Wyniki wyszukiwania dla: GNU RADIO COMPANION

• Application of the GNU Radio platform in the multistatic radar

  Publikacja

  • B. Szlachetko
  • A. Lewandowski

  - Rok 2009

  Pełny tekst do pobrania w serwisie zewnętrznym

• OPROGRAMOWANIE I SPRZĘT W TECHNOLOGII RADIA PROGRAMOWALNEGO

  Publikacja

  • A. Marczak

  - Rok 2014

  Technologia radia programowalnego (ang. Software Defined Radio) umożliwia realizację urządzeń pracujących w różnego rodzaju cywilnych i wojskowych systemach radiowych. W pracy zaprezentowano zagadnienia dotyczące koncepcji realizacji radia programowalnego. Zaprezentowano oprogramowanie GNU Radio, służące do realizacji operacji przetwarzania sygnałów w torach nadawczo-odbiorczych urządzeń zrealizowanych w technologii SDR. Przedstawiono...

• REALIZACJA INTERFEJSU RADIOWEGO OFDM W TECHNOLOGII RADIA PROGRAMOWALNEGO DO ZASTOSOWAŃ TRANSPORTOWYCH

  Publikacja

  • A. Marczak

  - PRACE NAUKOWE POLITECHNIKI WARSZAWSKIEJ. SERIA: TRANSPORT - Rok 2016

  Metoda wielodostępu OFDM, jest stosowana obecnie w wielu standardach łączności radiowej, w tym w standardzie IEEE802.11p, który jest przewidziany do wykorzystania w Samochodowym Systemie Komunikacji. Technologia radia programowalnego (ang. Software Defined Radio) umożliwia realizacje urządzeń pracujących z tą metodą wielodostępu. W referacie zaprezentowano oprogramowanie GNU Radio i środowisko graficzne GNU Radio Companion służące...

  Pełny tekst do pobrania w portalu

• REALIZACJA INTERFEJSU RADIOWEGO OFDM W TECHNOLOGII RADIA PROGRAMOWALNEGO DO ZASTOSOWAŃ WOJSKOWYCH

  Publikacja

  • A. Marczak

  - Rok 2016

  Metoda wielodostępu OFDM, jest stosowana obecnie w wielu standardach łączności radiowej, w tym w standardzie IEEE802.11p, który jest przewidziany do realizacji transmisji danych pomiędzy pojazdami, oraz pomiędzy pojazdami i infrastrukturą znajdującą się w pobliżu drogi. Technologia radia programowalnego (ang. Software Defined Radio) umożliwia realizacje urządzeń pracujących z tą metodą wielodostępu. W referacie zaprezentowano oprogramowanie...

• TECHNOLOGIA RADIA PROGRAMOWALNEGO W TRANSPORCIE SZYNOWYM

  Publikacja

  • A. Marczak

  - Problemy Kolejnictwa - Rok 2015

  Technologia radia programowalnego umożliwia wykonanie urządzeń pracujących w różnego rodzaju analogowych i cyfrowych systemach łączności radiowej. W artykule zaprezentowano zagadnienia dotyczące koncepcji przeprowadzenia radia programowalnego. Zaprezentowano oprogramowanie GNU Radio, służące do realizacji operacji przetwarzania sygnałów w torach nadawczo-odbiorczych urządzeń zrealizowanych w technologii SDR. Przedstawiono również...

  Pełny tekst do pobrania w portalu

• Technologia radia programowalnego w procesie kształcenia studentów ICT

  Publikacja

  • P. Falkowski-Gilski

  - Rok 2015

  Technologie informacyjne i telekomunikacyjne ICT (Information and Communication Technologies) są współcześnie synonimem nowoczesności, innowacyjności oraz jednym z głównych czynników wzrostu społeczno-gospodarczego. Uczelnie wyższe stoją przed wyzwaniem, aby dostosować program studiów i metody nauczania do potrzeb rynku, przy jednoczesnym zachowaniu wysokiej jakości kształcenia. Obecnie studenci wyższych uczelni na kierunkach technicznych...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Kreowanie wartości publicznej przez wykorzystanie wolnego i otwartego oprogramowania GNU Health

  Publikacja

  • A. Baj-Rogowska

  - Roczniki Kolegium Analiz Ekonomicznych - Rok 2018

  Głównym celem pracy jest prezentacja roli, potencjału i funkcjonalności oprogramowania GNU Health. Ten zaawansowany i dojrzały, wysokiej jakości produkt - opracowany i nieustannie rozwijany w ramach projektu wolnego i otwartego oprogramowania - jest z sukcesem wdrażany w placówkach ochrony zdrowia w wielu krajach. Jego zastosowanie przyczynia się nie tylko do usprawnień w zarządzaniu praktyką medyczną lecz również odgrywa ważną...

