsequently, the reproduced pulse is amplified by the transmitter 5 and emitted from the transmitting antenna 6 into space as an interference pulse.

As described above, according to the DRFM jammer 700, since the DRFM 3a capable of storing a plurality of pulses is used, necessary pulses can be efficiently stored. Further, since only the pulse necessary for the interference wave is stored, the storage efficiency of the DRFM 3a is improved, and the DRFM 3a can be effectively used. Furthermore, since only the pulses necessary for the generation of interference are reproduced,
Does not emit unwanted interference.

Further, since various pulse data can be used, even if the use environment changes, the pulse can be divided with high accuracy, and the radar interference performance can be improved.

(Eighth Embodiment) FIG. 8 is a configuration diagram showing a DRFM jammer according to an eighth embodiment of the present invention.

The DRFM interfering device 800 has a pulse discrimination method of the DRFM interfering device 2 described in the second embodiment.
Same as 00, but different in configuration. That is, the DRFM jammer 800 is characterized in that a reception antenna 1b and a receiver 2b are newly added, and pulse discrimination means is provided in a different system.

As described above, according to the DRFM jammer 800, the pulse discriminating function is made independent, so that the receiving antenna 1b
, And the reception bandwidth of the receiver 2b can be easily designed to be suitable for pulse discrimination. Further, since only the pulse necessary for the interference wave is stored, the storage efficiency of the DRFM3 is improved, and the DRFM3 can be effectively used. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

Further, since various pulse specifications can be used, even when the use environment changes, the pulses can be divided with high accuracy, and the radar interference performance can be improved.

[0087]

As described above, according to the radar jamming apparatus of the present invention, only necessary pulses for generating jamming waves are recorded by separating necessary and unnecessary pulses which are mixed. . Therefore, the storage capacity of the pulse is small. Further, since only pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted. Furthermore, since the incoming pulse discriminating means for separately dividing the incoming pulse into a pulse necessary for generating the interfering wave and a pulse unnecessary for generating the interfering wave is provided independently, it is possible to easily design the gain of the receiving apparatus. I can do it.

According to the radar interfering device of the next invention, the arrival pulse is divided into a necessary pulse and an unnecessary pulse based on the specification of the arrival pulse, and it is determined whether or not the storage of the arrival pulse is necessary. . For this reason, incoming pulses can be separated with high accuracy according to the use environment and the like, and the radar interference performance is improved.

According to the radar interfering device of the next invention, as specific examples of the above-mentioned arriving pulse, frequency, pulse width, pulse repetition frequency, scan period, polarization,
Or he mentioned the direction of arrival of radio waves. By using such various specifications, an incoming pulse can be separated with high accuracy even when the use environment changes. For this reason, the radar interference performance can be improved.

According to the radar interfering device of the next invention, the above-mentioned plurality of arriving pulse data are further combined,
Correlation processing was performed. For this reason, with higher accuracy,
The arriving pulse can be divided into a necessary pulse and an unnecessary pulse.

According to the radar interfering device of the next invention, a necessary arriving pulse and an unnecessary arriving pulse are determined based on the specifications of the arriving pulse and the reference data, and the determined pulse is stored in the arriving pulse storage means. Erase it. For this reason, the storage efficiency of the incoming pulse is improved. Furthermore, since only the pulses necessary to generate the interference wave are reproduced,
Does not emit unwanted interference.

According to the radar interfering device of the next invention, a necessary arriving pulse and an unnecessary arriving pulse are determined based on the specifications of the arriving pulse and the reference data, and only the arriving pulse determined as unnecessary is stored in the arriving pulse storage means. I tried to remember. For this reason, the operation of storing and erasing unnecessary incoming pulses can be omitted. Further, since only the necessary arriving pulse is stored, the storage efficiency of the arriving pulse is improved. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

According to the radar interfering device of the next invention, since the frequency is used as the data of the arriving pulse, the storage efficiency of the arriving pulse storage means is improved, and the arriving pulse storage means can be effectively utilized. Further, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

According to the radar interfering device of the next invention, R
Before the arrival pulse is received, the arrival pulse determined to be unnecessary is deleted using the F delay circuit and the RF switch, so that an unnecessary storage operation can be omitted, and the storage efficiency of the arrival pulse storage means is improved. Therefore, the incoming pulse storage means can be effectively used. Also, since only the pulses necessary for generating the interference wave are reproduced, unnecessary interference waves are not emitted.

According to the radar interfering device of the next invention, a pulse storage space capable of storing a plurality of pulses is provided in the incoming pulse storage means, and the pulse storage space is controlled by the pulse storage space control means. Incoming pulses can be handled, and necessary incoming pulses can be efficiently stored.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a DRFM jammer according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a DRFM jammer according to a second embodiment of the present invention;

FIG. 3 is a block diagram showing a configuration of a DRFM jammer according to a third embodiment of the present invention;

FIG. 4 is a block diagram illustrating a configuration of a DRFM jammer according to a fourth embodiment of the present invention;

FIG. 5 is a block diagram illustrating a configuration of a DRFM jammer according to a fifth embodiment of the present invention;

FIG. 6 is a block diagram illustrating a configuration of a DRFM jammer according to a sixth embodiment of the present invention;

FIG. 7 is a block diagram illustrating a configuration of a DRFM jammer according to a seventh embodiment of the present invention;

FIG. 8 is a block diagram showing a configuration of a DRFM jammer according to an eighth embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a conventional DRFM jammer.

