Flexible Spectrum Access for Opportunistic Secondary Operation in Cognitive Radio Networks
Analytical formulations of dynamic spectrum access (DSA) with perfect sensing (PS) and imperfect sensing (IS) for two radio systems are presented. The DSA with PS model is solved explicitly using a two-dimensional Markov chain, respectively, while the DSA with IS model is solved numerically using a two-dimensional Markov chain. Grades of service (GoSs) like system airtime and blocking probabilities are considered. The performance of these GoS measures and the effect of the probability of false alarm and probability of misdetection for DSA with IS are evaluated. Numerical results illustrate that the effect of DSA with IS as compared with DSA with PS.