RU2766325C1 - Device for generating a radio interference signal for blocking mobile communication subscriber terminals and wireless radio access systems - Google Patents

Abstract

FIELD: radio engineering.

SUBSTANCE: invention can be used to create artificial interference. In a device for generating a radio interference signal for blocking mobile communication subscriber terminals and wireless radio access systems each linearly varying voltage generator (LVVG), being connected to a common LVVG, generates harmonic oscillations synchronized in time with oscillations generated by the rest of the LVVGs, and differing in frequency from oscillations generated by other LVVGs, as a result of which there is an increase in the time effect of the generated interference on the useful signal by a factor of n2, where n is the number of LVVGs used to generate interference, the power spectral density of the interference signal increases by a factor of n at constant power of the transmitting elements, and the power of the interference signal decreases.

EFFECT: increased probability of guaranteed radio suppression without increase of interference signal power.

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Description

The technical solution relates to the field of radio engineering, namely to a device for creating artificial interference.

A device for blocking unauthorized devices is known from the prior art, comprising a non-linearly varying voltage driver, a voltage-controlled generator, a band-pass filter, a power amplifier and an antenna. An inverter, a comparator, a pulse counter, an on/off switch and a switch control device are also introduced into the device, the first signal input of the on/off switch is connected to the output of a voltage controlled oscillator, the second signal input of the on/off switch is connected to the output of the inverter, and the output of the on/off switch is connected to the input of the band pass filter. , the output of which is connected to the input of the power amplifier, the output of which is connected to the input of the transmitting antenna, while the switch is controlled by the control device, and the division factor of the counter lies in the range of integers from 4 to 32. RF patent No. 2720698, IPC: F41H 11/12; H04K 3/00; H04B 7/00, published 05/12/2020.

A technical solution is known, chosen as the closest analogue, which is a device for blocking radio-controlled fuses, containing the first, second and third generators of a non-linearly changing voltage, the first, second and third voltage-controlled generators, a bandpass filter, the first and second signal inverters, a power amplifier , a two-position switch with a control unit, the first and second two-input signal adders and a radiating antenna. In this case, the output of the first shaper of the non-linearly changing voltage is connected to the input of the second signal inverter and the first signal input of the first two-input adder, the output of the second shaper of the non-linearly changing voltage is connected to the second signal input of the first two-input adder, the output of the first two-input adder is connected to the input of the first voltage-controlled generator, the output of the first voltage controlled generator is connected to the first signal input of the on/off switch and the input of the first signal inverter, the output of the first signal inverter is connected to the second signal input of the on/off switch, the output of the second inverter is connected to the input of the second voltage controlled generator, the output of the second voltage controlled generator , and the output of the two-position switch are connected to the inputs of the second two-input adder, the output of the second two-input adder is connected to the first band-pass filter, the output of which is connected It is connected to the input of the power amplifier, the output of which is connected to the input of the transmitting antenna, while the output of the third shaper of the non-linearly changing voltage is connected to the input of the third voltage-controlled generator, the output of the third voltage-controlled generator is connected to the input of the control unit by a two-position switch. RF patent No. 2732079, IPC H04K 3/00; F41H 11/12, published 09/11/2020.

Distinctive features of the proposed solution are the presence of at least 2 pairs of voltage-controlled generators, the inputs of which are connected to the output of a linearly varying voltage generator; the output of each pair of voltage controlled oscillators is connected to the input of an adder, the output of which is connected to the input of a bandpass filter, the output of which is connected to the input of an amplifier; the output of the amplifier of each pair of voltage controlled oscillators is connected to a common adder, the output of which is connected to the power amplifier, wherein each voltage controlled oscillator is configured to generate harmonic oscillations synchronized in time with the oscillations generated by the remaining voltage controlled oscillators, and out of phase with the oscillations generated by the rest of the voltage controlled oscillators.

