Software and hardware complexes for multistage monitoring of mobile radio signals and features of their operating modes

Today, technical means of radio interception, monitoring and direction finding in mobile radio communication networks are implemented in the form of software and hardware complexes, the most important performance indicators of which are considered to be speed, detection accuracy and probability of recognition of mobile radio communication means with their information content. However, the effectiveness of these complexes still remains problematic and requires further development of methods and techniques for searching and detecting signals of mobile radio communications in both frequency and time environments of telecommunication channels and their subsequent information processing. To solve this problematic issue, the authors consider a typical variant of the structural scheme of the software and hardware complex for searching and detecting signals and the peculiarities of applying the procedures for multi-stage search and detection of signals in radio monitoring of radio sources of mobile communication systems. It is shown that software and hardware systems can have several modes of operation depending on the type of control channel. The article also presents the results of calculations of the probability of successful completion of the search for a signal of a distributed control channel of mobile radio communications for a given time with three stages of detection in the frequency-time domain with one radio receiving device at a different number of empty channels (p = 1, 5, 9) in one search cycle. It is shown thatadditional estimation of the input signal level by the radio receiving device at the first stage of detection increases the search efficiency with an increase in the number of empty channels.