In this paper, we study the performance of a cooperative spectrum sensing (CSS) scheme over imperfect feedback channels, where N secondary users (SUs) collaborate in order to enhance the detection probability of a primary user (PU). The sensing process is divided into two phases: In the first phase each SU, which is equipped with multiple antennas, independently detect the PU signal. In the second phase, the SUs' local decisions are sent via erroneous and orthogonal feedback channels to a fusion center (FC), where a final decision is made. We utilize Bayesian criterion which accounts for the costs of misdetection and false alarm. Quasi-Newton method is employed to obtain the optimal number of antennas for a given SNR and vice versa. Our simulation results concur the mathematical derivations and validate the optimality of quasi-Newton method. We further show that the derived optimal fusion rule outperforms the OR rule, AND rule and MAJORITY rule.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Centralized cooperative spectrum sensing with multiple antennas over imperfect feedback channels


    Contributors:


    Publication date :

    2014-11-01


    Size :

    538621 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Analysis and optimization of ARQ protocols for imperfect feedback channels

    Cam,R. / Leung,C. / Univ.of British Columbia,CA | Automotive engineering | 1993


    Performance of CPSC Spectrum Sensing over Fast Frequency-Selective Fading Channels

    Moreira, Guilherme S. L. / de Souza, Rausley A. A. / Bomfin, Roberto C. D. V. | IEEE | 2017



    Analytical and learning-based spectrum sensing over channels with both fading and shadowing

    Bagheri, Alireza / Shahini, Ali / Shahzadi, Ali | IEEE | 2013