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The paper deals with an analytical model of the transmitter-blocking technique for mitigating short-time fades on free-space optical links. Due to the effect of atmospheric turbulence, the optical channel is characterized by received power fades in the order of tens of milliseconds, during which the transmitted data is lost. Under certain conditions, the propagation through turbulent channel is reciprocal,...
This paper describes Network Enabled Capability (NEC) within Command & Control (C2) systems. In the first part we present the need to transform military operations of Industrial Age to Information Age military operations and the related NCW (Network Centric Warfare). In the next part of the paper we discuss OODA (Observe, Orient, Decide, Act) Loop as a means of optimizing NEC within Command &...
The paper describes the state-of-the-art of Long Short-Term Memory (LSTM) neural networks with fixation to context utilization in text documents. Context in text documents is utilized mainly in the natural language processing, machine reading, but also in other areas, for example in the information retrieval. In the areas where the context is taken into account, the LSTM finds wide appliance because...
Adaptive processing of radar data in a data processor is the processing of radar data using adaptive, cognitive, intelligent or smart filtering. Filters or so-called filter banks are used for filtration. We can observe, track and display targets captured by radar with these filters included. These filters also serve to process the tracked targets (distance, course, flight level, speed, measurement...
This article deals with a noise analysis of inertial sensors, especially with accelerometers. Accelerometers and gyroscopes are inertial sensors which are parts of inertial measurement units IMUs. An inertial navigation uses outputs from three accelerometers and from three gyroscopes to positions, orientations computations. For better accuracy of navigation and guidance systems is necessary to evaluate...
SNAP is a program for symbolic analysis of linear or linearized circuits and systems developed at Brno University of Technology, provided as freeware. The paper presents a new version of the program, which contains a new schematic editor and rewritten simulation engine. A unique property of SNAP is a system of libraries that allows user definition of new behavioral models, including non-electrical...
The collection and analysis of event logs allows detection and debugging of operating system and application configuration errors. An appropriate selection of event logs allows you to detect cyber-attacks and prevent potential damage. In the article, we focused on the selection and optimization of event logs for the Microsoft Windows operating system. We have experimentally verified the structure...
Presented paper explains general purpose approach to the parallel pixel processing on GPU. It presents essential dataset structuring, correct type assignment and kernel configuration for CUDA application interface. Paper also explains data movement and optimal computation saturation. Transfers are also analyzed in correlation with the computation especially for the embarrassingly parallel problem...
Presented paper deals with a model of the electromagnetic sources localization in near-field sources region and verification of selected algorithms for correct modelling estimations. The localization is performed from cross-correlation matrix of planar sensors network signals and further cross-correlation matrix decomposition — Multiple Signal Classification (MUSIC). The whole mathematical model from...
In the paper are analyzed articles that are indexed on Web of Science with the main topic of the conference “Communication and Information Technologies” (CIT). The articles were chosen the most cited ones. The first step of analysis summarizes statistics of the articles and the second step was oriented to detailed analysis using the software Tovek Tools. The contextual analysis was depicted in the...
Time Difference Of Arrival (TDOA) method is very often used inside electronic intelligence systems. TDOA method requires the high signal to noise ratio at the output of the intermediate frequency amplifier for target localization, usually around 12 dB or more. At low signal-to-noise ratio TDOA is inaccurate and especially in case of the active jamming it is nearly impossible. The multilateral TDOA...
This work deals with theory of PI controller and short introduction to DSP implementation. It starts with the most necessary information about mathematics and design of controller applicable to DC motor controlling using the inverse dynamic control method. Then MatLab Simulink is used to verify obtained results following with description of conversion from continuous controller to a discreet one....
Security of today communication networks depends also on effective hash function. A cryptographic hash function is used to realize a transformation of input to a fixed-size value. This value is called the hash value. One way hash function could be generated also by an artificial neural network (ANN). Theoretical analysis of the possibility of using artificial neural network and chaotic maps for hashing...
Processing of information from the sensors and the resources available to the commander are very important for his decision-making process. Quality of information for decision-making process has a great importance. This article focuses on the description of the modeling of signal processing from sensors in a probabilistic model of recognition Custom / Foreign Identification Friendly or Foe and access...
Automatic Modulation classification lays important role in the systems of electromagnetic spectrum monitoring. However performance of the algorithms is depreciated due to inaccurate estimation of signal parameters. The problem of unknown parameters is well documented in the literature however, authors usually propose improved algorithms in order to maximize probability of correct classification when...
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