Algorithm for estimating energy characteristics at the output of the correlator

2021 ◽  
Vol 8 ◽  
pp. 24-28
Author(s):  
V.N. Kharisov ◽  
A.V. Peltin
Keyword(s):  
Carrier Phase ◽  
Energy Characteristics ◽  
Modeling And Analysis ◽  
Signal Component ◽  
Primary Processing ◽  
The Real ◽  
Energy Parameters ◽  
Useful Signal ◽  
Navigation Equipment

For the operation of the channels for tracking the carrier (phase and frequency) and the envelope of the signal of the primary processing of the navigation equipment, it is necessary to evaluate, in one way or another, the energy parameters at the output of the correlator: the amplitude of the signal component and the dispersion at the output of the correlator. In practice, to estimate the amplitude of the signal component, either the real part or the modulus of the complex correlator is used over the entire grouping interval. These approaches have a number of disadvantages. To estimate the variance of the correlator output, it is necessary to select separate channels in which there is obviously no useful signal, which takes away some part of the hardware resources. The article proposes an algorithm for estimating the energy parameters at the output of the correlator only from the data of the corresponding channel without the formation of special correlators, which is operable in both coherent and incoherent modes and is based on the use of correlation integrals over short and full intervals. Modeling and analysis of the accuracy characteristics of the proposed algorithm is carried out.

Accuracy of measuring the frequency and time of arrival of a useful signal in aviation and space-rocket radio systems at presence of additive and multiplicative interference with low level

2021 ◽  
pp. 3-15
Author(s):  
В.М. Артюшенко ◽  
В.И. Воловач
Keyword(s):  
Frequency Measurement ◽  
Signal Frequency ◽  
Time Of Arrival ◽  
Low Level ◽  
Energy Parameters ◽  
Space Rocket ◽  
Useful Signal ◽  
Additive Interference ◽  
Accuracy Of Measurement ◽  
Multiplicative Interference

Произведена оценка влияния флуктуационных стационарных мультипликативных помех, действующих одновременного с аддитивными помехами, на точность измерения неэнергетических параметров информационных сигналов. Показано, что мультипликативная помеха низкого уровня оказывает более сильное влияние на точность измерения времени прихода, чем на точность измерения частоты полезного сигнала. Осуществлена количественная оценка влияния мультипликативной помехи на точность измерения неэнергетических параметров полезного сигнала. The influence of fluctuating stationary multiplicative interference acting simultaneously with additive interference on the accuracy of measurement of non-energy parameters of information signals is estimated. It is shown that low-level multiplicative interference has a stronger effect on the accuracy of the arrival time measurement than on the accuracy of the useful signal frequency measurement. A quantitative assessment of the effect of multiplicative interference on the accuracy of measurement of non-energy parameters of the useful signal is carried out.

Accuracy of measurement of the signal information parameter in aviation and space-rocket radio systems in the presence of additive and multiplicative interference with a low level

2020 ◽  
pp. 3-12
Author(s):  
В.М. Артюшенко ◽  
В.И. Воловач
Keyword(s):  
Low Level ◽  
Energy Parameters ◽  
Space Rocket ◽  
Useful Signal ◽  
Information Parameter ◽  
Additive Interference ◽  
Accuracy Of Measurement ◽  
Radio Systems ◽  
Multiplicative Interference

Рассмотрено и проанализировано влияние флуктуационных стационарных мультипликативных помех, действующих одновременного с аддитивными помехами, на точность измерения неэнергетических параметров информационных сигналов. Показано, что при низком уровне мультипликативных и аддитивных помех оценка одного параметра полезного сигнала оказывается несмещенной, а ее дисперсия представляет сумму двух слагаемых, первое учитывает влияние аддитивных помех, второе - мультипликативных. Наиболее опасными являются медленные мультипликативные помехи. The influence of fluctuating stationary multiplicative interference acting simultaneously with additive interference on the accuracy of measurement of non-energy parameters of information signals is considered and analyzed. It is shown that at a low level of multiplicative and additive interference, the estimation of one parameter of the useful signal is unbiased, and its dispersion is the sum of two terms, the first takes into account the influence of additive interference, the second - multiplicative. Slow multiplicative interference is the most dangerous.

scholarly journals The speckle-interferometric images modelling of artificial Earth satellites in problems of near-Earth astronomy