  Pełny tekst do pobrania w portalu

• Multi-Aspect Quality Assessment Of Mobile Image Classifiers For Companion Applications In The Publishing Sector

  Publikacja

  • K. Draszawka

  - Rok 2021

  The paper presents the problem of quality assessment of image classifiers used in mobile phones for complimentary companion applications. The advantages of using this kind of applications have been described and a Narrator on Demand (NoD) functionality has been described as one of the examples, where the application plays an audio file related to a book page that is physically in front of the phone's camera. For such a NoD application,...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Wideband Radio Direction Finder Implemented in Software Defined Radio Technology

  Publikacja

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

  - Applied Mechanics and Materials - Rok 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.

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

  Publikacja

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

  - Rok 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...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Measuring research on radio wave propagation

  Publikacja

  • S. J. Ambroziak

  - Rok 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

  Publikacja

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

  - International Journal of Electronics and Telecommunications - Rok 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...

  Pełny tekst do pobrania w portalu

• Survey of Radio Navigation Systems

  Publikacja

  • P. Falkowski-Gilski
  • J. Stefański

  - International Journal of Electronics and Telecommunications - Rok 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,...

  Pełny tekst do pobrania w portalu

• Radio programowalne - nowoczesna platforma dydaktyczna

  Publikacja

  • P. Falkowski-Gilski
  • J. Stefański

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 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.

• Design of radio communication systems for unmanned transport applications

  Publikacja

  • S. Gajewski

  - Archives of Transport System Telematics - Rok 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

  Publikacja

  • J. Stefański

  - Metrology and Measurement Systems - Rok 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...

  Pełny tekst do pobrania w portalu

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

  Publikacja

  • A. Marczak

  - Rok 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.

  Pełny tekst do pobrania w serwisie zewnętrznym

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

  Publikacja

  • P. Falkowski-Gilski

  - Rok 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...

  Pełny tekst do pobrania w serwisie zewnętrznym

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

  Publikacja

  • J. Sadowski

  - International Journal of Antennas and Propagation - Rok 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...

  Pełny tekst do pobrania w portalu

• Towards 5G — Cloud-based Radio Access Networks

  Publikacja

  • S. Gajewski

  - Zeszyty Naukowe Akademii Marynarki Wojennej - Rok 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...

  Pełny tekst do pobrania w portalu

• Velocity measurement using the fdoa method in ground-based radio navigation system

  Publikacja

  • J. Sadowski

  - Metrology and Measurement Systems - Rok 2014

  Velocity is one of the main navigation parameters of the moving objects. However some systems of position estimation using radio wave measurements cannot provide velocity data due to limitation of their performance. In this paper a velocity measurement method for DS-CDMA radio navigation system is proposed, which doesn’t require full synchronization of reference stations carrier frequencies. The article presents basics of FDOA...

  Pełny tekst do pobrania w portalu

• Measurement and Analysis of the Radio Wave Polarisation in Off-Body Communications in Indoor Environment

  Publikacja

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

  - Rok 2014

  The paper describes an analysis of the radio wave polarisation in off-body communications in indoor environment. The measurement stand for polarisation measurements has been shortly described. Five investigated scenarios with different body postures and different antenna placements have been characterize. The vertical and horizontal components of received radio signal have been analysed. The measure used in analysis is a ratio...

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

  Publikacja

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

  - Rok 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...

• Efficiency of IEEE 802.15.4a UWB Impulse Radio Spectrum Shaping

  Publikacja

  • J. Sadowski
  • R. Katulski

  - Rok 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.

• Audio Content and Crowdsourcing: A Subjective Quality Evaluation of Radio Programs Streamed Online

  Publikacja

  • P. Falkowski-Gilski

  - Rok 2023

  Radio broadcasting has been present in our lives for over 100 years. The transmission of speech and music signals accompanies us from an early age. Broadcasts provide the latest information from home and abroad. They also shape musical tastes and allow many artists to share their creativity. Modern distribution involves transmission over a number of terrestrial systems. The most popular are analog FM (Frequency Modulation) and...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Hyperbolic Asynchronous Method of a Radio Navigation Technique

  Publikacja

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

  - Applied Sciences-Basel - Rok 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....

