RU2310221C1 - Device for synchronizing clock - Google Patents

Abstract

FIELD: communication and alarm systems.

SUBSTANCE: device can be used for comparing time scales disposed at large distances and placed onto transportation vehicles and on-ground check and control point, as well as for remote control of technical condition of transportation vehicle and its location at on-ground check and control point. Device for synchronizing clock has CCD repeater, GPS navigation system satellites, first and second points. First point disposed at motionless object has frequency and time standard, two heterodynes, pseudo-noise signal generator, OR gate, three mixers, three intermediate frequency amplifiers, three power amplifiers, duplexer, receiving-transmitting aerial, two clippers, two memory units, correlator, two multipliers, two band-pass filters, two phase detectors, board controller, master oscillator, phase manipulator, detectors and on-board registrar. Second point, selected as on-ground check and control point, has frequency and time standard, two heterodynes, pseudo-noise signal oscillator, switch, OR gate, two mixers, two intermediate frequency amplifiers, two clippers, two memory units, correlator, multiplier, band-pass filter, phase detector, on-ground controller, master oscillator and phase manipulator.

EFFECT: widened functional abilities of device.

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Description

The proposed device relates to the field of communications and signaling and can be used to compare time scales spaced over a long distance and placed on vehicles and the ground control and monitoring center, and for remote monitoring of the technical condition of the vehicle and its location at the ground control center and control.

Known methods for clock synchronization (ed. Certificate of the USSR No. 591.799, 614.416, 970.300, 1.180.835, 1.244.632, 1.278.800; RF patents No. 2.001.423, 2.003.157, 2.040.035, 2.177.167; BC Gubanov, A. M. Finkelshtein, P. A. Fridman. Introduction to radio astronomy. - M., 1983 and others).

Of the known devices, the closest to the proposed one is "Clock synchronization device" (RF patent No. 2.001.423, G04C 11/02, 1992), which is selected as a prototype.

The specified device provides a comparison of time scales spaced over a long distance, and is based on the use of the duplex method of communication through a geostationary satellite repeater.

The main advantage of the duplex communication method is that it eliminates the length of the signal path. Therefore, its accuracy mainly depends on the parameters of the onboard transponder, the type of signal used, and the technique for measuring time intervals.

The known device provides clock synchronization only between stationary ground points spaced a long distance using a geostationary satellite repeater.

However, in practice, in some cases, the task of remote monitoring from the control and monitoring center for the behavior of a moving object, the operation of its systems and the actions of the crew, as well as remote monitoring of the technical condition of a moving object and its location, arises. At the same time, space, air, water and land vehicles can be used as moving objects.

An object of the invention is to expand the functionality of the device by remote control and monitoring the technical condition of the moving object and its location during the movement.

The problem is solved in that the clock synchronization device containing a satellite repeater, the first and second points, each of which contains a frequency and time standard connected in series, the first local oscillator, the first mixer, the first intermediate amplifier, the first power amplifier, duplexer, input-output which is connected to the transceiver antenna, a second power amplifier, a second mixer, the second input of which is connected through the second local oscillator to the first output of the frequency and time standard, the second clipper, the second input of which connected to the fourth output of the frequency and time reference, a second memory unit and a correlator connected in series to the second output of the frequency and time standard, a pseudo noise signal generator, a first clipper, the second input of which is connected to the third output of the frequency and time standard, and the first memory block, output which is connected to the second input of the correlator, is equipped at the first point with an OR element, two multipliers, two band-pass filters, two phase detectors, an on-board controller, sensors, an on-board recorder m, a master oscillator, a phase manipulator, a receiving antenna, a third power amplifier, a third mixer and a third intermediate frequency amplifier, and the first multiplier is connected to the output of the second intermediate frequency amplifier, the second input of which is connected to the output of the second local oscillator, the first bandpass filter, the first phase a detector, the second input of which is connected to the output of the first local oscillator, an on-board controller, the second input of which is connected to the output of the correlator, a phase manipulator, the second One of which is connected to the output of the master oscillator, and an OR element, the second input of which is connected via a switch to the second output of the pseudo-noise signal generator, and the output is connected to the second input of the first mixer, the third power amplifier, the third mixer, the second input of which are connected in series to the output of the receiving antenna connected to the output of the second local oscillator, a third intermediate frequency amplifier, a second multiplier, the second input of which is connected to the output of the second local oscillator, a second band-pass filter and a second a gas detector, the second input of which is connected to the output of the first local oscillator, and the output is connected to the third input of the on-board controller, the output of the sensors is connected to the on-board recorder and to the fourth input of the on-board controller, at the second point an OR element, a multiplier, a bandpass filter, a phase detector, a ground controller a master oscillator and a phase manipulator, and a multiplier is connected in series to the output of the second intermediate-frequency amplifier, the second input of which is connected to the output of the first getter one, by a bandpass filter, a phase detector, the second input of which is connected to the output of the second local oscillator, a ground controller, the second input of which is connected to the output of the correlator, a phase manipulator, the second input of which is connected to the output of the master oscillator, and an OR element, the second input of which is connected via a switch with the second output of the pseudo-noise signal generator, and the output is connected to the second input of the first mixer, while the first point is placed on a moving object, which can be selected as a space aural, water or land vehicle, and the second ground station is selected as the center of management and control.

