RU2662642C1 - Method of time scale synchronization - Google Patents

Abstract

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to the field of radio engineering and can be used in order to create the synchronization systems for time scales of spatially separated objects. Result is achieved by means of using for creating the data channel the exact time information of meteor tracks that simultaneously scatter the signal forward to the point of the frequency and time keeper and reflect the signal back to the reference keeper point. Essence of the synchronization method is in the following operations. Time stamps are transmitted over a channel, which is created by meteor tracks, on which the signal carrying the time stamp information is scattered, forward, to the receiving point, and back to the receiver of the reference oscillator, which allows, on the basis of an estimate of the propagation time of the signal in the data channel, to generate a synchronizing timestamp of the reference oscillator taking into account the delay of the synchronizing stamp in the channel without using additional measurements.

EFFECT: reduced volume of measurements during synchronization of the time scales of spatially separated time and frequency keepers along the meteoric radio channel.

1 cl, 5 dwg

Description

The invention relates to the field of radio engineering and can be used to synchronize time scales of spatially separated objects using radio communication means, while being most effective when used in polar latitudes. The alleged invention provides the ability to synchronize time scales using a meteor radio channel, since the physical features of meteor propagation of radio waves provide low sensitivity to ionospheric anomalies of polar latitudes, which is confirmed theoretically and experimentally [1, 2].

The applicant has carried out an analysis of the prior art and revealed several technical solutions similar to the alleged invention. Further, the analogues identified by the applicant are examined in more detail.

Known [3] analogue according to the invention by AS USSR No. 479076 (class G04F 5/00) in which a method for standard measurement of time intervals based on synchronization of spatially separated generators of a single time system using meteor radio reflections when signals are emitted by stations of the master and slave generators, characterized in that, for the purpose of reduce the number of operating communication channels and implement automatic correction of the slave generator, the pulses of the latter are emitted with a pass through one, receive them on the side of the master generator, per The next pulse of the leading generator is emitted and simultaneously for each re-emitted pulse, while on the side of the slave generator, time intervals are measured between the reference and re-emitted pulses of this generator, as well as between its reference pulses and the received pulse of the leading generator.

Thus, the general idea of the analogue [3] is that they exclude the use of additional communication channels for the simultaneous transmission of time stamps using time division of a communication channel of one frequency. The technical result of the analogue [3] is to reduce the operating communication channels and the ability to automatically correct the slave synchronization object using sequential radiation of pulses of time stamps of the master and slave time and frequency generators on each side of the synchronization. The synchronization of the slave object is carried out by correcting its time scale based on the obtained time intervals between the reference and emitted pulses of the master and slave objects.

A disadvantage of the known method [3] is the need for the slave and leading parties to have time and frequency generators equipped with appropriate transceiver radio equipment, which complicates the synchronization hardware, makes them less compact, more energy-intensive (which is important, for example, when organizing a large number of networks unvisited objects), increases their cost and complexity in operation. However, from the description of the method it is not clear what synchronization accuracy can be achieved and what advantage is achieved in synchronization accuracy, compared with the prior art.

From the investigated prior art, the applicant revealed an invention, a method for comparing time scales and a device for its implementation according to A.S. USSR No. 1644079 (class G04C 11/02) [4], intended for time scale synchronization systems that use communication channels with varying signal propagation times to transmit time stamps. One such channel is the meteor radio channel.

The brief essence of the known method consists in the formation in the master and slave points of the signals of the main, reference and measuring time scales with a delay relative to the original scale and synchronous transmission of received signals in turn with radio channels with subsequent measurement of time delays before and after re-emission. The method [4] is characterized in that, in order to increase the accuracy of synchronization, corrections to time scales are determined and phase correction of the main, reference and measuring time scales is made by the values of these corrections, radio transmission and reception are made in the master and slave points of the first amendments and register the received time intervals of the delays, exchange the correction signals again, and also transmit and receive the second additional correction signals.

The correction of the time scales is carried out by half the difference of the received corrections by shifting ahead of the adjusted time scales of the master and slave points.

