RECOVERYING FORM OF THE SCATTERING SOURCE WHOSE FIELD IS DISTORTED BY THE NOISE
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2017, Vol 874, Issue 2017
Abstract
Scattering signals is one of the basic natural processes, which is a consequence of energy losses and manifests in the form of variety of radiation what propagating in space. The cause of the scattering signal is the interaction with the environment. The result of this interaction is not only scattering but also weakening the signal. On the one hand scattering is considered as a negative effect, but on the other – as a possible way for finding form of the scatterer of the signal. Measuring the scattered field has a great practical importance, because the power of scattered field is usually much less than the power of field of the original signal. Moreover in the real condition always is present noise including the noise of the measuring devices. In the paper we explored the problem of recovering form of the scattering source in the uniform environment. The input data of this problem is the information about a set of receivers and the measured scattering field distorted by the noise. We showed solving of this problem needs to recover the function of two variables for its radon image. The scientific novelty lies in the fact that unlike the known methods of restoring the form of the source of18 scattering, a new approach is proposed in the work, in which it is not necessary to know the information about the distant field, as well as the coordinate and the angle at which the source of the signal relative to the receiver system is located. For the proposed method established the dependence of the precision noise from the angle of rotation system receivers.
Authors and Affiliations
Bohdan Rusyn, Liudmyla Kasperska
CHANNEL SELECTION ALGORITHMS PERFORMANCE EVALUATION FOR SPECTRUM DECISION IN COGNITIVE RADIO
Different spectrum decision methods in a Cognitive radio network were analyzed in this paper. The technology of Cognitive Radio networks needs to make a decision which spectrum band is the best among the available free b...
INDUCTION MAGNETOMETERS CONNECTION SCHEMES AND BASIC CALCULATION EXPRESSIONS
In article “Schemes of enabling and the basic calculated ratio of induction magnetometers (IM)” is considered the basic principle of IM operation and the basic scheme of it’s enabling. Analyzed frequency response of IM....
COMPUTER NETWORK RELIABILITY ANALYSIS BASED ON BINARY DECISION DIAGRAM
The present paper is aimed at investigating modelling and analysis techniques for the calculating the reliability of computer communication network using binary decision diagram. The network can be represented in a form...
CRYSTAL STRUCRURE OF THE MIXED RARE EARTH FERRITES Pr0,5R0,5FeO3 (R = Nd, Gd, Tb, Dy, Ho)
The work deals with the study of the phase composition and crystal structure of new mixed ferrites Pr0,5R0,5FeO3 (R = Nd, Gd, Tb, Dy, Ho) obtained by solid state reactions technique. It was established that all samples s...
Flicker-noise spectroscopy method
Method of determining the processes that take place inside the investigated system is presented here. Method is based on the analysis of energy spectrum of investigated system own noises. Using energy spectrum of own noi...