Optimization of spectrum sensing schemes for multi-mini slots distribution

Spectrum sensing in cognitive radio network is deeply discussed and rationally classified at time diversity channel. Furthermore, a uniform model for multi-mini slots distribution is proposed, in which a consecutive sensing slot is divided into several unequal length mini slots that are located symmetrically in a medium access control frame. Based on these, for a given probability of detection, there are two types of optimal schemes. The first one is designed to minimize the probability of false alarm, the other one is interested in maximizing the achievable throughput for the secondary network. Both of them are implemented by arranging the proportions of every mini slot in length for a limited total sensing time. The numerical simulation results and analysis perfectly supports the models and theoretical conclusions.