Gotowe bibliografie tematyczne / Radio (telecommunication system)

Gotowa bibliografia na temat „Radio (telecommunication system)”

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Data publikacji: 26 lipca 2024

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Artykuły w czasopismach na temat "Radio (telecommunication system)"

1

Cohen, R. J. "Radio Astronomy and the Radio Regulations". Symposium - International Astronomical Union 196 (2001): 220–28. http://dx.doi.org/10.1017/s0074180900164137.

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This article gives a brief introduction to the status of radio astronomy within the International Telecommunication Union (ITU), the body which coordinates global telecommunications. Radio astronomy entered the ITU arena in 1959 as a relative latecomer. By its nature, radio astronomy does not fit into the ITU system very well: regulators are hoping to facilitate commercial development of the radio spectrum, whereas astronomers are hoping to retain quiet frequency bands through which to study the Universe at ever higher sensitivity. Nevertheless there are major long-term goals which radio astronomers can realistically hope to achieve via the ITU in the years ahead, including more favourable frequency allocations and better regulatory protection. The prospects for radio astronomy at the forthcoming World Radio Conference WRC-2000 are reviewed. It is vital that radio astronomers participate in force at this WRC.
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Sova, Oleg. "Analysis of conditions and factors affecting cyber security in the special purpose information and telecommunication system". Technology audit and production reserves 4, nr 2(66) (25.07.2022): 25–28. http://dx.doi.org/10.15587/2706-5448.2022.261874.

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The increase in the number of cases of failure of information and telecommunication networks due to cyber attacks determines the need to protect them from this type of attacks. The issue of increasing cyber security in the conditions of conducting operations by groups of troops (forces) is very important. Due to the armed conflict in the East of Ukraine, the military-political instability in the Middle East, the struggle for influence on world financial and energy flows, the global military-political instability is intensifying. This is due to an increase in the number of communication devices in information and telecommunication networks, as well as an increase in the number of possible attacks that can be used to disrupt the operation of an information and telecommunication network. Considering the above, the object of research is a special purpose information and telecommunication system. The subject of research is cyber security of a special purpose information and telecommunication system. Classical methods of scientific knowledge, namely analysis and synthesis, were used during the research. The research identifies factors that affect cyber security in a special purpose information and telecommunications system. All this must be taken into account while planning and deploying a special purpose information and telecommunication system. The analysis of the consequences of the impact on the information and telecommunications system of special purpose of modern devices of defeat and the impact of devices of radio-electronic suppression and other factors was carried out. A typical special purpose information and telecommunication system does not fully meet the requirements for constant readiness to ensure the management of troops (forces), stability, mobility and throughput. A formalized description of the task of improving cyber security in a special purpose information and telecommunications network is provided. The components that affect the level of cyber security of the special purpose information and telecommunication network during the group's operations have been established. The impact of the specified conditions and factors must be reflected: in the planning documents during the planning of the deployment and operation of the group's information and telecommunications system; in the software, during operational management.
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Promise E.I., Egho, Finu C. P., Kponyo D, Amankwah John i Adu Mensah S. "E-TELECOMMUNICATION INFORMATION SYSTEM". International Journal of Research -GRANTHAALAYAH 8, nr 8 (12.09.2020): 403–12. http://dx.doi.org/10.29121/granthaalayah.v8.i8.2020.1181.

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The transmission of traffic either in form of voice or data from a source to destination over a transmission media such as fiber cable or digital microwave radio is termed telecommunication. The telecommunication is classified into three categories namely: Access network, core network and transmission system. The access network directly provides network services to the subscribers. The core network does the routing or switching of traffic from the source to destination over the transmission media while the transmission system provides the media through which the traffic is transmitted from source to the destination. In this study, an automated web-based application name an E- Telecommunication Information System (ETIS) will be designed and developed to provide accuracy and consistence of network data, reduce Mean Time To Restore (MTTR) faulty equipment, increase revenues from cell sites and improve customers satisfaction in the telecommunication industry. Qualitative research approach and qualitative research method will be adopted so as to achieve reliable objectives of the system.
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Kazmina, I. V. "The main trends in the development of information and telecommunication technologies when creating high-tech products". Proceedings of the Voronezh State University of Engineering Technologies 81, nr 4 (11.02.2020): 291–97. http://dx.doi.org/10.20914/2310-1202-2019-4-291-297.

