The Phase Synchronization of Reference Oscillators Through Atmospheric Channel

Abstract

The theoretical modeling of transferring of initial phase of low frequency oscillations with modulation of carrier with separate high frequency link from one part to another is presented. The main goal of this modeling is the determination of influence of separate high frequency link phase stability on phase stability of low frequency oscillations in a reception point.

Investigation of synchronization system in a framework of measurements of microwave phase progression on a opened links

“…To solve this problem the radio wave propagation channel with the additive amplitude and phase noises was simulated. For the analysis of work of phase-locked loop system it assumes the use of the next block-diagram of equipment of oscillator's synchronization through atmospheric channel [2], which is presented in Fig.2. On the Fig.…”

“…Then we carry out measurements of phase difference of two low frequency oscillations and adequately represent the microwave phase progression fluctuations. In the paper [2] it was described the method of transferring of initial phase of low frequency oscillations from one part of testing link to another by means of frequency modulation.…”

Estimation of an error on phase progression measurement on microwave line-of-sight link

“…That can be solved by the use of low-frequencies of electromagnetic waves or by modulation of radiofrequency electromagnetic wave with low-frequencies oscillations. If the testing link length is comparable with the low-frequencies wavelength the channel is characterized by the phase stability [1]. In addition, it is necessary to transfer the initial phase of the low-frequencies in-phase oscillations into the microwave band both for the receiving and transmitting parts of the link that allows obtaining microwave oscillations with the same initial phases and the phase differences due to microwave propagation.…”