Search results for: radio

• Radio Physics and Radio Astronomy

  Journals

  ISSN: 1027-9636 , eISSN: 2415-7007

• Radio programowalne - przyszły standard inteligentnego systemu radiokomunikacyjnego

  Publication

  • R. Katulski
  • J. Stefański

  - Year 2007

  W pracy przedstawiono całkowicie nowatorską koncepcję programowalnego systemu radiokomunikacyjnego zwłaszcza w odniesieniu do inteligentnego terminala użytkownika w tym systemie. Na wstępie omówiono platformę sprzętową takiego rozwiązania. Następnie przedstawiono rozwiązanie systemowe platformy informatycznej, poczynając od jej charakterystyki funkcjonalnej, poprzez opis środowiska programowego koniecznego do realizacji niezbędnych...

• Radio Journal

  Journals

  ISSN: 1476-4504

• RADIO SCIENCE

  Journals

  ISSN: 0048-6604 , eISSN: 1944-799X

• Radio wave propagation conditions for terrestrial radiocommunications in the EHF band

  Publication

  • K. Bronk
  • R. Katulski
  • A. Lipka

  - International Journal of Electronics and Telecommunications - Year 2008

  Full text available to download

• Wideband Radio Direction Finder Implemented in Software Defined Radio Technology

  Publication

  • K. Cwalina
  • P. Rajchowski
  • J. Sadowski

  - Applied Mechanics and Materials - Year 2015

  In the paper a wideband radio direction finder (RDF) implemented in software defined radio (SDR) technology and the results of hardware layer research, including developed antenna switching unit (ASU), are presented. The results of tests of the devices, which are the part of the software defined radio platform (SDRP), and antenna switching unit, confirmed the possibility of using selected components in the final solution.

• Advances in Radio Science

  Journals

  ISSN: 1684-9965 , eISSN: 1684-9973

• Survey of Radio Navigation Systems

  Publication

  • P. Falkowski-Gilski
  • J. Stefański

  - International Journal of Electronics and Telecommunications - Year 2015

  At present, there is a growing demand for radio navigation systems, ranging from pedestrian navigation to consumer behavior analysis. These systems have been successfully used in many applications and have become very popular in recent years. In this paper we present a review of selected wireless positioning solutions operating in both indoor and outdoor environments. We describe different positioning techniques, methods, systems,...

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• Ultraszerokopasmowe (UWB) radio impulsowe

  Publication

  • R. Katulski
  • J. Sadowski

  - Year 2005

  Opisano podstawy budowy i działania impulsowego systemu UWB. Poruszono problem widma sygnału radiowego w tym systemie.

• The Influence of the Radio Channel on Precision of Position Estimation of the User Terminal Using the NB-IoT Radio Interface

  Publication

  • P. Rajchowski
  • K. Cwalina
  • J. Sadowski

  - Year 2023

  In the article the method of user terminal position estimation using the broadcast signals transmitted in the downlink of the NB-IoT interface was presented, including the analysis of the radio channel influence on precision of position estimation as well as the eNodeB (Evolved Node B) synchronization. The practical ability to estimate the position in the test area has been verified in the laboratory conditions, using the reference...

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• Measuring research on radio wave propagation

  Publication

  • S. J. Ambroziak

  - Year 2010

  Telecommunication connections are increasingly based on the wireless links, both fixed and mobile, carried out under different radio systems. This kind of solution has many advantages. However, the propagation medium is a factor that causes many difficulties in designing wireless networks, because of large diversity of propagation environments. Transmission loss in each environment is determined by many variables phenomena and...

• Trunked Radio Solutions for Special Application

  Publication

  • S. Gajewski
  • M. Gajewska
  • R. Katulski

  - International Journal of Electronics and Telecommunications - Year 2014

  In the paper modern concepts of radio communication trunking-dispatch systems for special applications are presented. Basic standards of TETRA, DMR, and cdma2000 are mentioned. The aim of the paper is to present innovative trunking solutions based on the LTE system working both in FDD and TDD mode. The architecture of LTE trunked radio is shown as well as new services possible to implementation are described. The way of TETRA and...

