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  Subjects -> ELECTRONICS (Total: 202 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advanced Materials Technologies     Hybrid Journal  
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 9)
Advances in Electronics     Open Access   (Followers: 99)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Power Electronics     Open Access   (Followers: 39)
Advancing Microelectronics     Hybrid Journal  
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 28)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 15)
Australian Journal of Electrical and Electronics Engineering     Hybrid Journal  
Batteries     Open Access   (Followers: 9)
Batteries & Supercaps     Hybrid Journal   (Followers: 4)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 31)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 2)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 9)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 304)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access   (Followers: 2)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 123)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 108)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 103)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage     Hybrid Journal   (Followers: 1)
Energy Storage Materials     Full-text available via subscription   (Followers: 4)
EPE Journal : European Power Electronics and Drives     Hybrid Journal  
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
IACR Transactions on Symmetric Cryptology     Open Access   (Followers: 1)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 100)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 81)
IEEE Embedded Systems Letters     Hybrid Journal   (Followers: 56)
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology     Hybrid Journal   (Followers: 2)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 52)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Letters on Electromagnetic Compatibility Practice and Applications     Hybrid Journal   (Followers: 3)
IEEE Magnetics Letters     Hybrid Journal   (Followers: 7)
IEEE Nanotechnology Magazine     Hybrid Journal   (Followers: 42)
IEEE Open Journal of Circuits and Systems     Open Access   (Followers: 2)
IEEE Open Journal of Industry Applications     Open Access   (Followers: 2)
IEEE Open Journal of the Industrial Electronics Society     Open Access   (Followers: 2)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 77)
IEEE Pulse     Hybrid Journal   (Followers: 5)
IEEE Reviews in Biomedical Engineering     Hybrid Journal   (Followers: 22)
IEEE Solid-State Circuits Letters     Hybrid Journal   (Followers: 2)
IEEE Solid-State Circuits Magazine     Hybrid Journal   (Followers: 13)
IEEE Transactions on Aerospace and Electronic Systems     Hybrid Journal   (Followers: 364)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 74)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 59)
IEEE Transactions on Autonomous Mental Development     Hybrid Journal   (Followers: 8)
IEEE Transactions on Biomedical Engineering     Hybrid Journal   (Followers: 38)
IEEE Transactions on Broadcasting     Hybrid Journal   (Followers: 13)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 45)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Geoscience and Remote Sensing     Hybrid Journal   (Followers: 221)
IEEE Transactions on Haptics     Hybrid Journal   (Followers: 4)
IEEE Transactions on Industrial Electronics     Hybrid Journal   (Followers: 76)
IEEE Transactions on Industry Applications     Hybrid Journal   (Followers: 40)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 27)
IEEE Transactions on Learning Technologies     Full-text available via subscription   (Followers: 12)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 79)
IEEE Transactions on Services Computing     Hybrid Journal   (Followers: 4)
IEEE Transactions on Signal and Information Processing over Networks     Hybrid Journal   (Followers: 14)
IEEE Transactions on Software Engineering     Hybrid Journal   (Followers: 79)
IEEE Women in Engineering Magazine     Hybrid Journal   (Followers: 11)
IEEE/OSA Journal of Optical Communications and Networking     Hybrid Journal   (Followers: 16)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 59)
IET Smart Grid     Open Access   (Followers: 1)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 14)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 12)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 5)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 4)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 12)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 37)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronic Science and Technology     Open Access   (Followers: 1)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 181)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal   (Followers: 1)
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 31)
Journal of Power Electronics     Hybrid Journal   (Followers: 1)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 28)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 9)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 2)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 4)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 11)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 6)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 56)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Solid State Electronics Letters     Open Access  
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Transactions on Electrical and Electronic Materials     Hybrid Journal   (Followers: 1)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 7)
Ural Radio Engineering Journal     Open Access   (Followers: 1)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)

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Journal Cover
International Journal of Electronics and Telecommunications
Journal Prestige (SJR): 0.216
Citation Impact (citeScore): 1
Number of Followers: 13  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0867-6747 - ISSN (Online) 2300-1933
Published by Polska Akademia Nauk Homepage  [10 journals]
  • EMF exposure modelling in the vicinity of the radiocommunication stations

