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  Subjects -> ELECTRONICS (Total: 173 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 5)
Advances in Electronics     Open Access   (Followers: 73)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 32)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 298)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
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: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 20)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 43)
China Communications     Full-text available via subscription   (Followers: 8)
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: 247)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electronic Design     Partially Free   (Followers: 101)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 84)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 91)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 48)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 2)
EPJ Quantum Technology     Open Access  
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)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 182)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 95)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 77)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 46)
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 Power Electronics Magazine     Full-text available via subscription   (Followers: 64)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 68)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 54)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 18)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 38)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 27)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 68)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 11)
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  
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 34)
IET Power Electronics     Hybrid Journal   (Followers: 44)
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: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 54)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 20)
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: 12)
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: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 5)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
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: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 14)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
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: 23)
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: 3)
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: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 10)
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: 23)
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: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Field Robotics     Hybrid Journal   (Followers: 2)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 156)
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: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 9)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 9)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 3)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 28)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 4)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 18)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 32)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal  
Networks: an International Journal     Hybrid Journal   (Followers: 6)
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 53)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 75)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
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: 8)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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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  [9 journals]
  • Determination of input parameters of the neural network model, intended
           for phoneme recognition of a voice signal in the systems of distance
           learning

    • Authors: Berik Akhmetov, Igor Tereykovsky, Aliya Doszhanova, Lyudmila Tereykovskaya
      Pages: 425 - 432
      Abstract: The article is devoted to the problem of voice
      signals recognition means introduction in the system of distance
      learning. The results of the conducted research determine the
      prospects of neural network means of phoneme recognition.
      It is also shown that the main diculties of creation of the
      neural network model, intended for recognition of phonemes
      in the system of distance learning, are connected with the
      uncertain duration of a phoneme-like element. Due to this
      reason for recognition of phonemes, it is impossible to use
      the most eective type of neural network model on the basis
      of a multilayered perceptron, at which the number of input
      parameters is a xed value. To mitigate this shortcoming, the
      procedure, allowing to transform the non-stationary digitized
      voice signal to the xed quantity of mel-cepstral coecients,
      which are the basis for calculation of input parameters of
      the neural network model, is developed. In contrast to the
      known ones, the possibility of linear scaling of phoneme-
      like elements is available in the procedure. The number of
      computer experiments conrmed expediency of the fact that
      the use of the oered coding procedure of input parameters
      provides the acceptable accuracy of neural network recognition
      of phonemes under near-natural conditions of the distance
      learning system. Moreover, the prospects of further research in
      the eld of development of neural network means of phoneme
      recognition of a voice signal in the system of distance learning
      is connected with an increase in admissible noise level. Besides,
      the adaptation of the oered procedure to various natural
      languages, as well as to other applied tasks, for instance, a
      problem of biometric authentication in the banking sector, is
      also of great interest.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Damped Zero-Pseudorandom Noise OFDM Systems

    • Authors: Ahmed Hamada Esmaiel
      Pages: 433 - 438
      Abstract: This paper proposed a new OFDM scheme called damped zero-pseudorandom noise orthogonal frequency division multiplexing (DZPN-OFDM) scheme. In the proposed scheme, ZPN-OFDM non-zero part damped to reduce the guard interval energy as well as the mutual interference power in-between the data and training blocks, and conservative the pseudo-noise conventional properties required for channel estimation or synchronization. The motivation of this paper is the OFDM long guard interval working in wide dispersion channels, where significant energy waste if conventional ZPN-OFDM is used as well as the BER performance degradation. Also, to solve the ZPN-OFDM spectrum efficiency loss problem, the proposed scheme doesn’t duplicate the guard interval. Both detailed performance analysis and simulation results show that the proposed DZPN-OFDM scheme can, indeed, offer significant bit error rate, spectrum efficiency as well as energy efficiency improvement.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Finding optimal frequency and spatial filters accompanying blind signal
           separation of\\ EEG data for SSVEP-based BCI

    • Authors: Marcin Jukiewicz, Mikołaj Buchwald, Anna Cysewska-Sobusiak
      Pages: 439 - 444
      Abstract: Brain-computer interface (BCI) is a device which allows paralyzed people to navigate a robot, prosthesis or wheelchair using only their own brains’ reactions. By creating a direct communication pathway between the human brain and a machine, without muscles contractions or activity from within the peripheral nervous system, BCI makes mapping person’s intentions onto directive signals possible. One of the most commonly utilized phenomena in BCI is steady-state visually evoked potentials (SSVEP). If subject focuses attention on the flashing stimulus (with specified frequency) presented on the computer screen, a signal of the same frequency will appear in his or hers visual cortex and from there it can be measured. When there is more than one stimulus on the screen (each flashing with a different frequency) then based on the outcomes of the signal analysis we can predict at which of these objects (e.g., rectangles) subject was/is looking at that particular moment. Proper preprocessing steps have taken place in order to obtain maximally accurate stimuli recognition (as the specific frequency). In the current article, we compared various preprocessing and processing methods for BCI purposes. Combinations of spatial and temporal filtration methods and the proceeding blind source separation (BSS) were evaluated in terms of the resulting decoding accuracy. Canonical-correlation analysis (CCA) to signals classification was used.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Smart e-Learning Systems with Big Data

