KR20030054594A - Signal generator for jamming - Google Patents

Abstract

PURPOSE: A jamming signal generator is provided to configure a hardware circuit for detecting continuous waves and controlling jamming signals in a controller of the jamming signal generator, so as to decide and remove continuous waves in a system. CONSTITUTION: A direction finder(21) receives RF(Radio Frequency) signals received from an external. A receiving unit(23) comprises a reception analyzer for analyzing the RF signals received from the direction finder(21), and a jamming channelization receiver for jamming RF signals at a specific frequency band. A controlling unit(25) comprises a system controller for applying a channel selection signal to the jamming channelization receiver, and a jamming controller for jamming RF signals. A noise jamming unit(27) receives a DT0 control signal from the controlling unit(25) for noise jamming. A DRFM(Digital RF Memory)(28) receives the RF signals and a DRFM control signal from the controlling unit(25), to perform modulation to digital high frequencies. And a continuous wave jamming unit(29) receives control signals from the controlling unit(25) and the high frequency signals from the direction finder(21), for jamming continuous waves.

Description

Jamming Signal Generator {SIGNAL GENERATOR FOR JAMMING}

The present invention relates to a signal generator, and more particularly, to a jamming signal generator capable of removing a continuous wave and rapidly generating a jamming signal when a continuous wave is applied to the same frequency band during signal jamming.

In a general wireless communication system, an arbitrary transmitting station and a receiving station wirelessly transmit and receive data within a frequency band promised to each other. Such a wireless communication system is continuously fixed through an arbitrary frequency band according to its communication method. When occupying a band and performing communication (frequency division multiple access method; 14 FDMA), and when communicating with different occupancy time for a frequency band (time division multiple access method; TDMA), It can be divided into a case of communicating and a case of communicating through a spreader with different codes (code division multiple access method (CDMA)).

In particular, in the case of electronic warfare, a jamming system is used to prevent communication of data when a wireless communication system using any modulation and demodulation method or a spreader is transmitting and receiving data.

The jamming system is classified into broad band jamming, partial band jamming, tone jamming, pulse jamming, multiple tone jamming, and the like, and has a strong noise set in advance according to the type of jamming. By sending out a frequency with components, it prevents the receiver from properly restoring data.

In particular, the broadband jamming is a method of applying strong noise to all bands used by the transceiver. As the bandwidth used by the transceiver is wider, the performance of the jamming decreases, and the maximum output of the noise is determined according to the jamming.

The partial band jamming is designed to compensate for the performance of wideband jamming. The partial band jamming is a method in which noise is transmitted by determining a constant width of a band in a band where a large amount of data is transmitted and received.

1 is a jamming signal generator according to the prior art.

As shown in FIG. 1, a direction detecting apparatus 1 and an omnidirectional receiving apparatus 5 for receiving a radio frequency (RF) high frequency signal and analyzing various information included in the signal, and the direction detecting apparatus 1 And a signal processing device 3 for receiving signal received from the omnidirectional receiving device 5 and performing signal processing, and a radar analysis device for analyzing data received from the signal processing device 3 ( 7), a controller 9 for signal control by receiving an emitter (AET) information signal generated from the radar analyzer 7 and a jamming signal management device 11 for managing the jamming signal to be generated; A jamming signal generator 13 for generating a jamming signal by using a control signal generated by the jamming signal management device and an RF high frequency signal.

The jamming signal device having the above configuration analyzes the high frequency signal of a specific band received from the outside from the direction detecting device 1 and the omnidirectional receiving device 5. The amplitude and phase data of the high frequency signal analyzed by the direction detecting device 1 is applied to the signal processing device 3. At the same time, the high frequency signal received by the omnidirectional receiving device 5 is applied to the signal processing device 3 to detect the pulse by comparing the analyzed signal and the high frequency signal with a reference threshold signal value. The reference threshold signal value is applied at the radar analysis device 7. The pulse is detected after comparison with the reference threshold value, and if the pulse width is 102.4 kHz or more, it is determined as a continuous wave and a continuous wave flag is generated and applied to the radar analyzer 7.

