Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (4): 39-44.doi: 10.1016/S1005-8885(10)60081-7

• Wireless • Previous Articles     Next Articles

Analysis of secondary throughput and optimization in cooperative spectrum sensing

1,Lin Li2   

  1. 1.
    2. Beijing University of Posts and Telecommunications
  • Received:2010-12-01 Revised:2011-04-01 Online:2011-08-31 Published:2011-08-24
  • Supported by:

    This work was supported by The National Natural Science Foundation of China (60872149, 60672132).

Abstract:

In cooperative spectrum sensing, more secondary user makes more opportunity for detecting the vacant spectrums, which resulting the spectrum utilization improved, however much bandwidth would be occupied for sending the local observation results, inducing the reduced secondary throughput. In this paper, an adaptive algorithm for selecting detection threshold was proposed, where the maximized secondary throughput can always be achieved while assuring sufficient protection to primary user, regardless of the number of sensing users in cognitive radio networks. Theoretical analysis and simulation results validate the proposed scheme.

Key words:

cooperative spectrum sensing, secondary throughput, spectrum utilization, primary user, secondary user, detection threshold