[Explanation of symbols]

100 DRFM jammer, 1 receiving antenna, 2 receiver, 3 DRFM 4DRFM control circuit, 5 transmitter,
6 transmitting antenna, 7a frequency discriminator, 8 pulse discriminating circuit, 200 DRFM jammer, 7b signal processor, 3
00 DRFM jammer, 10 RF delay circuit, 11
RF switch, 400 DRFM jammer, 12a Fixed BPF, 500 DRFM jammer, 12b Variable B
PF, 600 DRFM jammer, 12c fixed BPF
Bank, 700 DRFM jammer, 3a DRFM,
4a DRFM control circuit, 800 DRFM jammer,
1a, 1b receiving antenna, 2a, 2b receiver.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01S ⁷ /00-7/42 G01S 13/00-13/95

Claims (9)

(57) [Claims] 1. An incoming pulse discriminating means for dividing an incoming pulse into a pulse necessary for generating an interfering wave and a pulse unnecessary for generating an interfering wave and storing only a pulse necessary for generating the interfering wave, A radar interfering device for emitting an interfering wave by reproducing the stored pulse, wherein the incoming pulse discriminating means is provided independently of an incoming pulse receiving system. 2. The incoming pulse discriminating means, an incoming pulse measuring means for measuring an incoming pulse based on the data of the incoming pulse, and a storage of the incoming pulse by comparing the measured incoming pulse with reference data. Storage necessity determination means for determining the necessity of the above. The arrival pulse measurement means and the storage necessity determination means determine the arrival pulse as a pulse necessary for generation of an interference wave and generation of an interference wave. The radar jammer according to claim 1, wherein the radar jammers are divided into unnecessary pulses. 3. The radar jammer according to claim 2, wherein the data of the incoming pulse is a frequency, a pulse width, a pulse repetition frequency, a scan period, a polarization, or a radio wave arrival direction. 4. The radar interfering apparatus according to claim 2, wherein the incoming pulse discriminating means performs correlation processing by combining a plurality of specifications of the incoming pulse. 5. The incoming pulse discriminating means, an incoming pulse storing means for storing the incoming pulse, an incoming pulse measuring means for measuring an incoming pulse based on the specifications of the incoming pulse, and A storage necessity determining unit that determines whether the storage of the arriving pulse is necessary by comparing with the reference data, and an arriving pulse erasing unit that erases the arriving pulse that the storage necessity determining unit determines as unnecessary. The radar interference apparatus according to any one of claims 1 to 4, wherein the incoming pulse is divided into a pulse necessary for generating an interference wave and a pulse unnecessary for generating an interference wave. 6. The incoming pulse discriminating means, an incoming pulse measuring means for measuring an incoming pulse based on the data of the incoming pulse, and comparing the measured incoming pulse with reference pulse data to determine the incoming pulse. Storage necessity determination means for determining the necessity of storage; and arrival pulse storage means for storing only the arrival pulse determined to be necessary by the storage necessity determination means. The radar jammer according to any one of claims 1 to 4, wherein the radar jammer is divided into a pulse necessary for generation of a wave and a pulse unnecessary for generation of a jamming wave. 7. The incoming pulse discriminating means, an incoming pulse storing means for storing an incoming pulse, a frequency discriminating means for discriminating the frequency of the incoming pulse, and comparing the discriminated incoming pulse with discrimination reference data. Storage necessity determination means for determining the necessity of storage of the arrival pulse, and arrival pulse erasure means for erasing the arrival pulse that the storage necessity determination means has determined to be unnecessary, comprising: The radar jammer according to claim 1 or 2, wherein the radar jammer is divided into a pulse necessary for generating an interference wave and a pulse unnecessary for generating an interference wave. 8. An incoming pulse discriminating means, an incoming pulse measuring means for measuring an incoming pulse based on the data of the incoming pulse, and storing the incoming pulse by comparing the measured incoming pulse with reference pulse data. Storage necessity determining means for judging the necessity of the arriving pulse; arriving pulse deleting means for deleting the arriving pulse which the storage necessity necessity determining means determines as unnecessary by an RF delay circuit and an RF switch; Arriving pulse storage means for storing only the arriving pulse determined as, and arranging the arriving pulse into a pulse necessary for generating an interfering wave and a pulse unnecessary for generating an interfering wave. The radar jammer according to claim 1 or 2, wherein: 9. The incoming pulse discriminating means comprises a pulse storage space means capable of storing a plurality of pulses, and a pulse storage space control means for controlling the pulse storage space. 8. The radar jammer according to 7.