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• Radio programowalne - nowoczesna platforma dydaktyczna

  Publication

  • P. Falkowski-Gilski
  • J. Stefański

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Year 2014

  Przedstawiono technologię radia programowalnego jako nowoczesną platformę dydaktyczną. Zaproponowane podejście pozwala na efektywniejsze planowanie stanowisk laboratoryjnych. Umożliwia skrócenie czasu realizacji etapów związanych z projektowaniem, symulacją i testowaniem działania łącza radiowego. Pozwala również na elastyczną zmianę stanowisk laboratoryjnych zgodnie z dynamicznym rozwojem współczesnych systemów radiokomunikacyjnych.

• Improvement of impulse radio electromagnetic compatibility

  Publication

  • J. Sadowski
  • R. Katulski

  - Year 2008

  Publikacja zawiera opis jednej z możliwych technik modyfikacji widma sygnału ultraszerokopasmowego radia impulsowego na przykładzie standardu IEEE 802.15.4a, opartą o zmianę struktury sekwencji generowanych impulsów o bardzo krótkim czasie trwania. Technika ta może zmniejszyć ryzyko wzajemnych zakłóceń pomiędzy nowymi urządzeniami ultraszerkopasmowymi a istniejącymi urządzeniami radiokomunikacji wąskopasmowej

• Hyperbolic Asynchronous Method of a Radio Navigation Technique

  Publication

  • R. Katulski
  • J. Sadowski
  • J. Stefański
  • W. Siwicki

  - Applied Sciences-Basel - Year 2020

  Humans have always wanted to determine position in an unknown environment. At the beginning methods were simple. They were based on the observation of characteristic points, in the case of shipping additional observations of the coastline. Then came navigation based on astronomical methods (astronavigation). At the beginning of the XX-century a new way of determining the current location was developed. It has used radiowave signals....

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• Application of the GNU Radio platform in the multistatic radar

  Publication

  • B. Szlachetko
  • A. Lewandowski

  - Year 2009

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• Localization of Mobile Robot Using Radio Waves

  Publication

  • J. Nowacki
  • M. A. Dąbkowski
  • P. Niklas
  • G. Redlarski

  - Solid State Phenomena - Year 2009

  Opisano systemy lokalizacji robotów mobilnych wykorzystujące metody triangulacji i trilateracji, w przestrzeniach dwuwymiarowych. Zaproponowano metodę pomiaru odległości drogą radiową oraz przedstawiono uzyskane wyniki badań.

• Relativistic runaway breakdown in low-frequency radio

  Publication

  • M. Füllekrug
  • R. Roussel-Dupré
  • E. Symbalisty
  • O. Chanrion
  • A. Odzimek
  • O. van
  • T. Neubert

  - JOURNAL OF GEOPHYSICAL RESEARCH - Year 2010

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• Journal of Radio & Audio Media

  Journals

  ISSN: 1937-6529 , eISSN: 1937-6537

• Design of radio communication systems for unmanned transport applications

  Publication

  • S. Gajewski

  - Archives of Transport System Telematics - Year 2016

  In the paper the principle of OFDMA-based radio communication systems design for unmanned transport applications is presented. The concept of system radio interface is analysed and its basic parameters proposal are considered. In the last part of the paper some air interface characteristics useful for optimization of throughput and system capacity are considered.

• Radio Link Measurement Methodology for Location Service Applications

  Publication

  • J. Stefański

  - Metrology and Measurement Systems - Year 2012

  The aim of this paper is the methodology of measurements executed in a radio link for the realization of radiolocation services in radiocommunication networks, particularly in cellular networks. The main results of the measurements obtained in the physical layer of the universal mobile telecommunications system (UMTS) are introduced. A new method for the utilization of the multipath propagation phenomenon to improve the estimation...

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• Towards 5G — Cloud-based Radio Access Networks

  Publication

  • S. Gajewski

  - Zeszyty Naukowe Akademii Marynarki Wojennej - Year 2017

  In the paper a general concept of the 5G network architecture is presented as well as system requirements having impact on innovative solutions in the 5G network are highlighted. A major part of the paper is both presentation and discussion of the problem of Cloud Radio Access Network introduction for public networks in which the cell and resource virtualisation will be implemented. On the other hand, the problem of resource virtualization...

