Now showing items 1-14 of 14

  • The Analysis of Closed-form Solution for Energy Detector Dynamic Threshold Adaptation in Cognitive Radio 

    Bozovic, R.; Simic, M.; Pejovic, P.; Dukic, M. L. (Společnost pro radioelektronické inženýrství, 2017-12)
    Spectrum sensing is the most important process in cognitive radio in order to ensure interference avoidance to primary users. For optimal performance of cognitive radio, it is substantial to monitor and promptly react to ...
  • Communication Subsystems for Emerging Wireless Technologies 

    Raida, Zbyněk; Kolka, Zdeněk; Marsalek, R.; Petrzela, J.; Prokes, A.; Sebesta, J.; Gotthans, T.; Hrubos, Z.; Kincl, Z.; Klozar, L.; Povalac, A.; Sotner, R.; Kadlec, P. (Společnost pro radioelektronické inženýrství, 2012-12)
    The paper describes a multi-disciplinary design of modern communication systems. The design starts with the analysis of a system in order to define requirements on its individual components. The design exploits proper ...
  • Detekce obsazenosti rádiového kanálu v obvodu FPGA 

    Jurica, Dušan
    Náplní práce je zmapování obvyklých i méně obvyklých metod detekce signálu v rádiovém kanále, počítačová simulace vybraných metod a implementace vybrané metody do obvodu FPGA
  • Generalized detector as a spectrum sensor in cognitive radio networks 

    Shbat, M.S.; Tuzlukov, V.P. (Společnost pro radioelektronické inženýrství, 2015-06)
    The implementation of the generalized detector (GD) in cognitive radio (CR) systems allows us to improve the spectrum sensing performance in comparison with employment of the conventional detectors. We analyze the spectrum ...
  • Impact of Noise Power Uncertainty on the Performance of Wideband Spectrum Segmentation 

    Tascioglu, S.; Ureten, O.; Telatar, Z. (Společnost pro radioelektronické inženýrství, 2010-12)
    The objective of this work is to investigate the impact of noise uncertainty on the performance of a wideband spectrum segmentation technique. We define metrics to quantify the degradation due to noise uncertainty and ...
  • Improved Energy Detector for Wideband Spectrum Sensing in Cognitive Radio Networks 

    Eghbali, Y.; Hassani, H.; Koohian, A.; Ahmadian-Attari, M. (Společnost pro radioelektronické inženýrství, 2014-04)
    In this paper, an improved energy detector for a wideband spectrum sensing is proposed. For a better detection of the spectrum holes the overall band is divided into equal non-overlapping sub-bands. The main objective is ...
  • An Integrated Frequency Reconfigurable Antenna for Cognitive Radio Application 

    Sharma, S.; Tripathi, C. C. (Společnost pro radioelektronické inženýrství, 2017-09)
    A novel integrated antenna that consists of spectrum sensing and frequency reconfigurable antenna, printed on a single substrate is presented here. The integration of both antennas is based on the fact that reasonably large ...
  • Klasifikace typu digitální modulace 

    Balada, Radek
    Tématem diplomové práce je klasifikace typu digitální modulace. Zájem o klasifikaci typu modulace v posledních letech vzrostl. Plní řadu možných úloh v civilním i armádním sektoru, používá se pro kontrolu signálů, identifikaci ...
  • Optimum Detection Location-Based Cooperative Spectrum Sensing in Cognitive Radio 

    Zhang, H.; Wang, X.; Kuo, G. S.; Bohnert, T. M. (Společnost pro radioelektronické inženýrství, 2010-12)
    Cognitive radio arises as a hot research issue in wireless communications recently, attributed to its capability of enhancing spectral efficiency and catering for the growing demand for bandwidth. As a good embodiment of ...
  • Robust Resource Allocation for OFDM-based Cognitive Radio in the Presence of Primary User Emulation Attack 

    Haghighat, M.; Fathi, H.; Sadough, S. M.-S. (Společnost pro radioelektronické inženýrství, 2012-12)
    Cognitive radio (CR) is a promising solution to improve the spectrum efficiency in which some unlicensed users are allowed to exploit frequency bands which are not used by licensed network. However, CR technology imposes ...
  • Sensing Task Allocation for Heterogeneous Channels in Cooperative Spectrum Sensing 

    Qihui Wu; Han Han; Jinlong Wang; Zhitao Zhao; Ze Zhang (Společnost pro radioelektronické inženýrství, 2010-12)
    In the traditional centralized cooperative spectrum sensing, all secondary users sense the same channel. But, for a given channel, there exists detection performance diversity among all the users, due to the different ...
  • Signal Detection for QPSK Based Cognitive Radio Systems using Support Vector Machines 

    Mushtaq, M. T.; Khan, I.; Khan, M. S.; Koudelka, O. (Společnost pro radioelektronické inženýrství, 2015-04)
    Cognitive radio based network enables opportunistic dynamic spectrum access by sensing, adopting and utilizing the unused portion of licensed spectrum bands. Cognitive radio is intelligent enough to adapt the communication ...
  • Spectrum Sensing Based on Higher Order Cumulants and Kurtosis Statistics Tests in Cognitive Radio 

    Bozovic, R.; Simic, M. (Společnost pro radioelektronické inženýrství, 2019-06)
    In this paper, new algorithms for spectrum sensing in cognitive radio based on higher order cumulants and kurtosis are proposed. The cumulants represent statistical signal processing based on pattern recognition for signals ...
  • Spectrum Sensing for Cognitive Radio Systems Through Primary User Activity Prediction 

    Ivrigh, S. S.; Sadough, S. M.-S. (Společnost pro radioelektronické inženýrství, 2012-12)
    Traditional spectrum sensing techniques such as energy detection, for instance, can sense the spectrum only when the cognitive radio (CR) is is not in operation. This constraint is relaxed recently by some blind source ...