Bakhtiyarov D. Method of increasing the efficiency of using radio devices for monitoring the electromagnetic environment in urban environments

The dissertation is devoted to the decision of the actual scientific and applied problem which consists in the development of a method of definition of levels of the basic and secondary electromagnetic radiations in the urban environments at the expense of perfection of models of their distribution. The necessity in the increased efficiency of use of devices of monitoring of an electromagnetic situation on the basis of the analysis of features of distribution of electromagnetic radiations in the urban environment and lacks of the existing mathematical device for their description is proved. The structure of the experimental setup is proposed and the peculiarities of propagation of main and secondary electromagnetic radiations in the urban environment are studied, the nature of their propagation is predicted on the example of COST231Milti-Wall-Model. The nature of the interference and the distance in real operating conditions and the corresponding graphical and mathematical dependences were obtained, which formed the basis of the method of improving the models of electromagnetic radiation propagation. Scientific methods of synthesis of the detailed structural scheme of processes of detection and localization of uncontrolled and unlicensed devices of information transmission on radio channels, including development of the software for definition of a zone of electromagnetic accessibility indoors are substantiated. An original approach, algorithm of functioning and methods of synthesis of search means in the conditions of radio interference and detection of sources of electromagnetic radiation are developed. To solve the problem in the dissertation the following tasks have been set and solved: – the necessity in the increased efficiency of use of devices of monitoring of an electromagnetic situation on the basis of the analysis of features of distribution of electromagnetic radiations in the urban environment and lacks of the existing mathematical approach for their description is proved. – has been created the model for estimating the energy characteristics of signals at the observation point based on experimental studies of electromagnetic radiation attenuation depending on the frequency, nature of interference and distance in real operating conditions, for obtaining graphical and mathematical dependences. Has been developed method for improving radio wave propagation models (on the example of the COST 231 MWM). – development of a method for detection and localization of uncontrolled and unlicensed devices for transmitting information on the radio channel in a complex interfering and electromagnetic environment inside a dedicated room of the electromagnetic availability zone and development of a detailed structure of this process. – development of software that will determine the perimeter of the electromagnetic availability zone on the basis of the obtained mathematical apparatus for the purposes of monitoring the electromagnetic environment indoors and information security. – conducting experimental verification of the obtained results to assess the peculiarities of the propagation of main and secondary electromagnetic radiation in the urban environment, predicting the nature of their distribution in applied models of COST 231 MWM, based on the results, evaluated by viewing and creating semantic information about side electromagnetic radiation and pickup.