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Journal articles on the topic 'Synthesis of signals'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Khrapov, S. D., and A. V. Strukova. "Synthesis of optimal transmitter signal, providing the maximum noise immunity of the equipment of aviation and space radio systems under the influence of a complex of noise." Informacionno-technologicheskij vestnik, no. 2 (July 30, 2019): 72–78. http://dx.doi.org/10.21499/2409-1650-2019-2-72-78.

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The questions related to the synthesis of the optimal signal of the transmitter providing the maximum mechanical stability of the equipment of aerospace radio systems under the influence of a complex of noise are considered and analyzed. The problem of finding the optimal signal for detection in non-Gaussian interference is considered. The criteria for the selection of signals and the conditions imposed on them are analyzed. Considered variational principles of synthesis signals. Examples of solving problems of synthesis of transmitted signals are given.

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Zamula, A. A., I. D. Gorbenko, and Ho Tri Luc. "Statistical properties of derived signal systems." Radiotekhnika, no. 203 (December 23, 2020): 141–47. http://dx.doi.org/10.30837/rt.2020.4.203.14.

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The search for effective methods of synthesis of discrete signals (sequences) that correspond to the potentially possible limiting characteristics of correlation functions and possess the necessary correlation, structural, ensemble properties remains an urgent problem. The authors have proposed a method for the synthesis of derivatives of signal systems, for which orthogonal signals are used as the initial ones, and nonlinear discrete complex cryptographic signals (CS) are used as generating signals. The synthesis of the latter ones is based on the use of random (pseudo-random) processes, incl

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Yoga, I. Putu Harta, and Gst Ayu Vida Mastrika Giri, S.Kom., M.Cs. "Virtual Hybrid Synthesizer Application." JELIKU (Jurnal Elektronik Ilmu Komputer Udayana) 8, no. 3 (2020): 357. http://dx.doi.org/10.24843/jlk.2020.v08.i03.p19.

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Hybrid synthesizers can be syntheses with digital or analog signals on a hardware device. In this article hybrid means make a virtual digital synthesis which combines several synthesis methods. The method used is the synthesis method of additive, substractive, and amplitude modulation (AM). Where the initial signal is an oscillator by making waves with the form Sinusoide Wave, Square Wave and Saw Tooth Wave. This virtual synthesis produces sound that has the same fundamental frequency as the fundamental frequency of notes. Keywords: Hibrid Synthesizer, Additive, Substractive, Amplitude M

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Zhilyakov, Evgeniy G., Sergei P. Belov, Andrei A. Chernomorets, Diana Ig. Trubitsyna, and Tatyana N. Balabanova. "SUBBAND ANALYSIS AND SYNTHESIS OF SIGNALS." COMPUSOFT: An International Journal of Advanced Computer Technology 08, no. 06 (2019): 3206–11. https://doi.org/10.5281/zenodo.14830142.

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Currently, a wide class of modern wireless telecommunications systems is based on the use of broadband signals. The problems of synthesis for their formation and processing algorithm are extremely important for such systems, especially under the conditions of various types of disturbances, which is impossible without scientifically based analysis of signal properties. The article presents the results of signal property and synthesis sub-band analysis obtained by the division of the Fourier cosine transformation (transformants) definition domain for signal record into sub-bands (frequency repre

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Rogozinsky, G., M. Chesnokov, and A. Kutlyiarova. "Some New Mathematical Models of Synthesized Sound Signals." Proceedings of Telecommunication Universities 8, no. 2 (2022): 76–81. http://dx.doi.org/10.31854/1813-324x-2022-8-2-76-81.

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Modern sound synthesis systems make it possible to implement various signal generation algorithms of higher complexity. The theory of sound synthesis actively uses the mathematical apparatus of analog and digital radio engineering and signal processing, however, it should be noted that the classical signal models used in acoustics are not adequate to real-world synthesized signals, mainly due to the significant complexity of the latter. This article presents some models of synthesized signals typical for practical use.

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Li, Xiaomin, Mykhailo Sakevych, Gentry Atkinson, and Vangelis Metsis. "BioDiffusion: A Versatile Diffusion Model for Biomedical Signal Synthesis." Bioengineering 11, no. 4 (2024): 299. http://dx.doi.org/10.3390/bioengineering11040299.

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Machine learning tasks involving biomedical signals frequently grapple with issues such as limited data availability, imbalanced datasets, labeling complexities, and the interference of measurement noise. These challenges often hinder the optimal training of machine learning algorithms. Addressing these concerns, we introduce BioDiffusion, a diffusion-based probabilistic model optimized for the synthesis of multivariate biomedical signals. BioDiffusion demonstrates excellence in producing high-fidelity, non-stationary, multivariate signals for a range of tasks including unconditional, label-co

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Gorbenko, I. D., and A. A. Zamula. "Theoretical approaches to the synthesis of discrete signals with necessary properties." Radiotekhnika, no. 206 (September 24, 2021): 25–32. http://dx.doi.org/10.30837/rt.2021.3.206.02.