Known devices for creating a radio interference signal cannot guarantee the blocking of jammed means in a given frequency range. Achieving the goal is accompanied by an increase in the power of the interference signal, which leads to a violation of sanitary and epidemiological rules and regulations when using such devices at the facility, to a significant impact on the operation of the equipment of base stations of telecom operators, to the release of the interference signal beyond the boundaries of the facility.

The technical result of the proposed technical solution is manifested in the improvement of the functional characteristics of the device.

Taking into account the specifics of the purpose of the device for creating a radio interference signal, the improvement of its functional characteristics should be understood, in particular, as an increase in the probability of guaranteed radio suppression without increasing the power of the interference signal.

It is known that the effectiveness of radio interference depends on the frequency and time structure of the interference and useful signals and their energy ratio at the input of the receiver of the suppressed means.

The technical result is achieved by the fact that the device for creating a radio interference signal for blocking mobile communication subscriber terminals and wireless radio access systems includes a linearly varying voltage generator, voltage-controlled generators, adders, bandpass filters, a power amplifier, the output of which is connected to a transmitting antenna, while the device includes at least 2 pairs of voltage-controlled oscillators, the inputs of which are connected to the output of a linearly varying voltage generator, the output of each pair of voltage-controlled oscillators is connected to the input of an adder, the output of which is connected to the input of a band-pass filter, the output of which is connected to the input of an amplifier , the output of the amplifier of each pair of voltage-controlled generators is connected to a common adder, the output of which is connected to the power amplifier, while each voltage-controlled generator is configured to generate harmonic oscillations synchronized in time and with the oscillations generated by the remaining voltage controlled generators and out of phase with the oscillations generated by the remaining voltage controlled generators.

To describe the essence of the technical solution, the following abbreviations were adopted:

CLAY - generator of linearly varying voltages;

VCO is a voltage controlled oscillator.

Due to the fact that the device for creating a radio interference signal for blocking subscriber terminals of mobile communication and wireless radio access systems includes at least 2 pairs of VCOs, the inputs of which are connected to the output of the GLI, the output of each pair of VCOs is connected to the input of the adder, the output of which is connected to the input bandpass filter, the output of which is connected to the input of the amplifier, the output of the amplifier of each pair of VCOs is connected to a common adder, the output of which is connected to the power amplifier, while each VCO is configured to generate harmonic oscillations synchronized in time with the oscillations generated by the remaining VCOs, and differing in phase with the oscillations generated by the rest of the VCOs, an increase in the temporal effect of the generated interference on the useful signal is proportional to n ² times, where n is the number of VCOs used to generate interference; the power spectral density of the interference signal increases by n times with the power of the transmitting elements unchanged, and the power of the interference signal decreases.

The claimed technical solution is further explained with the help of figures, which conditionally show one of the possible versions of the device for creating a radio interference signal for blocking mobile subscriber terminals and wireless radio access systems.

In FIG. 1 shows a block diagram of a device for creating a radio interference signal.

In FIG. 2 shows the signal at the CLAY output.

In FIG. 3 shows the signal at the output of the first VCO.

In FIG. 4 shows the signal at the output of the second VCO.

In FIG. 5 shows the signal at the output of the nth VCO.

In FIG. 6 shows the signal at the output of the first adder connected to the first and second VCOs.

In FIG. 7 shows the signal at the output of the second adder connected to the n-th VCO and n-1 VCO.

In FIG. 8 shows the signal at the output of the general adder.

In FIG. 9 shows the signal at the output of the power amplifier.

In FIG. 1. shows a device (1) for creating a radio interference signal, including:

- CLAY (2) with outlet (3);

- first VCO (4) with output (5);

- second VCO (6) with output (7);

- n-1 VCO (8) with output (9);

- n VCO (10) with output (11);

- the first adder (12) with output (13);

- second adder (14) with output (15);

- the first band pass filter (16) with output (17);

- second bandpass filter (18) with output (19);

- the first amplifier (20) with output (21);

- second amplifier (22) with output (23);

- common adder (24) with output (25);

- power amplifier (26) with output (27);

- transmitting antenna (28).

