Date Added: Nov 2012
The cognitive radio technology allows unlicensed users to utilize the licensed frequency band when it is idle. In this paper, the authors obtain a mathematical tradeoff between the number of samples used for spectrum sensing and the secondary user's throughput under different Nakagami fading conditions. This tradeoff depends upon the maximum outage probability allowed by the primary user, the number of cognitive users involved in the sensing and the fading environmental conditions. With energy detection as the spectrum sensing methodology, the expression for probability of false alarm in formulated in terms of probability of detection. Then the optimum tradeoff is arrived. Simulation results justify the above tradeoff.