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Analysis of the effectiveness of metamaterials as a substrate of microstrip antennas for the purpose of providing broadband antenna while reducing the size and increasing the antenna gain are carried out in the report. As an example of the calculation of a microstrip antenna characteristics are given in which the substrate is a metamaterial unit cell in the form of nested open rings (SRR — split ring...
This paper addresses the problem of incident response in clouds. A conventional incident response model is formulated to be used as a basement for the cloud incident response model. Minimization of incident handling time is considered as a key criterion of the proposed cloud incident response model that can be done at the expense of embedding infrastructure redundancy into the cloud infrastructure...
The paper discusses some of the issues on creation of mobile communication systems of the fifth generation. In particular, issues relating to the selection of the frequency range, features of the OFDM modulation and spectrum sharing. In the context of the selection of the operating frequency range for the 5G mobile communication systems mm-wave propagation principles are considered. Experimental results...
Communication channel model based on the real characteristics of the base station equipment with the MIMO technology and subscriber user equipment is presented in the article. The capacity and accuracy of channel estimation, communication are investigated using MatLab package. The communication channel is modeled by N base station antennas and a subscriber unit antenna. The input data for analysis...
The article examines the problem and characteristics of contact less measurement technique of the vibration movement amplitude of the test material point along the z-axis of the object surface. In the article the error assessment of vibration measurements is determined. The authors describe overview and the results of experimental studies.
Differential clock cross point correction method is presented in this paper. The proposed method provides differential clock with minimum crossing error over PVT, which is needed to improve noise immunity of Pipeline ADC. As Pipeline ADC work with differential clock, so crossing error of differential clock could decrease noise immunity. Cross point correction method also helps to avoid setup/hold...
In this paper for implementation of IIR digital filters, it is offered to use structures, which have a number of degrees of freedom significantly more than a number of degrees of freedom of transfer function. Such redundancy allows reducing a length of a fractional part of the filter coefficients without loss of accuracy of transfer function implementation.
The paper is devoted to the mutation testing technique that is widely used when testing different software tools. This paper presents a comparative analysis of two mutation testing tools for Java programs, namely Pitest and /Java. They both allow automatically introducing faults into a software code. The analysis has revealed their pros and cons, as well as specific features of their launch and application...
In modern System on Chips (SoCs) different blocks may use clock signals with different frequencies, in which case SoC is said to have multiple clock domains. The signal that travels from one clock domain to another needs to be synchronized in the receiving domain to prevent occurrence of metastability phenomenon, i.e. a degradation of a signal. Synchronization is implemented by so called synchronizing...
The efficiency of the compression parameters of video control method is directly related to the number of parameters. Namely, the time required to process each of the frames, and the possibility of considering the peculiarities of the processed frames content. This article describes factors that affect the value of the transmission delay and explores improving aspects for the performance parameters...
The paper presents approaches to electro-dynamic characteristics estimation for artificial composite media, among which a periodic random media are especially distinguished. Resonant circuit implementation based on thin-film ferromagnetic nanostructures is possible in a periodic composite media. Chiral media, photonic, magnonic crystals and layered structures are of particular interest. Approaches...
Due to the complexity and large dimensions of the task of digital system design debugging decomposition by method of modeling as a whole, algebraic models of decomposition methods are proposed, namely, methods of vertical and horizontal structure decomposition, functional decomposition, decomposition based on error types. An algebraic model of the digital systems software is presented. The software...
The article describes a unique public informational Internet resource — the portal of next generation networks multi-service platforms of domestic and foreign manufacturers, used in Russia. The above objectives and opportunities of the portal, shows the architecture of a software system and the structure of the database of the portal. The portal is applicable for a broad range of telecommunication...
Statistical characteristics of the density distribution of the instantaneous frequency of deep fading signals were defined. The threshold method for measuring of motion speed of the extended object within range radio measuring instrument movement device reviewed and analyzed. It is shown that applying of the Doppler signal in the amplitude selection channel can significantly reduce the phase noise,...
Estimation of potential accuracy of the measurement of informative signal parameters on background of non-Gaussian additive noise was obtained. Engineering estimations of the informative signal parameters on the background of additive non-Gaussian noise, with correlated nature were found.
This paper deals with a precise time, particularly comparison of diverse precise time transfer methods and sources. We deal with two ways of the precise time acquisition — the dedicated time and frequency transfer infrastructure and the time network protocols. For the needs of distinct time and frequency methods evaluation, we designed a FPGA based System on Chip (SoC) that may acquire time and frequency...
Traditional scan based transition delay fault tests can potentially miss variability induced delay faults on long interconnects. On the other hand, an ATPG may not be successful in deriving test patterns for all paths. The paper proposes a BDD based synthesis method where all the paths are testable under the path delay fault model without addition of extra inputs. Each ROBDD (Reduced-Ordered-Binary...
The paper deals with one of the most important optimization problem — the cutting stock and packaging (C&P) problem. This problem contains two sub problem, such as two-dimensional packaging problem and minimization of the tool head way, which belong to the class of NP-hard and complex problems. The formulation and restrictions of the C&P problem are considered in the paper. Authors offer a...
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