Method of probability assessment of the stability of clock generators of satellite telecommunications systems from the influence of ionizing radiation

DOI: 10.31673/2412-4338.2020.035566

Abstract

The operation of satellite telecommunications systems is characterized by the influence of a number of disturbances and noise on their work. Namely, additive fluctuation noise, perturbation of useful angular modulation (in the case of carrier frequency filtering), phase and frequency jumps and others. Along with the external impact on the quality of these systems can have internal disturbances, the main of which in the phase-coherent systems of synchronization of satellite telecommunications are the instability of clock generators. This paper directly considers one of the issues of ensuring the process of maintaining the set values of the operating parameters of the clock generator under the influence of ionizing radiation of outer space - the radiation resistance of clock generators. It is established that ensuring the radiation resistance of clock generators of these systems requires a preliminary assessment of their production batches in order to establish the probability of providing the specified values of operating parameters of these generators when operating under ionizing radiation of outer space. To assess the radiation resistance of production batches of clock generators, it is proposed to apply a probabilistic approach, which involves establishing the probability of maintaining the specified parameters of clock generators under the influence of ionizing radiation of outer space. To solve the problem of estimating the radiation stability of production batches of clock generators, an algorithm based on the probabilistic approach is developed and proposed and the value of the probability of maintaining the operating parameters of clock generators under the influence of ionizing radiation of outer space is obtained.

Keywords: carrier frequency synchronization system, phase instability of the clock generator, estimation of radiation resistance, ionizing radiation of outer space.

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