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The features of the application of information and telecommunication technologies in high-tech enterprises are examined in order to increase the efficiency of production activities. It is determined that the basis of telecommunication technologies is the procedure for information exchange and data transfer. Telecommunication technologies provide remote transmission of all forms of information, including data, voice, video, between computers via various types of communication lines. Analysis of the results of the classification of information technologies and areas for improving information support in the production of high-tech products allowed us to identify trends in the development of modern information technologies. These trends are due to the dynamics of the development of industrial enterprises and the external environment, which leads to functional changes in the management system of a high-tech enterprise and provides significant economic growth in developed countries. The main promising means for data transmission are the Internet, wireless mobile radio networks, laser and fiber-optic communication lines. The most important task of telecommunication technologies in the field of economics is electronic exchange. This indicates the importance of the telecommunications aspect in the functioning of the information system. Telecommunication technologies that provide data transfer, make it possible to implement a continuous exchange of information through global networks. Modern telecommunication technologies are widely used in creating network options for information technology. It was determined that a significant achievement of telecommunication technologies was the possibility of real-time control of financial, banking, trading and other operations regardless of the territorial location of their participants. Telecommunication technologies are becoming the elements that informally unite the vast territory of Russia.
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Korde, Nikhil, i Dinesh Rojatkar. "A Survey on Transferring Standards of GSM-R in Railway Sector". International Journal of Advance Research and Innovation 5, nr 1 (2017): 101–5. http://dx.doi.org/10.51976/ijari.511717.

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GSM-Railways (GSM-R), which is evolutionary railway mobile communication technology, are gradually replacing analogue radio systems. Although GSM-R is an impossible achievement in terms of European railway interoperability, from a telecommunication point of view, it is successive technology. This study present the transfer of a telecommunication standard to another railways and it studies whether the adoption of an upgraded version of the GSM standard (GSM‐R) turned out to be an efficient choice. The transfer and deployment of GSM‐R is technically importance to the success of another European railway project. The introduction of the new signaling system rests on achieving interoperability in radio‐communication.The study will focus on the GSM-R part of the ERTMS system and its interworking with ETCS.
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Wicaksono, Khalfan Nadhief Prayoga, i Catur Apriono. "Literature review: visible light communication system business model scheme for telecommunication business in Indonesia". MATRIX : Jurnal Manajemen Teknologi dan Informatika 13, nr 2 (29.07.2023): 80–93. http://dx.doi.org/10.31940/matrix.v13i2.80-93.

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The telecommunication sector mainly comprises operators, vendors, and regulators. In Indonesia, tele- communications operator companies tend to decrease profits from the first quarter of 2017 to the third quarter of 2018. This condition is due to the tight competition of telecommunication service providers, high operational costs, and digital transformation that does not provide substantial revenue for the company. Telecommunica- tions operators need other service options that can expand target market segmentation. It aims to open up a new blue ocean as a new source of income. The world is getting closer to massive communication technology, so high-speed communication is needed. Therefore, telecommunications operators can open new service options based on the visible light spectrum as their communication resources. This option can be integrated with ambient lighting, a wide spectrum ranging from radio waves, and greater bandwidth, making visible light suitable for IoT- 5G services. This research aims to design a wireless visible light communication business model. Several frame- works are used, such as the magic triangle of St. Gallen, Osterwalder Business Model Canvas, and PESTLE analysis. The business model design results in a business model with B2B market segmentation being the main focus and B2C market segmentation to acquire retail customers.
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VASYLKIVSKYI, MYKOLA, OKSANA HORODETSKA, OLEXANDER STALCHENKO i MYHAILO BUDASH. "INTEGRATED RADIO SCANNING AND COMMUNICATION SYSTEM". Herald of Khmelnytskyi National University. Technical sciences 319, nr 2 (27.04.2023): 56–63. http://dx.doi.org/10.31891/2307-5732-2023-319-1-56-63.

