In this paper the DOA estimation of Wi-Fi signals is consider based on their cyclostationarity property due to the digital modulation. The cyclic autocorrelation and complementary cyclic autocorrelation characteristic...
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The article is devoted to determining the parameters of a dispersion distortion compensation device. Dispersion compensator device is based on digital filter bank, and main parameter needed to determine is number of c...
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This paper presents a method for calculating the quality of the estimation of the filter coefficients of the corrector of a hybrid filter bank, based on the error of the indirect estimation of the amplitude and phase ...
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This paper presents a method for calculating the quality of the estimation of the filter coefficients of the corrector of a hybrid filter bank, based on the error of the indirect estimation of the amplitude and phase of the equalizer coefficients. To confirm the correctness of the theoretical expressions, a hybrid filter bank was simulated with the addition of white Gaussian noise in the calibration path at different SNR values.
In cellular communication systems, the distance from base station to subscriber equipment is limited. In cases where this distance cannot be reduced, it is suggested to introduce a repeater using a location detection ...
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In cellular communication systems, the distance from base station to subscriber equipment is limited. In cases where this distance cannot be reduced, it is suggested to introduce a repeater using a location detection method, such as GPS, to increase the range. The distance between the nearest base station and the repeater maybe calculated by determining the coordinates of the repeater and the base station. By increasing the power of both the repeater and the base station transmitters, and changing the time advance, the repeater may be connected to the base station. The connection between the subscriber terminal and the base station is facilitated through the repeater.
This article discusses the importance of recognizing human behavior in the modern world. Several main companies are considered and compared with each other on products from different manufacturers engaged in the devel...
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This article discusses the importance of recognizing human behavior in the modern world. Several main companies are considered and compared with each other on products from different manufacturers engaged in the development of software for human behavior recognition. Article proposes methodology for recognizing human emotions on photo and video. Methodology is based on YOLOv4. Proposed algorithm recognizes seven types of human emotions. Our methodology can be used in different industry companies to analyze employees' actions at workplace.
Currently, there is no method for assessing the quality of information audio signal transmission over the transmission channel. According to Russian National Standard (GOST), simple stationary test signals should be u...
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Currently, there is no method for assessing the quality of information audio signal transmission over the transmission channel. According to Russian National Standard (GOST), simple stationary test signals should be used for channel evaluation. II additional processing devices should be disabled, while test signal is applied. Compact representation of signal and it's effect of signal quality are ignored. Based on the results of the research carried out by the authors, it is possible to determine the relationship between the change in a number of objective parameters and the subjective quality assessment from real listeners.
In this paper, the solution is proposed to the problem of synthesis of a core network for communication systems connecting information processing nodes in regional traffic control systems in air and ground transportat...
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In this paper, the solution is proposed to the problem of synthesis of a core network for communication systems connecting information processing nodes in regional traffic control systems in air and ground transportation infrastructure distributed over a large territory, at considerable distances from each other. Results are obtained for calculation of core network parameters depending on its structure. The tasks of network structure synthesis are given. The results can be useful to developers and administrators of large network communication systems.
The article considers the possibility of applying the principle of unbundling in the thermal calculations of onboard signal processing devices. It is established that when performing such calculations, the problem of ...
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The article considers the possibility of applying the principle of unbundling in the thermal calculations of onboard signal processing devices. It is established that when performing such calculations, the problem of large time expenditures inevitably arises, as well as the need for a large number of system resources. The estimation of machine time and system resources costs is made in the case of splitting a General task into a number of subtasks on the principle of unbundling. A method is proposed for moving from lower-level tasks to higher-level tasks, taking into account the docking parameters. The estimation of saving of machine time and system resources costs is made when using the proposed principle of unbundling.
The issues of minimizing the resampling distortions in the sound transmission signal transmission channels are considered. The main reasons for the appearance of distortions of the real signal when changing the sampli...
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In this paper we discuss the problem of establishment of estimated parameters limits for on-board radio electronic equipment. An indicator of compliance with a multi-parameter electronic equipment is proposed, based o...
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In this paper we discuss the problem of establishment of estimated parameters limits for on-board radio electronic equipment. An indicator of compliance with a multi-parameter electronic equipment is proposed, based on minimizing the dimension of the vector of parameters that directly determine the objective function, approximating the tolerance region by hyperplanes, taking into account changes in parameters during operation. The correspondence indicator has the form of a hyperparallelepiped, and when assessing the correspondence, both the location of the point of the state space inside the parallelepiped and the distance from the point of the state space to the reference plane (the face of the hyperparallelepiped) can be determined. The example of using the developed indicator for analyzing the movement of an aircraft in an air corridor is proposed.
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