When the continuous wave is detected by the signal processing device 3, the continuous wave is periodically sensed while increasing the reception threshold level by about 6 dB in the continuous wave existing frequency band. If the continuous wave is removed, the reception threshold level is normally set, and if found again, the reception threshold level is continuously increased.

In addition, when the continuous wave is detected, the radar analyzing apparatus 7 applies an emitter information signal to the controller 9 and the jamming signal managing apparatus 11, and the jamming signal managing apparatus 11 senses the same. The continuous wave is removed using the BRF while transmitting the frequency band of the sustained wave to the jamming signal generator 13. Then, when a new continuous wave is found, the reception wave of the DCA is set to 6 Hz to remove the continuous wave.

Accordingly, the jamming signal generator may simultaneously perform reception sensitivity control of a receiver detecting a high frequency signal and remove a continuous wave detected at a received high frequency.

However, in the conventional jamming signal generator having the above configuration, when a continuous wave is input to the same frequency band while generating a jamming signal in a specific frequency band, the receiver analyzes the signal while changing the frequency band. In the jamming signal generator, a problem occurs in that the jamming signal cannot be generated.

In addition, there is a jammer generator and a full-band receiver has a heavy weight, bulky disadvantages.

In order to solve the above-mentioned problems of the prior art, a jamming system capable of determining and removing a continuous wave in a system by configuring a hardware circuit for detecting a continuous wave and controlling a jamming signal in a control unit of a jamming signal generator. Its purpose is to provide a signal generator.

1 is a jamming signal generator according to the prior art.

2 is a block diagram showing the configuration of a jamming signal generator according to the present invention;

3 is a diagram illustrating a continuous wave removing circuit mounted in a control unit of a jamming signal generator according to the present invention;

4 shows a signal waveform according to the invention.

* Description of the symbols for the main parts of the drawings *

21: direction detector 23: receiver

25 control unit 27 first jamming machine

28: DRFM29: Second Jammer

31: second D / A converter 32: A / D converter

33: First D / A Converter 35: Pulse Detection Circuit

38: counter circuit 41: continuous wave determination circuit

In order to achieve the above object, a jamming signal generator according to the present invention,

Direction detector for receiving a high frequency signal applied from the outside;

A receiver configured to receive a high frequency signal received by the direction detector and a jamming channelization receiver for jamming a high frequency signal of a specific frequency band;

A controller configured to apply a channel selection signal to the jamming channelization receiver, and a jamming controller configured to control jamming of a high frequency signal;

A noise jammer receiving a DTO control signal from the controller to perform noise jamming;

A DRFM configured to receive a high frequency signal and a DRFM control signal from the controller and modulate the digital high frequency signal; And

And a continuous wave jammer receiving a control signal from the controller and a high frequency signal from the direction detector to jam the continuous wave.

The control unit may include: a reception pulse detection threshold latch circuit configured to generate a reception pulse detection threshold value according to a video signal input to the jamming channelization receiver and a data signal input from a system controller disposed in the control unit;

A first comparator for comparing a threshold value generated in the received pulse detection threshold latch circuit with a video signal input from the jamming channelization receiver;

A continuous wave elimination threshold latch circuit for generating a continuous wave elimination threshold value;

A second comparator for comparing a threshold value generated in the sustain wave cancellation threshold latch circuit with a video signal input from the jamming channelization receiver;

A pulse detection circuit configured to receive signals from the first and second comparators and generate a final pulse signal;

A signal adjusting unit which receives a signal generated by the first comparator and adjusts a threshold value for removing the continuous wave; And

And a continuous wave state latch circuit configured to latch the continuous wave state by a video signal input from the jamming channelization receiver, a continuous wave determination signal generated by the signal controller, and a continuous wave state confirmation signal applied from the system controller. It is characterized by.