    • Authors: Dariusz Wiecek, Marcin Mora, Daniel Niewiadomski
      Pages: 5 - 10
      Abstract: Due to rapid development of wireless systems and future implementation of the 5G system, it is necessary to increase number of the stations and/or number of radio emissions in current and new mobile service frequency bands. For each of the new or modified radio installation in Poland the Electromagnetic Field (EMF) strength levels has to be evaluated and measured/validated in accordance with allowable limits. In the paper the model of estimation of total EMF levels coming from mobile base stations radio emissions to be used for estimation of the whole country territory EMF levels is proposed. Results of preliminary analysis were also shown on practical examples. The model presented in the paper can be used for initial finding of possible places where exist the risk of exceedance of the maximum exposure limits and for analysis of potential radio network development taking into account current regulatory limits. The model will be used in computerized system SI2PEM which is developing in Poland for EMF levels controlling and validation purposes.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • A Statistical Calibration Method of Propagation Prediction Model Based on
           Measurement Results

    • Authors: Jan M. Kelner, Michał Kryk, Jerzy Łopatka, Piotr Gajewski
      Pages: 11 - 16
      Abstract: Radio environment maps (REMs) are beginning to be an integral part of modern mobile radiocommunication systems and networks, especially for ad-hoc, cognitive, and dynamic spectrum access networks. The REMs will use emerging military systems of tactical communications. The REM is a kind of database used at the stage of planning and management of the radio resources and networks, which considers the geographical features of an area, environmental propagation properties, as well as the parameters of radio network elements and available services. At the REM, for spatial management of network nodes, various methods of propagation modeling for determining the attenuation and capacity of wireless links and radio ranges are used. One method of propagation prediction is based on a numerical solution of the wave equation in a parabolic form, which allows considering, i.a., atmospheric refraction, terrain shape, and soil electrical parameters. However, the determination of a current altitudinal profile of atmospheric refraction may be a problem. If the propagation-prediction model uses a fixed refraction profile, then the calibration of this model based on empirical measurements is required. We propose a methodology for calibrating the analyzed model based on an example empirical research scenario. The paper presents descriptions of the propagation model, test-bed and scenario used in measurements, and obtained signal attenuation results, which are used for the initial calibration of the model.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Interference in Multi-beam Antenna System of 5G Network

    • Authors: Jan M. Kelner, Cezary Ziółkowski
      Pages: 17 - 23
      Abstract: Massive multiple-input-multiple-output (MIMO) and beamforming are key technologies, which significantly influence on increasing effectiveness of emerging fifth-generation (5G) wireless communication systems, especially mobile-cellular networks. In this case, the increasing effectiveness is understood mainly as the growth of network capacity resulting from better diversification of radio resources due to their spatial multiplexing in macro- and micro-cells. However, using the narrow beams in lieu of the hitherto used cell-sector brings occurring interference between the neighboring beams in the massive-MIMO antenna system, especially, when they utilize the same frequency channel. An analysis of this effect is the aim of this paper. In this case, it is based on simulation studies, where a multi-elliptical propagation model and standard 3GPP model are used. We present the impact of direction and width of the neighboring beams of 5G new radio gNodeB base station equipped with the multi-beam antenna system on the interference level between these beams. The simulations are carried out for line-of-sight (LOS) and non-LOS conditions of a typical urban environment.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Application of the FPAA to Sample Input Signal for Laboratory Exercise:
           Pulse Amplitude Modulation

    • Authors: Lukas Chruszczyk, Damian Grzechca
      Pages: 25 - 28
      Abstract: This paper presents exemplary exercise on the fundamentals of signal processing course which is offered for second year bachelor level students. Application of Field Programmable Analog Array (FPAA) for pulse amplitude modulation (PAM) exercise is described with signal processing laboratory. There are presented two methods for implementing PAM modulation and demodulation technique in FPAA module. Example configuration files are available form
      Authors ’ web site.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Efficient relay node management in BLE MESH networks

    • Authors: Andrzej Bęben, Andrzej Bąk, Maciej Sosnowski
      Pages: 29 - 35
      Abstract: The Bluetooth Low Energy (BLE) MESH network technology gains popularity in low duty IoT systems. Its advantage is a low energy consumption that enables long lifetime of IoT systems. The paper proposes and evaluates new MRT management methods, i.e. exact and heuristic, that further improves energy efficiency of BLE MESH network by minimizing the number of active relay nodes. The performed experiments confirm efficiency of the MRT  methods resulting in significantly lower energy consumption of BLE MESH netwo
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Design of millimeter-wave six-port device for LTCC technology

