scholarly journals Development of a method of adaptive control of military radio network parameters

2021 ◽  
Vol 1 (9 (109)) ◽  
pp. 18-32
Author(s):  
Oleksii Nalapko ◽  
Andrii Shyshatskyi ◽  
Viktor Ostapchuk ◽  
Qasim Abbood Mahdi ◽  
Ruslan Zhyvotovskyi ◽  
...  
Keyword(s):  
Adaptive Control ◽  
Information Transmission ◽  
Time Scale ◽  
Search Space ◽  
Radio Network ◽  
Radio Communication ◽  
Evaporation Coefficient ◽  
Radio Communications ◽  
Network Parameters ◽  
The Military

A method of adaptive control of military radio network parameters has been developed. This method allows predicting suppressed frequencies by electronic warfare devices, determining the topology of the military radio network. Also, this method allows determining rational routes of information transmission and operating mode of radio communications. Forecasting of the electronic environment is characterized by recirculation of input data for one count, resampling on a logarithmic time scale, finding a forecast for the maximum value of entropy and resampling the forecast on the exponential time scale. The developed method allows choosing a rational network topology. The choice of topology of the military radio communication system is based on the method of ant multi-colony system. The main idea of the new option of ant colony optimization is that instead of one colony of the traditional ant algorithm several colonies are used that work together in a common search space. However, this procedure additionally takes into account the type of a priori uncertainty and the evaporation coefficient of the pheromone level. The proposed method allows choosing a rational route for information transmission. The proposed procedure is based on an improved DSR algorithm. This method uses several operating modes of radio communications, namely the technology of multi-antenna systems with noise-like signals, with pseudo-random adjustment of the operating frequency and with orthogonal frequency multiplexing. The developed method provides a gain of 10‒16 % compared to conventional management approaches

scholarly journals Justification of ways increasing the immunity of special purpose radio communications

2021 ◽  
Vol 2 (2(58)) ◽  
pp. 46-50
Author(s):  
Andrii Shyshatskyi ◽  
Vitalii Hasan ◽  
Mykola Kryvenko ◽  
Oleksandr Petrov ◽  
Serhii Kravchuk ◽  
...  
Keyword(s):  
Communication Systems ◽  
Queuing Theory ◽  
Noise Immunity ◽  
A Priori ◽  
Radio Communication ◽  
Radio Communications ◽  
Radio System ◽  
Radio Systems ◽  
A Priori Uncertainty ◽  
The Military

The object of research is the military radio communication system. One of the most problematic areas in the military radio resources management is the interference of military radio systems and facilities. A number of works have been devoted to the study of ways to increase the noise immunity of military radio communication systems and facilities. However, the known works contain some research results by scientists, which are aimed at increasing the noise immunity of military radio communication systems and devices and do not have a comprehensive approach. This work solves the problem of substantiating ways to increase the noise immunity of military radio communication systems and facilities. The scientific problem is solved by substantiating the methodological principles of increasing the noise immunity of military radio communication systems in conditions of a priori uncertainty. During the research, the authors used the main provisions of the queuing theory, the theory of automation, the theory of complex technical systems, as well as general scientific methods of cognition, namely analysis and synthesis. The novelty is that in the course of work: – the purpose of functioning of the noise protection system of military radio communication systems is formulated; – indicators and criteria for increasing the noise immunity of military radio communication systems have been determined; – decomposition of the solution of this problem into problems depending on the signal and noise situation is carried out. An approach based on the hierarchical decomposition of the networks functional structure, the behavior of which is described by stochastic differential (or difference) equations of the high dimension state, into a number of interconnected but simpler functional structures is used for the functional description of military radio communication systems. The proposed approach to describe the behavior of military radio systems will allow to decompose the military radio system state and increase the efficiency of decision-making to adjust operating modes and parameters in real time. The results of the research should be used at the stage of parameters operational management and modes of the system operation.

RUSSIAN MARKET OF PROFESSIONAL MOBILE RADIO AND CRITICAL COMMUNICATIONS: CURRENT STATE, PROBLEMS, PROSPECTS

2021 ◽  
Author(s):  
О.А. ШОРИН ◽  
Р.Ю. КАСПАРИ
Keyword(s):  
Information Transmission ◽  
Communication Networks ◽  
Communication Technology ◽  
Mobile Radio ◽  
Radio Communication ◽  
Russian Market ◽  
Critical Information ◽  
Current State ◽  
Telecommunications Market

Рассмотрены характеристики и аудитория сетей профессиональной радиосвязи и критических коммуникаций. Проведен анализ используемых в России технологий профессиональной радиосвязи и перспектив развития данного сегмента телекоммуникационного рынка, произведена оценка его объемов в пятилетней перспективе. Показано, что внедряемая технология широкополосной профессиональной связи МАКВИЛ не только решает назревшие проблемы, связанные с модернизацией морально и физически устаревших систем ведомственной и корпоративной транкинговой связи, но и открывает новые возможности роста рынка услуг передачи критически важной информации. The characteristics and audience of professional mobile radio and critical communication networks are reviewed. The analysis of professional mobile radio technologies used in Russia and the prospects for the development of this segment of the telecommunications market is carried out, as well as its volume is estimated in the five-year perspective. It is shown that McWiLL broadband professional radio communication technology not only solves the urgent problems associated with the modernization of morally and physically obsolete systems of departmental and corporate trunking communications, but also opens up new opportunities for the growth of the market for critical information transmission services.

