The problem of accuracy and reliability of measurement results of on-board measuring radio-electronic equipment is considered. The analysis of the accuracy of the measurement of the range by a radio frequency range st...
详细信息
ISBN:
(纸本)9781538656235;9781538656228
The problem of accuracy and reliability of measurement results of on-board measuring radio-electronic equipment is considered. The analysis of the accuracy of the measurement of the range by a radio frequency range station placed on a mobile object under the influence of interference is carried out. We show that there is a nonlinearly increasing dynamic error if the optimal filter was constructed without taking into consideration of the elements nonideality. So precision of distance measurement of mobile radio-range station depends on the interference. This example emphasizes the importance of the quality problem of components used in on-board equipment and establishing tolerances for component parameters.
The new class of modified Lorenz system based pseudorandom numbers generator, realized in Galois field was considered. Modification is based on realization of Lorenz system in Galois field and making all operations of...
详细信息
ISBN:
(纸本)9781538656235;9781538656228
The new class of modified Lorenz system based pseudorandom numbers generator, realized in Galois field was considered. Modification is based on realization of Lorenz system in Galois field and making all operations of sum and multiplying in these fields. Perfection and depreciation of digital element base does actual realization of shapers of multilevel chaotic signals on the basis of algorithms of the numerical decision of systems of the differential equations describing systems with dynamic chaos. In article the analysis of statistical characteristics of a new class of pseudorandom numbers generator is carried out. Base statistical properties of modified Lorenz system based pseudorandom numbers generator, realized in Galois field were estimated. Correlation intervals of signals were estimated. Probability distributions of the generated numbers are considered.
The paper considers some practical aspects arising from the use of "transparency windows" (range of symbol time durations of information sequence when error probability per symbol due to intersymbol distorti...
详细信息
ISBN:
(纸本)9781538656235;9781538656228
The paper considers some practical aspects arising from the use of "transparency windows" (range of symbol time durations of information sequence when error probability per symbol due to intersymbol distortion is zero) to increase spectral efficiency in radio communication systems using multiposition phase-shift keyed signals with n discrete states. The functioning of communication systems was analyzed in the presence of frequency detuning and error produced by phase meter for various amplitude-frequency responses of a linear radio path. The admissible operating conditions and gains in information transfer rate of such systems are determined.
Number of moving objects (satellites, aircrafts, trains, vehicles and so on) rises continuously in the space at earth surface and nearby. This space is filled by radiation and electromagnetic fields of natural and art...
详细信息
ISBN:
(纸本)9781538656235;9781538656228
Number of moving objects (satellites, aircrafts, trains, vehicles and so on) rises continuously in the space at earth surface and nearby. This space is filled by radiation and electromagnetic fields of natural and artificial sources. The external electromagnetic fields have an influence upon communication equipment and instruments of moving objects, that can to pose severe hazard to them. The most troubles are brought by lightning discharges, that are source of current, fields, x- and gamma-emission. In this paper there are some aspects of possible impacts considering.
The Industry 4.0 actively changes the existing technological paradigm. The IoT, USN and Big Data together form the basis of the Cyber-Physical systems, the main driver of the Industry 4.0 world. Meanwhile, we still de...
详细信息
ISBN:
(纸本)9781538656235;9781538656228
The Industry 4.0 actively changes the existing technological paradigm. The IoT, USN and Big Data together form the basis of the Cyber-Physical systems, the main driver of the Industry 4.0 world. Meanwhile, we still depend a lot on a human operator inside the complex systems. The research of auditory representation, i.e. sonification, can provide us the new forms of data and systems monitoring. The paper presents the results of the research of sonification application to the cyber-physical systems.
The fiber-optic data transfer systems spectral efficiency factor widening conception is proposed. Two kinds of signal transmission rate, - bitrate and baudrate, - and two kinds of spectrum definitions, - frequency and...
详细信息
ISBN:
(纸本)9781538656235;9781538656228
The fiber-optic data transfer systems spectral efficiency factor widening conception is proposed. Two kinds of signal transmission rate, - bitrate and baudrate, - and two kinds of spectrum definitions, - frequency and wavelength, - are being analyzed associated with the spectral efficiency factor. Four modifications of spectral efficiency are designed based on four pair transmission rate - spectrum combinations. In addition to the classic spectral efficiency SE the combination set includes: baud efficiency BE, spectral - wavelength efficiency SWE and baud - wavelength efficiency BWE. The transmission rate influence on spectral efficiency factor modifications is being analyzed. Conception of complex multiplexing is being used for fiber - optic data transfer systems transmission rate forming mechanism modeling.
B The article describes a hierarchically distributed way of storing and processing mobile subscribers location information. Proposed a method to determine the time of information search about the mobile subscriber loc...
详细信息
This article discusses the trends in modern communication networks, combining both elements of fixed access and elements of communication with mobile subscribers. The article analyses the difficulties of network manag...
详细信息
Currently, the main communication means and management of the participants behavior in mass events, including unauthorized ones, are portable mobile devices, through which, in the social network framework a, text mess...
详细信息
The Shannon performance express-evaluation algorithm is considered on the assumption that network interfaces Fast Ethernet signal transmission cable channel is constructed on electrically conductive symmetrical hardwa...
详细信息
暂无评论