    • Authors: Luca Caviglione, Mauro Coccoli
      Pages: 445 - 450
      Abstract: Nowadays, the Internet connects people, multimedia and physical objects leading to a new-wave of services. This includes learning applications, which require to manage huge and mixed volumes of information coming from Web and social media, smart-cities and Internet of Things nodes. Unfortunately, designing smart e-learning systems able to take advantage of such a complex technological space raises different challenges. In this perspective, this paper introduces a reference architecture for the development of future and big-data-capable e-learning platforms. Also, it showcases how data can be used to enrich the learning process.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Influence of selected parameters on radiant intensity measurement results
           – light meter and CCD camera comparison

    • Authors: Joanna Parzych
      Pages: 451 - 456
      Abstract: This work concerns measurements of the radiant intensity emitted by LEDs. The influence of selected factors and parameters on the final measurement result are discussed. The research was conducted using two type of detectors: light meter and CCD camera, to compare the degree of influence of these parameters depending on the measurement instrument used.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • SHAH: Hash Function based on Irregularly Decimated Chaotic Map

    • Authors: Mihaela Todorova, Borislav Stoyanov, Krzysztof Szczypiorski, Krasimir Kordov
      Pages: 457 - 465
      Abstract: In this paper, we propose a novel hash function based on irregularly decimated chaotic map. The hash function called SHAH is based on two Tinkerbell maps filtered with irregular decimation rule. Exact study has been provided on the novel scheme using distribution analysis, sensitivity analysis, static analysis of diffusion and confusion, and collision analysis. The experimental data show that SHAH satisfied admirable level of security.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Modeling of the decision-making procedure for financing of cyber security
           means of cloud services by the medium of a bilinear multistep quality game
           with several terminal surfaces

    • Authors: Valery Lakhno, Berik Akhmetov, Volodimir Malyukov, Timur Saatdinovich Kartbayev
      Pages: 467 - 472
      Abstract: The model is developed for the intellectualized
      decision-making support system on financing of cyber security
      means of transport cloud-based computing infrastructures, given
      the limited financial resources. The model is based on the use of
      the theory of multistep games tools. The decision, which gives
      specialists a chance to effectively assess risks in the financing
      processes of cyber security means, is found. The model differs
      from the existing approaches in the decision of bilinear multistep
      quality games with several terminal surfaces. The decision of
      bilinear multistep quality games with dependent movements is
      found. On the basis of the decision for a one-step game, founded
      by application of the domination method and developed for
      infinite antagonistic games, the conclusion about risks for players
      is drawn. The results of a simulation experiment within program
      implementation of the intellectualized decision-making support
      system in the field of financing of cyber security means of cloudbased
      computing infrastructures on transport are described. Confirmed
      during the simulation experiment, the decision assumes
      accounting a financial component of cyber defense strategy at
      any ratios of the parameters, describing financing process.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Advanced real-time evaluation and data quality monitoring model
           integration with FPGAs for tokamak high-performance soft X-ray diagnostic
           system

    • Authors: Andrzej Wojeński, Krzysztof T. Pozniak, Didier Mazon, Maryna Chernyshova
      Pages: 473 - 479
      Abstract: Based on the publications regarding new or recent measurement systems for the tokamak plasma experiments, it can be found that the monitoring and quality validation of input signals for the computation stage is done in different, often simple, ways. In the paper is described the unique approach to implement the novel evaluation and data quality monitoring (EDQM) model for use in various measurement systems. The adaptation of the model is made for the GEM-based soft
      X-ray measurement system FPGA-based. The EDQM elements has been connected to the base firmware using PCI-E DMA real-time data streaming with minimal modification. As additional storage, on-board DDR3 memory has been used. Description of implemented elements is provided, along with designed data processing tools and advanced simulation environment based on Questa software.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Uplink NOMA Scheme for Wi-Fi Applications