Next, with reference to the figures, the structure of the device (1) for creating a radio interference signal is described.

The device (1) for generating a radio interference signal includes a CLAY (2), the output (3) of which is connected to the inputs of the VCO (4), (6), (8), (10).

VCOs (4), (6), (8), (10) are configured to generate harmonic oscillations synchronized in time with oscillations generated by other VCOs (4), (6), (8) or (10) and differing in phase with the oscillations generated by the rest of the VCOs (4), (6), (8) or (10).

The output (5) of the first VCO (4) and the output (7) of the second VCO (6) are connected to the input of the first adder (12).

Output (9) n-1 VCO (8) and output (11) n-th VCO (10) are connected to the input of the second adder (14).

N is the total number of VCOs used in device (1), i.e., the nth VCO (10) corresponds to the last VCO (for example, the 4th if 4 VCOs are used in device (1), and n-1 VCOs ( 8) corresponds to the penultimate VCO (respectively, the 3rd one, if 4 VCOs are involved in the device (1). The value of n must be equal to an even number of VCOs.

The output (13) of the first adder (12) is connected to the input of the first bandpass filter (16).

The output (15) of the second adder (14) is connected to the input of the second band pass filter (18).

The output (17) of the first bandpass filter (16) is connected to the input of the first amplifier (20).

The output (21) of the first amplifier (20) and the output (23) of the second amplifier (22) are connected to the input of the common adder (24).

The output (25) of the common adder (24) is connected to the input of the power amplifier (26).

The output of the power amplifier (26) is connected to the transmitting antenna (28) (antenna-feeder system).

The "second" adder (14), bandpass filter (18) and amplifier (22) should be understood as the adder, bandpass filter and amplifier corresponding to the second pair of VCOs (if 4 VCOs are involved in the device) or each pair of VCOs except the first. At the same time, there can be any number of adders, band-pass filters and amplifiers, corresponding to the number of VCO pairs (n/2).

The device (1) to create a radio interference signal operates as follows.

CLAY (2) generates repetitive pulses t ₁ or t _n (μs) with stable time characteristics necessary for radio suppression of the required communication standard and data transmission over radio channels (Fig. 2). For various mobile communication standards and wireless radio access systems, t ₁ , t _n ranges from 30 to 60 μs. For example, for GSM - 30-40 µs; 4G, LTE - 30-40 µs; 3G, WCDMA (UMTS) - 50-60 µs; IEEE 802.11 (Wi-Fi, Bluetooth) - 50-60 µs; on-board transceiver modules of unmanned aerial vehicles of commercial type - 50-60 μs; subscriber devices of satellite mobile communication systems - 30-40 µs; subscriber devices for data transmission via radio channels of the radio navigation satellite service - 30-40 μs.

In the VCO (4), (6), (8), (10) oscillations are generated, the frequency of which is determined by the control voltage (U _control ). They convert the value of the control voltage, which varies in the range U _min -U _max , into the nominal output frequency in the range F _min -F _max corresponding to the frequency band of the signal transmission from the base station to the subscriber terminal of the blocked communication standard.

The control voltage sets the values of the center, as well as the lower and upper limits of the frequency range of the blocked communication standard (F c1 , F _1min , F _{1max ,} respectively) to the first VCO (4) (Fig. 3).

That is, the VCO is set to the center frequency F _C of the specified suppression range F _min - F _max with the suppression band setting.

Similarly, the control voltage sets the values of the center, lower and upper limits of the frequency range of the blocked communication standard (F _c2 , F _2min , F _2max , respectively) on the second VCO (6) (Fig. 4).

The control voltage sets the values of the center, as well as the lower and upper limits of the frequency range of the blocked communication standard (F _nц/2 , F _n/2min , F _n/2max ), corresponding to n/2 number of VCOs.

n/2 is accepted since an even number of VCOs is used, and the calculation is taken to determine the _Fc of the suppression band. Each VCO amplifier doubles the amount of interfering harmonics.

