M.T. Baldytchev – Ph.D. (Eng.), Associate Professor, Cherepovets Higher Military Engineering School of Radio Electronics

A.B. Talalaev – Dr.Sc. (Eng.), Professor, JSC «RTIS VKO» (Tver)

D.A. Timakov – Ph.D. (Eng.), Associate Professor, JSC «RTIS VKO» (Tver)

I.V. Chebotar – Ph.D. (Eng.), Cherepovets Higher Military Engineering School of Radio Electronics E-mail: cvviur2@mil.ru

It is shown that the use of modern passively-active systems increases the efficiency of airspace control and reduces its cost. The presents a general description of the principles of the functioning of passively active radar systems, as well as a variant of multichannel signal processing in such systems, which makes it possible to use the field of illumination produced by various sources of radio emissions with greater efficiency. In the course of the conducted researches it was established that the main problem with multichannel processing is the elimination of ambiguity caused by the dif-ferent arrival times of reflected signals from one object, formed by  diffused on the ground transmitting masts of television and radio broadcasting, as well as a different frequency of Doppler. Ways to reduce the influence of these factors based on multichannel parallel digital signal processing represented in quadrature form.

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