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Methods for information exchange, formation and processing of data used in information and communication systems (ICS), as well as classes of broadband signals used as a physical data carrier, do not provide the necessary (for individual ICS applications) indicators of cyber and information security, noise immunity of reception signals and secrecy of IKS functioning. Most of the existing systems use signals, the construction of which is based on linear laws, which allows an attacker, based on the establishment of the parameters of the signals used in the system, to carry out deliberate interfe

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8

Chekalin, G. M. "Synthesis of Vector Signals." Telecommunications and Radio Engineering 52, no. 10 (1998): 32–35. http://dx.doi.org/10.1615/telecomradeng.v52.i10.80.

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9

Vorob’ev, V. I., and A. G. Davydov. "Synthesis of speechlike signals." Acoustical Physics 48, no. 5 (2002): 623–25. http://dx.doi.org/10.1134/1.1507210.

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10

Sattarova, A. I. "Vector signal analysis and synthesis solutions overview." SYNCHROINFO JOURNAL 6, no. 5 (2020): 12–20. http://dx.doi.org/10.36724/2664-066x-2020-6-5-12-20.

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Modern signals with a complex structure require technological equipment capable of evaluating many parameters that determine the signal quality. Therefore, in order to systematize the solutions existing on the market and their capabilities, a review was made of the solutions existing on the market for the synthesis and analysis of complex signals. The main parameters for assessing the quality of complex signals are considered, the characteristics of generators and analyzers of complex signals existing on the market are presented and their comparison is made according to the main consumer quali

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Zhang, Xian Yi, Jian Xu, Xiang Quan Guo, Yan Ting Lan, and Jia Yan Tao. "A Signal Generator Based on AD9850." Advanced Materials Research 712-715 (June 2013): 1767–70. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1767.

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This paper analyzes the advantages of the direct digital frequency synthesis (DDS) in signal generator applications, introduces the basic principles and characteristics of AD9850, a cost-effective chip, shows the overall scheme of a signal source design based on DDS and implements the hardware system. Experimental results show the signal generator can produce sine wave signals scoping from 100Hz to 5MHz, clock signals and triangular wave signals and can display frequency on the LCD.

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Poliarus, Oleksandr, Iryna Nazarenko, Yevhen Poliakov, Andrii Lebedynskyi, and Sergii Ianushkevych. "Synthesis of the model of the socio-economic system." SHS Web of Conferences 67 (2019): 06041. http://dx.doi.org/10.1051/shsconf/20196706041.

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The identification of the socio-economic system, which includes the scientific and scientific-technical activities of Ukraine, using the three input and output signals, is carried out in the article. The synthesis of the model is based on the minimization of the functional, which is the distance in the functional space with the quadratic metric between the real output signal and the theoretical signal containing the unknown parameters of the system model. These parameters include the system time constant and the coefficients that describe the power transformation function of the nonlinear bloc

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Dvornikov, Sergey S., Kirill D. Zheglov, and Sergey V. Dvornikov. "SSB signals with controlled pilot level." T-Comm 17, no. 3 (2023): 41–47. http://dx.doi.org/10.36724/2072-8735-2023-17-3-41-47.

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An approach to the formation of single-sideband modulation signals based on quadrature synthesis is considered. The relevance of the use of single-sideband modulation signals for decameter radio communication systems is demonstrated. The analytical generality of the signals of amplitude and single-sideband modulation is shown in the transition to the analytical form of their representation. An analysis of the known methods for generating signals of single-sideband modulation with a suppressed carrier has been carried out. Their advantages and disadvantages are shown. The structural commonality

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Ivan, Gorbenko, and Zamula Oleksandr. "Devising methods to synthesize discrete complex signals with required properties for application in modern information and communication systems." Eastern-European Journal of Enterprise Technologies 3, no. 9 (111) (2021): 16–26. https://doi.org/10.15587/1729-4061.2021.234674.

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Information and communication systems (ICSs) must comply with increasingly stringent requirements to ensure the reliability and speed of information transmission, noise immunity, information security. This paper reports the methods to synthesize discrete complex cryptographic signals, underlying the construction of which are random (pseudo-random) processes; the methods for synthesizing characteristic discrete complex signals whose construction is based on using the nature of the multiplicative group of a finite field; the results of studying the properties of the specified signal systems. It

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15

Stepanov, Andrey. "Polynomial, Neural Network, and Spline Wavelet Models for Continuous Wavelet Transform of Signals." Sensors 21, no. 19 (2021): 6416. http://dx.doi.org/10.3390/s21196416.