The signal controller may include: a counter circuit configured to count a pulse width by receiving a signal generated from the first comparator;

A continuous wave determination pulse latch circuit configured to generate a continuous wave determination pulse signal by receiving a counting signal of the counter circuit and an enable signal generated by the system controller;

A third comparator for comparing a counting signal generated in the counter circuit and a pulse signal generated in the continuous wave determination pulse latch circuit; And

And a continuous wave determination circuit for generating a continuous wave determination signal according to the signal compared in the third comparator.

Advantageous Effects of Invention According to the present invention, a continuous wave elimination circuit is disposed in a control unit mounted in a jamming signal generation system to remove a continuous wave and generate a jamming signal even when a continuous wave is found in the same frequency band while generating a jamming signal. There is this.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing a configuration of a jamming signal generator according to the present invention.

As shown in FIG. 2, a direction detector 21 for detecting an RF high frequency signal applied from the outside, a receiver 23 for applying a high frequency signal received from the direction detector 21, and the receiver 23 A first jamming signal receiving a signal analysis control signal, a channel selection signal, and a jamming control signal of the high frequency signal received from the first and second signal jamming by receiving the control signal generated from the controller 25. Group 27, a second jammer 27, and a DRFM 28. As shown in FIG.

The jamming signal generation system having the above configuration controls the high frequency signal received by the direction detector 21 in the receiver 23, and the signal received by the direction detector 21 is analyzed by the receiver 23. And an emitter information signal is applied to the control unit 25. At this time, the control unit 25 continuously transmits the frequency band of the threat identification variable signal to the receiving unit 23, and the receiving unit 23 fluidly analyzes the high frequency signal according to the threat identification variable signal of the control unit 25. This is done.

Using the emitter information signal received from the receiver 23, the controller 25 selects a filter switch of the corresponding frequency band from the receiver 23 to instruct the controller 25 to jam the threat signal. In this case, when the continuous wave is input in the same frequency band while jamming the threat signal in the form of a pulse, the continuous wave removing circuit configured in the controller 25 removes the continuous wave to generate a jamming signal. Do it.

Accordingly, the jamming signal is generated by the second jammer 27 using the continuous wave jamming control signal generated by the controller 25 and the high frequency signal applied by the direction detector 21. In addition, the control unit 25 applies a high frequency signal and a DRFM 28 control signal to the DRFM 28 to apply a high frequency signal to the first jammer 27, and the control unit 25 receives the first signal. The DTO control signal is applied to the jammer 27 to generate a jamming signal.

3 is a diagram illustrating a continuous wave removing circuit intercepted by a control unit of a jamming signal generator according to the present invention.

As shown in FIG. 3, when a signal is applied to the reception pulse detection threshold latch circuit 36 from the system controller disposed in the control unit through the decoder 44, the reception pulse detection threshold latch circuit 36 receives the reception pulse. The detection threshold value is applied to the first D / A converter 33. The received pulse detection threshold value converted in the first D / A converter 33 is applied to the pulse detection circuit 35 through the second comparator 34b.

In addition, the received pulse detection threshold value that has passed through the second comparator 34b is input as an enable signal of the counter circuit 38 and based on the counting count of the count circuit 38 and the data applied from the controller. Continuous Wave Determination That Generates a Pulse The pulse output from the pulse latch circuit 39 is compared by the third comparator 40, and when the number of counts is greater than or equal to a certain number, the continuous determination circuit 41 determines that the continuous wave is continuously input. . When the sustain determination circuit 41 determines that the continuous wave is input and applies a signal to the pulse detection circuit, the second comparator 34b among the signals input from the first comparator 34a and the second comparator 34b. Select the signal input from and output the final output pulse.

Then, the sustain wave determination is made by the sustain determination circuit 41, and the sustain wave determination signal is input as an enable signal of the sustain wave rejection threshold latch circuit 37, which is sustained by the sustain wave rejection threshold latch circuit 37. The continuous wave rejection threshold value of which 6 kHz is increased to the pulse intensity generated by the PA 43 is applied from the adder 42 and applied to the second D / A converter 31. The second D / A converter 31 is applied to the pulse detection circuit 35 by comparing the signal received at the jamming channelization receiver disposed in the receiver with the first comparator 34a.

