Features of digital signal processing in the information control systems of multipositional radar

Parhomey, I. R.; Boiko, Juliy; Eromenko, Oleksander

doi:10.5604/17348412.1230101

Cited by 11 publications

(6 citation statements)

References 6 publications

(16 reference statements)

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“…But the introduction of differential coupling in the SAC leads to the formation of new roots in the characteristic equation of = 0, = 0, equal to 1 = −1/ 1 , 2 = −1/ 2 . These roots will be matched by the new components 1 1 , 2 2 , leading to an additional phase shift of the SAC RP. Thus, in order that these components do not have a significant effect on the transient functions of the SAC RP, that is , , we find the roots of the characteristic equation according to (15).…”

Section: Figure 1 Generalized Functional Diagram Of Sac Dpmentioning

confidence: 99%

“…Analysis of the technical characteristics of modern antennas and the experience of their use in different radio systems show that the active electronically scanned array (AESA) meets the requirements to the antenna systems of multifunctional radio equipment [1][2][3][4][5][6]. The use of AESA in mobile and space radio complexes can significantly increase the range of radio communication, quality, efficiency and volumes of transmitted information.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of quality indicators of the automatic control system influence of accident interference

et al. 2020

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This work concentrates the analysis of the system of automatic control of the directive diagram of the moving active electronically scanned array with a limited number of transceiver modules. The analysis revealed a number of shortcomings that lead to a significant increase in standard deviations, quadratic integral estimates, and an increase in transient time. The identified disadvantages lead to a decrease in the efficiency of the antenna system, an increase in the error rate at the reception, the inability of the system to react to disturbances applied to any point of the system in the event of a mismatch of a given signal/noise level. In accordance with the analysis, the mathematical model of the automatic control system of the directional diagram of the moving active electronically scanned array was considered, considering this a new method of estimating the quality indicators of the automatic control diagram of the directional diagram of the active electronically scanned array in a random setting and disturbing action was developed. The difference between the proposed method and the existing method is in the construction of an automatic control system with differential coupling equivalent to the combination due to the introduction of derivatives of the random setting action of the open compensation connection.

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Section: Figure 1 Generalized Functional Diagram Of Sac Dpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of quality indicators of the automatic control system influence of accident interference

et al. 2020

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“…There are methods for the efficiency assessing of radar signals due to energy parameters -energy, power, spectral distribution of energy and power, amplitude, etc. [1,2] as well as methods of efficiency estimating due to differentiating properties -the signal basis, the correlation function [3][4][5]. Such methods give an opportunity to evaluate the efficiency effect of just one or more indicators.…”

Section: Introductionmentioning

confidence: 99%

“…The problem of AF radar signals synthesizing by their non-deterministic models isn't practically solved [2,6]. This task becomes urgent as it is possible to implement the signal processing devices with dynamic characteristics that are capable of adaptation as needed [1,7]. The non-deterministic signals can be considered for their potential capability to achieve the maximum gain under these conditions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of phase-frequency instability when processing complex radar signals

Boiko

Karpova

Eromenko

et al. 2020

IJECE

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A new radar system for digital signal processing before detection is proposed. These are the guidelines for selecting an intermediate frequency for signal processing. The features of signal processing in the case of echo-signal selection by the features of the correlation properties of their complex bypass are described. This paper presents the study of ambiguity function (AF) when processing complex radar signals. In this work, the AF synthesis was performed considering non-determined components and the presence of phase-frequency instability. The received result enhances the potentials for distinguishing an incoherent radar signal. The numerical simulation results of received AF are presented. Considering fluctuation components in the complex AF, depending on the laws of the distribution of amplitude and frequency fluctuations and their parameters, allowed to get the gain in the width of the main lobe from the units to tens of times. Paper represents original analytical expressions for AF of radio-signals modulated by narrow band random processes with various distribution laws.

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“…In the presence of noise, the output of the Mueller-Muller method improves as the excess pulse width ratio decreases and it is good for narrowband communication systems. The symbol synchronizer unit corrects the asymmetry of the clock pulses and restores the frame synchronization of the QPSK system, which has a variable synchronization error [25,26]. For a signal to noise ratio of 20 dB, the resulting bit error rate is less than 10 -3 , indicating that the signal is being restored.…”

mentioning

confidence: 99%

Methodology for Assessing Synchronization Conditions in Telecommunication Devices

Boiko¹,

Pyatin²,

Eromenko³

et al. 2020

Adv. sci. technol. eng. syst. j.

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This paper represents analysis of principles providing maximally reliable delay estimation of signal synchronization devices in telecommunication. Clock synchronization schemes on the base of stochastic models, graph-analytic interpretation, analytical functional description and their parameters selection in case of real complex hindrance are analyzed. Dependences between dispersion of maximally reliable estimation of synchronization devices and signal to noise ratio (SNR) are represented. Analytical expressions and dependences are obtained for deviation of synchronization error with respect to SNR at the output of discriminator. Diagrams of state are formed for assessment of digital synchronization device in case of error state. Calculated error of numerical solution of the equation of a stationary grid method. We obtain the schedule of the distribution of the probability density synchronization errors for different values of the normalized time. The functions performed by the symbolic synchronization circle, features of the construction of the timing error detector (TED) are analyzed. The Gardner, Early-Late, Mueller & Muller TED, their error and the S-curve equation are investigated. The dependence of the relative timing error on the SNR is obtained. The article examines the effects of interpolation and decimation conditions in the forming filters of digital communication systems.

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Features of digital signal processing in the information control systems of multipositional radar

Cited by 11 publications

References 6 publications

Assessment of quality indicators of the automatic control system influence of accident interference

Assessment of quality indicators of the automatic control system influence of accident interference

Evaluation of phase-frequency instability when processing complex radar signals

Methodology for Assessing Synchronization Conditions in Telecommunication Devices

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