The advantages of the method [4] is to increase the accuracy of synchronization of time scales and the ability to synchronize scales without the presence of a reference clock.

The disadvantage of this method [4] is the use of three different time scales and two types of corrections, which complicates the device and the synchronization protocol. An error at one of the stages of the timeline synchronization algorithm will cause a synchronization error on both devices. In addition, the analogue [4] also belongs to the class of active methods for synchronizing time scales, therefore, it has the same disadvantages of the analogue [3].

From the investigated prior art revealed a method of reconciling spatially separated standards of time and frequency according to the patent of Ukraine No. 37929 (CL G04G 7/02) [5], the essence of this method is to use the reference signals of time and frequency, which are transmitted as part of a television broadcast signal, characterized in that the television signal is received via a meteor radio channel, and the delay in its propagation is determined by calculating the length of the meteor track using the geographical coordinates of the transmission points and receiving meteor trail and angular coordinates.

The method [5] is based on the ability to determine the exact position of the reflecting point on the meteor track, ie the ionized region of the meteor track, on which the scattering of the transmitted signal occurs. Knowing the spatial coordinates of the reflecting point, as well as the receiving and transmitting points, the distance traveled by the radio wave path from the transmitter to the receiver is calculated. This eliminates the propagation time of the clock signal and thereby increases the achievable synchronization accuracy to 50 μs. A significant drawback of the analogue [5] is the need for mandatory determination of the coordinates of the reflecting point of the meteor shower, which requires additional equipment (for example, a goniometer, directional and tracking antenna systems), which greatly complicates the technical implementation of synchronization and technical support of the equipment.

The closest analogue (prototype) to the alleged invention according to the applicant is a method of reconciling spatially separated standards of time and frequency according to the patent of Ukraine No. 54198 (CL G04G 7/00) [6], which consists in using reference signals of time and frequency, which are transmitted in the composition a television broadcasting signal and received via a meteor channel, characterized in that the length of the meteor track is calculated using data on the height of the meteor track received by the passive difference-range measuring method at the receiving point. This allows you to increase the accuracy of synchronization to 10 μs.

To determine the height of the meteor track used, the authors of [6] propose using data from three independent receiving antennas. In this case, the measurements are carried out according to the passive difference-ranging method [7]. In the framework of the prototype method [6] they solve the problem of semi-active phase-synchronization of a television signal received at three points as a result of scattering on a particular meteor track.

The disadvantage of this method [6] is the need for a large number of transceiver equipment for its implementation, namely: a transmitter and three receivers, which should be located in the slave point and on the line of the radio wave propagation path to obtain distances to the reflecting point of the meteor track.

Knowing these distances, the coordinates of the reflecting point on the given meteor track are geometrically calculated.

This method significantly limits the possibility of using the prototype in practice and also requires a technologically sophisticated synchronization system, which also makes it less mobile.

The claimed technical solution is aimed at achieving the stated goal of ensuring synchronization of time scales on a meteor radio channel in a semi-active way without defining the parameters of the meteor track used with the possibility of maintaining the utmost accuracy of synchronization of time scales up to tens of microseconds., While the claimed method should provide (in more detail) the possibility of implementing the following goals :

- synchronization of spaced hours in the absence of infrastructure;

- synchronization of spaced hours in the absence of the possibility of accurate synchronization in other ways (for example, in polar latitudes);

- synchronization of objects located in reception points for which covert information transmission is important in order to prevent their detection by response radiation (military and sensitive objects).

The claimed technical solution is illustrated in FIG. 1, 2, 3, 4, 5.

In FIG. 1 shows the geometry of the scattering of radio waves on a meteor track with two reflecting points at the location of the slave generator R and the master generator T.

In FIG. Figure 2 presents the analytical justification for the existence of meteor traces with the possibility of joint scattering of the signal forward, to the slave time generator, and back to the reference time generator.

In FIG. 3 is a flowchart of the claimed method for synchronizing time scales.

In FIG. 4 is a block diagram of a device for a method of synchronizing time scales at a leading point.