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• Modernization of large music studio at Polish Radio Szczecin

  Publication

  • A. Kulowski

  - Year 2011

  Studio Muzyczne S-1 w Polskim Radiu Szczecin należy do największych studiów nagrań w Polsce. Wymiary studia wynoszą 15.3 x 17 x 8.6 m, powierzchnia 261 m2, kubatura 2244 m3. W wyniku licznych korekt akustycznych dokonanych w ciągu ostatnich lat, warunki akustyczne studia są akceptowane przez szeroki krąg realizatorów i wykonawców, co uznano to za cenny i trudno odtwarzalny walor techniczny. W związku z tym, modernizację Studia...

• Accuracy analysis of the radio location service in the sea environment

  Publication

  • R. Katulski
  • J. Stefański
  • R. Niski
  • J. Żurek

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Year 2007

  W artykule przedstawiono koncepcję systemu bezpieczeństwa na morzu w oparciu o istniejące systemy komórkowe. Scharakteryzowano problem lokalizowania terminala ruchomego przez sieć w warunkach morskich. Przedstawiono wyniki badań przeprowadzonych w warunkach rzeczywistych w odniesieniu do efektywności lokalizowania terminala na morzu. Przedstawiono wnioski, wypływające z przeprowadzonych analiz.

• Calculation of the propagation loss in urban radio-access systems

  Publication

  • R. Katulski
  • A. Kiedrowski

  - IEEE ANTENNAS AND PROPAGATION MAGAZINE - Year 2008

  Zweryfikowano eksperymentalnie modele propagacyjne opracowane dla telefonii komórkowej w mieście, stosowane przy analizach projektowych systemów dostępowych. Przeprowadzono obszerne badania pomiarowe i zebrano prawie 19 tys. pomiarów. Na tej podstawie, stosując wielowymiarową analize regresji oraz zaproponowaną charakterystykę propagacyjną radiowych łączy dostępowych, opracowano nowy wielowariantowy model propagacyjny przeznaczony...

• Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika)

  Journals

  ISSN: 0040-2508

• On efficiency of layer 2 of the radio interface protocol stack in UMTS

  Publication

  • P. Matusz

  - Year 2006

  Celem pracy jest szczegółowa analiza funkcjonowania warstwy łącza danych w podsystemie dostępu radiowego UTRAN systemu UMTS i na tej podstawie przedstawienie szeregu zmian i usprawnień oraz wskazówek odnośnie konfiguracji protokołów, jakie należy w tej warstwie zastosować aby zmaksymalizować jej wydajność głównie pod kątem oferowanej przepływności, wprowadzanych opóźnień oraz wsparcia priorytetów przesyłanego ruchu. Teza pracy...

• Signals of the 5G Standalone Radio Interface

  Open Research Data

  open access

  • P. Rajchowski
  • J. Magiera
  • A. Czapiewska
  • S. Ambroziak
  • K. Cwalina
  • P. Skokowski
  • J. Kelner
  • K. Malon
  • K. Maślanka
  • M. Kryk

  - series: 1.0

  The research work conducted within the scope of NATO-STO (North Atlantic Treaty Organization – Science and Technology Organization) IST-187 group assumed investigation of the 5G gNodeB performance. The downlink (DL) signals of the FDD (Frequency Division Duplex) 5G-Standalone station were registered in isolated and controlled laboratory conditions....

• Radio Simulcasting at a Glance: a New Look at Broadcasting and Streaming Services

  Publication

  • P. Falkowski-Gilski

  - Year 2018

  Radio is by far one of the most popular and accessible medium. With its availability it attracts listeners all around the world. There are numerous ways of delivering content to consumers. The present situation is characterized by the convergence of acoustics, computer science and telecommunications. This paper reviews the current status of radio broadcasting and streaming services. It describes a subjective study concerning different...

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• Transmission Quality in MC-CDMA Radio Interface with Turbo Codes

  Publication

  • A. Marczak

  - Year 2012

  Multi-Carrier Code Division Multiple Access techiques is a combination of two radio access techniques: Code Division Multiple Access (CDMA) and Orthogonal Frequency-called Division Multiplexing (OFDM) and has the advantages of both techniques. The paper presents the design of transmitter and receiver for MC-CDMA radio interface and the simulation results of the transmission quality in AWGN channel.