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The article discusses ways to optimize the performance of information communication systems, which includes increasing spectral efficiency and reliability while minimizing delay and energy consumption due to the full integration of communication and scanning services. The functioning algorithm of the integrated scanning and communication system and the organization scheme of the communication mode using the scanning process based on the proposed generalized model of the integrated scanning and data transmission system are considered. Ways to improve the efficiency of telecommunication systems due to the joint use of communication and scanning tools with the best compromise between scanning characteristics and the bandwidth of the transmission channel are considered. Peculiarities of improving wireless communication systems with regard to high data transfer rates, low latency and wide connection possibilities are studied. In particular, access to other system functions, such as scanning/visualization and localization, is justified. Due to the considered innovative applications, the possibility of increasing the performance of the integrated wireless scanning and communication system (ISAC) is determined. The researched positioning process in 5G is proposed to be expanded due to additional detection functions, in particular with the use of new metrics such as accuracy and resolution. New KPIs in 6G networks are considered, replacing the KPI of positioning accuracy in 5G. As a result, key performance indicators based on different application scenarios are proposed, the accuracy of which should be from 1 to 10 cm, and the resolution should be up to 1 mm. The potential of the new ISAC technology was investigated, in particular, the features of the coexistence of communication and scanning modules in an integrated solution at the system level and methods of increasing the efficiency of coexistence at the system level were considered; justification of a positive result from an integrated system solution for communication and scanning services; advantages and disadvantages of existing communication and scanning systems with implemented integration at the system level. The obtained results of research on the integration of communication and scanning means, in particular: the analysis of the performance of generalized ISAC networks and the conclusions about the fundamental limits of performance obtained for a simple structure made it possible to determine the best compromise between the characteristics of scanning and the bandwidth of the communication channel, provided an opportunity to create practical schemes, which approximate a compromise of waveforms, coding tables, structures and protocols.
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Borisov, E. G. "Determination of the location of air objects in polistatic radar system parasitising on radiation telecommunication systems". Civil Aviation High TECHNOLOGIES 21, nr 5 (28.10.2018): 105–16. http://dx.doi.org/10.26467/2079-0619-2018-21-5-105-116.

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Currently, in areas of large cities there is a steady trend towards an increase in the spatial density of telecommunications systems. Saturation of the radio spectrum with analogue and digital systems used to solve problems of radio communication and television allows on their basis improving the technologies for semi-active radar detecting and determining the coordinates of air objects. The introduction of radar surveillance using transmitters not intended for radar purpose is often called a semi-active radar using outside or “parasitic” emission sources. The advantages of the systems are the minimization of the deployment costs, low operational energy costs, a low probability of establishing distortions, stealth operation, environmental friendliness and lack of requirements for radio frequency resource allocation. The relatively large elevations of the antennas of communication and television transmitters with the existing emitted power create favorable conditions for the detection of low altitude air objects. The digital signals of modern telecommunications systems have a spectrum width that provides acceptable resolution and accuracy for measuring the full range and angular coordinates. In general, a system of this type is a poly-static (multi-static) system consisting of one or more radiation sources and one or more receiving positions scattered in space. The promising task such systems solve along with airspace control is air traffic control. The article considers options for determining the rectangular coordinates of air objects in a system of bistatic radar stations using radio emission from external sources for target detection. The variants of the location of air objects with different composition of primary measurements of coordinates and a number of transmitting positions are considered. Analytical expressions are given for calculating the projections of the target velocity vector on the axis of the Cartesian coordinate system. The accuracy of airborne positioning for multi-static radar systems of this type is estimated.
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She, Yuanjun, i Zhi Li. "Radio Resource Allocation Algorithm of the M2M Communication System in 5G Era". Wireless Communications and Mobile Computing 2022 (24.05.2022): 1–12. http://dx.doi.org/10.1155/2022/3665513.

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M2M is a concept and a general term for all technologies that enhance the communication and network capabilities of machines and equipment. It is a combination of different types of communication technologies. M2M enables all devices and users to share information, saving operation time and improving work efficiency. M2M is not a simple data transmission, but it is an intelligent and interactive communication between machines. Even if no real-time signal is sent, the machine will actively communicate according to the established program and select intelligently according to the obtained data. The communication system refers to the general term of the technology that completes the information transmission function. The modern communication system is mainly realized by the propagation of electromagnetic waves in free space or the transmission mechanism in the guiding medium. When the wavelength of the electromagnetic wave reaches the light wave range, such a telecommunication system is called an optical communication system, and the communication system in the other electromagnetic wave range is called an electromagnetic communication system, abbreviated as a telecommunication system. The purpose of this paper is to explore the study of wireless data sharing method for M2M mobile telecommunication systems in the 5G era. It is expected that the new algorithm will make the wireless resource allocation more reasonable and improve the resource utilization rate. The performance of the deterministic measurement matrix proposed in this paper is close to or even better than that of the random measurement matrix. The M-SP algorithm greatly improves the performance of the SP algorithm. The experimental results of this paper show that when the number of microbase stations is 10, the energy consumption of the direct algorithm is 175000 W, the energy consumption of the indirect algorithm is 350000 W, and the energy consumption of the direct algorithm is much smaller than that of the indirect algorithm.
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Bondarenko, Leonid, Mykola Masesov, Katerina Buzayeva, Iryna Hurzhii, Oksana Ilienko i Viktor Gnatyuk. "Method of Calculation the Accessibility of the Information and Telecommunication Networks of the Tactical Link of Management". International Journal of Computer Network and Information Security 13, nr 5 (8.10.2021): 68–78. http://dx.doi.org/10.5815/ijcnis.2021.05.06.