2018 ◽  
Vol 27 (1) ◽  
pp. 120-125
Author(s):  
Vladimir P. Aleshin ◽  
Eugene A. Grishin ◽  
Oleg A. Ivlev ◽  
Dmitry D. Novgorodtsev ◽  
Victor D. Shargorodsky
Keyword(s):  
Large Set ◽  
Energy Characteristics ◽  
The Real ◽  
Artificial Earth Satellites ◽  
Optical Images ◽  
Efficiency Estimation ◽  
Artificial Earth ◽  
Atmosphere Turbulence ◽  
Registration Scheme ◽  
3D Shapes

Abstract The article represents the results of efficiency estimation for perspective observation facilities of near-Earth astronomy in terms of the AES (artificial Earth’s satellite) optical images obtaining and quality. A mathematical method for modeling optical images based on the induced virtual environment is proposed . A speckle interferometric image registration scheme and bispectral processing are reviewed. Upon modelling, the real speckle interferometric images of stars have been used as scattering functions; the AES orbits and geometry have been set in reliance on the real AES orbits and 3D-shapes. Additionally, photon and readout noises have been modelled. A large set of different variants of the AES orbits and 3D-shapes is reviewed.Anon-linear distortion problem is analyzed. The modelling has been performed under various atmosphere turbulence conditions (2”, 4”). The following characteristics have been estimated: number of frames to accumulate depending on the AES orbit and shape, noise intensity, type and parameters of bispectral processing, energy characteristics.

scholarly journals Reducing the prior identification uncertainty of the bearing of active interference sources

2021 ◽  
Vol 31 (1) ◽  
pp. 7-15 ◽  
Author(s):  
A. M. Batkovsky ◽  
E. B. Mazakov ◽  
V. Ya. Trofimets ◽  
E. N. Trofimets ◽  
A. V. Fomina
Keyword(s):  
Software Systems ◽  
Redundant Information ◽  
Problem Statement ◽  
Energy Characteristics ◽  
Primary Processing ◽  
Correlation Integral ◽  
The Matrix ◽  
Spatial Coordinates ◽  
Interference Signals ◽  
Practical Implications

Problem statement. In measuring the spatial coordinates of sources of active interference, one of the main tasks is to identify their bearings. This problem belongs to the class of multi-alternative problems of statistical choice of hypotheses, the solution of which becomes much more complicated with an increase in the number of sources of active interference.Objective. Reduce the prior uncertainty in identifying bearings of active interference sources due to the use of differences in their energy characteristics at the stage of primary processing of interference signals, recalculated to the points of intersection of bearings.Results. The article discusses the processing features of bearing information in a two-position radar system. It is shown that in these systems, due to the absence of redundant information, the identification of bearings is a multi-alternative problem of statistical choice of hypotheses. The analysis of the matrix of coordinates of intersections of azimuthal bearings is carried out, a rule for identifying possible hypotheses of identification is formulated. It is proposed to use the energy differences of interference signals to reduce the prior uncertainty in identifying bearings. It is shown that a measure of this difference can be the value of the correlation integral, calculated at the stage of primary processing of interference signals.Practical implications. The principle of bearing identification considered in the article can be used to implement the identification of bearings from sources of active interference and other various radio emission objects, including space ones, when upgrading the mathematical and software systems for information processing.

Accuracy of measurement of the signal information parameter in aviation and space-rocket radio systems in the presence of additive and multiplicative interference with a low level

2020 ◽  
pp. 24-34 ◽  
Author(s):  
В.М. Артюшенко ◽  
В.И. Воловач
Keyword(s):  
Low Level ◽  
Energy Parameters ◽  
Space Rocket ◽  
Useful Signal ◽  
Information Parameter ◽  
Additive Interference ◽  
Accuracy Of Measurement ◽  
Radio Systems ◽  
Multiplicative Interference

Рассмотрено и проанализировано влияние флуктуационных стационарных мультипликативных помех, действующих одновременного с аддитивными помехами, на точность измерения неэнергетических параметров информационных сигналов. Показано, что при низком уровне мультипликативных и аддитивных помех оценка одного параметра полезного сигнала оказывается несмещенной, а ее дисперсия представляет сумму двух слагаемых, первое учитывает влияние аддитивных помех, второе - мультипликативных. Наиболее опасными являются медленные мультипликативные помехи. The influence of fluctuating stationary multiplicative interference acting simultaneously with additive interference on the accuracy of measurement of non-energy parameters of information signals is considered and analyzed. It is shown that at a low level of multiplicative and additive interference, the estimation of one parameter of the useful signal is unbiased, and its dispersion is the sum of two terms, the first takes into account the influence of additive interference, the second - multiplicative. Slow multiplicative interference is the most dangerous.