In FIG. 5 is a block diagram of an apparatus for a method of synchronizing time scales at a slave point.

The essence of the technical solution is the method of synchronizing time scales, based on the semi-active method of measuring the shift of scales by time stamps transmitted via a meteor radio channel, characterized in that the time stamps are transmitted through a channel created by meteor traces on which the signal carrying information about the mark is scattered time, forward, to the receiving point, and back to the receiver of the reference generator, which allows, based on an estimate of the propagation time of the signal in the data transmission channel, to form without using anija additional synchronization measurement reference mark generator delay time based on the synchronization mark in the channel.

The industrial feasibility of the claimed technical solution is justified by the following analytical considerations. From general geometric considerations, it is known [8] that when a radio wave scatters on a meteor shower in the opposite direction, the scattering point (for simplicity we will call it a “reflecting point” for simplicity) should belong to the family of concentric spheres in the center of which the transmitter lies. A particular sphere is determined by the condition of its contact with the meteor track at the reflecting point. Similarly, when scattering radio waves in the forward direction, the reflecting point must belong to the family of confocal ellipsoids, at the foci of which the receiver and transmitter are located. A particular ellipsoid is determined by the condition of its contact with the meteor track at the reflecting point. In the framework of the proposed method, the transmitter is the leading synchronization object - item T. The passive receiver is the synchronization slave object - item R.

Meteor tracks are formed on the meteor track of any length and geographical location with a certain intensity (the intensity of formation depends on the parameters of the transceiver radio equipment, the geographical position and geometry of the radio line, the characteristics of the influx of meteors into the Earth’s atmosphere during the communication session and other factors), which simultaneously provide the possibility of scattering radio signal in both forward and reverse directions. Geometrically, such two-sided scattering meteor tracks are tangent both to the family of concentric spheres centered at the point of transmission T, and to the family of confocal ellipsoids, at the foci of which the points of transmission T and reception R are located. An example of such a trace is shown in FIG. 2.

The geometric criterion for a two-way scattering meteor track is a necessary but not sufficient condition for the technical implementation of the claimed method. The implementation of the method requires compliance with a number of additional conditions on the equipment parameters of the leading synchronization object T, determined by the physics of meteor trails.

Firstly, the power of radio reflections from meteor tracks should exceed the threshold level, determined in accordance with the power of internal noise in the transceiver path, the power of cosmic noise, and the power of noise of other natural and man-made origin [8].

Secondly, the antennas of the leading synchronization object T must be oriented in such a way as to effectively use the largest number of two-way scattering meteor tracks forming on a given path.

As a justification for the technical feasibility of the proposed method, we present the results of simulation of a test radio link for meteor communication, obtained using a simulation model of meteor communication systems "KAMET" [9]. The KAMET model takes into account long-term statistics of radar observations of the intensity of the influx of meteor matter into the Earth’s atmosphere, collected using the Kazan University meteor radar. The test radio link for implementing the proposed synchronization method had the following parameters typical for meteor communication systems:

- Moscow-Kazan radio link, length - 720 km;

- The era of the communication session - March, 6:00 local time;

- transmitter power - 1000 W;

- carrier frequency - 50 MHz;

- antenna system of the leading communication point - antenna array (2 rows × 2 floors), antenna array element - 5-element “wave channel” of horizontal polarization;

- antenna system of the slave communication point - a single 5-element “wave channel” of horizontal polarization;

- signal registration threshold - 1 μV;

- type of modulation of the synchronization signal - binary phase shift keying (BPSK) with a frequency band of 9 KHz.

According to the results of simulation with the above parameters, at least 20 two-way scattering meteor tracks are recorded daily on the test radio line according to statistics.

When optimizing the parameters of the equipment, the recorded number of bilaterally scattering meteor tracks can be increased by an order of magnitude or more. Thus, for a typical meteor communication radio link, the possibility of recording (using industrially available radio equipment) double-sided scattering meteor trails on which the implementation of the proposed method is based is justified. Next, we proceed directly to the disclosure of the technical nature of the proposed method for synchronizing time scales.

