The article deals with the implementation of optimal filtering in the correlation processing of random signals with a priori unknown characteristics of the spectrum. A scheme of the optimal processing device operating in a wide dynamic range of received signals is synthesized, adaptation to which requires the joint use of automatic gain control and automatic bandwidth adjustment.

The article deals with the phase method of direction finding, based on the dependence of the phase difference of the signals received by the antennas, as well as the correlation signal processing in the phase direction finding, which will assess the possibility of signal direction finding of the “Spectrum-RG” spacecraft, derived in the neighborhood of the L2 Lagrange point located at a distance of one and a half million kilometers from Earth.

A new method of correlation signal processing with symmetric heterodination is presented, which is a development of the two-band processing method. The proposed processing method allows you to use all the advantages of two-band processing when receiving signals of any type, from broadband to monochromatic.

The article deals with a new method of phase direction finding of broadband signals with asymmetric spectra. The authors propose a new definition of the signal frequency corresponding to phase measurements in correlation signal processing, such as the correlation-phase frequency.