This article considers methodical approach for synthesis of complex avionics of long-range UAV. The suggested approach differs from traditional one by close loop link for formation requirements for new components of avionics of long-range UAV. The principles of engineering will be useful for creation of perspective types of long-range and middle-range UAV.

The analysis of customer requirements of on-board computer designed for small-size multifunction radar is carried out and technical requirements for the onboard computer are presented. Applicability of domestic microprocessors used in onboard computer is evaluated. Digital computer architecture and design are presented.

The subjects of this paper are both architecture and algorithms of on-board unmanned flying vehicle of integrated navigation system. The main task of the system mentioned is high accuracy positioning of on-board multipurpose radar antenna’s phase center in order to implement the so called cartography mode of radar operation. It is necessary for producing high resolution radar images. The high accurate positioning of on-board antenna’s phase center is provided due to refinement of on-board integrated GNSS-aided inertial navigation system output data via usage of vehicle velocity measurements, generated by on-board radar simultaneously with radar images. The simulation results presented in this paper confirm the prospects of this approach for flying vehicle.

In this paper, the basic principles of high-speed, anti-interference, secretive radio channels are considered. These channels are used in the command and information interaction system between moving objects and the command control center while data processing, in general, from the diverse means of deployment on sea-based, land-based, air-based carriers. The question of creating, on the basis of high-speed channel, secretive radio control channel on the basis of direct spectrum spreading is investigated. Channel basis is a high-speed anti-interference modem with adaptation function to existing conditions and management tasks. Modem is implemented on the basis of high-performance software-defined platform using FPGA.

In this paper, maximum attainable parameters of a low-speed radio channel for moving objects control: data transfer rate, range, stealth in a multipath environment are investigated. The level of secrecy about -40 dB at distances up to 100 km at a bit error rate of 10-6 is achieved for the DQPSK modulation and Reed-Solomon code (63,32,6). In this case the power of the transmitter is 10 dBm and bitrate is 1000 bps. Spectrum spreading is implemented by a method based on two M-sequences. Attainability of the declared parameters is confirmed experimentally at HIL-system and in full-scale tests with unmanned aircraft. In full-scale tests of an experimental sample, a series of studies were developed for choosing the most effective antenna devices, with the marginal performance for transmitter and receiver located on the ground, and for a transmitter located on board. A series of studies of the experimental sample on specialized equipment approving the required parameters for stealth were performed. Established landfill equipment has recorded signals at distances not exceeding 1000 m.

The technology of creating a coherent multistatic coherent electronic warfare with active noise interference is considered in this paper. Simulation is carried out and the results meeting the requirements of a real product are obtained.

The perspective directions of information technologies on the basis of dynamic chaos for transmission, processing, storage and information security are considered. The broadband systems of information transmission using the complex signals with big base constructed on the basis of systems with chaotic dynamics are presented. It is shown that on the basis of the developed coding finite-dimensional mathematical chaotic algorithms the digital telecommunication system with spread spectrum and dynamic change of chaotic codes possesses high noise immunity, security, electromagnetic compatibility and provides reliable and confidential transmission of messages in the conditions of a difficult electromagnetic situation.

In the article, the task of tracking a flying object with fixed ground-based radar is considered. The mathematical model of the tracking system is presented. The transfer function of the tracking system is obtained. The tracking errors in azimuth and elevation are defined. The relationship between the error function form and the second derivative of the input exposure is given.

Analytical formalization of synthesis problem of weight distribution and its solution aimed at improving the quality of spectral parameters estimation of the target signal on the background of correlated noise located in the frequency domain is provided in this paper.

In this article, the noise models of nonrecursive digital filters (NDF) with nonrecursive lateral feedbacks (NLFBs) are presented. The models of four typical schemes NDF with NLFBs taking into account the effects of quantization in the individual nodes of nonrecursive digital filters and rounding errors are considered. «Noise equations» for the noise dispersion at the output of each channel from analog-to-digital converters (ADCs) and multipliers for each of the schemes NDF with NLFBs are obtained. A comparative analysis of noise models for each scheme implementation of NDF with NLFBs is conducted. The noise models presented can find wide application in technologies of radiolocation, navigation and communication.

This article considers the technique for determining the areas of guaranteed detection of air targets via reflected signals from these external sources with passive-active radar systems. The technique, in contrast to the known approaches, takes into account the impact of the main signal illumination, operating conditions of passive-active systems and its transceiver modules as well as other factors thereby providing improved accuracy for calculating the boundary coordinates of the airspace control zone.

The article considers conventional DBF approach and broadband DBF. DBF on FIR-filter is the obvious way of forming a time delay at the same time, requiring significant computing power. Less expensive computing DBF with the rotation phase at a nonzero frequency is considered.

In this paper, problems of creation a multi-function radar system are defined. A variant of its construction based on reconfigurable digital platform is considered. The possibilities of implementation of non-traditional methods of location on the basis of the perspective multifunction radar system are shown and its composition is proved.

Experimental study of microwave imaging technique application for complex composite target identification is considered. X-band fully polarimetric radar processing is performed for the problem of maneuvering group target localization including individual target (within the group), its size and relative position estimation.

The results of numerical three-dimensional electrodynamic simulation demonstrating the possibility of detection and distinction of non-uniformity limits by means of X-range radar station subsurface sensing with the possibility of raiated signal polarization control are presented. Attenuation dependence of the reflected signal on forest cover density is investigated and the possibility of non-uniformity delimitation is identified.

The overview considers methods of subsurface radar sensing to detect buried plastic landmines. The most common types of mines and their electrical parameters are presented. All systems achieve the probability of detecting plastic mines 0.9 with a high level of false alarm rate.

In this paper, the results of experimental research of moving targets signal extraction by background radar are analyzed. The background method and its physical interpretation are described. An example of full-scale background radar signals simulation based on a permanent echo is given. It is shown that a detection device based on “track-before-detect” (TBD) may be used for background radar.

In this paper, the types of terahertz detectors are described. A physical model of the locator sensor receiving device, on which basis, high photosensitivity and photocurrent long-term relaxation associated with the electrons capture by the traps, as well as sensitivity in broad band terahertz range due to optical transitions from levels with different excitation energy is developed. Problems of the integrated receiver development based on PbSnTeIn films produced by molecular beam epitaxy on silicon substrates through the buffer layers calcium fluoride and barium while generating multiplexers are considered. On the basis of calculated and experimental data, noise-equivalent power and receiver prospects were evaluated.

Antenna modules technologies prospects in accordance with Johnson criterion are considered. The result of terahertz antenna simulation in CST MWS program considered optimal from the authors’ point of view is presented. Model parameters and experimental data are compared.

The feasibility of Novosibirsk free electron laser (NovoFEL) as a radiation source in a special installation designed for the measurement of radar cross-section (RCS) of scaled threedimensional objects to obtain RSC of the objects in GHz frequency range is considered. Experimental radar cross-sections of various models are presented.

In the article, the question of suppression of acoustic noise generated at the input of the microphone system is considered. The variants of the differential microphone arrays geometry which can be used to improve the parameters of the system are shown. Differences in signal processing, and performance, advantages, and disadvantages of the systems are presented.