RU2013121063A - CLOCK SYNCHRONIZATION METHOD AND DEVICE FOR ITS IMPLEMENTATION - Google Patents

Abstract

1. A clock synchronization method based on the simultaneous reception of noise-like microwave signals from an artificial Earth satellite by spaced ground points, their coherent conversion to a video frequency, digital recording of received signals and determining the time delay of the arrival of the same signal to synchronization points by correlation processing of recorded signals, the magnitude of which produces a comparison of time scales. In this case, at the initial time point t, by the hours of the first point, a noise-like microwave signal is generated using a code sequence, it is recorded at the same point, the generated signal is converted to a frequency ω amplify it by power, the amplified signal is studied in the direction of the artificial Earth repeater satellite, at the same time point t, according to the hours of the second point, using the same code sequence, the same noise-like microwave signal is generated, recorded at the second point, received art on-board equipment of a satellite of the Earth-repeater, the signal at a frequency ω radiates it to the first and second points at a frequency ω with phase relationships preserved, at an arbitrary point in time t by the hours of the second point, a noise-like microwave signal is generated and recorded similarly, the generated signal is converted to frequency ω, amplified by power emit an amplified signal in the direction of the same artificial satellite of the Earth-repeater, at the same time t, according to the hours of the first point, using the same code sequence form the same e noise-like microwave signal, register it at the first point, take on-board

Claims (2)

1. A clock synchronization method based on the simultaneous reception of noise-like microwave signals from an artificial Earth satellite by spaced ground points, their coherent conversion to a video frequency, digital recording of received signals and determining the time delay of the arrival of the same signal to synchronization points by correlation processing of recorded signals, the magnitude of which produces a comparison of time scales. At the same time, at the initial time t ₁ , a noise-like microwave signal is generated using the code sequence using the code sequence, it is recorded at the same point, the generated signal is converted to frequency ω _{1, it is} amplified by power, the amplified signal is studied in the direction of the artificial Earth satellite -retranslyator, at the same time t _1, the clock of the second item with the same code sequence form the same noise-like microwave signal, it is recorded in the second paragraph, taking onboard equipment suit GOVERNMENTAL earth satellite repeater signal at frequency ω ₁ re-emit it at first and second points at the frequency ω ₂ while preserving phase relationships, at an arbitrary time t ₃ by the clock of the second paragraph similarly formed and recorded noise-like microwave signal generated signal is converted to the frequency ω ₁ , amplify it in power, emit an amplified signal in the direction of the same artificial Earth repeater satellite, at the same time t ₃ according to the clock of the first point using the same code sequence of forms they generate the same noise-like microwave signal, register it at the first point, receive a signal at the frequency ω ₁ on-board equipment of the artificial Earth-relay satellite, and reradiate it to the first and second points at the frequency ω ₂ while maintaining phase relationships, the received signal at the frequency ω ₂ they are frequency-converted using the voltage of the second local oscillator phase-shifted by + 90 °, the voltage of the second intermediate frequency is isolated, it is shifted in phase by -90 °, summed with the initial voltage of the second intermediate frequency, per multiplying teachings total voltage with the received signal, allocate the harmonic voltage at frequency ω _r2 of the second local oscillator is detected and it is used to permit further processing of the received signal, characterized in that the resulting total voltage is converted in frequency using the voltage of the first reference frequency ω _E! emit a voltage of the third intermediate frequency ω _pr3 = ω _pr2 + Ω _{D -ω E1} , convert it in frequency using the voltage of the second reference frequency _E2 ω = ωp _P2 -ω _A1 -Ω ₀ where Ω ₀ is the frequency of the stand, which is introduced to determine the sign of the Doppler shift Ω _D , emit a low frequency voltage ω _Н = Ω _Д + Ω ₀ , measure the low frequency ω _Н and depending on whether ω _н > Ω ₀ or ω _Н <Ω ₀ , determine the sign of the Doppler shift, and therefore the direction of the radial velocity of the satellite repeater simultaneously obtained total voltage multiplied with the noise-like microwave signal passed through the regulated delay block, allocate a low-frequency voltage proportional to the correlation function R (τ), where τ - current time delay, changing a time delay τ to obtain equality τ = τ _e, h It corresponds to the maximum value of the correlation function R (τ), and determining its supporting distance from ground station to satellite repeater by the formula $$R=\frac{c{\tau }_E}{2},$$

where c is the propagation velocity of radio waves. 2. A clock synchronization device comprising a geostationary satellite repeater, first and second ground stations, each of which is a local oscillator, a first mixer, the second input of which is connected via a switch to the first output of the pseudo-random signal generator, an amplifier of the first intermediate frequency, a first power amplifier, a duplexer the input-output of which is connected to the transceiver antenna, a second power amplifier, the second mixer, the second input of which is connected through the second local oscillator to the first output of the frequency standard and time menus, the first amplifier of the second intermediate frequency, the adder, the first multiplier, the second input of which is connected to the output of the second power amplifier, a narrow-band filter, an amplitude detector, the key, the input of which is connected to the output of the adder, the second clipper, the second input of which is connected to the second output of the frequency standard and time, a second buffer memory and a meter of delays and their derivatives, the output of which is the output of a ground station, connected in series to the third output of the frequency standard and time nor a pseudo-random signal generator, the first clipper, the second input of which is connected to the second output of the frequency and time standard, and the first buffer storage device, the output of which is connected to the second input of the delay meter and their derivatives, the first phase shifter 90 ° connected in series to the output of the second local oscillator, the third mixer, the second input of which is connected to the output of the second power amplifier, the second amplifier of the second intermediate frequency and the second phase shifter at -90 °, the output of which is connected to the second input ohm of the adder, characterized in that it is equipped with a reference frequency unit, a fourth and fifth mixer, a third intermediate frequency amplifier, a second multiplier, two low-pass filters, an extreme regulator, an adjustable delay unit, and a range indicator and a Doppler frequency meter, and to the channel output a fourth mixer is connected in series, the second input of which is connected to the first output of the reference frequency unit, the amplifier of the third intermediate frequency, the fifth mixer, the second input of which is connected inen with the second output of the reference frequency block, the first low-pass filter and the doppler meter of the reference frequencies, the first low-pass filter and the Doppler frequency meter, the second multiplier, the second low-pass filter, an extremal regulator and an adjustable delay unit, the second input of which is connected with the output of the pseudo-random signal generator, the first output is connected to the second input of the second multiplier, and the second output is connected to the range indicator.