Vector analyzers of signals for improving methods of search of means of output receiving of information

DOI: 10.31673/2412-4338.2019.015561

Abstract

The article briefly discusses the development trends of the means of secretly collecting information.  The main of them are the use of more and more entangled algorithms for hiding the radiation of digital radio bookmarks, special masking methods are used, a channel can be created for retrieving information under the cover of radiation of legal radio tools working near the object that interfere with the search technology.  The next important factor is the continuation of the use of radio frequencies for communication, data transmission, and various control commands.  Almost the entire radio frequency range is involved in the work of legal radio transmitters.  This causes significant complications of the radio broadcasting environment, to identify digital radio tabs in such conditions is extremely difficult.  To do this without the use of special tools for analyzing digital packets in real time is impossible. A vector analyzer has been proposed as a special measuring tool in order to improve the technique of detecting digital radio bookmarks.  The choice is based on a detailed analysis of the technical characteristics and principles of the analyzer.  It is noted that in the frequency domain for the study of the radio signal, measuring its level and carrier frequencies, two types of spectrum analyzers are used: serial and parallel spectrum analyzers.

An important advantage of parallel analysis as compared to sequential is a relative increase in the speed of spectrum construction, which becomes especially significant with small analysis bands. Attention is drawn to the fact that spectrum analysis is an important, but not the only procedure that is used to identify and study signals in radio monitoring systems.  It is very important now to analyze changes in the parameters of a radio signal over time.  It is this ability to work vector analyzer and laid in the improvement of the search method of digital radio tabs operating in pulsed mode.

For each frequency band selected on the spectrogram, the vector analyzer can simultaneously display its spectrum, time or vector diagram.  This allows you to find the moments of the appearance and end of the transmission of a pulsed short-term signal, determine the transmission intervals from the spectrum, recognize the type of modulation and, based on the data received, perform an analysis and determine the radio signal origin with a high probability.  It is shown that the vector analyzer is a powerful tool for studying and measuring the characteristics of radio signals in the entire frequency range used from a few kHz to tens and hundreds of GHz.  The use of vector analyzers allows, in particular, to solve the serious problems of detecting signals from modern digital means of secretly picking up information using time and code division channels, pseudo-random frequency tuning, multipositional-phase-amplitude modulation and other promising methods of information transfer.

Keywords: vector analyzers, digital packet analysis, spectrum, radio signal parameters in time, transmission intervals.

References

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