CASPIAN JOURNAL

MANAGEMENT AND HIGH TECHNOLOGIES

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Volovach Vladimir I.  // Caspian journal : management and high technologies. — 2012. — №1. — pp. 13-20.

Volovach Vladimir I. - Cand. Tech. Sci., the Managing chair the information and electronic service, Volga region state university of service, 445677, Tolyatti, GSP, Gagarin’s street, 4, ssunrise@mail.ru.

In article the noise stability of radio engineering devices of the protection using various methods of detection is considered. Necessity of such analysis is connected with dependence of reliability of detection of objects on a noise stability of such devices. In article definition of a noise stability of radio engineering devices of protection is made. It is shown that the hindrance makes essential impact on the decision of a problem of detection as for a case of the determined sig-cash reflected from object, and in case of detection of signals with casual parameters. The hindrance concerning an accepted signal can be presented in the form of the sum of inphase and orthogonal components that allows to realize methods of coherent and not coherent detection. The expressions describing excess of a signal over a hindrance for both methods of detection are resulted. It is shown that a method preferable to use from the point of view of a noise stability irrespective of structural realization of the device of protection is coherent detection. The greatest prize in a noise stability allows to receive coherent detection at considerable sizes of an indicator of an optimality of detection of the device. It is noticed that the maximum prize in capacity of a signal at coherent detection decreases at reduction of probability of wrong detection of the signal reflected from object. The indicator of a quantitative estimation of a noise stability of radio engineering devices of protection is entered.

Key words: the radio engineering device of detection,a noise stability,coherent and not coherent detection,an indicator of an optimality of detection