RU2554321C1 - Device for determination of direction and distance to signal source - Google Patents

Abstract

FIELD: measurement equipment.

SUBSTANCE: device includes the first antenna 1, small-pressure barometer 2, the first ADC 3, the second ADC 4, the third ADC 5, the fourth ADC 6, the fifth ADC 7, personal computer (PC or a microprocessor) 8, unit of a common timing system (GPS or GLONASS) 9, subscriber coupling unit 10, the first amplifier 11, the first filter 12, the second amplifier 13, the first threshold unit 14, OR circuit 15, the second antenna 16, the third amplifier 17, the second filter 18, the fourth amplifier 19, the second threshold unit 20, the third antenna 21, the fifth amplifier 22, the third filter 23, the sixth amplifier 24, the third threshold unit 25, the seventh amplifier 26, the fourth filter 27, the eighth amplifier 28, the fifth filter 29, the fourth threshold unit 30, the first AND circuit 31, the first DAC 32, the first calibrator 33, the second DAC 34, the second calibrator 35, the third DAC 36, the third calibrator 36, the fourth DAC 37, the fourth calibrator 38, the fifth DAC 39, the first shaper 40, the sixth DAC 42, the second shaper 43, the first timer 44, the second AND circuit 45, the first counter 46, clock generator 47, the second timer 48, the first quad unit 49, adder 50, divider 51, the fifth threshold unit 52, the third AND circuit 53, the third timer 54, the fourth AND circuit 55, the second counter 56, the second quad unit 57, and the third quad unit 58.

EFFECT: possible use of a device at short distances in real time and increase of interference immunity of the device at available interfering signals.

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Description

The invention relates to measuring equipment, in particular to direction finders.

A device for determining the direction [1], containing a cathode ray tube, a series-connected first magnetic antenna, a band-pass filter, an amplifier, a synchronous detector and a signal conditioner, a series-connected second magnetic antenna, a band-pass filter, an amplifier, a synchronous detector and a signal conditioner, is sequentially connected to an electric antenna, a third bandpass filter, a third amplifier, a phase shifter and a limiter, the output of the latter being connected to the second inputs of the first and second horn synchronous detectors, and the outputs of the signal conditioners are connected to a cathode ray tube.

This device does not provide the ability to assess the range to signal sources.

The closest technical solution to the proposed one is a device for determining the direction and distance to the signal source [2] (a combined lightning detection system consisting of an infrasound complex and an electric antenna) containing three microbarometers, an infrasound microphone, and an electrostatic fluxmeter connected via analog-to-digital converters ( ADC) to a personal electronic computer (PC or microprocessor). In the prototype, the location of the signal source and the range are determined after the event by the results of further processing by the operator of the recorded signals. To determine the azimuth, the differences in the time of arrival of infrasound signals by no less than three microbarometers are used, separated by more than 90 meters (three-position recording system), and to determine the distance, the difference in time of arrival to the electrostatic fluxmeter and infrasound microphone (or microbarometers) is used . The disadvantages of the prototype are the inability to use it at a single-point observation point or on a vehicle, the inability to use at short distances in real time, low noise immunity of the device due to the use of the electrical signal component, as well as in the presence of interfering signals.

The technical result provided by the claimed invention is the ability to use the device at a single-point observation point or vehicle, the ability to use the device at short distances in real time and increase the noise immunity of the device in the presence of interfering signals.