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In this paper a modified wavelet synthesis algorithm for continuous wavelet transform is proposed, allowing one to obtain a guaranteed approximation of the maternal wavelet to the sample of the analyzed signal (overlap match) and, at the same time, a formalized representation of the wavelet. What distinguishes this method from similar ones? During the procedure of wavelets’ synthesis for continuous wavelet transform it is proposed to use splines and artificial neural networks. The paper also suggests a comparative analysis of polynomial, neural network, and wavelet spline models. It also deals

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16

Bedzhev, Borislav. "Method for synthesis of large families of signals with low correlation." Journal scientific and applied research 2, no. 1 (2012): 13–20. http://dx.doi.org/10.46687/jsar.v2i1.37.

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In the paper a new method for synthesis of large families of signals with low auto- and crosscorrelation is presented. It is based on the known method for generation of Gold sets but is not related to a certain value of the decimation coefficient d. As a result it allows generating of families, consisting of p-ary M –sequences, for arbitrary values of p and the degree of their characteristic equation.

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Kol'tso, N. E., S. A. Grenkov, and L. V. Fedotov. "Comparison of Radio Interferometers with Analog and Digital Extraction of Recorded Signal." Journal of the Russian Universities. Radioelectronics 23, no. 2 (2020): 6–18. http://dx.doi.org/10.32603/1993-8985-2020-23-2-6-18.

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Introduction. Radio telescopes of Very Long Baseline Interferometry (VLBI) networks usually record several signals with relatively narrow (up to 32 MHz) bands, which are extracted by means of base band converters (BBC) from an analog noise signal of an intermediate frequency (IF) with bands up to 1 GHz. When processing data, frequency band synthesis is used. At new small radio telescopes (for example, RT-13), directly wideband IF signals are digitized. An ability to connect the RT-13 radio telescope to the “Quasar” VLBI complex and to international VLBI networks provides by a digital narrow-ba

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18

Butyrskiy, Evgeniy, and Vitaliy Rahuba. "Polyharmonic signals and their properties." National Security and Strategic Planning 2020, no. 3 (2020): 37–50. http://dx.doi.org/10.37468/2307-1400-2020-3-37-50.

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This article proposes a new approach to signal synthesis to ensure the stealth and safety of active location tools, which improves the efficiency of lighting. The work has been classified complex broadband signals, considered the class of polyharmonic and band signals, their pros and cons, the prospects of application in the systems of location, shows the relationship of their signals with hyperbolic function and generalized range Fibonacci.

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19

Fadhlullah, Muhammad, and Catur Atmaji. "Pemodelan Harmonik untuk Pelafalan Makhraj Huruf Hijaiah." IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) 12, no. 1 (2022): 25. http://dx.doi.org/10.22146/ijeis.71664.

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Learning to pronounce hijaiah letters needs to be assessed objectively, so it is necessary to form digital audio resulting from the synthesis of Harmonic Plus Residual (HPR) modeling, which conducted with two pronunciation methods, taskin and tasydid. The experiment consists data acquisition, signal cutting, framing and windowing, detection of fundamental and harmonic frequencies, synthesis of HPR, to produce synthetic signals. The results of the synthetic signals then analyzed qualitatively by signal spectrogram analysis and scoring.From the experimental results, it can be concluded that this

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20

Suzuki, Harumi, Yoichi Shinkai, Lawrence G. Granger, Frederick W. Alt, Paul E. Love, and Alfred Singer. "Commitment of Immature CD4+8+ Thymocytes to the CD4 Lineage Requires CD3 Signaling but Does Not Require Expression of Clonotypic T Cell Receptor (TCR) Chains." Journal of Experimental Medicine 186, no. 1 (1997): 17–23. http://dx.doi.org/10.1084/jem.186.1.17.

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As a consequence of positive selection in the thymus, immature CD4+8+ double-positive, [DP] thymocytes selectively terminate synthesis of one coreceptor molecule and, as a result, differentiate into either CD4+ or CD8+ T cells. The decision by individual DP thymocytes to terminate synthesis of one or the other coreceptor molecule is referred to as lineage commitment. Previously, we reported that the intrathymic signals that induced commitment to the CD4 versus CD8 T cell lineages were markedly asymmetric. Notably, CD8 commitment appeared to require lineage-specific signals, whereas CD4 commitm

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21

Gorbenko, I. D., A. A. Zamula, and Ho Tri Luc. "Methods of synthesis and formation of a system of nonlinear discrete signals for modern information and communication systems." Radiotekhnika, no. 203 (December 23, 2020): 126–32. http://dx.doi.org/10.30837/rt.2020.4.203.12.