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The article reflects the views of the authors on the method for the operational calculation of the indicator of the functioning of special-purpose information and telecommunication networks of the tactical level of control according to the criterion of "network availability". Improvement of weapons and military equipment, forms and methods of combat, as well as a change in views on command and control, put forward ever more stringent requirements for the information and telecommunication system in general and for its elements in particular. The problems of development, planning of combat use and operation of information and telecommunication networks of the tactical control level are their heterogeneity, since they use heterogeneous transmission systems (radio and wire) together. The characteristic features of the planning, deployment and operation of information and telecommunication networks of the tactical control level are a high degree of uncertainty in the characteristics of their functioning and the lack of initial data in planning, which necessitates the improvement of the methodological basis for conducting operational calculations. Based on the analysis of ITU-T recommendations, scientific publications and the practice of combat use of the defense forces, it becomes clear that the operational calculation of individual criteria and indicators of the functioning of information and telecommunication systems of the tactical control level needs to be improved, since these systems have their own characteristic features. The material presented in the article makes it possible to develop new approaches to solving the problem of a reasonable calculation of the required bandwidth of the access node of the information and telecommunications network of the tactical control link. The significance and value of this study lies in the fact that in the conditions of continuous improvement of the forms and methods of warfare, high dynamism of changes in the states of information and telecommunication systems of the tactical control level, the correct choice of the apparatus for assessing the decisions made should play a decisive role in shortening the deployment planning cycle and sustainable functioning of the system management.
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Rozprawy doktorskie na temat "Radio (telecommunication system)"

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Sharkey, Jeffrey Allen. "Automated radio network design using ant colony optimization". Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/sharkey/SharkeyJ0508.pdf.

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Radio networks can provide reliable communication for rural intelligent transportation systems (ITS). Engineers manually design these radio networks by selecting tower locations and equipment while meeting a series of constraints such as coverage, bandwidth, maximum delay, and redundancy, all while minimizing network cost. As network size and constraints grow, the design process can quickly become overwhelming. In this thesis we model the network design problem (NDP) as a generalized Steiner tree-star (GSTS) problem. Any solution to the minimum Steiner tree (MST) problem on a constructed GSTS graph will directly identify the tower locations and equipment needed to build the network at an optimal cost. The direct MST solution can only satisfy coverage constraints. Because the MST problem is known to be NP-hard, our research applies ant colony optimization (ACO) to find near-optimal MST solutions. Using ACO also allows us to meet bandwidth, maximum delay, and redundancy constraints. We verify that our approach finds near-optimal designs by comparing it against a 2-approximation algorithm in several different scenarios.
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Kyösti, P. (Pekka). "Radio channel modelling for 5G telecommunication system evaluation and over the air testing". Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219035.

