Abstract
The problem of evaluating the quality of digital channels of satellite communication systems (DCSCS) is considered. It is shown that two quality assessment strategies are used in practice: the first is an assessment of quality from the position of consumers of services and specialists in the provision of communication services in the market; the second is an assessment of quality from the position of specialists in technical operation. It is concluded that the first strategy does not allow to identify the degradation of DCSCS quality. It is suggested that it is advisable to use the second strategy. A reasonable choice of particular quality indicators was made: error probability, jitter and phase drift, slippage, signal transmission delay, reliability, relative transmission rate, energy reserve, error vector modulus. A quality assessment criterion is proposed that forms three possible outcomes: satisfactory quality, marginal quality, and unsatisfactory quality. A single integral indicator is proposed, formed on the basis of particular quality indicators and fuzzy logical inference. The structure of a fuzzy expert quality assessment system is considered. An illustrative example is given.
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