    • Authors: Barbara Aleksandra Słojewska, Yevhen Yashchyshyn
      Pages: 37 - 43
      Abstract: In this paper a design of millimeter-wave six-port device for LTCC (Low Temperature Cofired Ceramic) technology is presented. Furthermore, problems with implementation of the project taking into account requirements of LTCC technology are discussed.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Wireless Capsule Endoscope Localization with Phase Detection Algorithm and
           Simplified Human Body Model

    • Authors: Paweł Oleksy, Łukasz Januszkiewicz
      Pages: 45 - 51
      Abstract: Wireless endoscopic capsules can visualize the inside of the digestive tract for the purpose of gastrointestinal diseases diagnose. In order to implement the appropriate treatment method, the transmitted picture should be followed by the information on the location of the endoscope. The article presents the method of localization of endoscopic capsules with wireless transmitter based on the detection of phase difference of signals in the receiver located on patients body. The proposed method uses simplified human body models that can change their dielectric properties to improve the location of the capsule endoscope.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Inertial sensors integrated with clothing to localize people inside
           buildings

    • Authors: Jarosław Kawecki, Łukasz Januszkiewicz, Paweł Oleksy
      Pages: 53 - 58
      Abstract: This article presents a wearable system that localizes people in the indoor environment, using data from inertial sensors. The sensors measure the parameters of human motion, tracking the movements of the torso and foot. For this purpose, they were integrated with shirt and the shoe insole. The values of acceleration measured by the sensors are sent via Bluetooth to a smartphone. The localization algorithm implemented on the smartphone, presented here, merges data from the shirt and the shoe to track the steps made by the user and filter out the artefacts caused by movements the shirt and torso. The experimental verification of the algorithm is also presented.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • A Solar-Powered Fertigation System based on Low-Cost Wireless Sensor
           Network Remotely Controlled by Farmer for Irrigation Cycles and Crops
           Growth Optimization

    • Authors: Paolo Visconti, Roberto De Fazio, Patrizio Primiceri, Donato Cafagna, Sergio Strazzella, Nicola Ivan Giannoccaro
      Pages: 59 - 68
      Abstract: Nowadays, the technological innovations affect all human activities; also the agriculture field heavily benefits of technologies as informatics, electronic, telecommunication, allowing huge improvements of productivity and resources exploitation. This manuscript presents an innovative low cost fertigation system for assisting the cultures by using data-processing electronic boards and wireless sensors network (WSN) connected to a remote software platform. The proposed system receives information related to air and soil parameters, by a custom solar-powered WSN. A control unit elaborates the acquired data by using dynamic agronomic models implemented on a cloud platform, for optimizing the amount and typology of fertilizers as well as the irrigations frequency, as function also of weather forecasts got by on-line weather service.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Low Delay Sparse and Mixed Excitation CELP Coders for Wideband Speech
           Coding

    • Authors: Przemyslaw Grzegorz Dymarski
      Pages: 69 - 76
      Abstract: Code Excited Linear Prediction (CELP) algorithms
      are proposed for compression of speech in 8 kHz band at
      switched or variable bit rate and algorithmic delay not exceeding
      2 msec. Two structures of Low-Delay CELP coders are analyzed:
      Low-delay sparse excitation and mixed excitation CELP. Sparse
      excitation is based on MP-MLQ and multilayer models. Mixed
      excitation CELP algorithm stems from the narrowband G.728
      standard. As opposed to G.728 LD-CELP coder, mixed excitation
      codebook consists of pseudorandom vectors and sequences
      obtained with Long-Term Prediction (LTP). Variable rate coding
      consists in maximizing vector dimension while keeping the
      required speech quality. Good speech quality (MOS=3.9
      according to PESQ algorithm) is obtained at average bit rate 33.5
      kbit/sec.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Routing policy validation for the integrated system supporting routing in
           Software Defined Networks (SDNRoute)