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Abstract This thesis discusses radio channel modelling for evolving radio access and of using the models in practice in a setup for radiated testing of radio devices. New telecommunication systems are constantly being developed to address continuously increasing wireless communication needs. The first pieces of intensively developed fifth generation (5G) networks and devices are planned to be available, in some form, approximately by 2020. An interesting feature of 5G concerning propagation and consequently channel modelling, is the expected utilization of frequencies clearly higher than the legacy cellular systems. This work aims to define a channel model for the simulated evaluation of the coming 5G systems. New requirements for the channel model are identified and addressed. Further, over the air (OTA) testing of 5G devices in fading conditions is examined and a new setup is proposed. The test environment aims to reconstruct a time variant electromagnetic (EM) field around a device under test (DUT) considering the spatial, polarimetric, Doppler, and delay dispersion characteristics specified by the target channel model. Components and key design parameters of the setup are designated. It was found that the proposed map-based channel model is capable of fulfilling the identified requirements. Furthermore, the simulations indicate that the state-of-the-art geometry-based stochastic channel model (GSCM) may give over-optimistic multi-user MIMO (MU-MIMO) performance in an urban micro-cellular environment. The sectored OTA concept was shown appropriate for device testing. Key parameters, such as the physical dimensions of the multi-probe anechoic chamber (MPAC) OTA configuration and the number of active probes, were determined by simulations. The 3GPP is the main forum working towards 5G standards. A channel model for 5G evaluations has recently (2016) been specified. The base-line model is a GSCM inherited from the 4G models. However, the author expects that the proposed map-based models will gain popularity in the future, despite the current widespread use of GSCMs. In the 3GPP working group RAN4 (Radio performance and protocol aspects) the test methods for 5G user equipment (UE) are currently (2017) under investigation. The proposed sectored MPAC method has been contributed to and is under consideration in 3GPP. Even if it is not approved for UE testing, the author expects it to be useful for performance testing of base stations (BSs)
Tiivistelmä Tämän väitöskirjan sisältönä on radiokanavamallinnus langattomia tiedonsiirtojärjestelmiä varten ja lisäksi mallien käyttöönottoa tulevien radiolaitteiden säteilevässä testauksessa. Uusia tietoliikennejärjestelmiä kehitetään jatkuvasti, yhtä lailla jatkuvasti kasvavien tiedonsiirtotarpeiden tyydyttämiseksi. Ensimmäisten verkkojen ja päätelaitteiden pitäisi olla saatavilla tulevaan viidennen sukupolven (5G) järjestelmään vuoden 2020 tietämillä. Työn tarkoituksena on määritellä kanavamalli 5G-järjestelmän simulointeja varten ja sitä edeltäen tunnistaa kanavamallin vaatimukset. Lisäksi tutkimuksen aiheena on 5G-laitteiden säteilevä (OTA) testaus häipyvässä radiokanavassa ja uuden testijärjestelmän määrittely tätä tarkoitusta varten. Ehdotetun testijärjestelmän keskeisenä toimintona on halutun sähkömagneettisen (EM) kentän tuottaminen testattavan laitteen ympärille. EM-kentän pitää olla kanavamallin mukainen ja toteuttaa sen häipymä-, tila-, polarisaatio-, doppler- ja viiveominaisuudet. Testijärjestelmän komponentit ja tärkeimmän suunnitteluparametrit pyritään selvittämään tässä työssä. Tutkimuksessa havaittiin, että ehdotettu karttapohjainen kanavamalli toteuttaa 5G-mallille asetetut vaatimukset. Simuloinnit osoittavat myös, että tyypillisessä kaupunkiympäristössä suosittu GSCM-malli yliarvioi kanavan kapasiteetin monen käyttäjän MIMO-tekniikka käytettäessä. Lisäksi osoitettiin sektoroidun OTA-järjestelmän, jossa hyödynnetään useita antenneja, radiokanavaemulaattoria sekä radiokaiutonta huonetta (MPAC), käyttökelpoisuus 5G-laitteiden testaukseen. Kyseisen testausjärjestelmän parametrit määriteltiin. 3GPP on tärkein foorumi, jolla 5G-standardeja luodaan. Siellä on hiljattain (2016) sovittu 5G-simulointeja varten kanavamalli, joka ei ole tässä työssä ehdotetun kaltainen. Standardoitu malli on tyypiltään GSCM ja se on johdettu suoraan edellisen sukupolven (4G) kanavamallista. Kirjoittaja olettaa tästä GSCM:n nykyisestä vahvasta asemasta huolimatta, että ehdotettu karttapohjainen kanavamalli lisää suosiotaan tulevaisuudessa. Parhaillaan (2017) on 3GPP:n RAN4-työryhmässä käynnissä 5G-päätelaitteiden (UE) testimenetelmien määrittelyvaihe. Väitöskirjassa tutkittua sektoroitua MPAC-menetelmää on ehdotettu työryhmälle standardoitavaksi. Vaikka mainittua menetelmää ei siellä standardoitaisikaan UE-testaukseen, niin voidaan olettaa menetelmän olevan hyödyllinen erityisesti tukiasemien säteilevään testaukseen
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Smuts, Matthys. "Software modem for a software defined radio system". Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1985.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2007.
The use of older and slower protocols has become increasingly difficult to justify due to the rapid pace at which telecommunications are advancing. To keep up to date with the latest technologies, the communications system must be designed to accommodate the transparent insertion of new communications standards in all the stages of a system. The system should, however, also remain compatible with the older standards so as not to demand an upgrade of the older systems. The concept of a software defined radio was introduced to overcome these problems. In a software defined radio system, the functionality of the communications system is defined in software, which removes the the need for alterations to the hardware during technology upgrade. To maintain interoperatibilty, the system must be based on a standardised architecture. This would further allow for enhanced scalability and provide a plug-andplay feature for the components of the system. In this thesis, generic signal processing software components are developed to illustrate the creation of a basic software modem that can be parameterised to comply fully, or partially, to various standards.
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Larsson, Joachim. "CPU Load Control of LTE Radio Base Station". Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-123499.