The technical result is achieved by the fact that the device for determining the direction and distance to the signal source, containing the first antenna and microbarometer, as well as the first, second, third, fourth and fifth analog-to-digital converters connected to a personal electronic computer (PC or microprocessor) additionally contains a unit of a single time system (GPS or Glonass) and a communication unit with subscribers connected to a personal computer, serially connected to a first amplifier, a first filter, a second amplifier, and the first the second block and the OR circuit, the second antenna, the third amplifier, the second filter, the fourth amplifier and the second threshold block, the third antenna, the fifth amplifier, the third filter, the sixth amplifier and the third threshold block, the seventh amplifier, the fourth filter connected in series, the eighth amplifier, the fifth filter, the fourth threshold block and the first circuit And, connected in series to the first digital-to-analog converter (DAC) and the first calibrator, connected in series to the second DAC and WTO a swarm calibrator, a third DAC and a third calibrator connected in series, a fourth DAC and a fourth calibrator connected in series, a fifth DAC and a first shaper connected in series, a sixth DAC and a second shaper connected in series, a first timer, a second AND circuit and a first counter, as well as a clock a generator connected to the second input of the second circuit And, a second timer, connected to the second input of the first circuit And, connected in series to the analog first quad a torus, an adder, a divider, a fifth threshold block and a third AND circuit, a third timer, a fourth And circuit and a second counter connected in series, as well as analog second and third quadrators, connected by inputs to the second and third filters, and outputs, respectively, connected to the second input of the adder and to the second input of the divider, the first, second and third antennas are made magnetic and placed mutually perpendicular to each other, the first, second, third, fourth and fifth threshold blocks are made with controlled eat on the threshold, the first, second, third, fourth and fifth filters are made with bandwidth control, the first, second, third, fourth, fifth, sixth, seventh and eighth amplifiers are made with phase and sensitivity control, the first, second and third timers are controlled by the duration of the output signal, the first circuit AND is connected by the third input to the first timer, and the output is connected to the stop input of the first counter, the third circuit And is connected by the second input to the third timer, and the output is connected to the stop input and the second counter, the fourth AND circuit is connected by the second input to the clock generator, the fifth ADC is connected by the input to the output of the divider, the OR circuit is connected by the second and third inputs, respectively, to the second and third threshold blocks, and the output is connected to the PC and to the first and third timers , the first quadrator is connected to the output of the first filter, the first antenna is connected to the first amplifier, the microbarometer is connected to the seventh amplifier and the input is acoustically connected to the fourth calibrator, the first driver is connected to the control to the inputs of the first, second and third filters, the second driver is connected to the control inputs of the fourth and fifth filters, the inputs of the first, second, third and fourth ADCs are connected, respectively, to the first, second, third and fourth filters, the outputs of the first, second and third calibrators connected, respectively, to the first, second and third antennas, and the inputs of the first, second, third, fourth, fifth and sixth DACs, the control inputs of the first, second, third, fourth, fifth, sixth, seventh and eighth amplifiers teley, control inputs of the first, second, third, fourth and fifth blocks thresholds, the outputs of the first and second counters, a control input and an output of the first timer, control input and output of the second timer, and control input and output of the third timer connected to the PC.

This embodiment of the device for determining the direction and distance to the signal source provides the possibility of using the device at a single-point observation point or vehicle, the ability to use the device at short distances in real time and increasing the noise immunity of the device in the presence of interfering signals.

The drawing shows a structural diagram of the proposed device.

Accepted designations:

1 - the first antenna, 2 - a microbarometer, 3 - the first analog-to-digital converter (ADC), 4 - the second ADC, 5 - the third ADC, 6 - the fourth ADC, 7 - the fifth ADC, 8 - the personal electronic computer (PC or microprocessor), 9 - unit of the single time system (GPS or Glonass), 10 - communication unit with subscribers, 11 - first amplifier, 12 - first filter, 13 - second amplifier, 14 - first threshold unit, 15 - OR circuit, 16 - second antenna, 17 — third amplifier, 18 — second filter, 19 — fourth amplifier, 20 — second threshold unit, 21 — third antenna, 22 — fifth amplifier, 23 — third Iltr, 24 - the sixth amplifier, 25 - the third threshold block, 26 - the seventh amplifier, 27 - the fourth filter, 28 - the eighth amplifier, 29 - the fifth filter, 30 - the fourth threshold block, 31 - the first I circuit, 32 - the first digital-to-analog converter (DAC), 33 - the first calibrator, 34 - the second DAC, 35 - the second calibrator, 36 - the third DAC, 37 - the third calibrator, 38 - the fourth DAC, 39 - the fourth calibrator, 40 - the fifth DAC, 41 - the first driver, 42 - the sixth DAC, 43 - the second driver, 44 - the first timer, 45 - the second circuit I, 46 - the first counter, 47 - the clock, 48 - the second timer, 49 - the first squarer minutes, 50 - adder, 51 - divider, 52 - fifth threshold unit, 53 - the third AND circuit, 54 - the third timer 55 - the fourth AND circuit, 56 - second counter, 57 - second squarer, 58 - the third squarer.