The geometrical arrangement of the moving software object, the ground control and monitoring center of the CCM, the satellites of the GPS navigation system and the satellite relay S is shown in figure 1, where the following notation is introduced: O is the center of mass of the Earth; d is the base of the interferometer; r is the radius vector of the satellite repeater placed in a geostationary orbit. A frequency diagram explaining signal conversion is depicted in FIG. 2. The structural diagram of the ground control and monitoring center of the CMS is shown in FIG. 3 and FIG. 4. Timing diagrams explaining the operation of a moving object, a ground control and monitoring center and a GPS receiver are shown in FIGS. 5, 6 and 7. A timing diagram of the duplex clock comparison method is shown in FIG. 8, where the following notation is introduced: S, A, B is the time scale of the satellite repeater, the software mobile object, and the ground control and monitoring center of the CMS, respectively.

The clock synchronization device contains an IS3 repeater, the first and second points, each of which contains sequentially connected frequency and time reference 1.1 (2.1), the first local oscillator 1.2 (2.2), the first mixer 1.7 (2.7), the first intermediate frequency amplifier 1.8 (2.8) , the first power amplifier 1.9 (2.9), a duplexer 1.10 (2.10), the input-output of which is connected to the transceiver antenna 1.11 (2.11), the second power amplifier 1.12 (2.12), the second mixer 1.13 (2.13), the second input of which is connected to the output of the second local oscillator 1.3 (2.3), the second amplifier 1.14 (2.14) intermediate frequency, WTO the second clipper 1.16 (2.16), the second input of which is connected to the fourth output of the standard 1.1 (2.1) frequency and time, the second memory block 1.18 (2.18) and the controller 1.19 (2.19), connected in series to the second output of the standard 1.1 (2.1) frequency and time , a pseudo-noise signal generator 1.4 (2.4), the first clipper 1.15 (2.15), the second input of which is connected to the third output of the frequency and time standard 1.1 (2.1), and the first memory block 1.17 (2.17), the output of which is connected to the second input of the correlator 1.19 ( 2.19), connected in series to the output of the second intermediate-frequency amplifier 1.14 (2.14), trans the first multiplier 1.20 (2.20), the second input of which is connected to the output of the local oscillator 1.3 (2.2), the first bandpass filter 1.21 (2.21), the phase detector 1.22 (2.22), the second input of which is connected to the output of the local oscillator 1.2 (2.3), on-board (ground) controller 1.23 (2.23), the second input of which is connected to the output of the correlator 1.19 (2.19), the phase manipulator 1.25 (2.25), the second input of which is connected to the output of the master oscillator 1.24 (2.24), and the OR element 1.6 (2.6), the second input of which switch 1.5 (2.5) is connected to the second output of the pseudo noise signal generator 1.4 (2.4), and the output is connected to Valid mixer rum 1.7 (2.7).