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The paper presents the results of solving the urgent problem of improving the performance indicators of information and communication systems (ICS), in particular, information security, noise immunity, secrecy, the speed of formation and processing of information. The use of the distributed spectrum technology (broadband noise-like signals) is a promising direction for ensuring the security of information resources. The methods used for data formation and processing, as well as the classes of broadband signals used as physical data carriers, do not allow providing the necessary (especially for

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22

Espitia, Javier, and Álvaro Velásquez. "Síntesis Digital Directa de Señales para Uso en Instrumentación Científica a Partir de un Generador de Ondas Programable." Entre Ciencia e Ingeniería 6, no. 12 (2012): 9–13. https://doi.org/10.31908/19098367.640.

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Devices based on direct digital synthesis (SDD) have become a very attractive tool for engineers and scientifics who develop electronic instrumentation, being each time more used than analogic systems for signal generation because them offer advantages in performance and ease of manipulation of the parameters of the signals. In this work we present the implementation of the SDD technique in order to generate arbitrary signals with the programmable waveform generator Agilent 33220A. By means of a macro developed in Visual Basic, which is executed from Excel, the data of arbitrary signals are se

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23

Zamula, Alexander, and Ivan Gorbenko. "Optimization for the quick-code methods for the synthesis of discrete signals – physical carriers of data in information-communication systems." Physico-mathematical modelling and informational technologies, no. 32 (July 8, 2021): 126–30. http://dx.doi.org/10.15407/fmmit2021.32.126.

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The paper presents the theoretical foundations of synthesis and analysis of complex nonlinear discrete cryptographic signals, the basis for the synthesis of which are random (pseudo-random) processes, including algorithms for cryptographic transformation of information, as well as methods for optimizing the synthesis of these signals using decimation and discrete programming. namely, the method of branches and boundaries. In order to improve the performance of signal generation and processing, estimates of the effectiveness of the decimation procedure are proposed and presented. It is shown th

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Gorbenko, Ivan, and Oleksandr Zamula. "Devising methods to synthesize discrete complex signals with required properties for application in modern information and communication systems." Eastern-European Journal of Enterprise Technologies 3, no. 9(111) (2021): 16–26. http://dx.doi.org/10.15587/1729-4061.2021.234674.

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Information and communication systems (ICSs) must comply with increasingly stringent requirements to ensure the reliability and speed of information transmission, noise immunity, information security. This paper reports the methods to synthesize discrete complex cryptographic signals, underlying the construction of which are random (pseudo-random) processes; the methods for synthesizing characteristic discrete complex signals whose construction is based on using the nature of the multiplicative group of a finite field; the results of studying the properties of the specified signal systems. It

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Plaksienko, V. S. "Linear-logical decision-making algorithm for signal processing." Vestnik of Don State Technical University 18, no. 4 (2019): 385–91. http://dx.doi.org/10.23947/1992-5980-2018-18-4-385-391.

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Introduction. Heuristic synthesis is used to improve the efficiency of reception and processing of discrete signals under aprior information pressure. The analysis of the decisionmaking algorithm for the linear-logical processing of discrete signals in case of the incomplete aprior data on their parameters is presented. The work objective is to develop and analyze the efficiency of the linear-logical algorithms.Materials and Methods. New mathematical algorithms for the signal reception and processing, effective under conditions of a priori uncertainty, are proposed. They are based on the consi

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Tsankov, Tsvetoslav, Tihomir Trifonov, and Lilia Staneva. "AN ALGORITHM FOR SYNTHESIS OF PHASE MANIPULATED SIGNALS WITH HIGH STRUCTURAL COMPLEXITY." Journal scientific and applied research 4, no. 1 (2013): 80–87. http://dx.doi.org/10.46687/jsar.v4i1.84.

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In the paper an algorithm for synthesis of pseudo-noise signals with high structural complexity is presented. It is based on the possibility the elements of the finite algebraic fields to be generated by means of a linear recurring sequence with maximal length. The algorithm can be used in the development of communication systems with high resistance to hostile radio-electronic environment.

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Gorbenko, I. D., O. V. Potii, and A. A. Zamula. "The concept of synthesis of one class of self-synchronizing discrete signals." Radiotekhnika, no. 204 (April 9, 2021): 24–29. http://dx.doi.org/10.30837/rt.2021.1.204.03.