The device for determining the direction and distance to the signal source contains a first antenna 1 and a microbarometer 2, as well as a first analog-to-digital converter (ADC) 3, a second ADC 4, a third ADC 5, a fourth ADC 6 and a fifth ADC 7 connected to a personal electronic a computer (personal computer or microprocessor) 8, a unit of the single time system (GPS or Glonass) 9 and a communication unit with subscribers 10 connected to the personal computer, connected in series to the first amplifier 11, the first filter 12, the second amplifier 13, the first threshold block 14 and the circuit OR 15, after the second antenna 16, the third amplifier 17, the second filter 18, the fourth amplifier 19 and the second threshold unit 20, connected in series with the third antenna 21, the fifth amplifier 22, the third filter 23, the sixth amplifier 24 and the third threshold unit 25, connected in series with the seventh amplifier 26, a fourth filter 27, an eighth amplifier 28, a fifth filter 29, a fourth threshold unit 30, and a first AND circuit 31, serially connected a first digital-to-analog converter (DAC) 32 and a first calibrator 33, serially connected to a second DAC 34 and W swarm calibrator 35, series-connected third DAC 36 and third calibrator 37, series-connected fourth DAC 38 and fourth calibrator 39, series-connected fifth DAC 40 and first driver 41, series-connected sixth DAC 42 and second driver 43, series-connected first timer 44, the second circuit And 45 and the first counter 46, as well as a clock generator 47 connected to the second input of the second circuit And, a second timer 48, connected to the second input of the first circuit And, connected in series and the analogous first quadrator 49, the adder 50, the divider 51, the fifth threshold unit 52 and the third AND 53 circuit, the third timer 54 connected in series, the fourth And 55 circuit and the second counter 56, as well as the analog second quadrator 57 and the third quadrator 58 connected by inputs, respectively, to the second and third filters 18, 23, and the outputs connected, respectively, to the second input of the adder and to the second input of the divider, the first, second and third antennas 1, 16, 21 are made magnetic and placed mutually perpendicular to each other, the first second tert th, fourth and fifth threshold blocks 14, 20, 25, 30, 52 are made with threshold control, the first, second, third, fourth and fifth filters 12, 18, 23, 27, 29 are made with bandwidth control, first, the second, third, fourth, fifth, sixth, seventh and eighth amplifiers 11, 13, 17, 19, 22, 24, 26, 28 are made with phase and sensitivity control, the first, second and third timers 44, 48, 54 are made with control by the duration of the output signal, the first circuit And 31 is connected by the third input to the first timer 44, and the output is connected to the stop input of the first count meter, the third AND 53 circuit is connected by the second input to the third timer 54, and the output is connected to the stop input of the second counter, the fourth And 55 circuit is connected by the second input to the clock generator 47, the fifth ADC 7 is connected by the input to the output of the divider 51, the OR circuit 15 is connected by the second and third inputs, respectively, to the second and third threshold blocks 20, 25, and the output is connected to a PC 8, to the first and third timers 44, 54, the first quadrator 49 is connected to the output of the first filter, the first antenna 1 is connected to the first amplifier 11, microbarometer 2 sub provided with an output to the seventh amplifier 26, and the input is acoustically connected to the fourth calibrator 39, the first driver 41 is connected to the control inputs of the first, second and third filters, the second driver 43 is connected to the control inputs of the fourth and fifth filters, inputs of the first, second, third and fourth ADCs are connected, respectively, to the first, second, third and fourth filters 12, 18, 23, 27, the outputs of the first, second and third calibrators are connected, respectively, to the first, second and third antennas 1, 16, 21, and the inputs of the first, at orogo, third, fourth, fifth and sixth DAC, control inputs of the first, second, third, fourth, fifth, sixth, seventh and eighth amplifiers, control inputs of the first, second, third, fourth and fifth threshold blocks, outputs of the first and second counters, the control input and output of the first timer, the control input and output of the second timer, as well as the control input and output of the third timer are connected to the PC 8.