    • Authors: Piotr Jaglarz, Grzegorz Rzym, Piotr Jurkiewicz, Piotr Boryło, Piotr Chołda
      Pages: 77 - 83
      Abstract: In the article, a validation module, being a component of an integrated system supporting routing in software defined networks (SDNRoute), is proposed and thoroughly examined. The module allows for the verification of the results provided by the optimization module before these results are deployed in the production network. Routing policies are validated for their impact on the network quality parameters and against the threat of overloading (congestion).
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Analysis and Comparison of the Fade Phenomenon in the SFN DAB+ Network
           With Two and Three Transmitters

    • Authors: Ryszard J. Zielinski
      Pages: 85 - 92
      Abstract: Single Frequency Networks (SFN) of transmitters are currently used in television and digital broadcasting to effectively cover large areas using minimal spectral resources and using transmitters with much lower power than if the same area were covered using one transmitter. It is therefore a very ecological solution. In this way, much better reception conditions are obtained in large city areas, as the signal reaches the receiving antenna from different directions, reducing the risk of shading. However, in this type of network one should take into account the loss of signal caused by signal interference. Using the appropriate propagation model, it is possible, with appropriate assumptions, to check how the operation of the third transmitter affects the distribution and size of the deepest fades in relation to the network in which there are two transmitters.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Dense Wireless Network Inspired by the Nervous System

    • Authors: Łukasz Kułacz, Adrian Kliks
      Pages: 93 - 98
      Abstract: This work presents concepts of the use of algorithms inspired by the functions and properties of the nervous system in dense wireless networks. In particular, selected features of the brain consisting of a large number of nerve connections were analyzed, which is why they are a good model for a dense network. In addition, the action of a selected cells from the nervous system (such as neuron, microglia or astrocyte) as well as phenomena observed in it (e.g. neuroplasticity) are presented.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Combinatorial Properties and Defragmentation Algorithms in WSW1 Switching
           Fabrics

    • Authors: Wojciech Kabaciński, Remigiusz Rajewski, Atyaf Al-Tameemi
      Pages: 99 - 105
      Abstract: A spectrum defragmentation problem in elastic optical networks was considered under the assumption that all connections can be realized in switching nodes. But this assumption is true only when the switching fabric has appropriate combinatorial properties. In this paper, we consider a defragmentation problem in one architecture of wavelength-space-wavelength switching fabrics. First, we discuss the requirements for this switching fabric, below which defragmentation does not always end with success. Then, we propose defragmentation
      algorithms and evaluate them by simulation. The results show that proposed algorithms can increase the number of connections realized in the switching fabric and reduce the loss probability.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Review of applications of the Laboratory for Electromagnetic Compatibility
           infrastructure

    • Authors: Kamil Staniec, Zbigniew Jóskiewicz, Jarosław Janukiewicz, Tedeusz Więckowski
      Pages: 107 - 123
      Abstract: This article provides a thorough description of a range of non-standard application cases in which EMC laboratories can be used other than those traditionally associated with this kind of facilities. The areas covered here include investigations of: wireless and radio systems (such as IoT and broadband radio systems) also that require ultra-high operational dynamic range, emulation of interference-free and/or heavily-multipath propagation environment, shielding effectiveness of cabinets and materials (i.e. thin, light and flexible as textiles as well as heavy and thick such as building construction elements).
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Localization System Supporting People with Cognitive Impairment and Their
           Caregivers

    • Authors: Jerzy Kolakowski, Vitomir Djaja-Josko, Marcin Kolakowski, Jacek Cichocki
      Pages: 125 - 131
      Abstract: Localization systems are an important component
      of Ambient and Assisted Living platforms supporting persons
      with cognitive impairments. The paper presents a positioning
      system being a part of the platform developed within the IONIS
      European project. The system’s main function is providing the
      platform with data on user mobility and localization, which
      would be used to analyze his/her behavior and detect dementia
      wandering symptoms. An additional function of the system is
      localization of items, which are frequently misplaced by dementia
      sufferers.
      The paper includes a brief description of system’s architecture,
      design of anchor nodes and tags and exchange of data between
      devices. both localization algorithms for user and item positioning
      are also presented. Exemplary results illustrating the system’s
      capabilities are also included.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Suitability of Transport Techniques for Video Transmission in IP Networks