46 shows an amplifier, 32 is an A / D converter, 47 is an oscilloscope, and 45 is a continuous wave state latch circuit for checking the continuous wave state.

4 illustrates a signal waveform according to the present invention.

As shown in Fig. 4, when the video signal a of the high frequency signal input from the jamming channelization receiver is continuously applied, the reception pulse detection threshold latch circuit generates the signal by the reception pulse detection threshold pulse (dotted line display). The pulse signal b is detected in the video signal a. The signal e generated by the continuous wave determination circuit is applied as an enable signal of the continuous wave control threshold latch circuit to generate a threshold pulse f for removing the continuous wave.

In addition, the sustain wave flag (c) signal compared in the third comparator is applied to the sustain wave state latch circuit to continuously confirm the state of the sustain wave. A signal e for determining the persistence of the continuous wave is compared with the number counted in the continuous wave determination pulse latch circuit and the counter circuit and applied to the continuous wave determination circuit.

The threshold pulse signal f for the continuous wave cancellation is applied to the pulse detection circuit through the second D / A converter to detect a pulse signal in the video signal (g).

Thus, the signals detected by the pulse detection circuit combine and output the detected pulse signals (h).

As described in detail above, the present invention attaches a circuit capable of removing the continuous wave inside the control unit of the jamming signal generation system, and removes the continuous wave even when another continuous wave is input while the continuous wave is removed. Has the effect of outputting

In addition, the signal processing is faster, smaller in volume, and lighter in weight than the conventional jamming signal generation system.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

Claims (3)

Direction detector for receiving a high frequency signal applied from the outside; A receiver configured to receive a high frequency signal received by the direction detector and a jamming channelization receiver for jamming a high frequency signal of a specific frequency band; A controller configured to apply a channel selection signal to the jamming channelization receiver, and a jamming controller configured to control jamming of a high frequency signal; A noise jammer receiving a DTO control signal from the controller to perform noise jamming; A DRFM configured to receive a high frequency signal and a DRFM control signal from the controller and modulate the digital high frequency signal; And A jamming signal generator comprising a continuous wave jammer receiving a control signal from the controller and a high frequency signal from the direction detector and jamming the continuous wave; The method of claim 1, The control unit may include: a reception pulse detection threshold latch circuit configured to generate a reception pulse detection threshold value according to a video signal input to the jamming channelization receiver and a data signal input from a system controller disposed in the control unit; A first comparator for comparing a threshold value generated in the received pulse detection threshold latch circuit with a video signal input from the jamming channelization receiver; A continuous wave elimination threshold latch circuit for generating a continuous wave elimination threshold value; A second comparator for comparing a threshold value generated in the sustain wave cancellation threshold latch circuit with a video signal input from the jamming channelization receiver; A pulse detection circuit configured to receive signals from the first and second comparators and generate a final pulse signal; A signal adjusting unit which receives a signal generated by the first comparator and adjusts a threshold value for removing the continuous wave; And And a continuous wave state latch circuit configured to latch the continuous wave state by a video signal input from the jamming channelization receiver, a continuous wave determination signal generated by the signal controller, and a continuous wave state confirmation signal applied from the system controller. Jamming signal generator, characterized in that The method of claim 1, The signal controller may include a counter circuit for counting a pulse width by receiving a signal generated from the first comparator; A continuous wave determination pulse latch circuit configured to generate a continuous wave determination pulse signal by receiving a counting signal of the counter circuit and an enable signal generated by the system controller; A third comparator for comparing a counting signal generated in the counter circuit and a pulse signal generated in the continuous wave determination pulse latch circuit; A jamming signal generator comprising a continuous wave determination circuit for generating a continuous wave determination signal according to the signal compared in said third comparator