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The use of broadband signals (BSS) makes it possible to increase the noise immunity of information and communication systems (ICS) when exposed to structural (mutual) and organized interference. The real noise immunity will be lower than the potential one. The reason for the decrease in noise immunity, when entering synchronism and when distinguishing signals, is the presence of side peaks of the correlation functions. Proceeding from this, the NLS used in ICS should have such correlation properties when the side peaks of the NLS CF are as small as possible, i.e. ideally should tend to zero. I

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Korchynskyi, V. V., V. I. Kildishev, A. M. Berdnikov, and K. O. Smazhenko. "INCREASE OF STEALTH TRANSMISSION BASED ON TIMER SIGNALS AND LINEAR FREQUENCY MODULATION." Proceedings of the O.S. Popov ОNAT 1, no. 1 (2020): 53–58. http://dx.doi.org/10.33243/2518-7139-2020-1-1-53-58.

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Recently, much attention has been paid to the research of the properties and methods of forming complex noise-like signals to increase the noise immunity of radio communication systems operating in the conditions of electronic conflict. Using such signals, the tasks are resolved to improve the noise immunity and the main indicators of transmission stealth (energy, structural and information). For the task of the synthesis noise-like signals using timer signal designs in combination with the method of spreading the spectrum based on linear frequency modulation is proposed. The advisability of u

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Shamrai, A. P., and I. E. Kondrashov. "Analysis of sounding signals of radioacoustic sounding systems of the atmosphere in the functional space." Radiotekhnika, no. 219 (May 29, 2025): 59–67. https://doi.org/10.30837/rt.2024.4.219.07.

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Systems of radio acoustic sounding (RAS) of the atmosphere provide information on the state of processes occurring in the lower layers of the atmosphere. They allow measuring vertical profiles of atmospheric temperature, wind speed, and air humidity. The obtained information is used in applied tasks to ensure the takeoff and landing of aircraft, weather forecasting, and the study of atmospheric processes. However, the effectiveness of the existing radio-acoustic means is insufficient, and there are practical needs for the development of appropriate promising structures and algorithms that will

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Yerokhin, Viktor, and Oleksandr Vakulenko. "Evolutoin of algorithms for separation of optimal two mutually unorthogonal signals of binary phase modulation." Collection "Information Technology and Security" 10, no. 1 (2022): 83–97. http://dx.doi.org/10.20535/2411-1031.2022.10.1.261178.

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A review of the results of the development of the methodology for the synthesis of the separation-demodulation algorithms of two mutually non-orthogonal binary phase modulation signals in the length of the information clock interval, synchronous and asynchronous according to the clock points, with continuous and intermittent radiation. The evolution of algorithms for optimal separation of two mutually non-orthogonal signals of binary phase modulation has the following sequence: signals are mutually synchronous by clock points (communication channel – with constant parameters, non-seeding oscil

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Malau, Pasto Juni Ansen, and Yohanes Suyanto. "Sintesis Taganing Adaptif Menggunakan Metode Pitch Shifting by Delay-Line Based untuk Standardisasi Gondang Batak Toba." IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) 10, no. 2 (2020): 131. http://dx.doi.org/10.22146/ijeis.37659.

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This research using pitch shifting by delay line based method which consist of two main stage. The first stage is called analysis stage (framing, windowing, pre-emphasis and de-emphasis and FFT) that can detect the value of fundamental frequency of each taganing’s gendang. Then, this fundamental frequncy from each gendang will be classified into keyboard tones. The second one is called synthesis stage that will process the fundamental frequency become a new desire signal by creat an upward pitch change or a downward pitch change by delay line based method. Result of this research is created ne

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Zheleznjak, V. K., S. V. Lavrov, A. G. Filipovich, and M. M. Baranouski. "Synthesis of a measuring composite signal for assessing the security of speech signals during discrete-quantized transformation." Doklady BGUIR 18, no. 6 (2020): 81–87. http://dx.doi.org/10.35596/1729-7648-2020-18-6-81-87.

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The purpose of the work is to systematically analyze and generalize a high-precision measuring signal for assessing the security in leakage channels in high-level noise by discrete-quantized representation of speech signals using the principles of amplitude-pulse modulation. It has been established that time sampling and level quantization of high-speed high-quality speech signals for digitalization are the main sources of information leakage. It is shown that to determine the degree of information security for high-quality high-speed transmission in broadband information transmission channels

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Bedzhev, Borislav. "ANALYSIS OF THE CONDITIONS FOR SYNTHESIS OF EFFICIENT SIDE-LOBES SUPPRESSION FILTERS FOR PHASE MANIPULATED SIGNALS." Journal Scientific and Applied Research 6, no. 1 (2014): 106–13. http://dx.doi.org/10.46687/jsar.v6i1.146.