The control voltage sets the values of the center, as well as the lower and upper limits of the frequency range of the blocked communication standard (F cn , F _nmin , F _{nmax ,} respectively) on the n-th VCO (10) (Fig. 5).

In this case, F 2min \ _u003d F 1min \ _u003d F _{n / 2min} or F _2min ≠ F _1min ≠ F _{n / 2min} ; F _2max = F _1max = F _n/2max or F _2max ≠ F _1max ≠ F _n/2max ; F _nc/2 = (F _1c + ≤ 2 MHz) + ≤ n*2 MHz.

In adders (12) and (14), oscillations n/2 of the VCO number are summed together in the time interval t, while φ_one ≠φ₂ ≠φ_n-1≠φ_n, t = t_one = t₂ = t_n-1 = t_n (Fig. 6,7). Where φ_one, φ₂, φ_n-1, φ_n– oscillations of the first VCO (4), second VCO (6), n-1 VCO (8), n-th VCO (10), in the time interval, respectively, t_one, t₂, t_n-1, t_n.

The generated noise signals from the output (13) of the adder (12) and the output (15) of the adder (14) are fed to the inputs of the bandpass filters (16) and (18), respectively, with the bandwidth ΔF, where the out-of-band radiation F _u is suppressed, and the lower and the upper limit of the pass frequency of the bandpass filters (16) and (18) coincides with the required frequency range of radio suppression (Fig. 6, 7).

In amplifiers (20) and (22), the generated interference signals are amplified and from the outputs (21) and (23), respectively, are fed to a common adder (24), where they are summed (Fig. 8). At the same time, F _nц =F _nц/2 = (F _1ц + ≤ 2 MHz) + ≤ n * 2 MHz; F _min = F _{1min = F 2min = F nmin or F min} ≠ F _1min ≠ F _2min ≠ F _nmin ; F _max = F _1max = F _2max = F _nmax or F _max ≠ F _1max ≠ F _2max ≠ F _nmax , at φ ₁ ≠ φ ₂ ≠ φ _n , t = t ₁ = t ₂ = t _n . As a result of the summation, the temporary effect of the generated interference on the jammed signal increases proportionally by n² times.

Next, the signal is amplified to the required power in the power amplifier (26) and from its output (27) is fed to the transmitting antenna (28) (Fig. 9, where P _us is the power of the amplifier, P _um is the power of the power amplifier).

The inventive device for creating a radio interference signal for blocking subscriber terminals of mobile communications and wireless radio access systems is based on the use of a multicomponent method - deliberate, additive, multi-frequency, targeted - barrage, time-synchronized in a given frequency band interference. The device is characterized by improved functional characteristics, increased efficiency of radio suppression. The use of the claimed device is characterized by the possibility of creating n-1 zones of no interference, for the emission of useful signals, the possibility of radio suppression of users of mobile radiotelephone communications and data transmission over radio channels with unknown numbers using various radio access methods, in the territory required for radio suppression within the boundaries of the object.

The presented figures, description of the structure and use do not exhaust the possible options for execution and do not limit in any way the scope of the claimed technical solution. Other variants of execution and use within the scope of the claimed formula are possible.

Claims (1)

A device for creating a radio interference signal for blocking subscriber terminals of mobile communication and wireless radio access systems, including a linearly varying voltage generator, voltage-controlled generators, adders, bandpass filters, a power amplifier, the output of which is connected to a transmitting antenna, characterized in that it includes at least , two pairs of voltage controlled oscillators, the inputs of which are connected to the output of the ramp voltage generator, the output of each of the voltage controlled oscillators of each pair is connected to the corresponding input of the adder, the output of which is connected to the input of a bandpass filter, the output of which is connected to the input of the amplifier of the corresponding pair voltage-controlled generators, the output of each of the amplifiers of the corresponding pair of voltage-controlled generators is connected to the corresponding input of a common adder, the output of which is connected to the power amplifier, while each voltage-controlled generator, configured to generate harmonic oscillations that differ in frequency from oscillations generated by other voltage-controlled generators.

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