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• Measurement of Coherence Bandwidth in UHF Radio Channels for Narrowband Networks

  Publication

  • J. Sadowski

  - International Journal of Antennas and Propagation - Year 2015

  This paper presents results of investigation on the coherence bandwidth of narrowband radio channels in 430MHz band. The coherence bandwidth values were estimated froma power delay profile obtained by recording CDMA2000 forward channel signals during real-fieldmeasurements in various environments:mediumcity, flat terrain, and hilly terrain in northern Poland.The results of measurements are compared with characteristic parameters...

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• Efficiency of IEEE 802.15.4a UWB Impulse Radio Spectrum Shaping

  Publication

  • J. Sadowski
  • R. Katulski

  - Year 2010

  This paper presents results of impulse radio signal spectrum shaping efficiency investigations. Basic parameters of IEEE 802.15.4a UWB signal and outline of proposed spectrum shaping methods are briefly described. The main part of the paper presents influence of signal and algorithms parameters on the results of spectrum shaping.

• DAB vs DAB+ Radio Broadcasting: a Subjective Comparative Study

  Publication

  • P. Falkowski-Gilski

  - Archives of Acoustics - Year 2017

  In the age of digital media, delivering high quality content to consumers is one of the most demanding tasks. There exist numerous broadcasting standards, with different pros and cons, and the DAB/DAB (Digital Audio Broadcasting) system is one of the most popular among them. From an engineer’s perspective, efficient resource management under limited bandwidth conditions has always been a challenge. In this paper a subjective quality...

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• Performance analysis and optimization of the Radio Link Control layer in UMTS.

  Publication

  • P. Matusz
  • J. Woźniak

  - Year 2004

  RLC (Radio Link Control) jest jedną z podwarstw warstwy 2 stosu radiowego systemu UMTS. RLC wspiera trzy podstawowe tryby działania: przezroczysty (Transparent Mode, TM), bezpotwierdzeniowy (Unacknowledged Mode, UM) oraz potwierdzeniowy (Acknowledged Mode, AM). Wydajność RLC AM jest mocno uzależniona od konfiguracji RLC oraz jej zdolności do dynamicznej rekonfiguracji, odzwierciedlającej zmiany w przesyłanym ruchu oraz w jakości...

• Radio Channel Measurements in Body-to-Body Communications in Different Scenarios

  Publication

  • S. J. Ambroziak
  • L. M. Correia
  • K. Turbić

  - Year 2016

  This paper presents body-to-body radio channel measurements at the 2.45 GHz band, for different body motion scenarios and on-body antenna placements, and both indoor and outdoor environments. Measurement equipment, investigated scenarios and considered environments are described, an initial analysis of results being presented. The mean path loss and the standard deviation depend on the mutual location of transmitting and receiving...

• Radio Channel Measurements in Body-to-Body Communications in Different Scenarios

  Publication

  • S. J. Ambroziak
  • L. M. Correia
  • K. Turbić

  - Year 2016

  This paper presents body-to-body radio channel measurements at the 2.45 GHz band, for different body motion scenarios and on-body antenna placements, and both indoor and outdoor environments. Measurement equipment, investigated scenarios and considered environments are described, an initial analysis of results being presented. The mean path loss and the standard deviation depend on the mutual location of transmitting and receiving...

• Hybrid Laboratory of Radio Communication With Online Simulators and Remote Access

  Publication

  • J. Sadowski
  • J. Stefański

  - IEEE Transactions on Education - Year 2024

  Contribution: Two toolsets for the remote teaching of radio communication laboratory classes: 1) online simulators for individual work of students and 2) a remote access system to laboratory workstations for group work. Initial assumptions and method of implementation of both tools are presented. Background: The COVID-19 pandemic has forced a change in teaching at all levels of education. The specificity of practical classes, such...

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• Efficient methods for radio location service in cellular communication networks

  Publication

  • J. Stefański

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Year 2007

  W artykule przedstawiono dwie oryginalne metody lokalizowania terminala ruchomego w sieciach komórkowych trzeciej generacji. Metody te podczas estymacji położenia terminala nie wymagają znajomości różnicy czasów w synchronizacji poszczególnych stacji bazowych, przez co są tanie w implementacji. Przedstawiono wyniki badań symulacyjnych zaproponowanych metod.