In addition, the first item contains a GPS signal receiver, consisting of a series-connected receiving antenna 1.28, a third power amplifier 1.29, a mixer 1.30, the second input of which is connected to the output of a local oscillator 1.3, an intermediate-frequency amplifier 1.31, a multiplier 1.32, the second input of which is connected to the output the local oscillator 1.3, the band-pass filter 1.33 and the phase detector 1.34, the second input of which is connected to the output of the local oscillator 1.2, and the input is connected to the third input of the on-board controller 1.23, the fourth input of which is connected to the output of the sensors 26, to otorrhea also connected flight recorder 27.

In this case, the first point is located on a moving object, which can be selected as a space, air, water or land vehicle, and the second ground point is selected as a control and monitoring center.

The clock synchronization device operates as follows.

In the first step of single measurements at a time t ₁ ^A by the clock of a moving software object, the pseudo-noise signal α ₁ (Fig. 8), created by the generator 1.4 using the frequency and time standard 1.1, is converted using the local oscillator 1.2, mixer 1.7, and amplifier 1.8 of the first intermediate the frequencies into a signal with a frequency of ω ₁ , amplified by a power amplifier 1.9 and radiated through a duplexer 1.10 and a transceiver antenna 1.11 in the direction of the satellite A repeater S. However, the same signal is clipped in clipper 1.15 with a clock frequency of the same frequency standard 1.1 and the records They are inserted into the buffer memory 1.17. Registration is synchronized with frequency and time standard 1.1.

At the same time t ₁ ^A = t ₁ ^B according to the clock of the ground control center of the central control center using the same code sequence they generate the same noise microwave signal (signal β ₁ ), register, but do not send for registration (switch 2.5 open ) Onboard equipment of a satellite repeater receives a signal at a frequency of ω ₁ (signal α ₁ ), re-emits it to a moving object and a ground control and monitoring center at a frequency of ω ₂ with preserving phase relations, receives a relay signal at both points, converts it into a signal at a video frequency register at time t ₂ ^A and t ₂ ^B, respectively (signals α ₂ , β ₂ ).

At the second step (when transmitting a signal from the control and monitoring center), switch 1.5 must be open, and switch 2.5 is closed and signal α ₃ from generator 1.4 is transmitted through clipper 1.15 to the same memory device 1.17.

At an arbitrary point in time t ₃ ^B = t ₂ ^B + Θ, the noise of the microwave signal (β ₃ signal) is similarly generated and recorded by the hours of the second point. _On -board equipment of the AES repeater receives a signal at a frequency of ω ₁ (signal α ₃ ), re-emits it to points A and B at a frequency of ω ₂ while maintaining phase components, receives a relay signal at both points, converts it to signals at a video frequency, records at times time t ₄ ^A and t ₄ ^B, respectively (signals α ₄ and β ₄ ).

The correlation processing of two pairs of registered signals in the interval between the measurement events in the correlators 1.19 and 2.19 determines the following time delays and their derivatives:

where F _i is the frequency of interference (i = 1, 2, 3, 4);

a _j , b _j (j> 1, 2, 3) - signal propagation time between the satellite and points A and B, respectively;

,

- задержки сигналов в излучающей аппаратуре обоих пунктов;

,

- signal delays in the radiating equipment of both points;

,

- задержки сигналов в приемо-регистрирующей аппаратуре;

,

- signal delays in the receiving and recording equipment;

ΔS - signal delay in the onboard equipment of the satellite repeater;

Δt = t _B -t _A is the desired difference in the clock readings at the same physical moment.

,

, получим:Assuming a _j and b _j linear functions with derivatives

,

we get:

Where

Δ ' _{A, B} , Δ " _{A, B} - signal delays in the atmosphere at a frequency f ₁ and f _2, respectively;

ν - relativistic correction (Sagnac effect);

ω is the angular velocity of the Earth;

c is the speed of light;

D is the area of the O'A'S'B 'quadrangle formed in the equatorial plane by the center of mass of the Earth, the projections of points A, B and the satellite repeater.

The correction γ for the mobility of the satellite repeater during a single measurement is most easily reduced to zero by the appropriate choice of the free parameter Θ:

which should be calculated at the beginning of measurements by approximate ephemeris data, and then clarified by the results of current measurements.

As for the correction δ, hardware delays, it can be found by calibration using the “zero base” method. The atmospheric correction ε is also taken into account.

