Results: **20**

#### Evaluation of error probability in determining of reception time of RZS in the presence of white noise

The error origins in determining of reception time of radio probing **signal** are considered in this article. Also the method of error probability calculation was offered in this work. The analysis of maximum probability of such error was carried out for phase-shift keyed **signal** on the base of Barker’s code and radio **signal** ...

#### A sample assessment of the constellation form influence on noise immunity for reception of the QAM-8 radio **signal** in the Matlab environment

The study of **signals** with quadrature-amplitude modulation is an urgent task due to their wide application in the satellite television broadcasting systems, as well as for the communication channel of the INMARSAT satellite communication system and the Sirius satellite....

#### On the problem of **signal** reconstruction in the case of analog-to-digital conversion in communication systems

The work of analog-to-digital converter and the problems arising in the reduction of the input **signal** are investigated. A solution to the problem of aperture uncertainty is presented by using a constructive method with an approximate analysis of the reconstructed **signal**.
1. Балакай В. Г., Крюк И. П., Лукьянов Л. М. ...

#### Research of process in bistable system when passing the mix of the harmonious **signal** and «white» noise

In the work the mechanism of compound harmonic **signal** and noise through the bistable system which role carries out Schmitt's trigger is considered. Dependence of signal-to-noise ratio on different factors is shows. Necessary conditions for ensuring increase of the signal-to-noise ratio at the output ...

#### Measurement of the attitude a **signal**/noise of a mix of a harmonious **signal** and narrow-band noise

The algorithm of definition of the attitude a **signal**/noise for a mix of a **signal** and narrow-band noise is offered at various noise levels that can be used at various ways of processing of **signals**.
1. Баскаков C. И. Радиотехнические цепи и сигналы. М., 2009. ...

#### Bases of the theory of digital communication systems with not orthogonal carrier frequencies

The algorithm of the solution of the task of permission of **signals** in communication systems with not orthogonal carrier frequencies is provided. A basis are provisions of the theory of optimum reception in the annex to communication systems. It is shown that the system of equations of credibility allows to solve ...

#### Reseach of loses at propagation of the radio **signal** of cellular communication on the basis of statistical models

Calculation of level of losses of a radio **signal** of cellular communication in the conditions of a city with dense many-storeyed building on the basis of statistical models is resulted. On the basis of statistical look-ahead estimations of loss of capacity of a **signal** on an input of user's stations ...

#### Generalized model of a satellite information transmission channel using Nyquist shaping filters

The results of generalized satellite channel model constructing in MathCAD, including the synthesis of a discrete information **signal**, the implementation of a convolutional encoder, a forming Nyquist filter and a BPSK modulator, the synthesis of a discrete additive narrow-band Gaussian noise, the implementation of a BPSK demodulator and a decoder based on the Witterby algorithm ...

#### Automated training system for studying the complex of radio monitoring and **signal** analysis

The article proposes ways and principles of creating automated training systems using the example of a training program for studying a radio monitoring and **signal** analysis complex (Kassandra class) for training information security specialists, which can be used by educational organizations and training centers conducting training in this area.
Sayapina M. E.
training system, radio monitoring, **signal** ...

#### The solution of a problem of detection of a **signal** at vertical sounding of an ionosphere

In the real work the solution of a problem of determination of parameters of the radio impulse reflected from an ionosphere is considered. The noise component, and also the multibeam structure of a **signal** arising at formation two magnetoionic component is thus considered. Expression for definition of probability of reception of a radio impulse in these conditions is received.
1. Перов А. И. Статистическая теория радиотехнических ...

#### Method of the estimation of parameters of **signals** at change of range to the purpose

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 ...

#### Features of connecting measuring devices with the software package Matlab

... paper describes an algorithm for integrating digital measuring devices with a personal computer as part of a multifunctional instrument complex for using the resources of the Matlab application software package for recording and processing received **signals**. The basic device is a memory oscilloscope manufactured by «Tektronix», which has proven itself in laboratory experiments on radio spectroscopy. The proposed procedure for connecting the oscilloscope to the software package is a sequence ...

#### Development of a software complex on the quality assessment of a digital channel of communication of a marine mobile satellite service

The paper presents the results of a study in which laboratory facilities were assembled to measure the probability of receiving erroneous bits for BPSK, QPSK, 8PSK, DBPSK, QAM-4,8,16,64 radio **signals** for various SNRs in the MATLAB + Simulink simulation environment. The research results and the developed virtual laboratory setup have found application in a comparative assessment of the noise immunity of a radio channel using standard and ...

#### Calculation method of the channel potential possibilities of surface vessel radiocommunication system in the mode of pseudo-random frequency tuning

... multi-channel duplex radio communication systems that ensure reliable operation on a surface vessel. The research provides analytical expressions for the calculation of the possible number of transmit-receive channels in the model, depending on the **signal** spectrum width in the channel. The proposed software allows you to quickly calculate the parameters of the communication system.
1. Катанович А. А. Комплексы и системы связи надводных кораблей....

#### iltering of **signals** from noise by maximum likelihood method

A method of filtering radar pulse on the background of the focus obtained by frequency interference. The basis of the method are the principles of the theory of optimal reception and position of the linear space of **signals**. Derived the basic expressions when filtering of the **signal** strength in the area of orthogonality of **signal** and noise, and their non-orthogonality. Equations for impulse and hour-tonyh characteristics of filters.
1. Баскаков С. И. Радиотехнические ...

#### The maximum likelihood method as applied to chirp **signals**

This article presents **signal** processing through linear frequency modula-tion (chirp **signals**) using the maximum likelihood method. The authors have obtained main expressions describing the optimal algorithm for processing these **signals**, as well as expressions for chirp **signal** ...

#### The investigation of the conditions of registration of the indirect nuclear quadrupole resonance **signals**

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. 1. Гречишкин В. С., Гречишкина Р. В., Шпилевой А. А., Персичкин А. А., Хун Хео // Оптика и спектроскопия. 2003. Т . 94, № 3. 2. Neiman A., Shimansk-Geier L., Moss F. // Phys. Rev. 1997...

#### Analysis of influence emitter bipolar transistor spurious inductance on variable oscillator characteristics

The purpose of the work to make clear the influence emitter bipolar transistor spurious inductance on tuning frequency range, **signal** amplitude and noise-signal ratio of oscillator.
1.
Савченко М.
П.
Флуктуации в перестраиваемых варикапами высокочастотных транзисторных автогенераторах: ...

#### Physical aspects of the providing high-quality mobile radio communication to the peripheral settlement of the Kaliningrad region

... cellular base stations was determined, and the choice of equipment was justified.
Filatova M. G., Aletskaya V. A., Shpilevaya S. G.
radio reception, mobile radio-communication, 5G networks (fifth generation), frequency range, base station, **signal** attenuation
66-75

#### Optimization of parameters of antenna systems for radiofrequency irradiation of polycrystalline compounds

... in the volume of polycrystalline substances.
Ponymatkin V. E., Shpilevaya S. G., Goglev V. A., Burmistrov V. I., Popov A. A.
antenna system, multi-section inductor, equivalent resistance, propagation range, excitation of nuclear resonance **signals**, detection of objects in dielectric substances
74-83