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The radio signals, possessing the so-named ideal auto – correlation function, resembling the Dirac delta – function, have a critical role for the wireless communication systems, especially for radars, radio-navigation systems, radio – synchronization and so on. Despite of this at the moment only few classes of such signals are invented. With regard in the paper we analyze in more detail the method for synthesis of pairs of phase manipulated signals and mismatched side-lobe suppression filters (SLSFs), which modify the real periodic auto – correlation function of the signals in the so-named ide

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Rassomakhin, S. G., A. A. Zamula, I. D. Gorbenko, and Ho Tri Luc. "Comparative analysis of noise immunity of reception of nonlinear complex discrete signals with standard signals AFM-16 BPSK." Radiotekhnika, no. 203 (December 23, 2020): 133–40. http://dx.doi.org/10.30837/rt.2020.4.203.13.

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The article shows that the solution to the problem of increasing the noise immunity (noise immunity and secrecy of functioning) of the ICS can be achieved using systems of nonlinear signals with improved ensemble, structural and correlation properties. Two classes of nonlinear complex discrete signals are considered: characteristic discrete signals (CDS) and cryptographic signals (CS). Methods for the synthesis of these signals are presented. The paper gives a statistical simulation model for studying the noise immunity of various classes of signals in the Gaussian channel. Using this model, e

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Zhyla, Simeon, Valerii Volosyuk, Vladimir Pavlikov, et al. "Practical imaging algorithms in ultra-wideband radar systems using active aperture synthesis and stochastic probing signals." Radioelectronic and Computer Systems, no. 1 (March 7, 2023): 55–76. http://dx.doi.org/10.32620/reks.2023.1.05.

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The subject of the manuscript is the algorithms for radar imaging. This research develops imaging methods and algorithms for wideband and ultrawideband active aperture synthesis systems with antenna arrays and stochastic probing signals. The use of antenna arrays makes it possible to obtain radar images without the need to move radar or antenna system in space. The use of wideband and ultra-wideband stochastic probing signals is justified by their narrow autocorrelation functions. This increased the resolution of the obtained images. The main idea of the proposed algorithms is to filter the or

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Sharko, Artem. "MODELS AND METHODS OF PROCESSING OF INFORMATION ON LOADS OF ACOUSTIC SIGNALS IN TECHNICAL DIAGNOSTIC SYSTEMS." Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 8, no. 3 (2018): 15–18. http://dx.doi.org/10.5604/01.3001.0012.5276.

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The paper presents one-dimensional discrete-continuous model of power spectrum estimation of the acoustic emission signal, that allows filtering the oscillating components of the acoustic emission signals. The mathematical formalism describing the environment was discussed, initiating the signals of acoustic emission. The problem of spectral analysis and synthesis of acoustic emission signals was solved with the help of Fourier transform. The dependence of acoustic vibrations spectra on the size of the medium parameters and microstructure has been discussed, as well.

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Velichko, A. P., S. F. Mirsaitov, A. B. Snedkov, and P. O. Shishkov P.O. Shishkov. "Synthesis of Signals with Zero Width of Autocorrelation Function." International Journal of Engineering & Technology 7, no. 4.36 (2018): 37. http://dx.doi.org/10.14419/ijet.v7i4.36.22709.

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This article presents examples of probing functions construction with a small width of autocorrelation function (a noise-like signal, a chirp signal) of long duration, which allows to obtain a reflectivity profile along a high resolution path. Attention is drawn to the fact that space in the process of probe pulse propagation returns to the receiver in an almost mutual correlation function of reflectivity and probe pulse. This approach opens up new possibilities for filtering signals and recognizing targets with appropriate selection and changing shape of the probe pulse right during measureme

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Podkopayev, A. O., and M. A. Stepanov. "SYNTHESIS OF TWO-POINT PARTIALLY COHERENT MODEL, PROVIDING SPECIFIED CORRELATION CHARACTERISTICS OF ANGULAR NOISE, BASED ON ITS EQUIVALENCE OF THREE-POINT NON-COHERENT MODEL WITH SEPARABILITY OF SPATIAL AND TEMPORAL COORDINATES." Issues of radio electronics, no. 4 (May 10, 2019): 16–21. http://dx.doi.org/10.21778/2218-5453-2019-4-16-21.

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The paper considers approaches developed for the synthesis of a two-point geometric model that emits correlated signals and forms angular noise with given spectral-correlation properties, based on its equivalence of a three-point model that emits noncorrelated signals. Analytical relationships have been obtained that allow us to determine the spectral correlation characteristics of the signals supplied to the emitters of the two-point partially coherent model. The basis for the synthesis of a two-point model, emitting correlated signals, is a three-point model, emitting non-correlated signals.