    • Authors: Tadeus Uhl, Janusz Klink, Christian Hoppe
      Pages: 133 - 138
      Abstract: The paper discusses the problem of video transmission in an IP network. The authors consider the ability of using the most popular video codecs that use both the MPEG2 Transport Stream and Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH). The main emphasis was given to ensuring the quality of service and quality assessment methods, taking into account not only the service- or network provider’s point of view but also the end user’s perspective. Two quality assessment approaches were presented, i.e. objective and subjective methods. The authors presented the results of the quality evaluation for H.264/MPEG-4, H.265/HEVC and VP9 codecs. The objective measurements, proved by statistical analysis of user opinion scores, confirmed the ability of using H.265 and VP9 codecs in both real time and streaming transmissions, while the quality of video streaming over HTTP with the H.264 codec proved inadequate. The authors also presented a connection between the dynamics of network bandwidth changing and MPEG-DASH mechanism operation and their influence on the
      quality experienced by users.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Quality assessment of musical and speech signals broadcasted via Single
           Frequency Network DAB+

    • Authors: Maurycy Jerzy Kin, Stefan Brachmański
      Pages: 139 - 144
      Abstract: Paper presents the results of quality assessment of speech and music signals transmitted via DAB+ system with the use of Single Frequency Network (SFN). The musical signals have been evaluated in overall quality domain. The subjective research was provided with the use of Absolute Category Rating procedure according to the ITU recommendation and the results have been presented as the MOS values for various bit rates. The speech signals were additionally examined with PESQ method. The results have shown that the assumed quality of 4 MOS, for this kind of broadcasting could be achieved at 48 kb/s for speech and 64 kb/s for music. This fact was confirmed by both: subjective and objective research. The comparison between the results obtained for SFN broadcasting with three emitters with single-emitter broadcast has been presented.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Traffic Modeling in Industrial Ethernet Networks

    • Authors: Michał Weissenberg, Mariusz Głąbowski, Sławomir Hanczewski, Maciej Stasiak, Piotr Zwierzykowski, Vito Bai
      Pages: 145 - 153
      Abstract: This article discusses the traffic types typically used in industrial networks. The authors propose a number of methods of generating traffic that can be used in modeling traffic sources in the networks under consideration. The proposed traffic models have been developed on the basis of the ON/OFF model. The proposed solutions can be applied to model typical traffic types that are used in industrial systems, such as Time-Triggered (TT) traffic, Audio-Video Bridging (AVB) traffic or Best Effort traffic. The article discusses four traffic models with modifications and shows how the proposed models can be used in modeling different traffic types used in industrial networks.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Modelling Pascal traffic in overflow systems

    • Authors: Mariusz Głąbowski, Damian Kmiecik
      Pages: 155 - 160
      Abstract: In this paper, impact of changes in parameters of offeredtraffic on the accuracy of determining the parameters of overflowtraffic in hierarchy systemswithmulti-service traffic was presented. Pascal typetrafficstreamswereoffered to the consideredsystems. The study investigated the impact of changes in the number of sources, intensity of trafficoffered by individualclasses, as well as changes in the trafficoffered by single free source. The presentedresultsarebased on determined relative errors of the values of overflowtrafficobtained in simulations and on the basis of calculations.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Computer aided planning of WLAN access networks

    • Authors: Sławomir Pluta, Jacek Pluta
      Pages: 161 - 166
      Abstract: An Internet application was developed to support the design process of the WLAN access network. The whole program was designed as a desktop application using the following languages: HTML, CSS and JavaScript. The main task of the application facilitates the planning process of the WLAN access network, including the location of multiple base stations.  There is an example of using the program in the WLAN network planning process. The main purpose of this application as the ability to carry out network planning using multiple base stations and provide radio coverage for the entire area served by Wireless Internet Service Provider, is obtained.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Efficiency of WLAN 802.11xx in the multi-hop topology

    • Authors: Sławomir Kubal
      Pages: 167 - 172
      Abstract: The article presents the research results of the performance of wireless multi-hop networks. The analysis of the decrease in performance of such networks depending on the number of hops was performed for three popular transmission techniques used in mesh networks: Hybrid Wireless Mesh Protocol (default routing protocol for 802.11s), Optimized Link State Routing Protocol and Wireless Distribution System. Based on the measurements results, mathematical models for the decreasing of network transmission parameters depending on the number of hops were developed.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Practical remarks on power consumption in WLAN access points

