Supervisors info:
Αριστείδης Τσίπουρας, Ειδικό Διδακτικό Προσωπικό, Τμήμα Πληροφορικής και Τηλεπικοινωνιών, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Summary:
RF Spectrum is a valuable, natural resource for wireless communications. Ensuring the coexistence of different radiocommunication networks, without interfering with each other is essential, and is achieved through efficient spectrum management. The sensing mechanism of spectrum management is spectrum monitoring, which with various techniques ensures compliance with technical parameters and standards for radio communication systems, in non-optimal situations and unknown environment.
The International Telecommunications Union (ITU) has developed a series of guidelines addressed to the spectrum monitoring authorities, that cover in detail all the techniques, activities, equipment and methodologies for developing spectrum monitoring networks. The purpose of this work is initially the indexing of these instructions, with emphasis on the processes of design of spectrum monitoring and geolocation networks, and in the second phase, their application to design and evaluate the performance of a spectrum monitoring and geolocation network in the Prefecture of Attica.
Thus, in the first part of the work, the objectives and activities of spectrum monitoring, the direction detection of an emitted signal and the geolocation of unwanted emissions are analyzed. In addition, the spectrum monitoring and geolocation networks are analyzed in terms of entities, functions, geographical reference system, communication system and standard specifications, while an extensive description of the development methodology of such networks is given, with emphasis on optimizing their performance, in terms of geolocation of emissions using Angle of Arrival (AOA), Time Difference of Arrival (TDOA) and Hybrid AOA (TDOA) techniques.
The second part of the work describes the design of a hybrid spectrum monitoring and geolocation network for the Prefecture of Attica, according to the techniques described in the first part, utilizing the possibilities offered by the spectrum-E spectrum management computing platform. Then, the optimal scenario of installation locations and technology of the surveillance and geolocation stations is presented, based on the morphology of the Prefecture and the already existing E/M emissions. Followingly, the results of the radio coverage and mapping studies of the location accuracy for the proposed network are presented.
Finally, the third part of the work includes the conclusions of the studies, regarding the coverage percentages, the areas of special spectral interest, the future development of the network and of course the achievement of objectives set before the study.
Keywords:
spectrum monitoring, interference, geolocation, dimensioning, optimization