  Pełny tekst do pobrania w portalu

• Estimation of transmission quality in cellular systems based on indicators measured by the radio module

  Publikacja

  • O. Błaszkiewicz
  • R. Burczyk
  • A. Czapiewska
  • M. Gajewska
  • S. Gajewski
  • J. Sadowski

  - Rok 2022

  The article presents a measurement stand for testing transmission quality in cellular systems such as LTE, NB-IoT, UMTS and GSM. The results of BLER and throughput measurements for various propagation conditions as well as results of quality indicators appropriate for mentioned technologies measured by commercial radio module are presented. Those measurements were utilized to analyze the possibility of estimating the transmission...

  Pełny tekst do pobrania w serwisie zewnętrznym

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

  Publikacja

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

  - Rok 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.

• Research and analysis of high-speed data transmission radio link designed for maritime environment

  Publikacja

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

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2017

  In these article the realization of digital radio link for high-speed data transmission was presented. Its concept and practical realization, using USRP devices from National Instruments, were described. Developed software for generation and reception of digital signals in baseband, including description of modulation types, and time and frequency synchronization mechanisms, was presented. Moreover, an operation of designed radio...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Research and Analysis of High-Speed Data Transmission Radio Link Designed for Maritime Environment

  Publikacja

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

  - Rok 2017

  In these article, the realization of digital radio link for high-speed data transmission was presented. Its concept and practical realization, using USRP devices from National Instruments, were described. Developed software for generation and reception of digital signals in baseband, including description of modulation types, and time and frequency synchronization mechanisms, was presented. Moreover, an operation of designed radio...

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

  Publikacja

  • S. J. Ambroziak
  • R. Katulski

  - IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY - Rok 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...

  Pełny tekst do pobrania w portalu

• Digital Transformation of Terrestrial Radio: An Analysis of Simulcasted Broadcasts in FM and DAB+ for a Smart and Successful Switchover

  Publikacja

  • P. Falkowski-Gilski

  - Applied Sciences-Basel - Rok 2021

  The process of digitizing radio is far from over. It is an important interdisciplinary aspect, involving Big Data and AI (Artificial Intelligence) when it comes to classifying and handling content, and an organizational challenge in the Industry 4.0 concept. There exist several methods for delivering audio signals, including terrestrial broadcasting and internet streaming. Among them, the DAB+ (Digital Audio Broadcasting plus)...

  Pełny tekst do pobrania w portalu

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

  Publikacja

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

  - Rok 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.

• Performance analysis of data transmission in MC-CDMA radio interface with turbo codes

  Publikacja

  • A. Marczak

  - TELECOMMUNICATION SYSTEMS - Rok 2014

  Multi-carrier code division multiple access (MC-CDMA) technique is a combination of two radio access techniques: CDMA and orthogonal frequency division multiplexing and has the advantages of both techniques. The paper presents the design of transmitter and receiver for MC-CDMA radio interface. It also presents encoders and decoders of turbo codes which were used in simulation of the MC-CDMA technique. Two turbo codes with 8-state...

  Pełny tekst do pobrania w portalu

• Reception of Terrestrial DAB+ and FM Radio with a Mobile Device: A Subjective Quality Evaluation

  Publikacja

  • P. Falkowski-Gilski

  - Rok 2023

  Nowadays, terrestrial broadcasting enables to receive content anytime and everywhere. People can obtain information both with a portable or desktop receiver, which include pocket-sized devices as well as high-end Hi-Fi equipment, not to mention car audio systems. Numerous manufacturers include FM-compatible chipsets in a variety of user equipment (UE), including mobile phones. However, digital radio signal processing modules, such...

  Pełny tekst do pobrania w serwisie zewnętrznym

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

  Publikacja

  • P. Falkowski-Gilski

  - Archives of Acoustics - Rok 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...

  Pełny tekst do pobrania w portalu

• DS-CDMA receiver in Software Defined Radio technology. Admission to the implementation of a RAKE receiver

  Publikacja

  • W. Siwicki
  • J. Stefański

  - Rok 2010

  Programmable radio is one of the latest trends in the construction of multi-standard receivers. The technology, called Software Defined Radio (SDR), is also an ideal test platform that allows to try out different algorithms of signal receiving. This particular feature led to choose this platform to implement a DS-CDMA receiver (Direct Sequence Code Division Multiple Access). The use of SDR allows for a gradual upgrade of data processing...

• Design of OFDM-based radio communication systems for coast-to-sea and coast-to-air propagation environments

  Publikacja

  • S. Gajewski

  - Polish Maritime Research - Rok 2016

  In the paper the study of radio communication system design process for systems based on OFDM transmission is considered. The signal propagation model for 1.4 GHz frequency band is discussed, and the study of signal propagation characteristics, important from the point of view of OFDM system design, is presented. The methodology of OFDM interface design is proposed and some characteristics of the OFDM-based radio communication...