In points A and B, the equipment works the same way, only the order of steps in them is the opposite. To calculate the difference of the clock readings Δt, it is enough to exchange the received digital data between the points, which can be done via ordinary telephone or telegraph communication channels. The results of the comparison are sent to the airborne 1.23 and ground-based 2.23 controllers.

In the process of moving a movable object, sensors 26 located in various places of the vehicle (engine compartment, housing, control system, fuel tanks, etc.) transmit information about the state of the monitored vehicle components to the on-board recorder 27, which can be made in the form tape recorders, optical media, paper, etc.

At the same time, this information is fed to the second input of the on-board controller 1.23, to the third input of which information on the location of the moving object received from the GPS signal receiver is supplied. The latter consists of a receiving antenna 1.18, a power amplifier 1.29, a mixer 1.30, the second input of which is connected to the output of the local oscillator 1.3, amplifier 1.31 of the second intermediate frequency, multiplier 1.32, the second input of which is connected to the output of the local oscillator 1.3, band-pass filter 1.33 and phase detector 1.34, the second the input of which is connected to the output of the local oscillator 1.2, and the output is connected to the third input of the on-board controller 1.23.

The Global Positioning System (GPS) includes a space segment consisting of 24 satellites, a network of ground-based monitoring stations for their operation, and a user segment — GPS receivers.

Each GPS satellite emits at a frequency of ω ₂ = 1575 MHz a special navigation signal in the form of a binary phase-manipulated (PSK) signal, phase-manipulated pseudorandom sequence with a length of 1023 characters (Fig. 7, a):

0≤t≤T_c,

0≤t≤T _c ,

where φ _k (t) = {0, π} is the manipulated phase component that displays the law of phase manipulation in accordance with a pseudo-random sequence of duration N = 1023.

This signal is received by the antenna 1.28 and through the power amplifier 1.29 is fed to the first input of the mixer 1.30, the second input of which supplies the local oscillator voltage 1.3

At the output of the mixer 1.30, voltages of combination frequencies are generated. Amplifier 1.31 distinguishes the voltage of the second intermediate frequency (Fig.7, b)

0≤t≤T_c,

0≤t≤T _c ,

Where

K ₁ - gear ratio of the mixer;

_np2 ω = ω _z2 -ω ₂ - the second intermediate frequency;

φ _pr2 = φ ₂ -φ _g2 ,

which goes to the first input of the multiplier 1.32. The second input of the latter is supplied with voltage u _{g2 (t) of the} local oscillator 1.3. At the output of the multiplier a voltage is generated (Fig. 7, c)

0≤t≤T_c,

0≤t≤T _c ,

;Where

;

K ₂ - transfer coefficient of the multiplier;

w _{r1 r2} = ω -ω _WP2,

which is an FMN signal at a frequency ω _{g1 of the} local oscillator 1.2 and is fed to the first (information) input of the phase detector 1.34. The local oscillator voltage 1.2 is applied to the second (reference) input of the phase detector 1.34 as a reference voltage

As a result of synchronous detection at the output of the phase detector 1.3, a low-frequency voltage is generated (Fig. 7, d)

Where

K ₃ - the transfer coefficient of the phase detector,

which goes to the third input of the on-board controller 1.23, where the location of the moving object (latitude and longitude) is determined. For this, the presence of three satellites in the radio visibility zone is sufficient. The accuracy of determining the location of a moving object is 50 ... 80 m.

One of the main methods for increasing the accuracy of determining the location of a moving object and eliminating errors associated with the introduction of selective access mode is based on the application of the principle of differential navigation measurements, known in radio navigation.

The differential mode allows you to set the coordinates of the vehicle with an accuracy of 5 m in a dynamic navigation environment and up to 2 m in static.

The on-board controller 1.23, configured to program the time between radio sessions depending on the size of the parameters measured by the sensors 26, with a predetermined periodicity (for example, 30 minutes), transmits the received information through the on-board satellite communications segment, the satellite repeater and the ground-based satellite communications segment (location, event protocol, technical condition, the essence of the emergency situation, if it arose, as well as the full trajectory of movement for the intersession period) to the ground control center and control.