The time scales are synchronized according to the claimed technical solution based on a semi-active method, i.e. method using a single emitting source associated with the reference clock and located in point T, which transmits a time stamp to the point with the slave clock R. The data channel form meteor tracks, providing the ability to scatter the signal in the forward direction of transmission (to the receiving point R) , as well as the possibility of scattering the signal back (to point T), as shown in FIG. 1. Such traces have two reflective points for the emitted signals: point M ₀ , at which the signal is scattered to the receiving point R, and point M ₁ , from which the signal is reflected back to the transmission point T.

Meteor tracks with two-way signal scattering are used to exclude (from the correction introduced in the slave clause) the signal propagation time t _P with the exact time mark in the meteor radio channel. The indicated propagation time t _{P of the} signal with the exact time stamp with accuracy sufficient for practical use is determined by measuring the propagation time of the signal to the meteor track using the location method, i.e. by the delay in receiving the return signal scattered by the trace in the opposite direction:

- оценка времени распространения t_P, c - скорость света в вакууме (см. Фиг. 1).Where

- estimate of the propagation time t _P , c is the speed of light in vacuum (see Fig. 1).

включают в состав синхронизирующего сигнала и наряду с меткой времени передают на ведомый объект синхронизации (пункт R). При этом ошибка синхронизации δt_C определяется только разницей между истинным временем распространения сигнала в метеорном радиоканале t_P и его оценкой

согласно времени локации расстояния до метеорного следа 2d₀/c:After that, the delay estimate for the signal propagation time

include in the composition of the synchronization signal and along with the time stamp transmit to the slave synchronization object (point R). Moreover, the synchronization error δt _C is determined only by the difference between the true signal propagation time in the meteor radio channel t _P and its estimate

according to the location time of the distance to the meteor shower 2d ₀ / s:

According to FIG. 1, the synchronization error δt _c → 0 as M ₁ → M ₀ .

The proposed method is carried out, for example, as follows. Suppose there are points with spatially separated clocks whose synchronization is required to be ensured. Suppose that the reference clock is located at point T, and the driven clock is located at point R. Time stamps are transmitted via the meteor radio channel using the semi-active method (only the leading point is emitting). Leading point T can broadcast two types of signals: sounding signals and synchronizing signals. Let us explain the purpose and transmission order of these types of signals.

согласно времени локации до метеорного следа. В качестве зондирующих сигналов могут быть использованы, например, радиоимпульсы большой длительности с немодулированным заполнением. Ведущий пункт Т с периодичностью τ_з испускает в эфир зондирующие сигналы. После излучения каждого зондирующего сигнала ведущий пункт Т на интервале времени t∈[0, τ_з) ожидает прихода отраженной от метеорного следа копии, которая должна превосходить заданный порог регистрации. В случае обнаружения отраженного сигнала замеряют его задержку относительно момента излучения, которую далее используют в качестве оценки времени распространения сигнала в метеорном канале

После этого на ведущем пункте T запускают процедуру формирования метки времени и дальнейшие операции по синхронизации. Период зондирования τ_з выбирают исходя из максимально возможной дальности распространения сигнала на заданной метеорной трассе: τ_З>r_1max+r_2max.The sounding signals are used to establish the fact of the formation of the meteor track and the availability of the meteor radio channel for subsequent transmission of the synchronizing signal. After detecting the meteor trace, the sounding signal is used to estimate the delay by the propagation time of the signal in the meteor channel

according to the location time to the meteor track. As probing signals, for example, radio pulses of long duration with unmodulated filling can be used. The leading point T with a frequency of τ _s emits sounding signals on the air. After the emission of each sounding signal, the leading point T in the time interval t∈ [0, τ _h ) expects the arrival of a copy reflected from the meteor shower, which must exceed the specified registration threshold. If a reflected signal is detected, its delay relative to the moment of radiation is measured, which is then used as an estimate of the signal propagation time in the meteor channel

After that, at the leading point T, the time stamp formation procedure and further synchronization operations are started. Sensing period τ _s is selected based on the maximum possible range of the propagation path at a predetermined meteoric: τ _W> r _1max + r _2max.