  Pełny tekst do pobrania w portalu

• Implementation of high-speed data transmission technological demonstrator using software defined radio technology

  Publikacja

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

  - Rok 2017

  In the article implementation of high-speed data transmission technological demonstrator using software defined radio technology is presented. A system architecture design including asymmetric framing transmission organization, which differs from the ones used in cellular systems is described. The construction of technological demonstrator consisting of management unit, radio unit and programmable multithreaded software performing...

• Person Tracking in a Ferry Environment Using Ultra-Wide Band Radio Interface

  Publikacja

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

  - Rok 2019

  This article presents research and analysis of effectiveness of tracking moving people in an environment of passenger ferry, using measurements of propagation time of ultra-wide band radio signal (UWB - Ultra-Wide Band). Constructed measurement stand and results of measurements carried out in a real propagation conditions were shortly discussed.

• Radio Channel Measurements in 868 MHz Off-Body Communications in a Ferry Environment

  Publikacja

  • K. Cwalina
  • S. J. Ambroziak
  • P. Rajchowski
  • L. M. Correia

  - Rok 2017

  In this paper, a characterization of the 868 MHz off-body radio channel in BANs is presented. Measurements were carried out in a ferry environment using a specific set-up. A method for path loss using radio distance measurements (RDMs) was developed. It allows to automate the measurements process and make it independent from the variable speed of a moving person. Based on the observed path loss as a function of distance, the obtained...

• Implementation of high-speed data transmission technological demonstrator using software defined radio technology

  Publikacja

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

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2017

  In the article implementation of a high-speed data transmission technological demonstrator using software defined radio technology is presented. A system architecture design including asymmetric framing transmission organization, which differs from the ones used in cellular systems is described. The construction of technological demonstrator consisting of a management unit, radio unit and programmable multi-threaded software performing...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Narrowband Transmission Quality in Presence of Modified IEEE 802.15.4a Impulse Radio Interference

  Publikacja

  • J. Sadowski

  - Rok 2011

  This paper presents results of measurement of narrowband transmission quality in presence of impulse radio UWB interference. IEEE 802.15.4a UWB signal is being used as interferer, also with frame structure modifications which lead to change spectrum of the interference. Equations and coefficients which allow to calculate ratio between power of useful and interference signal are also presented.

• Efficiency of the Use of LTE System Radio Resources in Highway Transport Enironment

  Publikacja

  • S. Gajewski

  - Archives of Transport System Telematics - Rok 2014

  The paper describes the problem of analysis of throughput-coverage characteristics of the LTE system. Simulation results of the efficiency of the use of LTE radio resources are presented. Simulation studies on the basis of original model of the LTE network simulator were carried out. In addition, the evaluation of throughput for a single connection, and available capacity were evaluated in the context of the use of the same...

• Tracking body movement for radio channel measurements in BAN with indoor positioning system

  Publikacja

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

  - Rok 2016

  This paper presents indoor positioning system based on inertial navigation with additional distance measurements using UWB modems and map matching to increase accuracy and eliminate position drift. Such system may be used to track position of human body during radio channel measurements for body area networks. Performance of proposed system and limitations caused by inertial navigation are briefly described.

• Perspectives of Transport Systems Development in the Light of Radio Communication Systems Evolution Towards 5G

  Publikacja

  • S. Gajewski

  - Rok 2017

  In the paper conditions of development and implementation of transport systems with reference to the development of radio communication networks towards 5G are presented. First, general properties of next generation systems are mentioned and their architecture. Moreover, planned characteristics of B4G and 5G systems are depicted which can significantly contribute to the promotion and development of transport systems. In particular...

  Pełny tekst do pobrania w serwisie zewnętrznym

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

  Publikacja

  • P. Matusz
  • J. Woźniak

  - Rok 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...

• Low Power Baseband Processor for M2M Reconfigurable Radio Test Platform

  Publikacja

  • K. Bizewski
  • Ł. Kulas
  • K. Nyka

  - Rok 2012

  Software Defined Radio (SDR) is becoming more andmore frequently used technique for wireless communication. Itfacilitates as fast prototyping and is a versatile method fordeveloping new communication systems. SDR can be realizedbased on high computational capacity platform, where powerconsumption is no a primary concern like i.e. DVB or BTStransmitters. Another trend are low power systems, whereavailable power in reduced and more...

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

  Publikacja

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

  - Rok 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

  Publikacja

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

  - Rok 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...