    • Authors: Hind Salim Ghazi, Krzysztof Wesolowski
      Pages: 481 - 485
      Abstract: Non-Orthogonal Multiple Access (NOMA) with Successive Interference Cancellation (SIC) is one of the promising techniques proposed for 5G systems. It allows multiple users with different channel coefficients to share the same (time/frequency) resources by allocating several levels of (power/code) to them. In this article, a design of a cooperative scheme for the uplink NOMA Wi-Fi transmission (according to IEEE 802.11 standards) is investigated. Various channel models are exploited to examine the system throughput. Convolutional coding in conformance to IEEE 802.11a/g is applied to evaluate the system performance. The simulation results have been addressed to give a clear picture of the performance of the investigated system.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • The positioning accuracy based on the UWB technology for an object on
           circular trajectory

    • Authors: Damian Grzechca, Krzysztof Hanzel
      Pages: 487 - 494
      Abstract: This paper presents the comparison of filtering methods – median filtration, moving average Kalman filtration and filtration based on a distance difference to determine the most accurate arm length for circular motion, as a model of wind turbine propellers movement. The experiments have been performed with the UWB technology system containing four anchors and a tag attached to 90cm arm that was rotated with speed up to 34.5 rad/s (as a linear speed of 50km/h). The trilateration concept based on the signal latency has been described in order to determinate the position of an object on circular trajectory. The main objective is the circle plane rotation (parallel and perpendicular) with respect to the anchors plane reference system. All research tasks have been performed for various cases of motion schemes in order to get the filtration method for object in motion under best accuracy goal. Filtration methods have been applied on one of two stages of the positioning algorithm: (1) on raw data got from the single anchor-tag (before trilateration); (2) on the position obtained from four anchors and tag (after trilateration). It has been proven that the appropriate filtering allows for higher location accuracy. Moreover, location capabilities with the use of UWB technology – shows prospective use of positioning of objects without access to other positioning forms (ex. GPS) in many aspects of life such as currently developing renewable, green energy sources like wind turbines where the circular motion plays an important role, and precise positioning of propellers is a key element in monitoring the work of the whole wind turbine.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Energy Efficiency Optimization by Spectral Efficiency Maximization in 5G
           Networks

    • Authors: Bujar Krasniqi, Blerim Rexha, Betim Maloku
      Pages: 495 - 503
      Abstract: Energy and spectral efficiency are the main
      challenges in 5th generation of mobile cellular networks.
      In this paper, we propose an optimization algorithm
      to optimize the energy efficiency by maximizing the
      spectral efficiency. Our simulation results show a significant
      increase in terms of spectral efficiency as well as
      energy efficiency whenever the mobile user is connected
      to a low power indoor base station. By applying the
      proposed algorithm, we show the network performance
      improvements up to 9 bit/s/Hz in spectral efficiency and
      20 Gbit/Joule increase in energy efficiency for the mobile
      user served by the indoor base station rather than by the
      outdoor base station.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Sequentially Distributed Coalition Formation Game for Throughput
           Maximization in C-RANs

    • Authors: Abiodun Omowunmi Gbenga-Ilori, Olufunmilayo Idayat Sanusi
      Pages: 505 - 512
      Abstract: Cloud radio access network (C-RAN) has been proposed as a solution to reducing the huge cost of network upgrade while providing the spectral and energy efficiency needed for the new generation cellular networks. In order to reduce the interference that occur in C-RAN and maximize throughput, this paper proposes a sequentially distributed coalition formation (SDCF) game in which players, in this case the remote radio heads (RRHs), can sequentially join multiple coalitions to maximize their throughput. Contrary to overlapping coalition formation (OCF) game where players contribute fractions of their limited resources to different coalitions, the SDCF game offers better stability by allowing sequential coalition formation depending on the availability of resources and therefore providing a balance between efficient spectrum use and interference management. An algorithm for the proposed model is developed based on the merge-only method. The performance of the proposed algorithm in terms of stability, complexity and convergence to final coalition structure is also investigated. Simulation results show that the proposed SDCF game did not only maximize the throughput in the C-RAN, but it also shows better performances and larger capabilities to manage interference with increasing number of RRHs compared to existing methods.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • On the Evaluation of Handover Exchange Schemes Between Two Cognitive Radio
           Base Stations with and without Buffers

    • Authors: Ebenezer Esenogho, Elie Ngomseu Mambou, Hendrik Ferreira
      Pages: 513 - 518
      Abstract: This article investigates and evaluates a handover
      exchange scheme between two secondary users (SUs) moving in
      different directions across the handover region of neighboring cell
      in a cognitive radio network. More specifically, this investigation
      compares the performance of SUs in a cellular cognitive radio
      network with and without channel exchange scheme. The investigation
      shows reduced handover failure, blocking, forced and
      access probabilities respectively, for handover exchange scheme
      with buffer as compared to exchange scheme without buffer.
      It also shows transaction within two cognitive nodes within a
      network region. The system setup is evaluated through system
      simulation.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Integrating Two Feedback Queuing Discipline into Cognitive Radio Channel
           Aggregation