The sounding signals from the leading point T can also be received by the slave point R. In the case of receiving a sounding signal, the slave point R ignores them and does not take any action to correct its time scale.

The synchronizing signals contain a time stamp taking into account the correction for the propagation delay of the signal in the meteor radio channel. Any digital modulation methods can be used to generate synchronization signals, for example, multiposition phase (MPSK) or frequency shift keying (MFSK).

Conditionally, the implementation of the proposed synchronization method can be divided into the following steps (Fig. 3):

1. At lead point T, a meteor trace is detected by regularly emitting a sounding signal.

2. After detecting a meteor trace in the leading point T, the delay of the signal reflected from it is measured.

используя в качестве этой оценки измеренную на этапе 2 задержку отраженного от метеорного следа сигнала.3. In the leading point T form an estimate of the propagation time of the signal in the meteor channel

using as this estimate the delay measured in step 2 of the signal reflected from the meteor track.

Метку точного времени далее подвергают модуляции, чем формируют синхронизирующий сигнал.4. In the leading point T, an exact time mark is formed by advancing the reference scale to estimate the propagation time of the signal in the meteor channel

The time stamp is then subjected to modulation, which generates a synchronization signal.

5. A synchronization signal is transmitted to the slave object via a meteor radio channel formed by a two-way scattering meteor track.

6. The slave synchronization object (point R) receives the clock signal, demodulates it, extracts the time stamp and corrects its scale. This eliminates the current departure of the timeline of the slave synchronization object from the reference scale, thereby achieving the stated goal of synchronizing the timelines.

The proposed synchronization method can be implemented, for example, using devices whose functional block diagrams are presented in FIG. 4 (located at lead point T) and in FIG. 5 (located at slave point R).

The synchronization device of the leading point T (see Fig. 4) contains an antenna 1, an antenna switch 2, a transmitter 3, a receiver 4, a reference time and frequency saver 5 (EHF), a control device 6 (UE), a signal conditioner 7, a time interval meter 8 (IVI), meteor radio reflection analyzer 9 (AMRO). The antenna 1 is electrically connected to the antenna switch 2, which is electrically connected to the transmitter 3, the receiver 4 and receives the control signal "reception / transmission mode" from the UE 6. The transmitter 3 is electrically connected to the antenna switch 2 and the signal conditioner 7. The receiver 4 is electrically connected to antenna switch 2, with IVI 8 and AMRO 9. The receiver 4 also receives a reference signal from the EHF 5, as well as control signals for configuring the reception parameters (contain information about the threshold level of registration, demodulation parameters and decoding, etc.) from UU 6. The reference keeper of time and frequency 5 generates a reference signal and signals of internal synchronization of the device blocks. EHF 5 is electrically connected to receiver 4, with UU 6, with signal shaper 7, with IVI 8. Control device 6 is electrically connected with antenna switch 2, with EHF 5, with signal shaper 7, with IVI 8 (two wire lines), and also with AMRO 9. Technically, UU 6 can be implemented, for example, on the basis of a microcontroller or microprocessor with a package of specially designed control programs. The signal conditioner 7 is electrically connected to the transmitter 3, with EHF 5 and UU 6. The time interval meter 8 is electrically connected to the receiver 4, with EHF 5, with UU 6 (two wire lines), and also with AMRO 9. One at a time (out of two ) of the wire line IVI 8 transmits to UI 6 the result of measuring the time interval, and on the second line - receives from UU 6 a command to start the countdown of the time interval. Technically, IVI 8 can be implemented, for example, on the basis of a digital counter that counts the number of clock pulses from the EHF 5 that fit into the measured time period. The meteor radio reflection analyzer 9 is electrically connected to the receiver 4, to the UU 6 and IVI 8. Technically, AMRO 9 can be implemented, for example, on the basis of a programmable logic integrated circuit (FPGA) board.

