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This paper considers the problem of forming formal statements regarding the formal parameters of binary code sequences, mathematical model transformations, their properties and the order of operations while optimizing the sequence on the criteria of minimal side lobes. The results of modeling are shown as a group of optimized binary code sequences.
Approach to development of calculation methods of passive microstrip devices with symmetric structure based on the input impedances of partial schemes received by use of even-odd excitation of symmetric multiport are offered in the work. The expressions relating the input impedances of partial schemes of the transforming four-pole circuit and the directional four-port circuit with their scattering...
The paper considers increasing of the multispectral images resolution using arithmetic combinations based on the Brovey transform method to improve segmentation of multispectral images by k-means clustering algorithm.
This paper presents the application of equivalent replacement method for the development of dual-band microwave power distribution devices with arbitrary power division ratio in different frequency bands. The expressions allowing to replace with the equivalent circuits of T-type and P-type a transmission line segment having a different values of characteristic impedance and electrical length at different...
In this paper, the different algorithms of contrast and brightness improvement are presented and compared. The median filter together with equalization algorithm is analyzed for the thermal image contrast improving with the influence of white noise and impulse noise.
Method for calculation of electrical parameters of dual-band digital phase shifters, which are based on the switchable paths and provide the preset values of differential phase shifts in frequency bands, is offered in work.
In the paper improved matrix model of the subpixel imaging process by optical scanner is proposed. The possibility of the resolution images increasing up to 2 times relatively a simple image formation is shown. A comparative evaluation of the noise immunity of proposed algorithm is conducted.
Developed modification data clustering algorithm for multispectral image segmentation based on their specific opportunities to allocate individual objects or spatial domain with specific spectral properties.
The methods of signal analysis of photosensitive array and related conventional methods of digital filtering of time series is essentially the same as those in other areas of science and technology. Subpixel processing are peculiar, perhaps, only the inverse filtering procedure, providing high resolution of single reflections with limited pixel size photosensitive matrix. Combination of two matrix...
Determination of the acceleration of the dynamic microobjects movement, the motion of which is accelerated uniformly or non-uniformly is an important task in television measuring systems. Most of existing measurement systems usually have a small range of determination of the acceleration with a short period of growth.
The paper presents a complex approach to radar imaging system development. The approach consists of two main stages. The first stage is adaptive aperture formation and the second one is robust adaptive image restoration. The use of adaptive aperture formation strategy makes possible to estimate the principle image components in spatial frequency domain and increase the reliability of received data...
The questions of realization of dual-band passive microwave devices for a radio channel of wireless access systems are considered in the report.The execution possibility of dual-band front-end module for WiFi connectivity on the basis of such dual-band schemes is shown on the example of real module. A number of main passive elements on which depends the dual-band work of system are defined and options...
Expanding and improving the parameters of modern radio systems by complexing the information from sensors of various bands of the spectrum of electromagnetic waves is presented in the paper.
In this paper, we consider the compound wiretap channel with collaborative wiretappers. Contrarily to [1], where the wiretappers act independently, we analyze the setup when the wiretappers form a coalition, which shares the observed data within the coalition. The goal of coalition consists in learning the secret message communicated to the legitimate user by sharing their observations to produce...
Principles of combination of dispersive-time and digital signal processing methods in problems of identification, evaluation parameters, recognition and identification of complex signals and means that they emit.
The ways of a nanoluminescent scanning optical microscope (NSOM) construction for the microorganisms functioning research under the low temperatures influence are considered.
In many problems such as biometrics, multimedia search and retrieval, recommendation systems requiring privacy-preserving similarity computations and identification, some binary features are stored in the public domain or outsourced to the third parties that might raise certain privacy concerns about the original data. To avoid this privacy leak, privacy protection is used. In the most cases, the...
The given results of design of compound signals are with the discrete change of frequency. It is analyzed influence of some parameter of p on cross-correlation and frequency properties of RF pulse signals with the different amount of frequency steps. The ambiguity function are got for the different parameters of discrete FM signals.
In this paper the problem of evaluation of bound accuracy for the range based localization techniques in the wireless sensor networks is considered. The comprehensive analysis of the existing solution of the Cramer-Rao lower bound problem for the anchored localization based on the time of arrival or relative signal strength principles shows certain discrepancy between analytical solution and simulation...
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