Temat: cellular radio - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Evaluation of the Impact of Transient Disturbances on Railway Signaling Systems Using an Adapted Time-Frequency Analysis Method
Autorzy:: Kousri, M. R.
Deniau, V.
Heddebaut, M.
Baranowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/226198.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: EMC
railways
signaling
transient disturbances
transient detection
cellular radio
bit error rate
Opis:: As many other industrial environments, the railway electromagnetic environment is characterized by a large number of electromagnetic signals and disturbances. Among these, transient signals, with high energy level and wide frequency spectrum, represent an important threat to different signaling subsystems. In this paper, a new methodology dedicated to the detection and the characterization of the transient disturbances is presented. Based on a flexible and adjustable time-frequency analysis, this methodology is used to evaluate the impact of transient disturbances on a ground-to-train radio communication. A test bench was developed in order to validate the results of this evaluation.
Źródło:: International Journal of Electronics and Telecommunications; 2017, 63, 4; 347-354
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evolutionary paths in wireless communication systems
Autorzy:: Michalski, W.
Powiązania:: https://bibliotekanauki.pl/articles/309042.pdf
Data publikacji:: 2005
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cellular mobile radio systems
wireless local area networks
wireless personal networks
wide area wireless packet data systems
satellite-based mobile systems
paging/messaging systems
cordless telephones
access points
switches
GPRS
Mobile IP
WLAN cellular integration
Opis:: The paper contains a review and analysis of evolutionary paths of seven most important, from network development strategy point of view, wireless communication systems, especially the WLAN operating according to the IEEE 802.11 standard. With respect to WLAN, trends related to evolution toward mobile network and self organizing network as well as toward integration of WLAN and GSM using GPRS are presented. Concerning WLAN architecture development, evolution paths toward distributed controlled network as well as centrally coordinated and controlled network are described. Moreover, analysis includes cellular mobile radio systems, wireless personal networks, wide area wireless packet data systems, satellite-based mobile systems, paging/messaging systems and cordless telephones. With respect to these systems, general evolution process and trends associated with this process are described.
Źródło:: Journal of Telecommunications and Information Technology; 2005, 3; 105-111
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Radio Channels Modeling for Adaptive Antennas Applications – Analysis of Elevation, Azimuth and Delay Spread
Autorzy:: Łapszow, R.
Modelski, J.
Powiązania:: https://bibliotekanauki.pl/articles/307848.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: adaptive antenna
cellular systems
radio channel modeling
Opis:: Research of modeling urban environment channel has been presented in this paper. Measurements were performed for 2.2 GHz band. Test environment was based on existing 3G sites. Elevation, delay and azimuth spreads were analyzed. Both theoretical channel modeling and similar tests campaign were subject for analysis in this paper. Based on radio channel modeling further investigations are presented and the adaptive antenna implementation was proposed.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 2; 35-41
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Performance Analysis of Empirical Radio Propagation Models in Wireless Cellular Networks
Autorzy:: Rahul, Rahul
Bansal, Bajrang
Kapoor, Rajiv
Powiązania:: https://bibliotekanauki.pl/articles/1075552.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: 2G
3G
4G
5G Cellular Networks
Cell Coverage
Path Loss
Radio Propagation Models
Opis:: This paper presents the performance analysis of different empirical radio propagation models used in wireless cellular networks. It particular, the parameters such as path loss and cell coverage area are studied for different cellular networks from second generation (2G) to fifth generation (5G). Accurate prediction of path loss and coverage area is highly desirable for planning of any wireless communication systems. Considering the urban terrain, the comparison is made between Hata model, Stanford University Interim (SUI) model, and modified SUI models. As a motivation for new millimeter wave (mm-wave) cellular systems, i.e., for 5G communication, the analysis is performed at 28 GHz. Considering -75 dBm as the desired minimum received power, it is observed that 2G communication (at 900 MHz using Hata model) experiences the lowest path loss and thus results into largest coverage area. The path loss is observed to be maximum for the future mm-wave systems (at 28 GHz using modified SUI model) that directly imply the smallest coverage area.
Źródło:: World Scientific News; 2019, 121; 35-41
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Driver Workload Response to In-Vehicle Device Operations
Autorzy:: Jerome, C. J.
Ganey, H. C. N.
Mouloua, M.
Hancock, P. A.
Powiązania:: https://bibliotekanauki.pl/articles/91075.pdf
Data publikacji:: 2002
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: driver distraction
telematics
workload
cellular phones
obciążenie fizyczne
telefonia komórkowa
fizjologia pracy
kierowcy i maszyniści
psychologia pracy
radio
systemy nawigacji
Opis:: A central concern of Intelligent Transportation Systems (ITS) is the effect of in-vehicle devices (e.g., cell phones, navigation systems, radios, etc.) on driver performance and safety. As diverse and innovative technologies are designed and implemented for in-vehicle use, questions regarding the presence and use of these devices assume progressively greater importance. Further concerns for advanced driver training require us to develop and validate reliable and effective procedures for assessing such effects. This work examines a number of candidate procedures, in particular the evaluation of change in cognitive workload as a strategy by which such goals might be achieved.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2002, 8, 4; 539-546
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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