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WEN, YUMEI, PING LI, JIN YANG, and ZHANGMIN ZHOU. "ADAPTIVE LEAK DETECTION AND LOCATION IN UNDERGROUND BURIED PIPELINES." International Journal of Information Acquisition 01, no. 03 (2004): 269–77. http://dx.doi.org/10.1142/s0219878904000240.

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The vibrational acoustic signals collected on pipelines contain substantial information concerning the working status of pipelines. They can be used for pinpointing leaks in buried pipelines. However, because of the complexity of signal composition and the heavy corruption of signals by ambient noises, it is essential to set up an appropriate signal model and scheme of analysis and synthesis in order to extract leak signatures and specify leak locations. In addition, the features of vibrational acoustic signals vary with materials, sizes and buried conditions of tubular pipes. It is difficult

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ZHU, DENGMING, ZHAOQI WANG, and YINGPING ZHANG. "MOTION SYNTHESIS FROM THE SEMANTIC SIGNALS." International Journal of Image and Graphics 08, no. 04 (2008): 535–50. http://dx.doi.org/10.1142/s0219467808003222.

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It is still an open problem to reuse the motion capture data in an intuitive way. In this paper, we present a novel technology to synthesize animations from the low-dimensional semantic signals. The semantic signals are defined as the meanings which are visible to the animators, such as the angles of joints rotation around axis, the trajectories of joints, or other intuitive motion signals. A linear time-invariant system is used to model the relationship between the input semantic signals and the output human motions. Once the model parameters are estimated, the outputs of system can be effect

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Dvornikov, Sergey, Sergey Dvornikov, and Kirill Zheglov. "Noise Immunity of Single-Sideband Modulation Signals with a Controlled Carrier Level." Informatics and Automation 22, no. 2 (2023): 261–88. http://dx.doi.org/10.15622/ia.22.2.2.

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Single-sideband modulation is actively used in the organization of communication through the ionospheric channel in the decameter range of radio waves. This is due to the fact that transmissions with single-sideband modulation make it possible to minimize the frequency band while maintaining the information transfer rate and at the same time increase the noise immunity of reception in relation to transmissions with amplitude and frequency analog modulation. At the same time, the widespread use of quadrature synthesis technologies has opened up new possibilities for the formation of transmissio

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DeKruyff, R. H., T. Turner, J. S. Abrams, M. A. Palladino, and D. T. Umetsu. "Induction of human IgE synthesis by CD4+ T cell clones. Requirement for interleukin 4 and low molecular weight B cell growth factor." Journal of Experimental Medicine 170, no. 5 (1989): 1477–93. http://dx.doi.org/10.1084/jem.170.5.1477.

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We have analyzed in detail the precise requirements for the induction of human IgE synthesis using several experimental approaches with purified B cells and well-characterized alloantigen-specific CD4+ T cell clones expressing different profiles of lymphokine secretion. Using these clones under cognate conditions in which the B cells expressed alloantigens recognized by the cloned T cells, we have confirmed that IL-4 is required for the induction of IgE synthesis, but we have clearly demonstrated that IL-4 by itself is not sufficient. With several cloned CD4+ T cell lines, including an IL-4-pr

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Cheshmedzhiev, Krasimir, Galya Georgieva-Tsaneva, and Yoan-Aleksandar Tsanev. "Mathematical Tools for Simulating Photoplethismographic Signals." Innovative STEM Education 6, no. 1 (2024): 189–94. https://doi.org/10.55630/stem.2024.0622.

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The article presents an algorithm for modeling a photoplethysmographic signal using mathematical equations generating the basic waveforms. Photoplethysmographic signals are recorded by sensors recording changes in light intensity and are used in modern scientific research to conduct an effective mathematical analysis of heart rate variability. The article presents the results of conducted studies of the statistical parameters of the synthesized photoplethysmographic signal. The synthesis time of photoplethysmographic series of different lengths was analyzed.

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Kostyria, O. O., A. A. Нryzo, H. V. Khudov, O. M. Dodukh, and B. А. Lisohorskyi. "TWO-FRAGMENT NON-LINEAR-FREQUENCY MODULATED SIGNALS WITH ROOTS OF QUADRATIC AND LINEAR LAWS FREQUENCY CHANGES." Radio Electronics, Computer Science, Control, no. 1 (April 2, 2024): 17. http://dx.doi.org/10.15588/1607-3274-2024-1-2.

