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A wide class of modern aircrafts uses onboard radio navigation systems of coherent-pulse type to ensure terrain-following flight, the detection of radiation of which expands the capabilities of radar facilities. The main difficulties in this case are the need to use an energy detector, due to the lack of a priori information about radiation characteristics, and low efficiency of radiometric technique in detecting low-power signals of onboard coherent-pulse type radio electronic means when they are emitted from distances corresponding to the boundaries of line of sight, because of insufficient signal-to-noise ratio at the input of the decision-making device. In this work, a technique of dual spectral analysis and weighted processing of quasi-continuous signals in the absence of a priori information about their parameters is proposed. It has been demonstrated that the proposed technique allows for the required detection characteristics achievement at fixed values of the conditional probability of false alarm. Evaluation of the developed technique efficiency was carried out on a simulation model in the Matlab application program package. The use of quasi-optimal processing of quasi-continuous regular radio impulse trains increase the signal-to-noise ratio of the decision-making device compared to an energy detector and hence extends the aircraft detection range.
Roman V. Smolin
Yaroslavl Higher Military Institute of the Air Defense of the Ministry of Defense of the Russian Federation, Russia, 150001, Yaroslavl, Moskovsky ave., 28
Ivan A. Balandin
Yaroslavl Higher Military Institute of the Air Defense of the Ministry of Defense of the Russian Federation, Russia, 150001, Yaroslavl, Moskovsky ave., 28
Evgeny E. Andryushchenkov
Yaroslavl Higher Military Institute of the Air Defense of the Ministry of Defense of the Russian Federation, Russia, 150001, Yaroslavl, Moskovsky ave., 28

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