KR101918576B1 - Method for operating an electronic reconnaissance system in surroundings that are protected by a jammer - Google Patents

Abstract

The present invention relates to a driving method of an electronic reconnaissance system in an environment protected by an electromagnetic disturbing device (1). (T _J2 ) for transmitting a radio wave disturbing signal during the driving of the reactive-type electromagnetic disturbing device (1) and monitoring steps (T _B ) for receiving and analyzing the signals to be disturbed are alternately performed, The reception of the system 2 is performed only during the monitoring steps T _B of the responsive electromagnetic disturber 1. [

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic reconnaissance system and an electronic reconnaissance system,

The present invention relates to a driving method and a reconnaissance system of an electronic reconnaissance system.

A mobile electronic jammer is used to protect vehicles or vehicle convoys from remote controlled explosive devices (so-called Remote Controlled Improvised Explosive Devices (RCIEDs)). Militaryly, in addition to driving an electromagnetic disturbance, parallel operations of an electronic reconnaissance system (also called Electronic Support Measures (ESM) system) are required in many operations. In general, such a reconnaissance system includes a configuration for recognizing the type of modulation, a configuration for searching for directions, and a configuration for demodulation and analysis of signal contents, for example, according to operational conditions .

The HF jamming energy transmitted in an electromagnetic disturbance for the protection of a vehicle or a convoy may cause it to overdrive or saturate the receiver channels of the reconnaissance system and render it unusable. Therefore, it must be turned off for the reconnaissance mode of the electromagnetic disturbance, and therefore for the most persistent desired protection function.

So-called reactive-type jammers (responsive jammers) are disclosed in DE 10 2009 006 861 A1 and US 2005/0041728 A1. These are electromagnetic disturbance devices which perform radio interference only when a signal to be blocked is detected. To detect these signals, responsive electron disturbers operate with an observation phase disposed between each two jamming phases. During this observation phase, only the signal environment is observed and evaluated, but no radio interference signal is transmitted. HF energy is positively transmitted at the frequencies in use only at the subsequent radio interference stage. The observation stage of such an electromagnetic disturbance is so short that targets (e.g., bombs) may not work at this point.

Similarly, US 2006/0153280 A1 discloses a reactive electron disturber whose electron scrambler can additionally determine the direction of the received signal during the observation step. This direction can be considered in the subsequent wave interference step, and in particular, the wave interference signal can be radiated only in the corresponding direction.

It is an object of the present invention to enable electronic radio reconnaissance of varying quality / depth (depth), while at the same time maintaining the protection from RCIEDs by the required responsive electromagnetic disturbance, And to provide a method that can be driven in parallel.

The above-mentioned object can be achieved by the method claimed in claim 1. The reconnaissance system used in the preferred embodiments and the method according to the invention can be achieved by the following claims.

In the reconnaissance mode, at least one of the following functions is performed.

Direction search,

Modulation type recognition,

Demodulation,

Signal content analysis.

In certain preferred embodiments, the response of the reconnaissance system to the radio disturbance cycle of the reactive electron disturber is possible. In particular, dynamic adaptation of the system synchronization can take place and in fact the lengths of the observation and / or propagation disturbance steps of the reactive electron disturbance can be adjusted according to the operating requirements of the reconnaissance system (operational requirements) . Therefore, both the radio wave interference efficiency and the reconnaissance depth (distance) can be adjusted in a required manner.

For example, for more sophisticated functions of the reconnaissance system, the reconnaissance system can be configured to suitably extend the observation phase of the electromagnetic disturbance, or appropriately shorten the wave disturbance phase, for example for analysis of signal content, A longer signal acquisition time or a gap between two or more shorter signal records.

Particularly preferably, the bearing information obtained by the reconnaissance system can be used for direction selective propagation disturbance to the multi-antenna system. The generation of such a directional signal can be achieved by appropriate beam shaping with phase-controlled group antennas, or by antenna switching in the case of a plurality of directional antennas .