scholarly journals Performance of Base Stations in Railway Digital Radio Communication Networks

2021 ◽  
Vol 19 (2) ◽  
pp. 41-48
Author(s):  
Yu. V. Nemtsov ◽  
I. V. Seryogin ◽  
P. I. Volnov
Keyword(s):  
Communication Network ◽  
Communication Networks ◽  
Base Station ◽  
Base Stations ◽  
Radio Communication ◽  
Radio Communications ◽  
Digital Radio ◽  
Cargo Transportation ◽  
Assess Quality

Base station (BS) is a terminal device of a radio communication network, while railway radio communications play an important role in ensuring safety of passenger and cargo transportation.A proposed method for calculating the performance of base stations in railway digital radio communication networks is intended to calculate for the BS the probabilities of being in certain state.BS was decomposed and such functional elements as circuit groups and a radio frequency path were identified, as well as the central module ensuring the exchange of information with elements of this BS and with other BSs. A detailed study of each element has increased accuracy of the proposed method. Following the Markov model, BS is presented as a system in which all possible states are considered. Models for BS with two and three circuit groups have been constructed. The parameters of each functional element of the model can be obtained through observation over a certain period. The solution of the system of equations for each of the models presented in the article will allow obtaining the values of the system being in a certain state. The obtained characteristics can be used to calculate the reliability of the entire radio communication network, and then to assess quality of service provided to the users of this network.Conclusions are made about the possibilities of using the obtained models when designing new railway communication networks and when calculating quality indices of existing ones. The proposed models can be applied not only to railway radio communication networks but also to mobile communication networks of commercial operators. 

Leading Others in the Digital Age

Head Strong ◽  
2020 ◽  
pp. 199-215
Author(s):  
Michael D. Matthews
Keyword(s):  
Social Media ◽  
Soft Power ◽  
Military Operations ◽  
Radio Communication ◽  
Mission Success ◽  
The Social ◽  
Chain Of Command ◽  
Negative Impacts ◽  
Social Use ◽  
The Military

The dominance of digital and social media in our lives presents opportunities both to enhance positive social influence and to interfere with it. Traditional military chain of command is rigid and evolved in the era before radio communication was possible. The ability to issue orders and plans in near real-time enables the speed of decision-making to be greatly increased, increasing the lethality of contemporary military operations. On the negative side, misuse of social media by individual solders can have devastating negative impacts at the strategic level. In this context topics of soft power and external manipulation of social media to disrupt morale are discussed. Psychologists may help the military better understand the positive use of information technology to achieve mission success and also develop training and other methods to mitigate against the social use of these technologies.

Interview with Todd Haynes

2017 ◽  
Author(s):  
Rob White
Keyword(s):  
Los Angeles ◽  
Family Background ◽  
Private Business ◽  
Radio Communications ◽  
Abstract Expressionist ◽  
Todd Haynes ◽  
Union Organizer ◽  
The 1950S ◽  
Set Up ◽  
The Military

Distillation of three phone interviews conducted by the author on November 3 and 22, 2011, and April 17, 2012.ROB WHITE:What is your family background?TODD HAYNES:My mom, Sherry Lynne Haynes, came from a middle-class Jewish family in Los Angeles. Her father, Arnold Semler, whom I called Bompi, and mother, Blessing, whom I called Monna, were a very supportive aspect of my upbringing. Bompi had worked in Warner Bros., starting as a messenger boy, becoming head of set construction. He was a union organizer and was close to many of the blacklisted figures in midcentury Hollywood. He left the studio in the later 1940s and set up a private business with his brother, making radio-communications devices for the military. He became very successful in the 1950s and ’60s. Monna studied harp and piano, and then when she was about fifty started painting in an abstract expressionist style. She was very progressive, went into psychoanalysis in the 1950s, and ...

Modeling of Diffraction Coupling in Radio Propagation Inside Tunnel Environments

2016 ◽  
Author(s):  
Arash Aziminejad ◽  
Andrew W. Lee ◽  
Gabriel Epelbaum
Keyword(s):  
Mode Conversion ◽  
Data Communication ◽  
Radio Propagation ◽  
Radio Communication ◽  
Data Link ◽  
Radio Communications ◽  
Propagation Modeling ◽  
Sharp Edges ◽  
Reliable Solution ◽  
Almost All

The overall performance of a Communication-Based Train Control (CBTC) system largely depends on the performance of its Data Communication Subsystem (DCS). The DCS network in almost all CBTC commercial system products marketed in the last decade utilizes radio communications in the open ISM bands (2.4 GHz or 5.8 GHz) to establish the bi-directional data link between the central/wayside and onboard segments. To ensure a stable and sound radio communication, a key question is the number of the wayside Access Points (APs) and locations of their antennas. Radio propagation modeling aims to provide an optimal and reasonably reliable solution to the cited question. The diffraction impact of sharp corners and edges in tunnels on the radio propagation process, however, has not been accounted for in majority of models. The purpose of the present research is to incorporate the effect of diffraction coupling due to sharp edges in tunnel sections which include geometrical discontinuities such as cross-junctions and L-bends through ray-mode conversion. The proposed modeling approach offers sufficient versatility to assimilate a variety of discontinuous geometries involving sharp edges in a tunnel environment. Numerical and empirical results suggest that the model provides an accurate tool for analyzing diffraction effects of tunnel discontinuities with sharp edges on the process of radio propagation.

Sign in / Sign up

Export Citation Format

Share Document