To this end, the master oscillator 1.24 generates a high-frequency oscillation (Fig.5, a)

0≤t≤T_c,

0≤t≤T _c ,

which goes to the first input of the phase manipulator 1.25. The second input of the latter is fed from the output of the on-board controller 1.23 modulating code M ₁ (t) (Fig.5, b) containing information about the technical condition of the moving object and its location. At the output of the phase manipulator 1.25, a complex QPSK signal is generated (Fig. 5, c)

0≤t≤T_c,

0≤t≤T _c ,

where φ _k1 (t) = {0, π} is the manipulation component of the phase, which displays the law of phase manipulation in accordance with the modulating code M ₁ (t) (Fig. 5, b), and φ _k1 (t) = const at kτ _e <t <(k + 1) τ _e and can change stepwise at t = kτ _e , i.e. at the borders between elementary premises (k = 1, 2, ... N-1);

τ _e , N is the duration and number of chips that make up a signal of duration T _c1 (T _c1 = Nτ _e ), which through an OR 1.6 element is supplied to the first input of the first mixer 1.7. The second mixer 1.7 from the output of the first local oscillator 1.2 is supplied with voltage u _g1 (t). The OR 1.6 element provides the sequence of receipt at the first input of the mixer 1.7 of the pseudo-noise microwave signal from the output of the generator 1.6 and the PSK signal from the output of the phase detector 1.25. At the output of mixer 1.7, voltages of combination frequencies are generated. Amplifier 1.8 is allocated voltage only the first intermediate (total) frequency (figure 5, g)

0≤t≤T_c,

0≤t≤T _c ,

;Where

;

ω _pr1 = ω _c + ω _g1 - the first intermediate (total) frequency;

φ _pr1 = φ _c + φ _g1 ,

which after amplification in the power amplifier 1.9 through the duplexer 1.10 enters the transceiver antenna 1.11, it is broadcasted in the direction of the satellite, re-emitted by it at the same frequency while maintaining phase relationships, it is received by the antenna 2.11 of the ground control and monitoring center and through the duplexer 2.10 and power amplifier 2.12 is supplied to the first input of the mixer 2.13, the second input of which is supplied with the voltage u _u1 (t) of the local oscillator 2.3. At the output of the mixer 2.13, voltages of combination frequencies are generated. Amplifier 2.14 allocated voltage of the second intermediate (differential) frequency (Fig.5, d)

0≤t≤T_c1,

0≤t≤T _c1 ,

;Where

;

ω _pr2 = ω _{pr1 -ω g1} - the second intermediate (difference) frequency;

φ _pr3 = φ _pr1 -φ _g1 ,

which goes to the first input of the multiplier 2.20. The voltage u _g2 (t) of the local oscillator 2.2 is supplied to the second input of the multiplier 2.20. At the output of the multiplier 2.20, a voltage is generated (Fig. 5, e)

0≤t≤T_c1,

0≤t≤T _c1 ,

;Where

;

_d1 = ω ω _ave = ω _z2 -ω _np2 - intermediate frequency,

which is allocated by the band-pass filter 2.21 and arrives at the first (information) input of the phase detector 2.22. At the second (reference) input of the phase detector 2.22, a voltage u _g1 (t) of the local oscillator 2.3 is supplied as a reference voltage. As a result of synchronous detection at the output of the phase detector 2.22, a low-frequency voltage is generated (figure 5, g)

Where

which goes to the second input of the ground controller 2.23.

Based on the results of the analysis of the situation by the ground controller 2.23 at the ground control and control center, an appropriate decision is made, for example, to turn off the faulty engine, or recommendations are made to the crew on actions in case of emergencies.

To transmit these commands in the ground controller 2.23, a modulating code M ₂ (t) is generated (Fig.6, b), which is fed to the second input of the phase manipulator 2.25. At the first input of the latter is fed a high-frequency oscillation from the output of the master oscillator 2.24 (Fig.6, a)

0≤t≤T_c2.

0≤t≤T _c2 .