As long as the reaction type electron disturbance system and the reconnaissance system are not generally driven and driven, in one embodiment, as soon as the above-mentioned two units are in operative contact with each other, the reconnaissance system detects the time point of the observation step set in the reactive electron disturbance (time position).

The reactive electron disturber and reconnaissance system can be used to protect particularly vehicles or vehicle convoys.

Therefore, the reconnaissance system and the responsive electromagnetic disturber may be located in the same vehicle or in different vehicles depending on the application operating conditions (application requirements).

According to the present invention, the operation of the reaction type electron disturber and the reconnaissance system are synchronized so that signal reception of the reconnaissance system can occur only within observation steps of the reactive electron disturber. This ensures that the reconnaissance system is not disturbed by the radiation of the electromagnetic disturbance. Thus, a high quality reconnaissance operation is possible with protection from RCIEDs (performed by the electromagnetic disturbance) achieved.

The present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings,
Figure 1 schematically shows the synchronization of the operation of a reactive jammer with a reconnaissance system,
Fig. 2 schematically shows the overall configuration of a reaction type electron diffuser and a reconnaissance system,
Fig. 3 shows a circuit diagram showing the detailed configuration of the protection circuit according to Fig.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates the temporal processing of the respective stages of the method of the reactive electron diffuser and the reconnaissance system. In the present embodiment, only the " direction finding " function is considered for the reconnaissance system. As described above, more functions, for example, modulation type recognition, etc., can be provided in the reconnaissance system. The order of internal processing of the electron diffuser is shown in the upper part of Fig. 1, and the order of internal processing of the direction searcher is shown in the lower part of Fig.

The treatment of the electron diffuser is as follows.

Time interval T _J2 : Transmits radio interference signal with frequency f_alt

Time interval T _LT : Acquire signal to identify possible threats

Time domain T _J1 : Fast Fourier transform or FFT of the received signal during T _LT to obtain spectral information and determine the new interference disturbance frequency f_neu required therefrom. Finally, a new jamming signal with frequency f_neu is determined.

Time interval T _J2 : Transmit a new jamming signal with frequency f_neu. Finally, the signal acquisition reoccurs within T _LT , and the cycle described above begins from the beginning.

The time intervals T and T _{LT J1} is formed with the observation phase (T _B), and the observation phase (T _B) is located between the two radio waves interfere with step (T _J2).

The observation step T _B can be adjusted by extending T _LT so as to increase the depth of the reconnaissance depending on the respective current operating conditions (operational requirements).

Alternatively, to increase the depth (distance) of the scout in accordance with the respective current operating conditions (operational requirements s), of the successive observation phase (T _B), the interference phase cycle time between (T _J2) And / or by omitting the time interval T _J1 .

If high jamming efficiency is required due to applicable operating conditions (applied operational requirements), the jamming phase (T _J2 ) can be extended. Alternatively or additionally, the viewing step T _B can be reduced and thus the time T _LT and the radio disturbing step T _J2 can be extended. The radio interference signal can be radiated also in the time interval T _J1 .

Generally, the radio wave interference efficiency (cm < 3 > _J ) of the electron disturbance is as follows.

Here, the processing of the reconnaissance system exemplarily used as the direction searcher is as follows. The following processing steps occur in parallel with the operation of the electron diffuser.

Bearing calculation,

Signal acquisition,

Spectrum analysis by FFT,

Bearing calculation,

Subsequent iteration of these cycles.

According to the present invention, the operation of the reconnaissance system and the reactive electron disturber is synchronized so that the signal acquisition of the direction finder can occur only during the observation period (T _B ) of the reactive electron disturbance, The disturbance may not occur during the radio disturbing phase (T _J2 ) transmitting the radio disturbance energy. For example, the synchronization may occur via a synchronization line (e.g., copper or fiberglass) or through an air interface. The air interface has the advantage that a plurality of vehicles can operate in parallel.

In addition, the duration of each of the operation steps of the reactive electron disturber and the reconnaissance system can be freely selected. For example, there is no need for the signal acquisitions of the electron diffuser and the direction finder to start or end at the same point in time (as shown in the example of Fig. 1).

