34 Result(s)
within
A. S. Dmitriev
Physics
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Article
Scattering of Linear Waves on a Soliton
We have shown that the wave scattering by a soliton of nonlinear Schrödinger equation occurs in a peculiar way. The nonlinear interaction leads to the generation of waves with frequencies that are multiples of...
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Article
Experimental Model оf a Multibeam Device for Observation in Radio Light
The possibility of creating an analog of the biological eye in the radio range for observing the surrounding space in artificial radio light is considered. As in the biological prototype, the analog has a syst...
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Article
Multiuser Access in Systems of Differentially Coherent Information Transmission Based on Chaotic Radio Pulses
The possibility of organizing multiuser access based on the differentially coherent information transmission scheme using chaotic radio pulses as data carriers has been demonstrated. Some theoretical estimates...
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Article
Measuring the Distance between an Emitter and a Receiver in the Wireless Communication Channel by Ultrawideband Chaotic Radio Pulses
The possibility of wireless distance measurement using ultrawideband chaotic radio pulses on the basis of the statistical signal analysis is discussed. The results of experimental verification of the proposed ...
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Article
An Experimental Cell for a Radio Light Receiver
The problem of creating a receiver for incoherent microwave radiation from sources realized on the basis of ultra-wideband oscillators of chaotic oscillations and objects and surfaces “illuminated” by these so...
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Article
Radio-frequency illumination sources based on ultrawideband microgenerators of chaotic oscillations
The task of wideband illumination of objects and surfaces by radiation from artificial noncoherent microwave sources with the aim of subsequent observation by radiometric equipment is considered. The main prob...
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Chapter and Conference Paper
Ultrawideband Microwave 3–7 GHz Chaotic Oscillator Implemented as SiGe Integrated Circuit
Structure of chaotic generator is proposed that provides chaotic oscillations with required form of signal spectrum. A model system on 0.25- \({\upmu }\) m SiGe component library is developed, and IC layout is...
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Article
Formation of ordered nano- and mesostructures in silicon irradiated with a single femtosecond laser pulse in different environments
We report on a new class of ordered nano- and mesostructures, including distinct structured areas with subnanoscale roughness, produced by interaction of single tightly focused femtosecond laser pulses with a ...
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Article
Thermal training of functional surfaces fabricated with femtosecond laser pulses
The effect of thermal training of a functional surface fabricated by means of femtosecond laser surface processing on a crystalline silicon (c-Si) surface is found for the first time. Hydrodynamic and thermal ...
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Article
A new regime of nucleate boiling in microsphere mesostructures: Jum** pool boiling
We have studied a new regime of nucleate boiling in distilled water on substrates representing mesostructures of monodisperse and/or polydisperse microspheres made of various materials. It is experimentally es...
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Article
A microwave chaos generator with a flat envelope of the power spectrum in the range of 3–8 GHz
A promising type of ultrawideband (UWB) signals for communications and radar techniques operating in an unlicensed frequency range of 3.1–10.6 GHz, which has been actively developed in recent years, is offered...
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Chapter
Evaluation of the Number of Keys in a Chaotic Cryptographic Method
Data stream coder based on chaotic synchronous response is considered. An estimate of the number of keys available in this scheme is obtained by cascading the basic building block of the system and thus repeat...
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Article
Generating dynamic microwave chaos in self-oscillating ring system based on complementary metal-oxide-semiconductor structure
We have designed, implemented, and studied a chaotic self-oscillating system based on a monolithic integrated circuit on a silicon substrate. Experimental prototypes demonstrated stable generation of chaotic m...
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Article
Dynamic chaos in the microwave range generated in SiGe-based autooscillatory structure
A chaotic microwave autooscillatory structure has been designed, implemented on a monolithic IC manufactured by 0.25-μm silicon-germanium technology, and studied. The experiments with the IC showed the possibi...
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Article
Chaotic RF pulses generated by a periodically driven oscillator
The effect of a periodic drive signal on a chaotic rf oscillator is considered. The possibility to obtain chaotic pulse trains (rf pulses) of a preset duration is experimentally demonstrated.
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Article
Chaotic pulse trains generated by a dynamical system driven by a periodic signal
Chaotic pulse trains (rf pulses) can be generated by a dynamical system driven by a periodic signal. This possibility is demonstrated using a generator of chaotic oscillations with 2.5 degrees of freedom. By c...
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Article
Ultrawideband direct chaotic data transmission in the microwave range
A method of wireless, high-rate, direct chaotic transmission of digital data is proposed. The method is based on the use of ultrawideband chaotic oscillations generated directly in the microwave range. Experim...
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Chapter
Basic Principles of Direct Chaotic Communications
Basics of the theory of direct chaotic communications is presented. We introduce the notion of chaotic radio pulse and consider signal structures and modulation methods applicable in direct chaotic schemes. Si...
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Article
Chaotic synchronization of henon map**s: The information approach
A new scheme of chaotic synchronization, whereby information concerning the state of a guiding system is transferred to the guided system without using a formalism of the symbolic dynamics, is proposed. It is ...
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Article
Chaotic tags and asynchronous data transmission
A method to identify entities by means of tags is suggested. The tags are represented by sets of unstable periodic orbits that form the framework of a chaotic attractor. The method is applied to asynchronous p...