At the output of the phase manipulator 2.25, a complex QPSK signal is generated (Fig.6, b)

0≤t≤T_c2,

0≤t≤T _c2 ,

which through the element OR 2.6 enters the first input of the mixer 2.7. The voltage u _g2 (t) of the local oscillator 2.2 is supplied to the second input of the mixer 2.7. At the output of the mixer 2.7, voltages of combination frequencies are generated. Amplifier 2.8 allocated voltage of the intermediate frequency (Fig.6, g)

0≤t≤T_c2,

0≤t≤T _c2 ,

Where

ω _CR = ω _g2 -ω _c = ω ₂ - intermediate frequency;

φ ₄ = φ _c -φ _g2 ,

which, after amplification in the power amplifier 2.9, through the duplexer 2.10 enters the transceiver antenna 2.11, is emitted by it in the direction of the artificial satellite relay at the frequency ω ₂ , is reradiated by the onboard equipment of the artificial satellite repeater with preserving phase relations, it is received by the antenna 1.11 of the moving object and through the duplexer 1.10 and the power amplifier 1.12 is supplied to the first input of the mixer 1.13, the second input of which is supplied with the voltage u _g2 (t) of the local oscillator 1.3. At the output of the mixer 1.13, voltages of combination frequencies are formed. Amplifier 1.14 distinguishes the voltage of the second intermediate frequency (Fig.6, d)

0≤t≤T_c2,

0≤t≤T _c2 ,

Where

_np2 ω = ω _z2 -ω ₂ - the second intermediate frequency;

φ ₆ = φ ₄ -φ _g2 ,

which goes to the first input of the multiplier 1.20. The second input of the latter is supplied with voltage u _g2 (t) of the local oscillator 1.3. At the output of the multiplier 1.20 a voltage is generated (Fig.6, e)

0≤t≤T_c2,

0≤t≤T _c2 ,

Where

_straight ω = ω _z2 -ω _np2 = ω _ave - intermediate frequency;

φ ₇ = φ ₆ -φ _g2 ,

which is allocated by the band-pass filter 1.21 and arrives at the first input of the phase detector 1.22. The second (reference) input of the phase detector 1.22 is supplied with voltage u _g1 (t) as the reference voltage. As a result of synchronous detection at the output of the phase detector 1.22, a low-frequency voltage is generated (Fig.6, g)

Where

which goes to the fourth input of the on-board controller 1.23, where the commands and recommendations of the ground control and monitoring center are implemented.

If all the parameters measured by the sensors 26 correspond to the conditions of normal operation of the moving object, and the location of the moving object to the planned location, the transmission of discrete information from the board of the moving object to the ground control and monitoring center occurs at a predetermined frequency (for example, once every 30 minutes).

If at least one of the measured parameters of a given level is exceeded or the location of the moving object deviates from the planned location, the period between transfers is reduced.

When creating an emergency, discrete information from the board of a moving object is transmitted continuously.

The mode of transmission of discrete information by the on-board controller 1.23 can also be changed by a decision of the command staff of a moving object or by a ground control and control center.

When the controlled parameters return to acceptable values, as well as the correspondence of the location of the moving object to the planned location, the period between the transmission of discrete information will again be increased.

Thus, the proposed device clock synchronization in comparison with the prototype provides not only the comparison of remote time scales, but also remote control and monitoring of the technical condition of the moving object and its location during the movement. This is achieved by using the duplex radio communication method using complex signals with phase shift keying.

These signals open up new possibilities in the technique of transmitting discrete information. They allow you to apply a new type of selection - structural selection. This means that there is a new opportunity to separate signals operating in the same frequency band and at the same time intervals.

Among other problems, the solution of which largely determines the further progress of radio communications, should include the problem of establishing reliable communication in channels in the presence of a multipath nature of the propagation of radio waves. The presence of the multipath nature of the propagation of radio waves leads to a distortion of the received signals, which complicates the reception and reduces the reliability of the transmission of information.

Attempts to overcome the harmful effects of multipath have been made for a long time. These include diversity reception, signal selection by time and angle of arrival, corrective coding, and some other methods. However, all of them do not provide a fundamental solution to the problem.