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A radio base station (RBS) may become overloaded if too many mobile devices communicate with it at the same time. This could happen at for instance sport events or in the case of accidents. To prevent CPU overload, the RBS is provided with a controller that adjusts the acceptance rate, the maximum number of connection requests that can be accepted per time interval. The current controller is tuned in real radio base stations and the procedure is both time consuming and expensive. This, combined with the fact that the mobile data usage is predicted to increase puts more pressure on today's system. Thus, there is a need to be able to simulate the system in order to suggest an alternative controller. In this thesis, an implementation of the system is developed in Matlab in order to simulate the RBS system load control behaviour. A CPU load model is estimated using system identification. The current version of the CPU load controller and an alternative PI CPU load controller are implemented. Both are evaluated on different test cases and this shows that it is possible to increase the performance of the system with the alternative CPU load controller, both in terms of lower amount of rejected connection requests and decreased CPU load overshoot.
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Labuschagne, Adriaan S. "The design of a telemetry system for Grumeti Reserves /". Thesis, Link to the online version, 2006. http://hdl.handle.net/10019.1/2542.

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Aburawi, Abdulrahman, i Sarija Salic. "Emergency Communication". Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20568.

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Even in the 21st century, modern communication technology is still affected by natural disasters and political turmoil which threaten people’s lives and make the internet or mobile phone networks unavailable for use. This work uses systems theory which resulted in a proof of concept system that uses shortwave radio technology to provide a one-way communication system. A message a user writes on their smartphone, which is connected to a small pre-set transmitter, is sent out to a receiver in another part of the world where the message can then be posted on the internet. This system is a cheaper alternative to other shortwave radio transmitters, and has potential for improvement.
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Senol, Gokberk. "Performance Analysis Of A Digital Communication System On Sea Platforms". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615134/index.pdf.

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The transmission rate and reliability are the most crucial elements of a communication system on sea platforms. In this thesis, the performance of a high speed and reliable communication system that can be used on ship to ship sea platforms will be evaluated. The two ray channel model is used in order to characterize the channel considering the refraction and reflection. Using the channel model, the path loss and the Shannon channel capacities are obtained for different systems. In order to increase the system performance, frequency diversity technique is used and a detailed comparison of diversity combining techniques is provided. As an alternative to Shannon channel capacity, cut off rate analysis is considered to get more realistic results about the rate of the communication system in that it takes modulation into account and the results are compared with the channel capacity. Block fading model and jamming effects on the achievable rate of the system is considered for different linear modulation techniques. Finally, an OFDM system design is given as an example using the tools obtained in this work.
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Tanyer, Fatma Muge. "Design Of Log-periodic Dipole Array Feed And Wide Band Reflector Antenna System". Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605948/index.pdf.

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The introduction of broadband systems to communication and radar technologies has demanded the design of broadband antennas. In this thesis, broadband log-periodic dipole antennas and reflector antennas are investigated. A dual polarized log-periodic dipole antenna and a reflector antenna are designed and analyzed within the frequency band of 0.4-18 GHz. Basic theory and calculations about mutual coupling between the linear antenna elements are given. The currents at the bases of dipoles of the log-periodic antenna are found and these currents are used as inputs for the design of the reflector antenna. After the simulations made with MATLABÒ
and FORTRAN, a prototype single polarized log-periodic antenna is produced. Developments on the prototype antenna are performed, both to improve the electrical characteristics of the antenna and to make the final design realizable. After the performance of the single polarized log-periodic antenna is found satisfactory, dual polarized antenna is produced. Performances of both single and dual polarized log-periodic antennas are measured in the anechoic chamber at ASELSAN®
Inc. After the measurements of the antenna, using the currents at the bases of the dipoles, a reflector antenna is designed using &ldquo
MIR&rdquo
program written in FORTRAN, which is based on physical optics method. A method to calculate the aperture blockage of the reflector is developed. Simulation results of reflector antenna are given.
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Kilicoglu, Nezaket. "Construction Of An Experimental Radar System". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612760/index.pdf.