    • Authors: Ebenezer Esenogho, Elie Ngomseu Mambou, Hendrik Ferreira
      Pages: 519 - 525
      Abstract: Queuing regime is one outstanding approach in
      improving channel aggregation. If well designed and incorporated
      with carefully selected parameters, it enhances the smooth
      rollout of fifth/next generation wireless networks. While channel
      aggregation is the merging of scattered TV white space (spectrum
      holes) into one usable chunk for secondary users (SU). The
      queuing regime ensures that these unlicensed users (SUs) traffic/
      services are not interrupted permanently (blocked/dropped or
      forced to terminate) in the event of the licensed users (primary
      user) arrival. However, SUs are not identical in terms of traffic
      class and bandwidth consumption hence, they are classified as
      real time and non-real time SU respectively. Several of these
      strategies have been studied considering queuing regime with a
      single feedback queuing discipline. In furtherance to previous
      proposed work with single feedback queuing regime, this paper
      proposes, develops and compares channel aggregation policies
      with two feedback queuing regimes for the different classes of
      SUs. The investigation aims at identifying the impacts of the twofeedback
      queuing regime on the performance of the secondary
      network such that any SU that has not completed its ongoing
      service are queued in their respective buffers. The performance is
      evaluated through a simulation framework. The results validate
      that with a well-designed queuing regime, capacity, access and
      other indices are improved with significant decrease in blocking
      and forced termination probabilities respectively.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Trellis Coded 4-ary PAM using Distance-Preserving Mapping

    • Authors: Thokozani Shongwe
      Pages: 527 - 533
      Abstract: A trellis coded 4-ary Pulse Amplitude Modulation
      (4-PAM) is presented, where the encoding algorith is derived
      from Distance Preserving Mapping (DPM) algorithm. In this
      work, we modify the DPM algorithm for 4-PAM and obtain a
      new construction for mapping binary sequences to permutation
      sequences, where the permutation sequences are obtained by
      permuting symbols of a 4-PAM constellation. The resulting
      codebook of permutation sequences formed this way are termed
      mappings. We also present several metrics for assessing the
      performance of the mappings from our construction, and we show
      that a metric called the Sum of Product of Distances (SOPD) is
      the best metric to use when judging the performance of the
      mappings. Finally, performance results are presented, where the
      mappings from our construction are compared against each other
      and also against the conventional mappings in the literature
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • The Method of Reversible Circuits Design with One-gate Prediction

    • Authors: Andrzej Skorupski
      Pages: 535 - 540
      Abstract: This paper presents an original method of designing reversible circuits. This method is destined to most popular gate set with three types of gates CNT (Control, NOT and Toffoli). The presented algorithm based on graphical representation of the reversible function is called s-maps. This algorithm allows to find optimal or quasi-optimal reversible circuits. The paper is organized as follows. Section 1 recalls basic concepts of reversible logic. Especially the cascade of the gates as realization of reversible function is presented. In Section 2 there  is introduced a classification of minterms distribution. The s-maps are the representation of the reversible functions where the minterms distribution is presented. The choice of the first gate in the  cascade depends on possibility of  improving the distribution. Section 3 describes the algorithm, namely how to find the optimal or quasi-optimal solutions of the given function.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
  • Design and analysis of single mode photonic crystal fibers with zero
           dispersion and ultra low loss

    • Authors: PRANAW KUMAR, Amrit Tripathy, Jibendu S Roy
      Pages: 541 - 546
      Abstract: PCFs (Photonic Crystal Fibers) with ‘T’ – shaped
      core have been proposed in this paper. ‘T’ –shaped core PCF
      structures have been analyzed using two different background
      materials: silica and lead silicate. A total of 3600 rotation at an
      interval of 900 has been introduced in the design of PCF
      structures. PCF structures A, B, C and D with rotation of 00, 900,
      1800 and 2700 have silica as wafer. Similarly PCF structures E, F,
      G and H with similar rotation have lead silicate as background
      material. Numerical investigations shows structures ‘D’, ‘F’, ‘G’
      and ‘H’ to have anomalous dispersion. PCF structures ‘F’, ‘G’,
      and ‘H’ have reported birefringence of the order of 10-2. Besides,
      other PCF structures report birefringence of the order of 10-3.
      Ultra low confinement loss has been observed in all the
      investigated PCF structures. Moreover, splice loss observed by
      the structure is very low. Large mode area has been shown by all
      the designed PCF structures.
      PubDate: 2018-10-28
      Issue No: Vol. 64, No. 4 (2018)
       
 
 
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