Performance of energy detection based spectrum sensing in fading channels
Srinivas Nallagonda, Sudheer Suraparaju, Sanjoy Roy, Sumit Kundu · 2011
In order to enable access to underutilized licensed spectrum, a secondary user has to monitor licensed bands and detects occupancy of primary users in the different parts of the spectrum. However, detection is compromised when a user experiences shadowing or fading effects. In this paper we evaluate the performance of cognitive radio with energy detection based spectrum sensing (ED-SS) in AWGN, and several fading scenarios such as log-normal shadowing, Rayleigh, Nakagami, and Weibull fading environments. The performance has been assessed in terms of miss detection (Pm) and false detection probabilities (Pf). The performances of energy detector for different values of average SNR are characterized through complementary receiver operating characteristic (ROC) curves (plot of Pmvs. Pf). A simulation test bed has been developed to evaluate performance of ED-SS in different fading environments. A comparative performance of ED-SS has been studied for various fading channels.