The synchronization device of the slave point R (see Fig. 5) comprises an antenna 1, a receiver 2, a control device 3, and a time and frequency keeper 4 (HHV). The antenna 1 is electrically connected to the receiver 2, which is electrically connected to the control device 3. In addition, the reference signal from the VHF 4, as well as the control signals for configuring the reception parameters (contain information about the threshold level of registration, demodulation and decoding parameters, etc. .d.) from the control device 3. The control device 3 is electrically connected to the receiver 2 by two wire lines (on one line to the control device 3 receives information signals from the receiver 2, and the second d - from the control device 3 control signals are sent to the receiver 2) and from the VHF 4. The time and frequency keeper 4 generates a reference signal and internal synchronization signals of the device blocks. VHF 4 is electrically connected to the receiver 2 and to the control device 3.

Consider a possible implementation of the proposed synchronization method using synchronization devices of the master and slave points of communication, the block diagrams of which are presented, respectively, in FIG. 4 and FIG. 5. The purpose of synchronization is to link the time scale of the keeper of time and frequency 3 in the slave point R to the scale of the reference keeper of time and frequency 5 of the leading point T with accuracy acceptable for practical use.

The proposed method of synchronizing time scales is carried out, for example, as follows. UU 6 of the leading point T sets the program for the implementation of all the main stages of the proposed synchronization method. With a given frequency τ _s UU 6 generates commands for the generation and transmission of the probing signal. These commands are sent to the antenna switch 2, the signal conditioner 7, and to the IVI 8. In this case, the UI 6 sets the antenna switch 2 to the signal transmission mode, and also sets for the IVI 8 the initial time of reference of the time interval (the initial moment of reference can be set to UA 6 taking into account possible signal delay in the receiving path). According to the command received from UU 6, the signal shaper 7 generates a probe signal based on the reference frequency of the EHF 5 with the given UU 6 duration and frequency. The generated sounding signal enters the transmitter 3, where it is amplified to the required power. From the output of the transmitter 3, the probe signal through the antenna switch 2 is fed to the antenna 1, as a result of which it is radiated into the ionosphere. At the end of the transmission of the probing signal UU 6 puts the antenna switch 2 in the mode of signal reception.

возвратного сигнала относительно начала отсчета времени. Результат измерения задержки

поступает с ИВИ 8 на УУ 6 и АМРО 9. В анализаторе метеорных радиоотражений 9 определяют тип принятого радиоотражения с учетом поступившего от ИВИ 8 измерения

временной задержки. Если обнаруженное радиоотражение является метеорным, то АМРО 9 передает на УУ 6 положительный признак, в противном случае - негативный признак.Reflecting from any inhomogeneity in the ionosphere (this is not necessarily a meteor track), the return sounding signal is received using antenna 1. Through the antenna switch 2, the return sounding signal is sent to receiver 4, where it is detected and compared with a given detection threshold. If the received signal is higher than the set threshold, then from the output of the receiver 4 it then goes to IVI 8 and AMRO 9. In this case, IVI 8 measures the time delay

return signal relative to the time reference. Delay Measurement Result

comes from IVI 8 to UU 6 and AMRO 9. In the meteor radio reflection analyzer 9, the type of received radio reflection is determined taking into account the measurement received from IVI 8

time delay. If the detected radio reflection is meteoric, then AMPO 9 transmits a positive sign to UU 6, otherwise a negative sign.

Этим формируют эталонную метку времени. Кроме того, УУ 6 может опережающим образом сдвигать эталонную метку на возможную задержку синхронизирующего сигнала в передающем тракте.Upon receipt of a negative sign UU 6 initiates a new cycle of periodic radiation of the probe signal. Upon receipt of a positive sign UU 6 makes a decision on the formation and transmission of the reference time stamp through the detected meteor track. For this, UU 6 reads the current timestamp from EHF 5 and shifts it forward by the previously measured value

This forms a reference time stamp. In addition, SU 6 can advance the shift of the reference mark by a possible delay of the synchronization signal in the transmitting path.