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In this thesis, an Experimental Radar System is designed and constructed for use in experimental radar studies such as clutter measurement and target detection, both in the laboratory and outdoor. COTS laboratory equipments are utilized as hardware elements of the radar and MATLAB is used as signal processing and user interface software tool. Vector signal generator (as transmitter), spectrum analyzer with vector signal analysis (as receiver), a high power amplifier, a low noise amplifier, horn antennas and a computer are the hardware units of the system. Various transmit signals are generated and pulse Doppler processing is performed at the receiver side. The system is controlled through the user interface which runs on a PC.
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Kurekli, Kenan. "System Parameter Adaptation Based On Image Metrics For Automatic Target Detection". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604966/index.pdf.

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Automatic object detection is a challenging field which has been evolving over decades. The application areas span many domains such as robotics inspection, medical imaging, military targeting, and reconnaissance. Some of the most concentrated efforts in automatic object detection have been in the military domain, where most of the problems deal with automatic target detection and scene analysis in the outdoors using a variety of sensors. One of the critical problems in Automatic Target Detection (ATD) systems is multiscenario adaptation. Most of the ATD systems developed until today perform unpredictably i.e. perform well in certain scenarios, and poorly in others. Unless ATD systems can be made adaptable, their utility in battlefield missions remains questionable. This thesis describes a methodology that adapts parameterized ATD systems with image metrics as the scenario changes so that ATD system can maintain better performance. The methodology uses experimentally obtained performance models, which are functions of image metrics and system parameters, to optimize performance measures of the ATD system. Optimization is achieved by adapting system parameters with incoming image metrics based on performance models as the system works in field. A simple ATD system is also proposed in this work to describe and test the methodology.
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Książki na temat "Radio (telecommunication system)"

1

Horzepa, Stan. APRS: Tracks, maps, and mobiles : a guide to the Automatic Position Reporting System. Newington, CT: AARL, 1999.

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Simon, Stan. The global positioning system: Markets and applications. Burlington, Mass: Decision Resources, 1991.

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1970-, Holma Harri, i Toskala Antti, red. WCDMA for UMTS: Radio access for third generation mobile communications. Chichester, Eng: J. Wiley, 2001.

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Ippolito, Louis J. Propagation effects handbook for satellite systems design: A summary of propagation impairments on 10 to 100 GHz satellite links with techniques for system design. Wyd. 4. Washington, D.C: National Aeronautics and Space Administration, Scientific and Technical Information Division, 1989.

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Office, General Accounting. Radio frequencies: Earlier coordination could improve system use and save costs : report to the Secretary of Defense. Washington, D.C: The Office, 1987.

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Office, General Accounting. Radio frequencies: Earlier coordination could improve system use and save costs : report to the Secretary of Defense. Washington, D.C: The Office, 1987.

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Office, General Accounting. Radio frequencies: Earlier coordination could improve system use and save costs : report to the Secretary of Defense. Washington, D.C: The Office, 1987.

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Hong, Peter Y. W. Cooperative Communications and Networking: Technologies and System Design. Boston, MA: Springer Science+Business Media, LLC, 2010.

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Horzepa, Stan. Getting on track with APRS: A hands-on guide to the automatic packet reporting system. Newington, CT: American Radio Relay League, 1996.

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Sweeney, Anita. Development of telecommunication infrastructure and its implications for the land use planning system in Ireland: Acase study of cellular mobile antennae. Dublin: University College Dublin, 1996.

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Części książek na temat "Radio (telecommunication system)"

1

Louvros, Spiros, Vassilios Triantafyllou i George Asimakopoulos. "Indoor Radio Design: LTE Perspective". W System-Level Design Methodologies for Telecommunication, 1–20. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00663-5_1.

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Aminev, Dmitry, Alexander Zhurkov, Sergey Polesskiy, Vladimir Kulygin i Dmitry Kozyrev. "Comparative Analysis of Reliability Prediction Models for a Distributed Radio Direction Finding Telecommunication System". W Communications in Computer and Information Science, 194–209. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-51917-3_18.

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Wierzbicki, Andrzej Piotr. "Telecommunication, Radio Broadcasting, Television". W Intelligent Systems Reference Library, 119–35. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09033-7_7.

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Terré, Michel, Mylène Pischella i Emmanuelle Vivier. "Radio Propagation". W Wireless Telecommunication Systems, 1–22. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118625422.ch1.

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Bonneville, Hervé, Loïc Brunel i David Mottier. "Standardisation Roadmap for Next Train Radio Telecommunication Systems". W Lecture Notes in Computer Science, 51–61. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38921-9_6.