Fig. 2 schematically shows the overall configuration of the reaction type electron disturber 1 and the reconnaissance system 2. As shown in Fig. The electromagnetic disturbing device 1 includes a radio wave interference module (ECM) and an associated antenna (A-ECM) for transmitting and receiving radio wave interference signals. Reconnaissance system 2 includes a reconnaissance module (ESM) and an associated antenna (A-ESM) for receiving signals. The two systems 1, 2 are synchronized with respect to signal acquisition of the reconnaissance system 2, as described above. The synchronization may be performed through a cable connection as shown. This may be preferred if two systems 1, 2 are located in the same vehicle. Alternatively, a wireless connection may also be provided, especially if the two systems 1, 2 are located in different vehicles or platforms.

To protect the receiver in the reconnaissance module (ESM) during transmission of the radio disturbing signal by the electromagnetic disturbing device 1, an antenna protecting member P shown in detail in Fig. 3 is provided.

Fig. 3 shows in detail the design of the antenna protection member P of Fig. In particular, it has features of fast open / closed switching operation and reliable separation in the open state.

As shown in Figure 3, a plurality of protection arrangements are connected to the output line of the antenna (A-ESM) of the reconnaissance system. They differ depending on the maximum energy until the response characteristics differ in speed and they provide effective protection.

The basic protection device GS has to destroy a significant part of the incoming energy, for example a gas spark gap. The residual voltage is supplied to a high speed switch (SSC) (e.g., a relay, PIN-diode or MEMS switch), which disconnects the antenna. The limiter LT is composed, for example, of diodes, and is provided to further increase the protection effect in one embodiment.

Depending on the application, or depending on the strength of the expected field, these three configurations, two of these configurations, or only one of these configurations may be used.

Claims (6)

A method of driving an electronic reconnaissance system (2) in an environment protected by a reactive electron disturber (1)
When the reactive-type electromagnetic disturbing device (1) is driven, radio wave interference steps (T _J2 ) for transmitting a radio wave interference signal and observation steps (T _B ) for receiving and evaluating signals to be radio- Cycle is performed,
Characterized in that the signal acquisition of said electronic scouting system (2) occurs only during said observation steps (T _B ) of said reactive electron disturber (1), and wherein said radio disturbing cycle of said reactive electron disturber Said electronic reconnaissance system (2) responding, said electronic reconnaissance system (2)
Direction finding,
Modulation type recognition,
Demodulation, and
Analyzing the signal content
Wherein the control unit performs at least one of the functions of the electronic reconnaissance system. The method according to claim 1, wherein the duration of the observation steps (T _B ) and / or the wave disturbing steps of the reactive electron disturbance (1) is determined by the operational requirements of the reconnaissance system (2) Wherein the electronic scouting system is adaptively changed to the electronic scouting system. 3. The method according to claim 1 or 2, wherein the reconnaissance information obtained by the reconnaissance system (2) is considered in the radio wave disturbance by the reactive electron disturber (1). The reconnaissance system according to claim 1 or 2, wherein the reconnaissance system (2) comprises a time position of the observation step (T _B ) set in the reactive electron disturber (1) as soon as the two above- And automatically synchronizes with the electronic reconnaissance system. A reconnaissance system (2) for parallel operation with a reactive electron disturber (1) in a driving method of an electronic reconnaissance system according to claim 1 or 2,
(T _J2 ) for transmitting a radio wave interference signal by driving the reaction type electromagnetic disturbing device (1) and observation steps (T _B ) for receiving and evaluating signals to be disturbed are alternately performed,
The reconnaissance system 2 includes an antenna protection switch for protecting the reconnaissance system 2 from jamming radiation of the reactive electron disturber 1 during the radio interference stages T _J2 Wherein the reconnaissance system comprises: 6. The reconnaissance system according to claim 5, wherein the antenna protection switch comprises a series connection of a basic protection device, a high speed switch and a limiter.

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