A device for determining the direction and distance to the signal source operates as follows. The currents induced in the first magnetic antenna 1, the second magnetic antenna 16 and the third magnetic antenna 21 from the signal source, through the first, second and third amplifiers 11, 17, 22, filters 12, 18, 23 and ADC 3, 4, 5 enter A personal computer 8, where the information processing cycle begins when the signal from any of the three antennas exceeds the threshold value set for it. The received signals of orthogonal antennas are used to estimate the direction to the signal source by known methods [3]. At the same time, from the output of the first filter 12, the signals are supplied through the second amplifier 13 to the first threshold block 14, from the output of the second filter 18, signals are transmitted through the fourth amplifier 19 to the second threshold block 20, and from the output of the third filter 23, the signals are transmitted through the sixth amplifier 24 to the third threshold block 25. When the signals exceed the values specified by the PC 8, at the outputs of the first, second and third threshold blocks 14, 20, 25, logical units are formed that go to the OR 15 circuit, the output signal of which starts the first and third timers 4 4 and 54. The output signal of the first timer 44 allows the passage of pulses from the clock generator 47 through the second AND circuit 45 to the first counter 46 and prepares the first circuit And 31, and the output signal of the third timer 54 allows the passage of pulses from the clock generator 47 through the fourth circuit And 55 to the second counter 56 and prepares the third circuit AND 53. Thus, the countdown starts from the moment of arrival of the registered event, for example, a lightning discharge, at the observation point of electromagnetic radiation (EMR). The infrasound wave accompanying this event arrives at the observation point later, is received by a microbarometer 2, the output signal of which is transmitted through the seventh amplifier 26, the fourth filter 27, and the fourth ADC 6 to the PC 8, where it is also stored through the eighth amplifier 28 and the fifth filter 29 the fourth threshold block 30. When the signal exceeds the value specified by the PC 8, the output of the fourth threshold block 30 forms a logical unit that goes to the first circuit And 31, the output signal of which stops the first counts to 46, if the second timer 48 is activated by a command from the PC 8 at this moment, forming a logical unit at the second input of the first circuit And 31. The obtained value of the time interval from the output of the first counter 46 goes to the PC 8, where the microbarometer is measured in advance during calibration the real value of the speed of infrasound determines the distance to the signal source, together with the direction determining the location of the signal source. To prevent false stops of the first counter 46 from later near signals that may appear during the propagation of infrasound, the personal computer 8 calculates the approximate range value [4] and the expected arrival times of the infrasound with a margin for estimation errors, and from the readings of the first counter 46 to the desired PC moment 8 opens a time window using a second timer 48 for passing the stop signal of the first counter 46. The approximate range value is calculated based on the difference in the moments of arrival of the direct and EMR signals from the ionosphere [4], which enters the PC 8 from the second counter 56. For this, the signals from the outputs of the first and second filters 12, 18 through the first and second quadrants 49, 57 are fed to the adder 50, from the output of which a signal proportional the sum of the squares of the input signals, is fed to the divider 51. A signal proportional to the square of the signal from the output of the third filter 23, the quotient of dividing by the sum of the squares, is a function of the squared tangent of the angle of inclination magnetically to the second input of the divider 51 signal components relative to the horizontal plane. In the proposed technical solution, the moment of arrival of the reflected signal is determined by changing the angle of inclination of the magnetic component of the signal. To this end, the signal from the output of the divider 51 is fed to the fifth ADC 7 and input to the PC 8, and also fed through the fifth threshold block 52 to the third circuit And 53. In the absence of a useful signal from the output of the OR 15 circuit, the logical unit does not enter the PC 8, does not start the third timer 54 and the PC 8 maintains a response threshold that excludes the appearance of a signal at the output of the fifth threshold block 52. When a useful signal appears, the third timer 54 allows the pulses of the clock generator 47 to pass through the fourth AND circuit 55, the second counter 56 starts counting time, and the PC 8 receives from the fifth ADC 7 the current signal value from the output of the divider 51, generates the upper and lower values of this signal, sends these values in the form of upper and lower thresholds of the fifth threshold block 52 and maintains these thresholds during the time the output signal is available the third timer 54. If the value of the signal at the output of the divider 51 goes beyond the upper or lower values, an output logic unit is generated at the output of the fifth threshold block 52, stopping the second counter 56 through the third circuit And 53, prepared the third timer 54. The obtained value of the time interval τ _З from the output of the second counter 56 enters the PC 8, where the approximate value of the distance R to the signal source is determined by the preselected (according to local conditions) height of the ionosphere D-layer.

1. In the absence of interference, a broadband mode can be implemented in which the signals from the outputs of the first, third and fifth amplifiers 11, 17, 22, respectively, through the first, second and third filters 12, 18, 23 and through the first, second and third ADCs 3, 4, 5 enter the PC 8 to implement, for example, the simplest algorithm for estimating the direction to the signal source.

When a useful signal appears, the direction of α to the signal source is estimated, for example, according to the formula [3]

$$\alpha =\left(\frac{180}{\pi }arctg\frac{A_{\mathrm{one}}}{A_2}\right)$$

where A ₁ , A ₂ are the amplitudes of the signals of the middle frequency entering the PC 8 from the second and first ADCs 4, 3, respectively.

