A modified energy detection algorithm based on primary user activity for cognitive radio networks

Authors: Han, G.T., Ding, Y.Q., Mu, X.M. and Zhang, J.K.

Journal: Applied Mechanics and Materials

Volume: 548-549

Pages: 1351-1354

eISSN: 1662-7482

ISBN: 9783038350842

ISSN: 1660-9336

DOI: 10.4028/www.scientific.net/AMM.548-549.1351


Spectrum sensing is used to identify the unused frequency bands and as such plays a key role in dynamic spectrum access. In most of the existing spectrum sensing models, the channel state of primary user is assumed unchanged within the spectrum sensing duration, which is not suitable for the channels with high activity, in which the primary user accesses or vacates from the channel frequently. In this paper, a Modified Energy Detection (MED) algorithm is proposed for this scenarios by considering the primary user activity within the spectrum sensing duration. Theory analysis and computer simulation results show that both the probability of detection and false alarm in this scenarios have been improved with our MED. © (2014) Trans Tech Publications, Switzerland.

Source: Scopus