EFFECTIVENESS OF INFORMATION TRANSMISSION BY TWO-SYMBOLS ENSEMBLE IN SIMPLEX COMMUNICATION SYSTEMS ON THE BASIS OF TSC

Abstract

The theory of electrical communication provides transmission of two types of information (messages): continuous messages and discrete. Continuous messages are characterized by an infinite number of their values on a finite time interval. An example of such a message may be the value of a quantity of the direction power of the microphone output: the greater the resolving power of the measuring device, the more different voltage values. Discrete messages (as opposed to continuous ones) are characterized by a finite number of values over an infinite time interval. For example, several volumes of a work of art have a finite number of characters (letters) that must be transferred. Advantages of digital methods of display, processing, transmission, accumulation and storage of information provide them with the primary use. Actually, various methods of digital conversion are used to increase the speed of information transfer - particularly, information compression. In this article were researched the efficiency of information transmission by two-character ensembles in simplex systems based on timed signal constructions. Timer coding, as opposed to positional, in which the information of the transmitted symbol is determined by the type of signal on the nyquist interval, keeps stored information in the length of several separate time segments of the signal tci and their mutual position. In this case, the duration of each of the signal segments is not less than the nyquist interval: t ci = t 0 + zD . Comparison of information parameters of two-character ensembles at positional and time coding had been made. Determined the information capacity of the nayquist element and the influence of the number of redundant elements ( r = n - m ) on entropy of the message at positional block coding. Optimal parameters of timed signal constructions for the code set affecting power were determined. Timer signal constructions are proposed as a code summarization mechanism, which provides transmission of information about the state of more than two sources in one codeword.