• Propagation analysis of the point-to-point radio links operating in the band

  Publication

  • K. Bronk
  • R. Katulski
  • A. Lipka

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Year 2009

  The theoretical possibilities of utilizing the EHF-band frequencies for point-to-point short range communications have been discussed. The most important factors that affect propagation attenuation in this band have been briefly described, as well as relevant mathematical formulas that allow for numerical analysis of these phenomena. After that, a research have been carried out in which the authors have analyzed propagation losses...

• A History of Maritime Radio-Navigation Positioning Systems used in Poland

  Publication

  • C. Specht
  • A. Weintrit
  • M. Specht

  - JOURNAL OF NAVIGATION - Year 2016

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• Radio- and photosensitization of DNA with compounds containing platinum and bromine atoms

  Publication

  • M. Śmiałek-Telega
  • S. Ptasińska
  • J. Gow
  • S. Hoffmann
  • N. J. Mason

  - EUROPEAN PHYSICAL JOURNAL D - Year 2015

  . Irradiations of plasmid DNA by both X-rays and UV light in the presence and absence of compounds containing platinum and bromine atoms were performed in order to asses the sensitization potential of these compounds. Plasmid DNA pBR322 was incubated with platinum (II) bromide, hydrogen hexabromoplatinate (IV), hydrogen hexahydroxyplatinate (IV) and sodium hexahydroxyplatinate (IV). Incubation was followed by X-ray or UV irradiations....

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• Selective jamming of OFDM transmission in NB-IoT radio interface

  Publication

  • J. Magiera

  - Year 2023

  The paper presents the concept of smart jamming, which involves selective interference aimed at critical components of the OFDM signal. Research verifying the feasibility of this type of electronic attack are described. A realized testbed for jamming real NB-IoT signals in a downlink is presented. The test results demonstrate the feasibility of realizing selective jamming and its greater effectiveness compared to barrage interference.

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• The Historical Journal of Film, Radio and Television

  Journals

  ISSN: 0143-9685 , eISSN: 1465-3451

• Radio Electronics Computer Science Control

  Journals

  ISSN: 1607-3274 , eISSN: 2313-688X

• Indian Journal of Radio and Space Physics

  Journals

  ISSN: 0367-8393

• IEEE Journal of Radio Frequency Identification

  Journals

  eISSN: 2469-7281

• Impact of radio wave polarisation on off-body communications in indoor environments

  Publication

  • S. J. Ambroziak
  • L. M. Correia
  • R. Katulski
  • M. Maćkowiak

  - Year 2015

  This paper describes the measurements and the analysis of the impact of radio wave polarisation on off-body communications in Body Area Networks in indoor environments. Measurements on polarisation impact are briefly described. Five investigated scenarios with different body postures and different antenna placements are characterised. The difference between the vertical and horizontal components of the received radio signal are...

• Measurements of High-Speed Data Transmission Radio Link for Special Applications

  Publication

  • P. T. Kosz
  • P. Rajchowski
  • K. Cwalina
  • J. Stefański
  • J. Sadowski

  - Year 2017

  In the article measurements of high-speed data transmission radio link for special applications were presented. Build measurement stand, measurement scenario and obtained results were briefly described. All conducted research work took place in real maritime environment.

• An Empirical Propagation Model for Mobile Radio Links in Container Terminal Environment

  Publication

  • S. J. Ambroziak
  • R. Katulski

  - IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY - Year 2013

  In this paper, a novel empirical propagation model for mobile radio links in a container terminal environment is presented. Measurement propagation research carried out in the Deepwater Container Terminal (DCT) in Gdańsk, Poland is described, and the investigated environment is characterized. The results of the statistical evaluation of the new model are discussed. In addition, statistical tuning of the Walfisch–Ikegami model for...

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• Path Loss Measurements in Wideband Radio Link Designed for Maritime Environment

  Publication

  • P. Rajchowski
  • K. Cwalina
  • P. T. Kosz
  • J. Stefański
  • J. Sadowski

  - Year 2018

  In the article, the research and analysis of path loss in designed and evaluated digital radio link for high-speed data transmission in maritime environment is presented. Collected samples of received signal were used to determine the mean path loss and its standard deviation. Measuring campaign was carried out in a real maritime conditions. The mean value of path loss reached 126 dB on a distance of 11.16 km.