    • Authors: Michal Kowal, Kamil Staniec
      Pages: 173 - 178
      Abstract: The article presents the power consumptions measurements performed for three wireless routers operating in IEEE 802.11n standard. A typical consumer-class device Asus RT-AC66U was chosen, an operator-class Gateworks Laguna GW2387 and a router built based on the Raspberry Pi3 platform. The aim of experiments was to test the influence of the beacon interframe interval, a client association (joining) in the network and the transmission itself, on the lifetime of battery-powered devices. Theoretical calculations were also performed for the influence of the analyzed scenarios on the battery-powered devices.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Mobile IoT Systems in the Urban Area

    • Authors: Tomasz Kosiło, Karol Radecki, Jarosław Marski, Cezary Górski
      Pages: 179 - 185
      Abstract: An important element of Internet of Things systems (IoT) is wireless data transmission. Narrowband Internet of Things (NB-IoT) and LTE Cat M1 (LTE-M) are the new standards for such transmission intended for LTE cellular networks. Cellular network operators has recently launched such transmission. The article presents the results of measurements of NB-IoT transmission parameters in this network, inside the building and in open urban areas. The main features of the NB-IoT system and measuring equipment are briefly discussed.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • AEGIS – Mobile Device for Generating Electromagnetic Curtain for Special
           Applications and Countering the Threats of RCIED

    • Authors: Piotr Rajchowski, Krzysztof Kamil Cwalina, Jarosław Magiera, Alicja Olejniczak, Paweł Kosz, Agnieszka Czapiewska, Robert Burczyk, Krzysztof Kowalewski, Jarosław Sadowski, Sławomir Ambroziak
      Pages: 187 - 192
      Abstract: In the article the concept, design and realization of the technological demonstrator of a mobile device for generating an electromagnetic curtain (with a name AEGIS) were presented, both in the hardware and software areas. The device is designed to block the radio communication which allow detonating the Radio Controlled Improvised Explosive Devices (RCIEDs). The preliminary laboratory tests of the demonstrator for generating the jamming signal, that were presented in the paper, aimed at assessing the correctness of the device operation and verification of generated signal parameters. On the basis of the obtained results, the ability to jam the cellular systems as well as other radio devices operating in the frequency band from 400 MHz to 2700 MHz was assessed.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • A reactive algorithm for deducing nodal forwarding behavior in a multihop
           ad hoc wireless network in the presence of errors

    • Authors: Karol Rydzewski, Jerzy Konorski
      Pages: 193 - 199
      Abstract: A novel algorithm is presented to deduce individual nodal forwarding behavior from standard end to end acknowledgments. The algorithm is based on a well-established mathematical method and is robust to network related errors and nodal behavior changes. The proposed solution was verified in a network simulation, in which it performed well in a difficult environment and achieved sound results.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • The analysis of energy consumption in 6TiSCH network nodes working in
           sub-GHz band

    • Authors: Mateusz Kubaszek, Jan Macheta, Łukasz Krzak, Cezary Worek
      Pages: 201 - 210
      Abstract: The 6TiSCH communication stack enables IPv6 networking over the TSCH (Time Slotted Channel Hopping) mode of operation defined in IEEE 802.15.4. Lately, it becomes an attractive solution for Low power and Lossy Networks (LLNs), suitable for Industrial Internet of Things (IIoT) applications. This article introduces a credible energy consumption model for the 6TiSCH network nodes, operating in the 863-870 MHz band. It presents the analysis leading to the construction of the model as well as detailed verification through experimental measurements which showed 98% accuracy in determining power consumption for two different network topologies. The article includes reliable battery lifetime predictions for transit and leaf nodes along with other parametric study results.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Performance Analysis of Dynamic PUCCH Allocation Algorithm in LTE Network

    • Authors: Maciej Czerniecki, Jacek Wszołek, Marek Sikora, Wiesław Ludwin
      Pages: 211 - 216
      Abstract: The aim of the presented paper was to verify the impact of Dynamic PUCCH Resource Allocation Algorithm of the LTE cellular system on the maximum uplink cell throughput and call setup success rate - CSSR. Paper includes the laboratory testbed description and presents the results of an experiment confirming the improvement of both key performance indicators KPIs. Apart from the presentation of the Dynamic PUCCH Resource allocation algorithm, the paper also includes a description of legacy LTE uplink (PUCCH and PUSCH) channels dimensioning process thus filling the gap of such a tutorial in the available literature.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Space-Time-Frequency Machine Learning for Improved 4G/5G Energy Detection

