Nefedov

pp. 41-65

pp. 301-324

pp. 325-343

pp. 1-12

pp. 68-78

pp. 560-572

pp. 633-644

Comparative analysis of integral conversions relatively to the optimal distributed signal processing was presented. The coefficient of integral conversion efficiency was introduced. Fourier transform, wavelet transform and convolution in the system of standard functions were compared when single and group signal processing.

Technological abilities of shared center for research and testing of microminiature high-frequency and broadband special electronic equipment assembly and mounting technological processes were considered in the article. Working conditions and examples of technological processes of micro-assemblies development and mounting were described. Perspectives for the development of this center and for the entire sphere were shown.

The author considers a conception of minimal parametric modelling in high-quality radar signal processing. Convolution transform in reference functions system is given as base integral transform of the proposed conception of minimal parametric modeling. Basic requirements for minimal parametric signal model and phono-target situation are discussed.

           The article considers features of the interference pattern of resolution bin in surveillance spatial coherent MIMO radar system with respect to baseline lengths of the interferometer and the number of radar stations in the interferometer. The authors provide a strategy of surveillance coherent MIMO radar system interference pattern of spatial bin construction.

In this article methods of range measurement between two points of local positioning system. General overview of positioning problem in conditions of multipath was presented. Model of equipment for investigation of diverse radio system positioning accuracy was proposed. Experiment for investigation of positioning accuracy and method for determining the distance using the experimental data were described. The results of experimental estimation of accuracy when measuring the distance between elements for different types of tracks were included in the article.

Radar station created in BMSTU (RDE RET) that allows to get the images of low-orbit spacecrafts and working in the millimeter-wave band was considered in this article. Created radar station is an interesting researching tool, allowing to breakthrough in the sphere of creating algorithms and methods for taking radar pictures of aircrafts and their high-accuracy detection; it also provides tools for research of millimeter-wave propagation at the Earth-Space path.   

Principles of creating the distance-azimuthal radar pictures of targets in radars with inverse aperture synthesis, based on classic spectral analysis. Algorithm for localizing data processing when monitoring aircraft moving along the straight-line trajectory was developed. The results of distance-azimuthal radar picture simulation based on facet model and point model were presented in the article.

This article is devoted to the method for increasing of radar energy efficiency at the expense of using the pulse envelope with non-rectangle form. Construction schemes of solid-state pulse transmitting radar devices were presented; they provide forming of  pulse envelope with non-rectangle form, keeping high energy efficiency. The aspects of thermal conditions and the problems of output cascade reliability were considered. The analysis of energy saved during the radar operation with different types of radio signals was presented.

Approach to the design of solid-state transmitting devices with high unti power, based on continuous optimization of transmission path’s units in order to achieve the maximum possible mass-dimensional attributes, was considered in this article.Ability to increas pulse power from one semicondactor device was demonstrated. The results of experimental research of very high frequency amplifiers were presented.

Generalized algorithms of data processing in radars with spacecraft tracking system were considered in this article. The stage-by-stage approach to data processing and algorithms for detecting and tracking of targets were considered by the example of radar system with millimeter-wave band, designed to take radar pictures of spacecrafts. The choice of probing signals for considered radar system was determined.

The author proposes a technique for building high resolution ISAR image using prior information about type and geometry of the target based on minimal-parametric simulation. Limits of usage are estimated and results of mathematical simulation are given.

 This paper covers the question of parameter selection for continuous phase modulation with Gaussian filtration for obtaining appropriate characteristics in noise immunity and spectral properties. The authors present a method of parameter selection. The results enable to select appropriate parameters of continuous phase modulation.

The new method of estimation of the decision-making process based on usage of heterogeneous information sources is proposed in this article. The results of mathematical simulation of this method are analyzed.

This article deals with the synthesis of clarifying targeting algorithms in radar systems  with millimeter waves and beam antennas, used for detecting low earth orbit satellites. The synthesis of the clarifying algorithm is carried out using the prior information about target trajectory, and also considers the constrained beam movement trajectory of real systems.

The article describes development of multipurpose software package for computer simulation which allows to objectively evaluate the effectiveness of any technical solution used in radars. The authors consider a structural scheme of the developed software and its components and describe the results of a simple simulation.

In this article the results of experimental research works of composing data bank of  radar pictures for different target types in millimeter wave range. The comparative analysis of produced radar pictures depending on angle of the object and wavelength range is included. To solve the detecting and recognizing problems, the possibility of using the oscillating components from Doppler’s images of targets was considered.  

The method of choice of efficient working frequency range for space vehicle imaging radar is discussed. Developed imaging radars are considered. Calculation relations of finding efficient working frequency based on criterion of equal potential are developed. The result is that frequency range 8 mm is best suited for solution of the this problem.

The author proposes a method of increasing radioimage contrast on the basis of minimal-parametric modelling. This method allows to increase overall performance of space vehicle imaging radar RLS RV (MGTU). Results of simulation and comparison of basic image building method with the proposed method are given.