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Context. The rapid development of the technology of digital synthesis and processing of radar signals, which has been observed in recent decades, has practically removed restrictions on the possibility of implementing arbitrary laws of frequency modulation of radio oscillations. Along with the traditional use of linearly-frequency-modulated signals, modern radar means use probing signals with non-linear frequency modulation, which provide a lower level of maximum side lobes and a higher rate of their descent. These factors, in turn, contribute to improving the detection characteristics of targ

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Jovanović, Ana, Luka Lazović, and Vesna Rubežić. "Radiation pattern synthesis using a chaotic beamforming algorithm." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 5 (2016): 1814–29. http://dx.doi.org/10.1108/compel-08-2015-0299.

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Purpose The purpose of this paper is to use the proposed algorithm for the fast adaptation of the antenna array radiation pattern on the particular scenario of the incoming signals. The fitness function to be minimized includes the precise estimation of signals’ arrival angles, setting the deep nulls in the directions of the interfering signal, the reduction of the main lobe’s width and the reduction of side lobes. Design/methodology/approach Unlike conventional adaptive algorithms, the proposed algorithm allows synthesis of radiation patterns in the case of a larger number of incident desired

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Rus, Guillermo, Shi-Chang Wooh, and Rafael Gallego. "Processing of Ultrasonic Array Signals for Characterizing Defects. Part I: Signal Synthesis." IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 54, no. 10 (2007): 2129–38. http://dx.doi.org/10.1109/tuffc.2007.508.

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Dissanayake, W. M. N. D., and Maheshi B. Dissanayake. "A Novel LSTM-based Data Synthesis Approach for Performance Improvement in Detecting Epileptic Seizures." WSEAS TRANSACTIONS ON BIOLOGY AND BIOMEDICINE 20 (October 10, 2023): 132–39. http://dx.doi.org/10.37394/23208.2023.20.13.

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Bio-electrical time signals play a significant role in assisting non-invasive observational procedures in healthcare. These bioelectrical signals are weak signals with inherently low voltage and low frequency, hidden mostly under relatively large high-voltage noise signals. Hence it is extra challenging to analyze them. In modern clinical data analysis, these signals could be further analyzed using conventional machine learning (ML) methods. Also, in the recent past, two-dimensional spectrum-based classification, predominantly with Convolutional Neural Networks (CNN), has been tried with time-

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Melnyk, Mykhaylo, Roman Holyaka, Andriy Kernytskyy, Roman Vynarovych, and Mykhailo Shvarts. "Synthesis of a macromodel for a virtual signal simulator of adaptive acoustics." Vìsnik Nacìonalʹnogo unìversitetu "Lʹvìvsʹka polìtehnìka". Serìâ Ìnformacìjnì sistemi ta merežì 17 (June 2025): 203–13. https://doi.org/10.23939/sisn2025.17.203.

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This work is dedicated to the development of a macromodel for the virtual signal simulator of adaptive acoustics, Data@Sim, based on the formal analogy method. The structure of modeling electro- acoustic processes in adaptive acoustics tasks and approaches to the unification of research on electrical and acoustic signals are presented. An algorithm for synthesizing virtual signals that accounts for temporal parameters of sound wave propagation and attenuation, as well as noise and interference effects, is proposed. The model is implemented in the SPICE environment and enables verification of m

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DUMAURIER, Marie-Jeanne, Claudette PELASSY, Jean-Philippe BREITTMAYER, and Claude AUSSEL. "Regulation of the serine-base exchange enzyme system by CD4: effects of monoclonal antibodies, jacalin, interleukin 16 and the HIV membrane protein gp120." Biochemical Journal 329, no. 1 (1998): 49–54. http://dx.doi.org/10.1042/bj3290049.

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Phosphatidylserine (PtdSer) is synthesized by an exchange of the polar head group of phospholipids for a serine residue. The enzyme responsible for this reaction, the serine-base exchange enzyme system (serine-BEES) is inhibited during lymphocyte activation. We show here that triggering the CD4 cell surface molecule in several CD4+ T-cell lines regulates the serine-BEES activity, thus resulting in marked changes in PtdSer synthesis. CD4 ligands able to generate an activating signal in T-cells such as the lectin jacalin, down-regulate the synthesis of PtdSer. In contrast, monoclonal antibodies

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Heutschi, Kurt, Beat Ott, Thomas Nussbaumer, and Peter Wellig. "Synthesis of real world drone signals based on lab recordings." Acta Acustica 4, no. 6 (2020): 24. http://dx.doi.org/10.1051/aacus/2020023.

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There is a great interest in the generation of plausible drone signals in various applications, e.g. for auralization purposes or the compilation of training data for detection algorithms. Here, a methodology is presented which synthesises realistic immission signals based on laboratory recordings and subsequent signal processing. The transformation of a lab drone signal into a virtual field microphone signal has to consider a constant pitch shift to adjust for the manoeuvre specific rotational speed and the corresponding frequency dependent emission strength correction, a random pitch shift v

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