D.I. Popov - Dr. Sc. (Eng.), Professor, Ryazan State Radio Engineering University. E-mail: adop@mail.ru

In the article the optimum algorithms of multifrequency radar signals detection on a background of correlated and non-correlated noise are synthesized. The statistical model of multifrequency signals and noise is given. A signal and noise it are represented by narrow-band casual processes Gaussian type statistically independent in the frequency channels, and are described to within correlation matrixes parameters of processed sample Gaussian in joint density of probability. The algorithm of optimum detection of multifrequency signal frequency components is determined by calculation of the likelihood ratio resulting to deciding statistics, in which basis the algorithm of an optimum linear filtration lays. The overcoming a priori uncertainty of correlated (passive) noise parameters is based on adaptive Bayes approach, according to which the unknown values in the synthesized algorithm are replaced with their solvent estimations that result in adaptive algorithms. The synthesized algorithms of optimum detection of multifrequency radar signals on a background of passive noise assume their separate realization in everyone frequency the channel on the basis of the adaptive matrix filter and not adaptive multichannel filter which is carrying out discrete Fourier transform of weighed results of matrix processing. The adaptation of the matrix filter allows overcoming a problem a priori uncertainty of the noise correlation characteristics. The decision on presence of a signal is accepted separately in Doppler channels of the everyone frequency channel by results of comparison with detection threshold levels of output deciding statistics. The synthesized algorithms in special cases converge to known algorithms, that prove to be true their reliability. The analysis of the synthesized algorithms of multifrequency signals detection on a background of correlated and non-correlated noise is carried out. The optimum number of frequency channels is established, at which the prize in comparison with one-frequency a signal allows in appropriate way to reduce radiate total power of multi-frequency signal or at same radiate power to increase of detection target range. The presence of the established prizes confirms expediency of separate coherent processing of multifrequency signals. Use of multifrequency signals results in increase of moving target detection efficiency in comparison with use one-frequency signals of that type.