Due to its good correlation properties, a complex FMN signal can be “folded” into a narrow pulse, the duration of which is inversely proportional to the used bandwidth. Choosing such a frequency band so that the duration of the “convoluted” pulse is less than the delay time, it is possible to separately receive pulses arriving at the receiving point in various ways, and by summing their energy, it is also possible to increase the noise immunity of complex QPSK signals. Thus, the indicated problem gets a fundamental solution.

From the point of view of detection, complex QPSK signals have high energy and structural secrecy.

The energy secrecy of these signals is due to their high compressibility in time and spectrum with optimal processing, which reduces the instantaneous radiated power. As a result, a complex QPSK signal at the receiving point may be masked by noise and interference. Moreover, the energy of a complex QPSK signal is by no means small. It is simply distributed over the time-frequency domain so that at each point in this area the signal power is less than the power of noise and interference.

The structural secrecy of complex QPSK signals is due to the wide variety of their shapes and significant ranges of parameter changes, which makes it difficult to optimize or at least quasi-optimal processing of complex QPSK signals of an a priori unknown structure in order to increase the sensitivity of the receiver.

The proposed device can be used to monitor flight operations by air and sea vehicles, to control the exercises of long-range aviation and the navy, during the flight of manned spacecraft and artificial Earth satellites, to ensure testing of aviation and marine equipment beyond the scope of the test bases, for control over the work of inexperienced crews and worn equipment.

Using the proposed device allows you to make decisions on action in emergency situations at the time of their occurrence, transmit recommendations on how to deal with emergency situations on board a moving object, give instructions to emergency services in the event of an emergency, give an accurate target designation to search for a vehicle that has crashed. Thus, the functionality of the device is expanded.

Claims (1)

A clock synchronization device containing a satellite repeater, the first and second points, each of which contains a frequency and time reference, a first local oscillator, a first mixer, a first intermediate frequency amplifier, a first power amplifier, a duplexer, the input-output of which is connected to a transceiver antenna , a second power amplifier, a second mixer, the second input of which is connected through the second local oscillator to the first output of the frequency and time reference, the second clipper, the second input of which is connected to the fourth output ohm of the frequency and time reference, a second memory unit and a correlator connected in series to the second output of the frequency and time standard, a pseudo-noise signal generator, a first clipper, the second input of which is connected to the third output of the frequency and time standard, and the first memory block, the output of which is connected to the second input of the correlator, characterized in that it is equipped on the first paragraph with an OR element, two multipliers, two band-pass filters, two phase detectors, on-board controller, sensors, on-board recorder, a transmitting generator, a phase manipulator, a receiving antenna, a third power amplifier, a third mixer, a third intermediate frequency amplifier, and the first multiplier, the second input of which is connected to the output of the second local oscillator, the first bandpass filter, the first phase detector, are connected in series to the output of the second intermediate frequency amplifier the second input of which is connected to the output of the first local oscillator, the on-board controller, the second input of which is connected to the output of the correlator, a phase manipulator, the second input to is connected to the output of the master oscillator, and the OR element, the second input of which is connected via the switch to the second output of the pseudo-noise signal generator, and the output is connected to the second input of the first mixer, the third power amplifier, the third mixer, the second input of which is connected to the output of the receiving antenna with the output of the second local oscillator, a third intermediate frequency amplifier, a second multiplier, the second input of which is connected to the output of the second local oscillator, a second bandpass filter and a second phase the second detector, the second input of which is connected to the output of the first local oscillator, and the output is connected to the third input of the on-board controller, the sensors output is connected to the on-board recorder and to the fourth input of the on-board controller, at the second point the device is equipped with an OR element, a multiplier, a bandpass filter, a phase detector, a ground controller, a master oscillator and a phase manipulator, and a multiplier is connected in series to the output of the second intermediate-frequency amplifier, the second input of which is connected to the output ohm of the first local oscillator, a bandpass filter, a phase detector, the second input of which is connected to the output of the second local oscillator, a ground controller, the second input of which is connected to the output of the correlator, a phase manipulator, the second input of which is connected to the output of the master oscillator, and an OR element, the second input of which the switch is connected to the second output of the pseudo-noise signal generator, and the output is connected to the second input of the first mixer, while the first item is placed on a moving object, which can be selected as smicheskoe, air, water or land vehicle, and the second ground station is selected as the center of management and control.

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