An approximate range assessment is carried out according to the formula [4]

$$R=\frac{R_{3}c{\tau }_3}{h}-\sqrt{{\left(\frac{R_{3}c{\tau }_3}{h}\right)}^2+2c^2{\tau }_3^2\frac{R_3}{h}-\mathrm{four}{R}_3^{2}h}$$

where R is the distance traveled by the earth wave to the signal source; R _З - radius of the Earth; τ _C - time delay of a spatial wave; h is the specified effective height of the ionospheric layer D; c is the speed of light.

A more accurate value of the range R _t is determined after the arrival of the infrasound wave from the difference in the moments τ of the arrival of the EMR signal and infrasound and according to the value of the speed of infrasound V previously measured during calibration of the microbarometer:

R _t = V

2. When interference occurs that does not clog the entire operating frequency range, in the PC 8, according to the results of the preliminary frequency analysis, control signals are generated for the EMR and infrasound ranges separately, which are fed to the fifth and sixth DACs 40, 42 and through the first and second shapers 41, 43 arrive at the control inputs of the first, second and third filters 12, 18, 23 of the EMR range, as well as the control inputs of the fourth and fifth filters 27, 29 of the infrasound range and cut out sections of the interference frequency from the passband. The structure of the first and second shapers 41, 43 depends on the type of control of the filters, in the simplest case it can be smoothing links with power amplifiers, if the filters are voltage controlled. Depending on the background and the level of interference from the signals from the PC 8, the trigger levels are also pre-set separately for the first, second, third and fourth threshold blocks 14, 20, 25 and 30.

The required amplitude and phase ratios of the signals are generated using PC commands 8 received at the control inputs of the first, second, third, fourth, fifth, sixth, seventh and eighth amplifiers 11, 13, 17, 19, 22, 24, 26, 28.

These modes of operation of the device can be implemented simultaneously in different combinations, using a separate control for each amplifier and filter.

To control the amplifier-converter paths, calibration signals are provided for the first, second, and third magnetic antennas 1, 16, 21 from, respectively, the first, second, and third calibrators 33, 35, 37 controlled by a personal computer 8 using the first, second, and third DACs 32, 34, 36.

Calibration of the microbarometer 2 is carried out using the fourth calibrator 39. The fourth calibrator 39 is a source of pulsed and sinusoidal infrasound controlled from the PC 8, in the simplest case it can be a power amplifier with a dynamic loudspeaker. The fourth calibrator 39 is installed at a distance of one or several meters from the microbarometer 2 and is acoustically connected to the latter through the environment. In the process of calibration, the amplitude-frequency characteristic (AFC) of the microbarometer 2 with the seventh amplifier 26 and the fourth filter 27 is determined, as well as the actual speed of infrasound at the current moment. For this, the personal computer 8 stores digital images of the reference sinusoidal signals and the pulse signal, which are transmitted from the PC 8 to the fourth calibrator 39 through the fourth DAC 38. To remove the frequency response, reference sinusoidal acoustic signals with frequencies of the operating range of the microbarometer 2 are transmitted to the microbarometer 2, which are converted , amplified, filtered, and through the fourth ADC 6 enter the PC 8, where the frequency response is calculated. To determine the real speed of infrasound at the current moment, the PC 8 supplies a reference pulse signal to the fourth calibrator 39, simultaneously starts the second timer 48 and starts through the first timer 44 the first counter 46, which starts counting the infrasound passage of the known distance between the fourth calibrator 39 and microbarometer 2, the output signal of which through the seventh amplifier 26, the fourth filter 27, as well as through the eighth amplifier 28 and the fifth filter 29 is supplied to the fourth threshold block 30 and the first circuit And 31 and stop injects the first counter 46. The obtained value of the time interval from the output of the first counter 46 goes to the personal computer 8, where the actual speed of infrasound at the current moment is determined by the known distance between the fourth calibrator 39 and the microbarometer 2 to calculate the exact value of the distance to the signal source.

Information obtained during the operation is tied to a single time using block 9 of the single time system (GPS or Glonass) and transmitted to the destination using block 10 communication with subscribers.

Thus, the proposed device for determining the direction and distance to the signal source in comparison with the prototype provides the ability to use the device at a single-point observation point or vehicle, the ability to use the device at short distances in real time and increase the noise immunity of the device in the presence of interfering signals.

