Алгоритм поиска глобального максимума при вычислении оценок местоположения источника радиоизлучения пассивной радиолокационной системой
This paper is devoted to modern approaches to development of new positioning algorithms which will guarantee the achievement of the minimum mean square error and do not create excessive computing load. The algorithm performing the search of global extremum in problems of source position estimation using one-step methods based on a likelihood function for two types of passive radar systems was proposed. The first system is a passive radar system consisting of narrow-base subsystems; the second system is the combined passive radar system which includes several narrow-base subsystems together with a wide-base passive radar system.
According to results of computer simulation, the analysis of the frequency of appearing abnormal errors and relative time spent on calculations was made. The comparison performed using the proposed algorithm with an adaptive step and a universal method of global extremum searching, that is “particle swarm”, showed that the developed algorithm requires up to 20 times less computational costs and vanishes abnormal errors.
The 11th International Conference on Security and its Applications (CNSA 2018) was held in Zurich, Switzerland, during January 02~03, 2018. The 5th International Conference on Data Mining and Database (DMDB 2018) and The 5th International Conference on Artificial Intelligence and Applications (AIAP 2018) was collocated with The 11th International Conference on Security and its Applications (CNSA 2018). The conferences attracted many local and international delegates, presenting a balanced mixture of intellect from the East and from the West. The goal of this conference series is to bring together researchers and practitioners from academia and industry to focus on understanding computer science and information technology and to establish new collaborations in these areas. Authors are invited to contribute to the conference by submitting articles that illustrate research results, projects, survey work and industrial experiences describing significant advances in all areas of computer science and information technology.
This article presents a method of the automated control of distributed radio direction finding system (RDFS) providing the construction of an automated system of technical diagnostics and recovery of distributed RDFS performance on the specified requirements. This dual-circuit method includes diagnosing and reliability operations, redundancy recommendations, and also control algorithms of the constituent elements of the system. The structure and mathematical apparatus of the operations, recommendations, and algorithms of the proposed method are shown. The basic requirements and restrictions under which the construction of automated technical diagnosis system is carried out are specified.
Issue of identification emergency electrical discharge for electrical network is studied. Structure chart of detector is shown. Algorithm of DSP module is offered. Timing diagram of identification process and realization example of algorithm in Matlab is given
The existing device repacking data streams and options for their implementation as application specific integrated circuits, so on the FPGA is studied. Revealed their limitations and shortcomings of the synchronization of the data flow transformation. A device universal repacking data streams is offered. The function chart and timing diagrams of his work is shown.
The algorithm for searching the global maximum of the objective function for increasing the speed of operation of a one-stage algorithm for estimating the location of the radio source of a passive distributed wide-band radar system is developed and investigated. The problem is solved by the transition from the universal gradient method of searching for a global maximum to a search of the values of functions over a sufficiently dense grid in the search domain and further refinement by the methods of searching for a local extremum. The condition for choosing the minimum sufficient step of discretization of space is formulated and three strategies for choosing a step are proposed: homogeneous, heterogeneous and adaptive. Estimates of the gain in run-time and the frequency of occurrence of anomalous errors are given.
Provides an overview of the different ways to implement the high-speed I/O data to the PC using FPGA based on the use of commercially available modules. The possibility of developing a specialized unit that provides the present-simplification of the equipment.
Proceedings of 2018 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom)
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.