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Connell, Asuncion. "Private Land Mobile Radio Services In-building System Design Considerations". W Women in Telecommunications, 335–56. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-21975-7_12.

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Ludwig, Reiner, Norbert Niebert i Raphaël Quinet. "Radio webs — Support architecture for mobile web access". W Interactive Distributed Multimedia Systems and Telecommunication Services, 261–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/bfb0000358.

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Islamov, Islam. "Modeling of Microwave Waveguide Systems of Complex Structure in Nonlinear Media in a Mobile Computer System". W Radio Engineering and Telecommunications Waveguide Systems in the Microwave Range, 99–140. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-37916-1_3.

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Neto, Carlos Lorena, Edson José Bonon i Fabrício Lira Figueiredo. "Brazilian Telecommunications Regulatory Framework and the Impacts on the Development of Broadband Radio Access Systems". W Telecommunications and Information Technology, 27–44. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23823-4_2.

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Robson, S. R., i M. C. Sinclair. "Reduction of Channel Idle Time in a Trunked Mobile Radio Network". W Performance Engineering of Computer and Telecommunications Systems, 355–69. London: Springer London, 1996. http://dx.doi.org/10.1007/978-1-4471-1007-1_24.

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Streszczenia konferencji na temat "Radio (telecommunication system)"

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Marigodov, V. K. "Space-time radio reception as the system of mass service". W Telecommunication Technology" (CriMiCo 2008). IEEE, 2008. http://dx.doi.org/10.1109/crmico.2008.4676371.

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Barkalov, Aleksander, Marek Wegrzyn i Arkadiusz Bukowiec. "Synthesis Of Fast Control Units For Telecommunication System". W 2006 International Conference - Modern Problems of Radio Engineering, Telecommunications, and Computer Science. IEEE, 2006. http://dx.doi.org/10.1109/tcset.2006.4404617.

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Semenko, A., Y. Shestopal, S. Kriviy i N. Bokla. "Mathematical Model Of Telecommunication System With MIMO 3x3". W 2019 International Conference on Information and Telecommunication Technologies and Radio Electronics (UkrMiCo). IEEE, 2019. http://dx.doi.org/10.1109/ukrmico47782.2019.9165373.

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Xiong, Wenhao, Xin Tian, Genshe Chen, Khanh Pham i Erik Blasch. "An adaptive software defined radio design based on a standard space telecommunication radio system API". W SPIE Defense + Security, redaktorzy Khanh D. Pham i Genshe Chen. SPIE, 2017. http://dx.doi.org/10.1117/12.2266543.

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Gladkov, M. N., i G. S. Rudanov. "“Programmable radio” platform on the basis of national instruments PXI-system". W Telecommunication Technology" (CriMiCo 2008). IEEE, 2008. http://dx.doi.org/10.1109/crmico.2008.4676677.

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Moshynska, Alina. "Shaping the telecommunication strategies for multiservice system based on information society scenarios". W 2016 International Conference "Radio Electronics & Info Communications" (UkrMiCo). IEEE, 2016. http://dx.doi.org/10.1109/ukrmico.2016.7739633.

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Xue, Minglong, Haifeng Wu i Yu Zeng. "Multilayer perceptron for modulation recognition cognitive radio system". W 2016 International Conference on Computer, Information and Telecommunication Systems (CITS). IEEE, 2016. http://dx.doi.org/10.1109/cits.2016.7546434.

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Vladimir, Ballar, i Olena Mazurkiewicz. "Joint quality monitoring system for radio systems with MPEG based compression". W 2017 International Conference on Information and Telecommunication Technologies and Radio Electronics (UkrMiCo). IEEE, 2017. http://dx.doi.org/10.1109/ukrmico.2017.8095377.

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Gudymenko, I. A., i S. A. Kravchuk. "Cooperative multi-user MIMO broadband radio access system deployment". W 2010 20th International Crimean Conference "Microwave & Telecommunication Technology" (CriMiCo 2010). IEEE, 2010. http://dx.doi.org/10.1109/crmico.2010.5632482.

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Dhulipalla, Pravallika, Minju Kang, Taejin Kim, Nathaniel Tan, Siddhartan Govindasamy i Michael B. Rahaim. "An Integrated Visible-Light and Radio Frequency Communications System". W 2019 International Conference on Computer, Information and Telecommunication Systems (CITS). IEEE, 2019. http://dx.doi.org/10.1109/cits.2019.8862074.

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