The clarification of the concept of information only slightly supplements the intuitive understanding of this term and does not provide anything for the construction of a quantitative theory of information that could be used in solving engineering problems. For such a theory, it is necessary to introduce an "operational" definition of this concept, which is based on an indication of the measurement method. To estimate the amount of information received, it is necessary to find a measure of the uncertainty of a particular situation. When transmitting information over a distance, at the output of the transmitting converter there is a finite system of signals that unambiguously correspond to the symbols and form the input alphabet of the communication channel. At the output of the receiving device, there is a finite system of signals that form the output alphabet of the communication channel. The process of transmitting information consists in selecting chips, sending them over the communication line and making a decision on the transmitted signal based on the received chip. It is obvious that the extraction of information about signals from signals is associated with the representati
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