scholarly journals Development of a Neural Network Simulator for Studying the Constitutive Behavior of Structural Composite Materials

2013 ◽  
Vol 2013 ◽  
pp. 1-10
Author(s):  
Hyuntae Na ◽  
Seung-Yub Lee ◽  
Ersan Üstündag ◽  
Sarah L. Ross ◽  
Halil Ceylan ◽  
...  
Keyword(s):  
Neural Network ◽  
Composite Materials ◽  
Fiber Composite ◽  
Constitutive Behavior ◽  
Diffraction Field ◽  
Network Simulator ◽  
Modeling And Analysis ◽  
The Real ◽  
Inverse Simulation ◽  
Artificial Neural Network Ann

This paper introduces a recent development and application of a noncommercial artificial neural network (ANN) simulator with graphical user interface (GUI) to assist in rapid data modeling and analysis in the engineering diffraction field. The real-time network training/simulation monitoring tool has been customized for the study of constitutive behavior of engineering materials, and it has improved data mining and forecasting capabilities of neural networks. This software has been used to train and simulate the finite element modeling (FEM) data for a fiber composite system, both forward and inverse. The forward neural network simulation precisely reduplicates FEM results several orders of magnitude faster than the slow original FEM. The inverse simulation is more challenging; yet, material parameters can be meaningfully determined with the aid of parameter sensitivity information. The simulator GUI also reveals that output node size for materials parameter and input normalization method for strain data are critical train conditions in inverse network. The successful use of ANN modeling and simulator GUI has been validated through engineering neutron diffraction experimental data by determining constitutive laws of the real fiber composite materials via a mathematically rigorous and physically meaningful parameter search process, once the networks are successfully trained from the FEM database.

Accuracy of measurement of the signal information parameter in aviation and space-rocket radio systems in the presence of additive and multiplicative interference with a low level. Part 2 (Examples of frequency and arrival time measurements useful signal)

2020 ◽  
pp. 14-26
Author(s):  
В.М. Артюшенко ◽  
В.И. Воловач
Keyword(s):  
Arrival Time ◽  
Frequency Measurement ◽  
Signal Frequency ◽  
Low Level ◽  
Energy Parameters ◽  
Space Rocket ◽  
Useful Signal ◽  
Additive Interference ◽  
Accuracy Of Measurement ◽  
Multiplicative Interference

Произведена оценка влияния флуктуационных стационарных мультипликативных помех, действующих одновременного с аддитивными помехами, на точность измерения неэнергетических параметров информационных сигналов. Показано, что мультипликативная помеха низкого уровня оказывает более сильное влияние на точность измерения времени прихода, чем на точность измерения частоты полезного сигнала. Осуществлена количественная оценка влияния мультипликативной помехи на точность измерения неэнергетических параметров полезного сигнала. The influence of fluctuating stationary multiplicative interference acting simultaneously with additive interference on the accuracy of measurement of non-energy parameters of information signals is estimated. It is shown that low-level multiplicative interference has a stronger effect on the accuracy of the arrival time measurement than on the accuracy of the useful signal frequency measurement. A quantitative assessment of the effect of multiplicative interference on the accuracy of measurement of non-energy parameters of the useful signal is carried out.

3. Chemical and Biological Sensing: Modeling and Analysis from the Real World

2003 ◽  
pp. 55-86
Author(s):  
Ira B. Schwartz ◽  
Lora Billings ◽  
David Holt ◽  
Anne W. Kusterbeck ◽  
Ioana Triandaf
Keyword(s):  
Real World ◽  
Biological Sensing ◽  
Modeling And Analysis ◽  
The Real

Determination of the Energy Parameters of the Shock Mechanism Used to Harden the Surface by Plastic Deformation

2015 ◽  
Vol 756 ◽  
pp. 85-91 ◽  
Author(s):  
A. Kirichek ◽  
S.A. Silant’ev
Keyword(s):  
Plastic Deformation ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Energy Characteristics ◽  
Measuring Methods ◽  
Energy Parameters ◽  
Shock Mechanism

The possibilities of application of various designs of shock mechanisms for hardening by surface plastic deformation were considered. The measuring methods of their energy characteristics were shown.

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