Information sources

1. Forgotten radio meteorology, V. Polyakov, Journal of Radio, 2004, No. 7, pp. 29-30,

http://detect-ufo.narod.ru/pribor/detect_radio/pelengatr_01.html,

http://www.chipinfo.ru/literature/radio/200407/p29-30.html.

2. Electromagnetic acoustic system for detecting lightning discharges, K.V. Voznesenskaya, A.V. Soloviev, I.S. Gibanov, D.S. Provotorov, M.V. Chepchugov, A.A. Bocharov, Bulletin of the science of Siberia. Series Engineering Sciences 2012. No. 5 (6), pp. 70-75, http://sjs.tpu.ru. UDC 534.321.8.

3. Broadband two-component receiving antenna device (RF patent No. 2474014 C1, H01Q 7/04, publ. 01/27/2013).

4. Analysis of methods and means of passive radar detection of thunderclouds, Pavel Truskovsky, Proceedings of International Conference RelStat04, Part 3, pp. 431-437, Transport and Telecommunication Institute, Lomonosova 1, Riga, LV-1019, Latvia, E-mail : truskovskis@tsi.lv.

Claims (1)

A device for determining the direction and distance to the signal source, containing the first antenna and microbarometer, as well as the first, second, third, fourth and fifth analog-to-digital converters connected to a personal electronic computer (PC), characterized in that it further comprises a unit single time systems and a subscriber communication unit connected to a PC, a first amplifier, a first filter, a second amplifier, a first threshold unit and an OR circuit connected in series with a second a antenna, a third amplifier, a second filter, a fourth amplifier and a second threshold unit, connected in series with a third antenna, a fifth amplifier, a third filter, a sixth amplifier and a third threshold unit, connected in series with a seventh amplifier, a fourth filter, an eighth amplifier, a fifth filter, and a fourth threshold unit and the first circuit And, the first digital-to-analog converter (DAC) and the first calibrator connected in series, the second DAC and the second calibrator connected in series, the third DAC and connected in series a third calibrator, a fourth DAC and a fourth calibrator connected in series, a fifth DAC and a first shaper connected in series, a sixth DAC and a second shaper connected in series, a first timer, a second AND circuit and a first counter, and a clock connected to the second input of the second circuit And, the second timer, connected by the output to the second input of the first circuit AND, is connected in series with the analog first quadrator, adder, divider, fifth threshold block and third circuit And, the third timer, the fourth AND circuit and the second counter are connected in series, as well as the analog second and third quadrators connected by the inputs to the second and third filters, respectively, and the outputs connected, respectively, to the second input of the adder and to the second input of the divider, moreover, the first, second and third antennas are made magnetic and placed mutually perpendicular to each other, the first, second, third, fourth and fifth threshold blocks are made with threshold control, the first, second, third, fourth and fifth fil Fourths are made with bandwidth control, the first, second, third, fourth, fifth, sixth, seventh and eighth amplifiers are controlled by phase and sensitivity, the first, second and third timers are controlled by the duration of the output signal, the first circuit is connected the third input to the first timer, and the output is connected to the stop input of the first counter, the third circuit And is connected by the second input to the third timer, and the output is connected to the stop input of the second counter, the fourth circuit And is connected to the second one to the clock, the fifth ADC is connected by the input to the output of the divider, the OR circuit is connected by the second and third inputs, respectively, to the second and third threshold blocks, and the output is connected to the PC and to the first and third timers, the first quadrator is connected to the output of the first filter, the first antenna is connected to the first amplifier, the microbarometer is connected by the output to the seventh amplifier, and the input is acoustically connected to the fourth calibrator, the first driver is connected to the control inputs of the first, second and third filters, second the first driver is connected to the control inputs of the fourth and fifth filters, the inputs of the first, second, third and fourth ADCs are connected, respectively, to the first, second, third and fourth filters, the outputs of the first, second and third calibrators are connected, respectively, to the first, second and the third antennas, and the inputs of the first, second, third, fourth, fifth and sixth DACs, the control inputs of the first, second, third, fourth, fifth, sixth, seventh and eighth amplifiers, the control inputs of the first, second, third, four rtogo blocks and fifth thresholds, the outputs of the first and second counters, a control input and an output of the first timer, control input and output of the second timer, and control input and output of the third timer connected to the PC.