    • Authors: Małgorzata Wasilewska, Hanna Bogucka
      Pages: 217 - 223
      Abstract: In this paper, the future Fifth Generation (5G New Radio) radio communication system has been considered, coexisting and sharing the spectrum with the incumbent Fourth Generation (4G) Long-Term Evolution (LTE) system. The 4G signal presence is detected in order to allow for opportunistic and dynamic spectrum access of 5G users. This detection is based on known sensing methods, such as energy detection, however, it uses machine learning in the domains of space, time and frequency for sensing quality improvement. Simulation results for the considered methods: k-Nearest Neighbors and Random Forest show that these method significantly improves the detection probability.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • A PERFORMANCE ANALYSIS OF IEEE 802.11ax NETWORKS

    • Authors: Marek Natkaniec, Łukasz Prasnal, Michał Szymakowski
      Pages: 225 - 230
      Abstract: The paper is focused on the forthcoming IEEE 802.11ax standard and its influence on Wi-Fi networks performance. The most important features dedicated to improve transmission effectiveness are presented. Furthermore, the simulation results of a new transmission modes are described. The comparison with the legacy IEEE 802.11n/ac standards shows that even partial implementation of a new standard should bring significant throughput improvements.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Radio Dispatching Communications During a Mass Event - A Case Studies of
           the “Lednica 2000” Youth Meetings

    • Authors: Henryk Gierszal, Jacek Jarzina, Sławek Fryska, Sylwia Fryska
      Pages: 231 - 236
      Abstract: In paper we present two case studies of the wireless dispatching communications. The first one aims at providing voice service and FM radio broadcasting during mass events of the “Lednica 2000” Youth Meetings. The presentation is supported by over 20-year experience in organization of this event every year. In the second use study we analyze evolution of the dispatching networks in the energy sector. These networks can be used by PPDR agencies in the situation of disasters and other crisis occurrences.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Statement and Solution of Multicriteria Tasks of Database Modular
           Block-Schemes Development

    • Authors: Waldemar Wójcik, Aliya Kalizhanova, Ainur Kozbakova, Sultan Akhmetov, Gulnaz Nabiyeva
      Pages: 237 - 242
      Abstract: The paper considers developed and offered an effective algorithm for solving the block-symmetrical tasks of polynomial computational complexity of data processing modular block-schemes designing.Currently, there are a large number of technologies and tools that allow you to create information systems of any class and purpose. To solve the problems of designing effective information systems, various models and methods are used, in particular, mathematical discrete programming methods. At the same time, it is known that such tasks have exponential computational complexity and can not always be used to solve practical problems. In this regard, there is a need to develop models
      and methods of the new class, which provide the solution of applied problems of discrete programming, aimed at solving problems of large dimensions. The work has developed and proposed block-symmetric models and methods as a new class of discrete programming problems that allow us to set and solve applied problems from various spheres of human activity.The issues of using the developed models are considered.
      and methods for computer-aided design of information systems (IS).
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
  • Cyber(in)security

    • Authors: Krzysztof Szczypiorski
      Pages: 243 - 248
      Abstract: The purpose of this article is to present three theses – (1) a cultural one: cyberspace is an advanced technical and cultural creation – it is an embodiment of dreams of numerous creators, inventors and engineers; (2) a technical one: security and cyberspace are inseparable components (hence cybersecu- rity); (3) and a paranoid one: complete security, if achievable, is not a permanent state (hence cyber(in)security). Cyberspace is conceived as a set of digital techniques used to exchange information but also as a new type of social space, partially virtual, which may constitute a being entirely separated from a physical one. A pivotal date for arising of cyberspace may be considered the year 1968 in which routing in the ARPANET network appeared and so did the first programmable logical controller (PLC). For cyberspace this will be the year 1976 – publishing of the key agreement protocol by Witfield Diffie and Martin Hellman. Development of security is correlated with warfare and armament – the military sector has historically made the most significant investments in this area.
      PubDate: 2020-02-06
      Issue No: Vol. 66, No. 1 (2020)
       
 
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