S. F. Teslevich, A. B. Makhetov

VHF range incorporates high frequency using and a great number of both fixed and mobile radio sources. Both analogue and digital signals with complex kinds of modulation are used for data transmission. For hiding the communicated information a variety of encryption modes is utilized in communications systems, resulting in a priori uncertainties of radio monitoring means in regard to one or another communication sys-tem. Under the circumstances the role of a radio sources position finding system has increased greatly. Its accuracy depends on the accuracy of measurement of radio signal coordinate-informative parameter. The article proposes an algorithm for this measure-ment, which allows more precise assessment of a radio signal phase difference with low signal to noise radio.