2010 Issue №4

The new method of processing of the information in location systems is presented. It is based on positions of the theory of optimum reception. As the accepted message dependence of pressure on an exit radar-tracking the receiver from a corner of scanning is used by the diagramme of an orientation of antenna system. Theoretical positions and results of preliminary modeling calculations are resulted. Possibility of increase in the azimuthal permission of two purposes without change of spatial base of a signal is shown.

Obtained the characteristic system of equations of complex geometrical optics for the case of real ray trajectories.

Possibility of application of multi-channel system is considered at construction of free space optics networks.Application of the given method allows to increase effective range of transmission to 1,5 times.

The trunced symbolic equations with any unifrequent oscillatory system allowing with use of characteristics of transistor-capacitor active one-port circuit are received to find a stationary mode and transients in the  generator at presence of sources of noise.

On the basis of the analysis of principles of antennas’ placing the way of their mutual resistance’s definition taken as a principle the developed device is developed. Introduction of a quantitative estimation of electromagnetic conditions on the basis of an establishment of mutual resistance’s values will allow to solve a problem of electromagnetic compatibility of radio-electronic means.

In this work some conditions allows to increase of the indirect nuclear quadrupole resonance are investigated. The proposed method based on the stochastic resonance phenomena in the input electronic circuits of spectrometer. This effect allows provide the essential raise of the signal-to-noise ratio.

Magnetiс—resonance properties of Fe3O4 thin films with sublayer Fe on МgO and on Si/SiO2 substrates have been investigated. The magnetic properties strengthening was established. This fact gives hope of success using of such structure as magnetic tunneling junction.

In the present paper we focused our attention on problems of property variable of materials by interstitial impurity-induced perturbation of regular structure. This problem may be solve by NMR study of quadrupolar nuclear, that is probe of electronic environment of guest atom embedded in a host lattice. The study of evolution of coherences of quadrupolar nuclear with spin S = 3/2 in the presence anisotropy chemical shift is shown that interference terms between time dependent quadrupolar interaction and anisotropy chemical shift are induce dynamic shifts of satellites and difference broadening line of its. The extraction of Q-CSA interference terms from NMR experimental data give us not only tensor parameters but the information about a location of tensor principal axes.

The effect of absorption on the formation of ray trajectories and heterogeneity of the structure of propagating waves is studied. Numerical calculations of the ray trajectories are performed.

The denoising method of the pulse nuclear quadrupole resonance (NQR) signals was investigated for the case of the small signal to noise ratio. The maximum entropy method of the autoregressive model was applied for the analysis of the experimental NQR data. The obtained results show the efficiency of proposed method in the conditions of the limited sampling rate for the limited time of the detection and digital signal sampling for the NQR detectors.

On the basis of a method of the maximal credibility considers questions limiting accuracy parameters of a signal and the sanction on range at approach of the purpose a locator. It is shown, that due to increase of the attitude the signal/noise essentially increases an opportunity of the sanction of the radio impulses reflected from the purpose. The supersanction on range is provided with a method of the maximal credibility.