After that, CC 6 initiates the mode of generation and transmission of the synchronizing signal by supplying the corresponding control signals to the antenna switch 2 and the signal shaper 7. Moreover, CC 6 sets the antenna switch 2 to the signal transmission mode. The signal conditioner 7 receives a command from the control unit 6, which contains information about the reference time stamp, and, on the basis of the reference frequency from the EHF 5, generates a synchronizing signal at the operating frequency, performs encoding and modulation of the signal. The synchronization signal is then sent to the transmitter 3, where it is amplified to the required power. From the output of the transmitter 3, the probe signal through the antenna switch 2 is fed to the antenna 1, as a result of which it is transmitted to the meteor radio channel.

At the end of the transmission of the synchronization signal UU 6 leading point T initiates a new cycle of periodic radiation of the probing signal.

Consider the implementation of the steps of the proposed synchronization method in the slave point R. Using the antenna 1 of the slave point R, a synchronization signal is received in which a reference time stamp is enclosed. The received signal is detected in the receiver 2 and compared with a predetermined registration threshold. If the received signal exceeds a predetermined threshold, then it is demodulated and decoded. The information extracted from the received signal is received from the receiver 2 to the control device 3. The control device 3 analyzes the preamble and, in case of detecting signs of a synchronizing signal, extracts information about the reference time stamp. The control device 3 can correct the received reference mark for a possible signal delay in the receiving path. After that, the control device 3, taking into account the reference time stamp, generates a command for correcting the time scale for the VHF 4. Based on the command received from the control device 3, the VHF 4 adjusts its time scale, thereby synchronizing the time scales of the slave and master communication points, i.e. achieve the target technical result. On this, a single cycle of synchronization of time scales is considered successfully completed.

The proposed method, in comparison with the prototype, simplifies the synchronization algorithm for spatially separated clocks, and also provides the ability to work without two-sided radiation, which simplifies the synchronization equipment and allows you to solve the problem of transmitting time stamps without using additional measurements to determine the parameters of the radio channel.

The proposed method provides the ability to implement the following goals:

- synchronization of spaced hours in the absence of infrastructure;

- synchronization of spaced hours in the absence of the possibility of accurate synchronization in other ways (for example, in polar latitudes);

- synchronization of objects located in reception points for which covert information transmission is important in order to prevent their detection by response radiation (military and security facilities).

The alleged invention meets the criteria of novelty, since in determining the prior art no means have been found which have the same features that are identical to all the features listed in the claims, including the purpose of the application.

The proposed method has an inventive step, because no technical solutions have been identified that have features that match the distinguishing features of this invention, and the popularity of the influence of distinctive features on the claimed technical result is not established.

The claimed technical solution can be implemented in industry by using well-known standard devices and methods, for example: KB transmit-receive equipment, time keepers and frequency standards, frequency synthesizers, methods for determining the temporary position of a signal in a radio channel, a set of microprocessors and standard digital logic elements (registers, signal processors, memory chips, etc.), and meets the criterion of "industrial applicability" to the invention.

Used sources

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2. Akira Fukuda, Kaiji Mukumoto, Yasuaki Yoshihiro, Masauji Nagasawa, Hisao Yamagishi, Natsuo Sato, Huigen Yang, Ming Wu Yao, Experiments on meteor burst communications in the Antarctic, Final report, Adv. Polar Upper Atmos. Res., 17, 120-136, 2003.

3. Naumochkin V.F., Shestakov Yu.I. The method of reference measurement of time periods // Copyright certificate for the invention No. 479076. Published 07/30/1975 Bull. No. 28.

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9. A. Karpov, "The computer model" KAMET ": The new generation version," Proc. Meteroids 2001 Conf., Pp. 367-370, Kiruna (Sweden), 6-10 Aug, 2001.

Claims (1)

A method of synchronizing time scales based on a semi-active method of measuring the shift of scales by time stamps transmitted via a meteor radio channel, characterized in that the time stamps are transmitted along a channel created by meteor traces, on which the signal carrying information about the time stamp is scattered forward the receiving point, and back to the receiver of the reference generator, which allows, based on an estimate of the propagation time of the signal in the data channel, to form without using additional measurements of synchronization The time stamp of the reference generator, taking into account the delay of the synchronization mark in the channel.

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