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We introduce the fast digital algorithms for the coherent demodulation of binary and four position differential phase-shift keyed signals. These algorithms can be practically implemented with the minimum number of simple arithmetic operations over the input signal period and they are is fully compatible with the modern hardware components available. We obtain the timing diagrams of the demodulators...
We consider the advanced digital noncoherent demodulator of "integrally" coded binary phase-shift keyed signals. This demodulator requires carrying out the minimum simple arithmetic operations over the input signal period. We study its noise immunity, and we show that for relatively short codes “integrally” demodulation leads to considerable gain in comparison with step-by-step demodulation...
A brief survey of the present day investigations in the field of magnetically ordered nanocomposites is represented. The special attention is paid to magnetometry and NMR of cobalt multilayers and dispersed structures. In the original part of work the fabrication methods and physical properties of two kinds of materials are considered: (i) thin ferrimagnet/superconductor structures and (ii) dispersed...
The quantum chemistry software ParaGauss, which implements various density functional methods to determine the electronic structure of molecular systems, has been ported to and optimized for the use on the Hitachi SR8000 supercomputer platform at Leibniz Rechenzentrum München. The effort focused on tuning the code and extending it by methods that allow the simulation of molecules in an environment,...
We are to introduce the basic fast digital coherent demodulation algorithms for the radio signals with various modulation formats, the ones that require the minimum number of simple arithmetic operations. We are demonstrating how they provide the implementation of the demodulators of the phase-shift keyed and the amplitude-modulated signals. We have determined the expressions for the probabilities...
We considered the modeling problem of radio wave propagation processes indoors. We generalized all physical phenomena influencing the result. We also suggested the model for the radio-wave attenuation calculation and studied a radiowave attenuation into lossy dielectric. As a result, we obtained the analytical expressions that makes it possible to calculate a radio wavefront (angle of refraction),...
We have developed a pilot high-speed device for protection of AC HV transmission lines and electrical distribution plants of 110 kV from very high short circuit currents up to 80 kA. This device being named as the high-voltage high-speed commutator (VBK-110) is designed on module principle. Each unified module contains a powerful triggered vacuum switch (TVS) of RVU-53-type controlled by a powerful...
The innovative electric motor concept is presented. The main feature of the novel concept is accommodation of relatively large axial channels in a slim electric motor without sacrificing its torque density and radial dimensions. The motor is analyzed and the analysis is then validated by the experiments. The resulting motor performances are given and applications for the motor proposed.
Structure optimization and the results of the functional modules development for high power modulator for klystrons, magnetrons, gyrotrons and other microwave vacuum devices are under discussion. Main goal is in the increasing of pulse form stability, breakdown protection and modulator's energy efficiency. The fields of preferable application for basic types of power switching devices in high power...
We report new design of solar panels with application of single and multi-junction solar cells (SC) based on GaAs/Ge, GaInP/GaAs/Ge located on mesh semi-rigid frames. Earlier the similar frames were used in development of many types of SA based on mono-Si for Russian spacecrafts. Their application in case of highly effective SC based on GaAs/Ge, GaInP-GaAs/Ge is considered for the first time and is...
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